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What are caused by contaminated wer-

时间:2020-06-25 07:48来源:About us
What are caused by contaminated water? Author: Tim net water purification Views: 1744 Published: 2018-6-22 14:00:55 According to the World Health Organization (WHO) survey showed that 80% of human disease and 50% of child deaths are related

  What are caused by contaminated water? Author: Tim net water purification Views: 1744 Published: 2018-6-22 14:00:55 According to the World Health Organization (WHO) survey showed that 80% of human disease and 50% of child deaths are related to poor water quality and drinking water due to water pollution and sick people account for about half the worlds hospital inpatients. WHO research report emphasized that in developing countries, 80% of cases and 1/3 mortality is caused by drinking dirty water. International Water Association survey indicated that there are 25 million children under five due to drinking contaminated water and get sick to death each year. Research has shown that: the pros and cons of water quality and human liver, esophagus Xiang, gastric cancer incidence was positively correlated. According to statistics, China cancer cases occur each year as many as 1.6 million people, about 1.2 million people die each year from cancer, Kawasaki births occur in babies born each year, Kawasaki shape and a variety of congenital defects has 100 million people, were associated with water pollution related. harm caused by water pollution, mainly comprising three main: 鈶?water contamination by pathogenic microorganisms, can cause cholera, typhoid fever, poliomyelitis, infectious diseases such as hepatitis and dysentery; 鈶?water by heavy metals (Hg, pb, Cr, Cd, etc.) and other toxic inorganic substance (cyanides, arsenides, nitrite, etc.) pollution, poisoning cause various diseases; 鈶?water by organic matter, such as benzene, phenol, chloroform, tetrachloride carbon, pesticides, herbicides, synthetic detergents and other pollution, and intoxication can cause blood diseases, cancer and other diseases. In particular organic nitro compounds in water, amine compound, a halogen compound are strong carcinogens to plants, animals and humans. According to the source of water pollution, pollution of natural and man-made pollution divided into two categories, human pollution is divided into direct and indirect pollution contamination. According to the nature of water pollution, pollution can be divided into physical, biological and chemical contamination pollution categories. The main sources of pollution from the exhaust of factories, mines and other waste water, waste gas, waste residue; agricultural use of pesticides, fertilizers and poultry excrement, adding the fish feed, as well as separate waste waste peoples lives. Before the 19th century, mostly naturally contaminated water pollution, mainly against biological contamination. C10 has been found to chlorine in the water - ,,, HC10 forms exist, can penetrate the cell walls of bacteria, and play a role inside the cellular enzymes, disrupt the function of the enzyme, ofTo sterilization purposes. Meanwhile, the central fat organic chlorine that the water oxidative damage, and Mn2 +, Fe2 + oxidation is removed, so that the water quality is improved. Therefore, by adding coagulant, the precipitate was filtered, chlorination processes in the system water, as appropriate for people to drink. This is the first time "drinking revolution", creating a modern water supply industry. With the height of modern industrial development, water pollution is also increasing. In the 1970s, my countrys daily sewage amounted to 300-400 million tons, has more than 100 million tons, of which more than 80% without any treatment directly into the water, resulting in varying degrees of water pollution. Hydrology overall deterioration of ecological environment; to reduce the amount of water the river, dried up; falling water tables; reduction into the sea; soil erosion; reservoir sedimentation caused rivers and lakes, exacerbated by water pollution. Pollutants at the same time bring pollution, resulting in reduced water features, water quality aging, degradation. The negative effects of negative information due to the release of hazardous substances causing harm to human body. The current global water crisis, in particular in less and less fresh water, pollution is getting worse, more and more serious water degradation. Secondary pollution of tap water, it can not be ignored also bring harm to human health. Chlorinated strong oxidizing destruction of rice, vegetables, vitamins, the equilibrium of the intestinal flora is damaged; chloro-phenol was reacted with a strong stench chlorophenol; reaction of chlorine with organic substances generated chloroform, carbon tetrachloride and other carcinogenic substances, exacerbated by chemical pollution, leading to increased heart disease, cancer incidence. Todays water quality than in the past, has been a great change. Physical pollution and biological contamination in drinking water has been able to basically control inorganic pollution can be controlled, while the organic pollution is the principal contradiction, as the main enemy threatening human safety and health. Let us imagine why ancestors long drink the water, bread and water can live longer, and today water has less taste sweet and refreshing taste, water pollution so that the breeding of various diseases. Why do today with flowers water fish, not make a living, it does not brilliant, and even today it is difficult to clean water to wash clothes. Serious water pollution, would lead to the second "water revolution."

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