What are the harms of excessive mercury in water to the human body
Mercury is one of the most toxic elements in heavy metal pollution. After ingestion, it sinks directly into the liver, causing great damage to the brain, nerves, and vision. Natural water contains 0.01 mg per liter of water, which will cause human poisoning. Sewage produced in the process of human life is one of the main sources of water pollution. Mainly feces and washing sewage. The amount of domestic sewage discharged by each person in the city is about 150-400L per day, which is closely related to the living standard. So what are the harms of excessive mercury in water to the human body? Mercury in water is harmful to the health of the human body, and it damages the kidneys and system as the main organs. For example: In the 1950s, a shocking public nuisance incident occurred in Minamata City, Kumamoto Prefecture, Japan. After inspection, it was found that the wastewater discharged from a factory contained methylmercury, which contaminated fish. People eat fish containing high concentrations of organic mercury for a long time, and they will ingest mercury into the body and cause poisoning. As of February 1976, there were 1,386 local people suffering from Minamata disease. In order to prevent mercury poisoning incidents, the water quality standards for domestic drinking water and farmland irrigation water formulated in accordance with the 'Environmental Protection Law of the People's Republic of China' stipulate that the mercury content should not exceed 0.001 mg/L. Reminder: The mercury online analyzer in water is a pretreated water sample that is injected into a special reactor by a syringe pump and then reacts with an oxidizing reagent to uniformly oxidize all forms of mercury in the water sample into divalent mercury ions, and then Reduce the excess oxidant, then adjust the pH of the solution, and then add the characteristic chromogenic agent to carry out the extraction and color reaction. Within the measurement range, the degree of color change is proportional to the total mercury concentration in the water sample. By measuring the degree of color change, the The total mercury content in the water sample can be calculated. Therefore, according to the data, it can be checked whether the mercury in the water exceeds the standard and whether it is harmful to the human body.