Why are more and more people loading water purifiers? What are the benefits of water purifiers?
Let’s talk about the advantages of several water purifiers. According to your own needs, do not blindly follow the trend, by the way, try not to buy the so-called direct water purifier, most of them are basically pit people, expensive, filter expensive, salespeople generally love exaggeration The actual role of the water purifier.
An ordinary water purifier can filter large particles of impurities, coarse filtration, low price, the average family can accept, an ordinary level 3 household water purifier costs only 300 yuan, and the cost of this water purifier maintenance It is also relatively low, but the filtered water needs to be heated to drink. This combination of water purifiers can be freely matched, generally PP cotton, activated carbon, fibrous activated carbon, glass filter and so on.
Ultrafiltration membrane water purifier, relatively speaking, the flow is relatively large, many merchants claim that the water can be directly consumed, this is wrong, the water needs to be heated to drink, relatively expensive than the ordinary top rated home water purifier, it It is generally an ultrafiltration membrane, but in some areas where water quality is not good, the membrane is prone to blockage.
Reverse osmosis pure water machine, as the name suggests, the core of this top HEPA water purifier is the reverse osmosis membrane, the price is more expensive than the price of the former two species, and it needs electricity, it needs to discharge wastewater, and the cost of use is relatively high. However, the water produced by the reverse osmosis pure water machine can be directly consumed. If you purchase a pure water machine, you do not need to use bottled water. If you need to drink hot water, you need to heat it.
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What is the working principle of the water purifier? Introduction to the principle and advantages of the water purifier
A good water purifier can effectively improve the quality of people’s drinking water. Now, for everyone, the quality of drinking water is also a guarantee for our health. Maybe everyone knows the advantages of the top 10 best water purifiers 2018 is not very clear, then Xiaobian will introduce you to the advantages of the water purifier.
How about the water purifier – the advantages of the indoor water purifier The water purifier is produced by the patented technology of porous inorganic microfiltration filter. It is made of pure natural diatomaceous earth and sintered at high temperature. It has higher precision than other water purifiers and can filter out more harmful substances in tap water. The ceramic filter has an average pore size of 0.2μm, which effectively removes bacteria, algae, residual chlorine and harmful dissolved heavy metal ions (lead, cadmium, chromium, etc.) in the water, providing clean water for washing vegetables, rice, and rice. And bring hygienic water to your life. The appearance of the water purifier is small and exquisite, and the design of the water purifier is more beautiful and user-friendly. It is different from other large water purifiers and is more affordable for ordinary consumers.
After reading the above article, I believe that everyone has a clearer understanding of the water purifier, and there are more choices when purchasing the water purifier.
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What are the advantages and disadvantages of ultrafiltration water purifiers?
Water purifiers are the most important water purification equipment in our lives. Gradually, household water purifiers, like refrigerators and water heaters, have become an indispensable necessity in family life. Advantages and disadvantages of ultrafiltration water purifier and the advantages and disadvantages of reverse osmosis water purifier? The specific content of Xiaobian for everyone to introduce below.
The ultrafiltration water purifier uses an ultrafiltration membrane. The advantage of this top 10 room water purifier is that it is relatively inexpensive. But its filtering ability is far less than RO reverse osmosis. It can filter sediment, rust, larger molecules, etc. in water, but it can’t do anything about pesticide residues, heavy metals, scales, etc.
Ultrafiltration water purifiers are suitable for use in areas where water quality is good, such as municipal tap water, and ultrafiltration can meet daily needs.
Reverse osmosis water purifier
For the treatment of very small molecular pollution, such as organic pesticide residues and heavy metals, RO water purifiers are the most ideal products.
Its RO reverse osmosis membrane pore size can isolate pollutants dissolved in water, such as pesticide residues, heavy metal ions, organic matter, colloids, bacteria, viruses and so on.
Advantages and disadvantages of ultrafiltration water purifier
1. Advantages: Ultrafiltration water purifiers usually do not need pumps or power consumption. Generally, the normal water pressure of municipal tap water is used. The main advantage is that the pH of the effluent can be kept constant while retaining dissolved oxygen in the water and trace minerals required by the human body. Therefore, the ultrafiltration membrane water purifier can also provide drinking water that meets the safety and health concept, but the filtered water is It is not possible to achieve direct drinking, which is the most direct difference between it and the RO water purifier.
2. Disadvantages: The effect of the ultrafiltration water purifier on the removal of chemical pollutants and scale in water is not as strong as pure water.
Advantages and disadvantages of reverse osmosis water purifier
1. Advantages: It can remove all kinds of harmful impurities in the water. The taste of the water is better, which can effectively reduce the hardness of the water. The container after boiling water does not produce scale.
2, shortcomings: reverse osmosis water purifier to use the pump, need to be energized, the price will be higher than the ultrafiltration water purification opportunity.
Both water purifiers have their own advantages and disadvantages, and none of them are absolutely strong. The use of the water machine determines the water purifier used based on local water quality. For water sources with good water quality, such as municipal tap water, ultrafiltration water purifiers can meet daily life needs. For industrial pollution, reverse osmosis water purifiers can be used in areas where water quality is difficult to protect.
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The role and characteristics of the water purifier
A friend who just came into contact with the top-rated large room water purifier may not know what kind of thing it is when he first heard the term water purifier. The vagueness may be related to water, but the specific effect is I don’t quite understand. The top 10 HEPA water purifiers are understood from the name to be the machine for purifying the water. In fact, a water purifier is a machine that has the function of purifying the tap water. Seeing here, the reader may be interested in how the water purifier cleans the water. “The water purifier will explain to you.
Speaking of the water purifier going back to the space program of the United States in the 1960s, everyone knows that people can’t drink water for a long time, and the astronauts who carry out the moon landing plan have to stay in outer space for a few months, carrying the spacecraft under the weight. Restrictions can’t carry too much water. Solving astronauts drinking water is a big problem. Scientists later put their ideas on the astronauts’ urine for this problem. They invented the water purifier to let the astronauts pull out the urine in outer space. After purifying into a pure water machine, circulating drinking, eliminating the load of the spacecraft carrying drinking water. It was only in the 1990s that this purification technology began to be used for civilian use. This is the source of household water purifiers.
What is the role of the water purifier? The function of the water purifier is to purify the water quality of tap water. Tap water did not need to be purified before. After the industrial revolution began, the water source around us began to be polluted by a large area. Chemical compounds and industrial waste penetrated through heavy channels and us drunk. In the water source, these substances will cause a series of serious diseases and cause cancer. The drinking water we use is no longer safe. The tap water we drink needs to be purified. That is why we need to use the water purifier. Another advantage of using a water purifier is that it saves the trouble of boiling water and bottled water. The water purifier uses tap water as a water source. As long as the tap water is continuously purified by the water purifier, we will continue to drink straight water at the cost of use. It is much lower than the start of the bottle and the bottled water.
The two most common filtration technologies for water purifiers: ultrafiltration filtration and reverse osmosis filtration. These two filtration methods have their own advantages and disadvantages. Our common kitchen water purifier central water purifier uses ultrafiltration machine. The ultrafiltration machine has a large purging capacity and can generally meet the requirements of domestic kitchen water. The reverse osmosis pure water machine has a small water flow rate, but its filtration precision is high. The purified water purified by the pure water purifier is close to the bottled pure water sold in the supermarket and is the best solution for solving the direct drinking water of the family. These two filtration technologies can be considered as follows: the high flow rate of the ultrafiltration machine is generally used as central water purification or kitchen domestic water purification, and the pure water machine has a high filtration precision and a small water flow rate to meet the needs of the family drinking water directly.
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Most household water purifiers or pure water machine first-stage filter cartridges are made of PP cotton filter. The first-stage filter will not only directly affect the water quality, but also affect the subsequent three or four-stage filtration effect. The life of the filter element, so the quality of the PP cotton filter is especially important for the water purifier. What is a PP cotton filter PP cotton filter, also known as melt-blown PP filter, uses non-toxic and odorless polypropylene particles, which are heated, melted, spun, drawn, and shaped to form a tubular filter. If the raw material is mainly polyester fiber, it can be called PP melt-blown filter.What are the advantages of the PP cotton filter? 01 Let the particles in the water be invisible When the water flows through the PP cotton filter, it enters the interior from the outer layer. The inner layer of the PP cotton filter is smaller, the smaller the aperture is, the higher the filtration precision is. Therefore, the particulate impurities will bridge when passing through the PP cotton filter channel. phenomenon. This allows those particles smaller than the pores to be intercepted by the PP cotton, and the various particulate impurities in the water are invisible, and all are filtered by the PP cotton filter.
02 Multi-layer gradient structure, large amount of dirt The PP cotton filter adopts a multi-layer gradient structure: the outer layer is coarse and the inner layer is fine; the outer layer is relatively loose and the inner layer is tight. This multi-layer gradient structure allows each layer of the PP cotton filter to intercept and store impurities in the water, and the amount of dirt is naturally large. 03 Clean and hygienic, large filtration flow PP polypropylene filter raw material polypropylene fiber is entangled by self-adhesive, does not require bonding of other materials, and has a clean chemical composition that meets food hygiene standards. In addition, the three-dimensional labyrinth structure of the PP cotton filter allows it to have a larger surface area and a higher porosity. The large surface area and more small holes allow the water to pass through the PP cotton quickly, and the filtration flow is increased.
04 Good stability, acid, alkali, organic solution, etc. The raw material of the PP cotton filter is polypropylene. The chemical stability of polypropylene is very good. Besides being attacked by concentrated sulfuric acid and concentrated nitric acid, it is stable to various other chemical agents. Because PP cotton has good stability, it is widely used in various fields such as chemistry and electronics.
The reason why PP cotton is widely used in the pre-filter filter of water purifiers is precise because of these advantages and the low production cost. However, the PP cotton filter can only filter out large particles of impurities in the water. For heavy metal ions and microorganisms in the water, it is also required to be subjected to deep filtration treatment for the subsequent filter element.
The PP cotton filter has a uniform and dense pore size, and the highest precision of filtration can reach 1μm. It is mainly used to filter out impurities larger than 1μm in tap water. In addition, the filtration process of the PP cotton filter is because the PP cotton filter belongs to the first filter of the water purifier. More than 80% of the impurities will be filtered out at this level, and the more impurities are filtered, the easier the filter element will block. Therefore, the life of the PP cotton filter is very short. The area with poor water quality may need to be replaced after more than two months, and the area with better water quality will not exceed six months. Therefore, if you purchase a PP cotton filter inside the household water purifier, in order to avoid secondary pollution of the water purifier and affect the filter effect of the filter, it is recommended that you replace the filter every 3-6 months.
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The role of the water purifier is not just to drink water!
Many people in the modern world choose to evade many things without knowing three words, but often you don’t know but it doesn’t mean it doesn’t exist. Just like water, seemingly clean water does not mean the presence of no dirt. Even if it is not seen by the naked eye, it will still damage our body and affect the health of ourselves and our families. Especially in this fast-paced, fast-paced era, heavy industry pollution is flooding every inch of air and water we have. Although we can’t choose air, we can choose good water.
Installing a water purifier is a guarantee for the safety of household drinking water. In fact, everyone knows that the water purifier is nothing more than the end drinking system, mainly to solve the problem of drinking water in our family, but in fact the water purifier is divided into three systems, according to the needs of the family, you can use different systems, the following small series Take everyone to find out:
First, the pre-filter system
This kind of system is generally installed behind the water meter of the household water inlet pipe. The main function is to remove impurities visible in the water, such as sand and rust. It is used to protect daily household appliances from water and to prevent blockage of water pipes.
Second, the end of the direct drinking system
This system is believed to be very familiar to most people. It is to purify our daily drinking water. It is usually divided into two types: ultrafiltration and reverse osmosis. These two types have obvious differences. Ultrafiltration top 10 best water purifiers It can remove bacteria and viruses in the water, while retaining the mineral elements contained in the water, but it will not remove the scale in the water; the reverse osmosis water purifier is actually a pure water machine, which can remove all the substances in the water, including of course The mineral elements contained in the water, so for the difference between the two, Xiaobian suggested that the ultrafiltration water purifier should be installed in the south. Because the hardness of the water in the south is low, it is recommended to use the reverse osmosis water purifier in the north because of the hardness of the water in the north. Higher.
Third, the whole house water purification system
This system is actually a combination of a central household water purifier and a central water softener based on the end drinking system and the front water purification system. The central water purifier is connected to the pre-filter and is generally installed in the kitchen. It can effectively remove residual chlorine, bacteria, viruses, heavy metals, and various organic substances in the water to ensure the water is clean and sterile. The central water softener, as its name suggests, is the water purification system that softens the water. The main function is to use the resin separation technology or nanocrystalline technology to remove excess calcium and magnesium ions in the water and reduce the hardness of the water. It is generally used for bathing and washing clothes, so the cleaning will make the skin is smoother and the clothes are softer.
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The water is transported by a galvanized iron pipe, and water and iron are oxidized to form red iron oxide, which further oxidizes to form black ferric oxide. Pipes in new buildings are more susceptible to oxidation. The faucet is turned on for the first time every morning, and the red material in the effluent is rust.
Iron is an essential element of the human body, but as one of the indicators of drinking water, the iron content per liter of water must not exceed 0.3 mg. If the naked eye can distinguish the color of the rust in the water or can smell the rust, the iron content in the water is greatly exceeded.
Excessive iron content, not only the perception, poor taste, long-term drinking, will increase the burden on the kidneys, leading to disorders of the endocrine system, high blood pressure, and other diseases.
2 aluminum and other heavy metals
During the transportation process, heavy metals such as lead are dissolved in the water. Long-term drinking will increase the burden on the liver and kidneys of the human body, and easily cause diseases in the liver, kidney, heart, and nervous system.
3 residual chlorine
Chlorine is a strong oxidizing agent with a pungent odor and a mouthfeel. Chlorine is a tap water disinfectant widely used internationally.
1. “When chlorine interacts with organic matter, such as sweat, it is easy to cause the formation of nitrogen trichloride in the surrounding air, which is very likely to damage the eyes and throat.”
2. “Residual chlorine may cause heart disease, coronary atherosclerosis, anemia, hypertension, liver and kidney discomfort, asthma and emphysema. For many years, the risk of cancer will increase!”
4 bacteria
Whether it is surface water or groundwater as a source of water, bacteria and E. coli in tap water can be said to be ubiquitous. The harm of bacteria and viruses, I believe this is no longer necessary.
The World Health Organization (WHO) survey shows that: 80% of the world’s diseases are caused by water pollution; about 1.2 billion people worldwide suffer from drinking contaminated water; 50% of global cancers are related to drinking unclean water; 50% of global deaths are drinking and contaminated Water causes; 25 million children under the age of five die from diseases caused by drinking contaminated water; more than 5 million people worldwide have cholera, diarrhea, and malaria caused by water pollution.
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How to choose a household water purifier, after reading this knowledge, you will not worry about choosing a water purifier in the future.
In recent years, with the development of society, the problem of air and water pollution has become increasingly serious. Everyone has gradually begun to focus on the quality of domestic water and drinking water. Traditional methods such as heating and boiling tap water and using water dispensers have long been unable to meet everyone’s requirements for healthy water. The emergence of household water purifiers has gradually attracted more people’s attention and has gradually become one of the necessary electrical appliances in every family. However, as far as the market development of domestic water purifiers is concerned, it is still very immature, and everyone lacks awareness of water purifiers. Many people want to buy a household home water purifier but they don’t know which water purifier is better. Today, Xiaobian introduces some common water purifiers in detail, hoping to help you choose the right hot sale water purifier.
First of all, what is the best choice for household water purifiers? We can choose according to the purpose and function of the water purifier. There are various types of household water purifiers on the market in the market. The names of pure water machines, water softeners, straight drink machines, etc., make many consumers dazzled when they choose. I don’t know which one to choose. Household water purifiers are divided into pre-filters, central water purifiers, central water softeners, and terminal straight drinkers. Of course, their respective functions and uses are different. Consumers must make these products before purchasing. Know clearly.
Pre-filter: Generally, it is installed on the surface of the water meter of the inlet pipe. It is the first coarse filtration equipment for the whole room. It can filter out the sediment, rust, large particles and so on in the tap water. It also stabilizes the water pressure and protects the water purifier equipment connected to it. Central water purifier: The most important thing is to carry out a more effective purification of water by the adsorption of KDF filter and activated carbon, which can remove many sediments, rust, bacteria, suspended solids, algae, macromolecular organics, etc. A poisonous and harmful substance can well retain the minerals beneficial to the human body in tap water, and the treated water can directly reach the quality standard of drinking water. Central water softener: This kind of water purifier is made of natural resin to exchange calcium and magnesium ions in water, which can reduce the hardness of water and soften water quality. It is called “soft water machine” and can also reduce water mine. The wear and tear of the clothes on the clothes and skin can protect our skin, protect the clothing, and prevent the minerals in the water from producing yellow spots in the sanitary ware, tableware and other supplies, and prevent the water pipes and water heaters from generating scale, which can be better and convenient. Everyone’s domestic water. Terminal straight drink machine: It adopts high-precision five-stage filtration design. The tap water is filtered at the water terminal, and the water directly reaches the quality standard of raw drinking water. Unscrewing the tap water tap can directly Drinking, to achieve the effect of the instant drink, avoid secondary pollution of water quality, water activity is relatively large, retaining high oxygen, can promote human metabolism, enhance the vitality of human cells. The water purifier has an exclusive space Technology, super five-level purified water effect, can give good quality water to the upper layer of the whole household.
Secondly, we can choose the water purifier based on the actual needs of our home. If the water quality of the household is relatively good, the water does not have obvious abnormalities such as color and odor. You can choose a combination of a pre-filter and a central water purifier to remove sediment and rust from the water. Bleaching powder, bacteria can be; if the water quality in the home is relatively poor, you can choose the combination of pre-filter and central water purifier plus terminal straight drink machine, which can ensure the health of drinking water well; The scale phenomenon is obvious, the hardness of the water is relatively high, then the water needs to be thoroughly softened, and then everyone needs to use a water softener to facilitate domestic water. Under the premise of economic conditions, or the effect of water treatment is relatively high, you can choose to install a full set of water treatment system so that drinking water and domestic water can get the best treatment effect.
Finally, we can also purchase from the energy-saving and efficient aspects of the water purifier. In addition to the functional use of household water purifiers and the choice of water quality, a good household water purifier must have a collection of energy-saving, high efficiency, large capacity, and many other characteristics. The water purifier must also be silent and non-leakage, using a “can-free” integrated design, which can save half of the space. The water purifier completely loses the supercharged model of the traditional electric pump and opens up the innovative water-to-water supercharging technology. It does not need to be plugged in and only requires municipal water pressure to operate. There are many types of household water purifiers. Which one is the best choice can not be generalized. Each water purifier product has its unique features and uses. Such a household water purifier is the best as long as it is suitable for the water needs of the home.
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Most of the water purifiers adopt the progressive structure of the screen filter principle. The multi-stage filter elements are connected in series, and the precision of the filter elements is arranged from low to high in order to realize the multi-stage filter element to share and retain dirt, thereby reducing the filter plugging. And the number of manual sewage, wash and wash, and the period of replacement of the filter. Another new design idea is to apply the self-cleaning structure of the principle of mass distribution. Its design idea is no longer to provide as much space as possible for contaminant pollution, but to adopt a principle of separation to separate a small part of the clean water, at the same time, as far as possible, let the raw water flow as usual, so that the dirt is taken away with the water flow in time, so that the water does not rot. In this way, both purified water is obtained, and it is not easy or difficult to precipitate dirt in the machine, avoiding secondary pollution and greatly reducing filter loss, and the water quality is better, safer, and energy-saving than low carbon. This new principle of self-cleaning water purifier won the gold medal of the 7th International Invention Exhibition, which is a one-in and two-out structure. It improves the concentration of raw water impurities in the machine due to the structural defects of the traditional water purifier. The higher the accumulation, the more the sewage becomes, and therefore the self-cleaning water purifier has no concept of sewage and sewage water purifiers instead of washing water. With the improvement of living standards, the popularity of water purifiers will become wider and wider, and new technology products are better meeting people’s needs. 1. Folding single-stage filtration: using 1μm or 5μm PP cotton fiber filter + UDF coconut shell granular activated carbon filter, can remove more than 5μm float and particulate matter in water, clarify water source, activated carbon adsorption can effectively absorb the odor of water, The residual chlorine in the water improves the taste of the water. Only suitable for high-quality drinking water sources. Generally, the tap water source cannot be drunk after being filtered. 2. Folding two-stage filtration: use 1μm or 5μm PP cotton polypropylene fiber filter to remove more than 5μm float and particle material in water, clarify the water source; use 5μ CTO pressure sticking activated carbon filter to effectively absorb the odor in water, partially remove organic Inorganic impurities can effectively adsorb residual chlorine in water, improve the taste of water, and only adapt to high-quality drinking water. Better than single-stage filtration. Generally, the tap water source cannot be drunk after being filtered. 3. Folding three-stage filtration: using 5μm PPF polypropylene fiber filter to remove more than 5μm float and particle material in water, clarify the water source; use 5μmCTO pressure sticking activated carbon filter to effectively absorb the odor in water, partially remove organic and inorganic impurities, It can effectively adsorb residual chlorine in water and improve the taste of water. It uses 0.1μm CF whole diatom microporous ceramic filter: it can remove Escherichia coli, Salmonella, Staphylococcus aureus, Pseudomonas and mold pathogens larger than 0.1μm in water. Adapt to the tap water source with good water quality, combined with the pre-treatment process, the treated water reaches the CJ94-1999 drinking water quality standard water, which can be directly consumed. 4. Folding four-stage filtration: 0.5μm CF whole diatom microporous ceramic filter can remove rust, red worm and float and particle materials in water more than 0.5μm, clarify the water source; use 5μmCTO pressure stick activated carbon filter to effectively absorb water Color odor, partially remove organic and inorganic impurities, can effectively adsorb residual chlorine in water, improve the taste of water; use 0.1μm CF whole diatom microporous ceramic filter: can remove Escherichia coli, Salmonella, Staphylococcus aureus larger than 0.1μm in water , Pseudomonas and mold pathogenic bacteria; PPF polypropylene fiber + UDF coconut shell granular activated carbon two-stage filter can remove the odor of water, so that the purified water has a sweet and fresh taste. Adapted to the general tap water source, combined with the pre-treatment process, the treated water reaches the CJ94-1999 drinking water quality standard water, which can be directly consumed, which is better than the three-stage filter. 5. Folding five-level filtering: Now with the development of technology, there is a maximum of 10 or higher filtering levels. • PP cotton: 5-micron aperture filter to remove all kinds of tiny impurities such as residual sediment and rust in the water. • KDF (copper-zinc alloy body precision activated carbon) removes water-soluble lead in water, heavy metals such as mercury and arsenic, and supplements zinc elements beneficial to the human body. It integrates adsorption and filtration into one and removes free chlorine and chloroform in water. The rate is as high as 96% and further removes pesticide residues from the water. Fertilizers and radioactive materials, and have the effect of discoloration and odor removal. Deeply adsorbs substances such as halogenated hydrocarbons and organic substances that are harmful to the human body, and increases the sweet taste of water. The filter has a long service life and a metal removal rate of up to 99%. • Resin: For areas with high water hardness, the hard water with high calcium and magnesium content is alternately converted into soft water to prevent the human body from suffering from stone disease due to long-term consumption of hard water. • Anti-oxidation filter: Free radicals in the body are an oxidized product, so they can be removed by redox. The oxidation-reduction potential is the lowest, the better the effect, the high-energy activated water, and the ultra-low redox potential. The lowest in the water, it can remove free radicals very well. • Antibacterial silver-loaded rear filter T33: Made of tropical rainforest coconut shell, with a large internal pore size, which can effectively inhibit bacteria, adsorb odor and pigment, and deeply treat organic and inorganic compounds, and use ions released by silver to eliminate the cold virus. And other pathogenic agents. • UF ultrafiltration membrane: an asymmetric semi-permeable membrane made of ultra-micro-pore polymer material, which is hollow capillary-shaped, the wall of the tube compensates for micropores, and uses the tap water pressure as the power to separate the liquid by the pore size of the fine molecular membrane. The screening process, with a pore size of 100 nm, efficiently removes bacteria, viruses and heat sources. • AT light wave energy conversion filter: According to the human infrared light wave absorption theory, the infrared light wave material with energy of 2-20um is used to act on the light wave heat effect generated by the water body, and stimulate the vibration energy level of the water molecule, thereby activating the biological macromolecular activity of the nucleic acid-protein and recovering The body functions and balances. • High-energy high-magnetic double-loop long-process magnetization filter: Using bipolar double-sided high-magnetic re-magnetization magnetic steel technology, multiple times of magnetic line cutting is performed on closed-circulating liquid, and the high magnetic flux can reach 3000 Gauss. The small molecule of water is agglomerated, has magnetic memory, and maintains the activity of water for a long time, and is small molecule water that is not reduced. Recommendation: If you are buying a best and cheap water purifier, it is recommended to first understand the two technologies of the household water purifier industry: • Reverse Osmosis: Reverse osmosis is recognized as the safest and most scientific water treatment technology in the world. The water coming out through the reverse osmosis membrane is basically pure water, which is only water molecules, so it is the safest. • Ultrafiltration. The filtration precision of ultrafiltration is inferior to that of reverse osmosis, but it is not pure water. Because the pore size of the ultrafiltration membrane is larger than that of reverse osmosis, some manufacturers have publicized that ultrafiltration water purifier is a water purifier that can retain minerals. In fact, it is light to avoid, since it is not pure water.
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What are the main pollutants in the air and what kind of harm will they cause to people?
One: The pollutants in the air are: 1. Carbon monoxide: It is a colorless, odorless and odorless flammable and toxic gas. It is a product of incomplete combustion of carbonaceous fuel. In high-altitude cities or cold environments, the problem of carbon monoxide pollution is more prominent. 2. Nitrogen oxides: mainly refers to nitrogen monoxide (NO) and nitrogen dioxide (NO2), most of which are derived from the high-temperature combustion process of fossil fuels. Nitric oxide is relatively harmless. But it is quickly oxidized by ozone in the air and blackened into nitrogen dioxide. Combustion of nitrogenous fuels (such as coal) and nitrogenous chemicals can also directly release nitrogen dioxide. Mobile emissions are generally one of the main sources of urban nitrogen oxides. 3. Ozone: It is a representative of ozone pollutants of photochemical smog. It is formed and enriched by a series of complex atmospheric chemical reactions under the strong sunlight by nitrogen oxides and hydrocarbons in the air. Although ozone in the upper stratosphere has important anti-radiation protection for Earth’s life, ozone at low altitudes in the city is a very harmful pollutant. 4. Hydrocarbons: Hydrocarbons in nature are mainly produced by the decomposition of organisms such as methane and ethylene. Methane has a stable structure and does not cause photochemical pollution. However, ethylene has a strong photochemical activity and also produces formaldehyde to irritate the eyes. Anthropogenic hydrocarbon emissions come mainly from incomplete combustion processes and evaporation of volatile organic compounds. Most of the hydrocarbon components are not harmful to human health but can lead to the formation of photochemical smog. 5. Sulfur oxides: mainly refers to sulfur dioxide (SO2), sulfur trioxide (SO3) and sulfates, such as burning sulfur-containing coal and petroleum. In addition, natural processes such as volcanic activity also emit a certain amount of sulfur oxides. Sulfur dioxide has an important impact on human health. Sulfur dioxide is highly irritating to the human conjunctiva and upper respiratory tract mucosa. It can damage bronchial tubes and can cause bronchitis, pneumonia, and even pulmonary edema. The mortality rate of elderly or chronic patients with short-term exposure to sulfur dioxide concentration of 0.5 mg/m3 is higher than 0.25 mg/m3, which may worsen the condition of patients with respiratory diseases. People with long-term exposure to air at a concentration of 0.1 mg/m3 have increased respiratory symptoms. In addition, sulfur dioxide is likely to cause corrosion, peeling, fading and damage to metal materials, house construction, cotton-spun chemical fiber fabrics, leather paper, and other products. It can also make plant leaves yellow or even dead. According to the national environmental quality standards, the daily average concentration of residential areas is less than 0.15 mg/m3, and the annual average concentration is less than 0.06 mg/m3. And further, react with the water in the air to form acid-level pollution. Sulfur dioxide is a ubiquitous pollutant in cities. The sulfur dioxide in the air mainly comes from industrial production in thermal power generation and other industries, such as combustion of fixed-source fuels, production of non-ferrous metals, production of steel, chemicals, and sulfur plants, and emissions from small heating boilers and civil coal stoves. Sulfur dioxide is a colorless gas that is irritating and easily oxidized to sulfur trioxide under the catalysis of sunlight or some metal oxides in the air. Sulfur trioxide has a strong hygroscopicity and forms a sulfuric acid mist after contact with water vapor, and its stimulating effect is 10 times stronger than that of sulfur dioxide, which is also the main reason for the formation of acid rain. The inhaled sulfur dioxide in the human body mainly affects the respiratory tract. It quickly contacts the water in the upper respiratory tract, forming a strong stimulating effect of sulfur trioxide, which can impair the function of the respiratory system, aggravate the existing respiratory diseases, and produce a series of symptoms. Such as asthma, shortness of breath, cough and so on. Those most susceptible to sulfur dioxide include asthma, cardiovascular, chronic bronchitis and emphysema, as well as children and the elderly. When sulfur dioxide coexists with the following particles, the harmful effects are enhanced. 6. Particulate matter: mainly refers to liquid or solid matter dispersed in the air. Its particle size is in the grade of rice, and the particle size is about 0.0002-100 microns, including aerosol, smoke, dust, fog and soot. And many other forms. Particulate matter is a general term for soot and dust. There are natural sources such as sand and dust, volcanic eruptions, forest fires, and other particulate matter; there are also some sources of particulate matter, such as industrial activities, construction, garbage incineration, and vehicle exhaust. Since particulate matter can adhere to toxic metals, carcinogens, and pathogenic bacteria, it is more harmful. Particulate matter in the air can be further divided into dust falling, total suspended particulate matter and respirable particulate matter. Among them, inhalable particles can penetrate into the lungs with the respiration of the human body, producing toxic effects. 7. Mercury (Hg) and its compounds are highly toxic substances that can accumulate in the body. Mercury in the air migrates into the water body by leaching in the rain. The harm of mercury in the water body is mainly caused by headache, dizziness, numbness, and pain. Methylmercury in total mercury is easily absorbed by the liver and kidney in the human body, and only 15% of it is absorbed by the brain, but the first damage in brain tissue, and it is difficult to treat, often causing death or death for a lifetime. 8. Volatile Organic Compounds: This chemical includes benzene, formaldehyde, and 1,3-butadiene (Butadiene), which are formed by incomplete combustion of automotive fuels and evaporation of petroleum, oil, and lubricants. Even at low concentrations, it can cause cancer, cardiovascular disease, and liver and kidney dysfunction. They may also cause congenital malformations and infertility. Volatile organic compounds react easily with oxygen and other oxidants, releasing more dangerous toxins. 9. Lead: Enter the body through air, food, and water. It can also be attached to dust particles and stored in blood, bones and soft tissues. Lead can cause severe kidney disease, liver disease, nervous system diseases, and other organ problems. In addition, it can lead to psychological disorders, paralysis, and mental retardation, especially to children. For decades, lead has been entering the atmosphere through tail gas from leaded gasoline. In 2003, Russia banned the production of leaded gasoline, which led to a rapid decline in lead concentrations in the country’s atmosphere. Lead, like other heavy metals, can penetrate into plants, so people must be careful when burning leaves, because this very dangerous toxin may turn back and return to the air. 10. Toxic substances: Even if the air contains trace amounts of toxic substances, it will cause serious damage to plants and animals. The US Clean Air Act lists 188 species released by industrial equipment, 21 species released from automobile exhaust, and typical toxic compounds contained in 33 urban air. Most of these toxins can cause cancer or cause DNA damage. After they are attached to the surface of suspended particles, they are more harmful to humans and animals. It is found that gu is caused by toxic substances and can even be passed on to future generations. Smaller concentrations of toxic substances can only show toxicity in special circumstances. Toxin concentration is an important criterion for assessing the ecological environment. Second: the adverse effects of air pollution on humans 1. Cause respiratory diseases; 2. The harmful substances in crops will increase, causing harm after eating; 3, causing people’s mental and emotional well; 4. Destroy local ecology and harm organisms in the area.
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