Nowadays, food safety problems have arisen in an endless stream. Even people who drink water do not trust. Therefore, many people will choose to use water purifiers to purify tap water again. The brands and types of water purifiers in the market may be dazzled. Consumers are not only doubtful about these: Is a water purifier useful ? What brand of water purifier is good? Xiao Bian took the same question and selected the four types of water purifiers that are currently on the market. Through the understanding and comparison of the water purifiers' working principles , we can see if the water purifiers are used in the end.
| The need to install a water purifier: |
Some people say that tap water is quite healthy and there are many minerals inside. In fact, tap water can be used to kill viruses and bacteria after being sterilized by chlorine, but it cannot remove heavy metals, volatile substances, etc.; tap water is susceptible to long-distance transportation via pipelines. Secondary pollution, so tap water will basically choose to boil and drink again, but boil can only solve bacterial problems and can not solve the problems of sediment, rust, heavy metals, volatile substances and corpses of bacteria, and these problems will cause health problems. Serious hidden dangers.
In recent years, domestic water pollution has been severely aggravated, and people are increasingly aware of the importance of drinking water. The emergence of bottled water and drinking fountains did indeed improve the human drinking water environment to a certain extent, but its inevitable secondary pollution and poisonous barrel incidents were exposed one after another. Household water purifiers became the only choice for people to drink water.
| A common water purifier type |
According to the different ways of water purification, the common water purification equipment on the market can be roughly divided into pre-filters, water purifiers, softeners, and water purifiers, among which water purifiers have ultrafiltration membranes and UV purifiers. The water device.
1, pre-filter; 2, ultrafiltration membrane water purifier; 3, UV water purifier; 4, soft water machine; 5, pure water machine
| Second, water purifier useful? Water Purifier Working Principle |
1, pre-filter
The pre-filter is generally installed at the front of the pipe, so it is named after the word “pre-positionedâ€; while “filtering†refers to the working filter of this type of device is a stainless steel filter. It is usually a "T" type structure. The upper and lower ends of the "one horizontal" position are the inlet and outlet, respectively. The lower "one vertical" position is the cylindrical filter of the fuselage and the inside, and the lower end is the sewage outlet. A valve controls opening and closing.
The filter's accuracy range varies from 5 to 300 microns depending on brand and model. The main removal of the pipe produced by the precipitation of impurities and bacteria, microbial debris, rust, sand and other particulate impurities greater than 5 microns, to avoid the human body and skin damage; and the downstream pipelines, water purifiers, water heaters, washing machines, high-end The faucet and flower pots play an active role in protection. The pre-filter can also be added with “hydrochloride-resin-enriched†scale-resistance filter elements that act as a scale inhibitor for solar and water boilers. It should be noted that the water purified using the prefilter cannot be used directly.
Ten pre-filter brands: US 3M, Honeywell Germany, Enmet Germany Enmet, Germany Hans Hill, Aihuipu, Fudan Shenhua Waterman, Conrad, Bancrom, World Health, Pentair
2, water purifier
Ultrafiltration membrane water purifier: Ultrafiltration membrane water purifier is based on ultrafiltration membrane, other filters such as activated carbon (excluding energy filter) supplemented to achieve the purification of tap water, in addition to the effective filtration of sediment, rust in the water Asbestos fiber and other oxides and sulfide particles can also remove parasitic protozoan cells such as Giardia, Entamoeba, Cryptosporidium, and molds, earthy and muddy tastes. Ultrafiltration membrane water purifier can make the water more pure, but still can not achieve direct drinking.
Ultrafiltration membrane water purifier top ten brands: US 3M, Aihuipu, World Health, Conglikan, Dalton, UK, Germany Hans Hill, Honeywell, Bancrom, British Denton, Fudan Shenhua plumber
Ultraviolet water purifier: Ultraviolet water purifier is used to sterilize the water flowing through the reaction chamber through the built-in ultraviolet light with a short-wavelength ultraviolet ray with a central radiation wavelength of 253.7 nm, so as to solve the problem of exceeding the standard of bacterial indicators of drinking water and contaminating the bacteria. The water quality meets and exceeds the national drinking water related hygiene standards. Ultraviolet-sterilized water is generally not directly drinkable.
Ultraviolet water purifier well-known brands: Fudan Shenhua plumbers, the United States 3M
3, soft water machine
Softener mainly removes calcium and magnesium ions from the water through ion exchange resin and reduces water hardness. Compared with tap water, soft water has a very clear taste and feel. Soft water has high oxygen content and low hardness, which can effectively prevent stone disease, reduce the burden on the heart and kidney, and have a good health. The water purified by the water softener cannot be directly consumed.
Ten brands of softeners: Pentair, Germany, Hans Hill, Germany, Paragon, Fudan Shenhua Plumber, US 3M, Econ, Congligen, GE, Enmet, Germany
4, pure water machine
The pure water machine is a kind of pure water that is produced through the filtration process (physical method) of raw water through the current international popular reverse osmosis and other methods without adding any compound. The water purified by the pure water machine can be directly consumed, which is the only water purification machine in the market that can produce drinking water.
Pure water machine well-known brands: United States 3M, Honeywell, Conradium, Enmet Enmet, Pentair, Xiongjin Howe
Water Purifier Kitchen Appliances Garden Water Purifier Water Purifier Decoration Design Stainless Steel
Thiocyanate (also known as rhodanide) is the anion [SCN]−. It is the conjugate base of thiocyanic acid. Common derivatives include the colourless salts Potassium Thiocyanate and Sodium Thiocyanate. Organic compounds containing the functional group SCN are also called thiocyanates. Mercury(II) thiocyanate was formerly used in pyrotechnics.
Thiocyanate is analogous to the cyanate ion, [OCN]−, wherein oxygen is replaced by sulfur. [SCN]− is one of the pseudohalides, due to the similarity of its reactions to that of halide ions. Thiocyanate used to be known as rhodanide (from a Greek word for rose) because of the red colour of its complexes with iron. Thiocyanate is produced by the reaction of elemental sulfur or thiosulfate with cyanide
Thiocyanate[4] is known to be an important part in the biosynthesis of hypothiocyanite by a lactoperoxidase.[5][6][7] Thus the complete absence of thiocyanate[8] or reduced thiocyanate[9] in the human body, (e.g., cystic fibrosis) is damaging to the human host defense system.[10][11]
Thiocyanate is a potent competitive inhibitor of the thyroid sodium-iodide symporter.[12] Iodine is an essential component of thyroxine. Since thiocyanates will decrease iodide transport into the thyroid follicular cell, they will decrease the amount of thyroxine produced by the thyroid gland. As such, foodstuffs containing thiocyanate are best avoided by Iodide deficient hypothyroid patients.[13]
In the early 20th century, thiocyanate was used in the treatment of hypertension, but it is no longer used because of associated toxicity.[14] Sodium nitroprusside, a metabolite of which is thiocyanate, is however still used for the treatment of a hypertensive emergency. Rhodanese catalyzes the reaction of sodium nitroprusside with thiosulfate to form the metabolite thiocyanate
Our main Thiocyanates are Sodium Thiocyanate, Potassium Thiocyanate, ammonium thiocyanate.
Thiocyanate
Sodium Thiocyanate, Potassium Thiocyanate,ammonium thiocyanate
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