As a result of the uncontrolled discharge of industrial and agricultural waste by government agencies, wastewater pollution is of particular interest to public health. Even with an insignificant concentration of any technogenic substance and in the process of purifying tap water, the remaining toxins can harm a specific group of people or even an entire region, provoking mass poisoning. Therefore, water filtration is essential to avoid harm to public health. The most dangerous toxins that can persist in water for a long time are:
Substances with mutagenic, sensitizing, reproductive toxicity are also dangerous. Also important is the fact that as a result of various chemical processes in a toxic environment, new stable compounds can be formed.
INFLUENCE ON THE HUMAN BODY
Technogenic pollution of drinking water by the following substances is subject to special consideration:
Lead. In the 19th century in Western Europe, water pipes were made of blue bream, which caused a whole epidemic. Today, such poisoning is extremely rare. Pipes are made of materials containing lead in an insufficient concentration for poisoning. But due to the corrosion of pipes, lead can still get into the water supply system, and cause a violation of the nervous system. In addition, lead accumulates in the bone tissue, producing a number of unpleasant consequences, including cancer of the blood and kidneys. Dementia may develop.
Arsenic. The ingress of arsenic into wastewater is possible in the regions of its industrial production and near chemical plants. In history, there are cases of mass arsenic poisoning, which, at certain doses, leads to loss of appetite, nausea, hair loss, visual impairment, and at significant doses, to liver damage and cancer.
Mercury. Possessing mutagenic, neurotoxic and embryotoxic effects on the body, mercury causes serious poisoning, incompatible with life. In the 1950s, the most famous case of mass poisoning with mercury, contained in river waters at a concentration of 80-660 milligrams per liter, occurred in Japan. For 130 poisoned people, 52 died. & Nbsp;
Pesticides. An urgent problem for the population living near agricultural farms and dotted fields. Children and pregnant women are especially susceptible to the effects of pesticides. In the United States, a direct link has been found between long-term consumption of water containing pesticides and the occurrence of breast and stomach cancer. Certain pesticides can cause oncological diseases of organs: endocrine glands, liver kidneys.
ABOUT THE IMPORTANCE OF WATER PURIFICATION
More than 4 million chemicals have been synthesized by humans in less than half a century. Long-term research in this area and a number of egregious cases of drinking water poisoning have served as the main evidence for the need for thorough cleaning.
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