Why do you have to know something about water knowledge - see "chlorine" in the front and back time: 2019-01-09 13:58:26 chlorine in drinking water comes from tap water is chlorine in the water plant? after the remaining amount of chlorine disinfectant to the water before the water was added. Water plant not only to ensure water effluent have some chlorine, but also to ensure that tap water arrives there is a certain amount of residual value when the pipe network peripheral contact with the user. The purpose of adding a microorganism of disinfectant in the water is tap water in the water pipe network and killing, including water, algae and other pathogens, so as to prevent the spread of water as a medium and prevalence of infectious diseases. The residual chlorine in tap water main is to eliminate coliform bacteria and algae. What is the national standard chlorine? Chlorine forms include water free residual chlorine and combined chlorine. In the form of free residual chlorine includes chlorine, hypochlorous acid, hypochlorite ions. A chlorine compound includes monochloramine, dichloramine and trichloramines. Chinas "drinking water health standards GB5749-2006" requirements for disinfectant indicator is: If using chlorine or chlorine free preparation for the disinfection, the water balance of the factory should not be less than 0.3mg / L, no more than 4mg / L , while the balance of tap pipe is not less than 0.05mg / L; if using a chloramine disinfection, the total chlorine finished water should be not less than 0.5mg / L, not more than 3mg / L, while the tip of the pipe network I of not less than 0.05mg / L. Key plan contains some residual chlorine in tap water, and the water quality worse the higher chlorine content area. To maintain a certain amount of residual chlorine in tap water to ensure that the root cause is not more than the standard number of microorganisms in the water, because chlorine disinfection on behalf of the water. However, in accordance with national drinking water standard of living, residual chlorine content (tap water) tap water was 鈮?.05 mg / l, the upper limit of chlorine content as yet clearly defined. That is a serious water pollution in the region, in order to suppress the propagation of water remaining bacteria once again, to maintain continuous disinfection, the usual practice is, that chlorination. Chlorination easy, but at the same time the amount of chlorine control is to control the amount of residual chlorine, chlorine disinfection method which is the most important process requirements, currently consists of a considerable part of the process water plant behind the control of the chlorine is not in place, so people often drink tap water containing bleaching powder pungent smell of children. If the long-term ingestion may harm human health. But these hazards are generally required specialized equipment precision instruments to detect, andAnd there is no very clear evidence, but it is undeniable that there is no evidence of harm does not mean that does not exist. Frightening when chlorine disinfection by-products and organic acids, will produce many carcinogenic byproducts, 1974 and U.S. Belier Netherlands Rook first found trihalomethanes (THMS) pre chloride and sterile water, chlorine, chloroform, disinfection by The product (DBPS), and having a carcinogenic, mutagenic effect. Mid-1980s, it has been found another type of haloacetic acids (HAAS), greater cancer risk, such as chloroform, dichloroacetic acid (DCH) and trichloroacetic acid (TCA) were carcinogenic risk of chloroform and 50 times 100 times. To date, with advances in technology, it has been detected in the water in the 2221 kinds of organic pollutants in water and found that 65 kinds, in which 20 kinds of carcinogens, mutagens 56 kinds. Currently, most of the experts have reached a consensus, the use of chlorinated water and drinking water chlorides and indeed the chances of cancer inseparable relationship. Wisconsin Hospital researchers found: tap water free residual chlorine and derivatives "chloroform, carbon tetrachloride and other carcinogens, mutagens," in addition to drinking from the mouth into the body, there are a large part of the people wash, wash your hands, gargle, from the skin pores, hair enter the body. According to reports, water, chlorine and toxic and hazardous materials, more than 80% from the skin into the body. Therefore, water pollution has seriously affected chlorine, impurities and pipes, tanks and other human health. What are the factors affecting disinfection byproducts? Research has shown that disinfection by-products harmful to human health impact. Many factors affect the disinfection by-products in drinking water, including the following aspects: (1) the type and concentration of pollutants in the water. Surface water pollution in general, multiple types of pollutants, and the resulting byproducts oxychloride species and much higher concentrations less deep groundwater contamination. (2) ph value of the water, the water temperature and bromine ion can affect the disinfection by-products in various degrees. These three levels are elevated to aquatic trihalomethane formation probability will rise. (3) the amount of chlorine may be affect the level of disinfection by-product concentration, which can also affect the distribution of species. Further, the disinfection procedure, chlorine contact time, the amount of chlorine, the season, the influence of metal ions are generated DBPs. Healthy drinking water, first start, can effectively tap water chlorine disinfection from chlorine know, but at the sameWhen chlorine residual control is not in place, there is an excess over the issue, for their own health, but also be sure to pay attention to. Secondly, the chlorine will produce terrible carcinogenic serious disinfection by-products, such as chloroform mutagenic tendency of drinking water health hazard exists. Factors affecting disinfection byproducts complex, very difficult to control, will continue to exist within the next for a long time. Drinking water safety at stake, quality decision sanguine, sanguine determinants of health, health plans, please use water purification equipment as soon as possible.
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