Arsenic contamination of water supplies. The news is seen continuously in the country and abroad. The contamination was caused both by nature. And the actions of the man himself. When humans get plenty of arsenic can cause acute symptoms such as diarrhea, vomiting, blurred vision, intoxication, etc. But if I get less volume and a longer duration to cause chronic poisoning. Symptoms include skin Cancer and died the study. And research on arsenic contamination. Get more interest in the issue of the effects caused to health. The problem of contamination. And the development of analytical methods, however, to determine preventive measures and should seriously get cooperation from all parties in October 2551 reportedly found arsenic contamination in water sources in southern China makes. people suffered facial swelling, vomiting and blurred vision as several hundred. The cause of the wastewater treatment plant's steel inefficient. When heavy storms Make sewage leak into the environment and community (1) in Bangladesh found that the groundwater was consumed with arsenic contamination exceeding the standard. The mineral resource containing arsenic mixed in plenty. And contaminants leached into the groundwater. In addition, Cambodia, Vietnam, Tibet, Argentina, Chile, Mexico and the northern United States, showed arsenic contamination in groundwater too high. (2), (3) the United States had found arsenic contamination in water by the year 2534 has been contaminated with arsenic district Bioremediation. Province caused by tin mining, which is contaminated with arsenic ore. The mineral separation process Arsenic is separated and the tailings were left without proper management. As a result of arsenic contamination to the water supply of nearby communities (2), and since 2549 the province. Showed arsenic contamination in ground water exceed the standard very high. The monitoring group found that individuals who were in the area. There are some cases of contamination of arsenic in the urine. The cause may be due to contamination of natural and managed the old mines would be inappropriate (4) arsenic, a substance found in nature. The composition of the soil, rocks and minerals found in copper ore, manganese, tin, lead, silver and gold, (2) in groundwater near the ore has high arsenic contamination. Which is contaminated by nature. The contamination by human action. Mines Management is not appropriate. As in the case of the tin mining district Bioremediation arsenic, etc. However, it has many uses as a component of the insecticide. Herbicide Chemical wood treatment Mixed with lead batteries in order to increase efficiency. Mixed with many other elements for coating a digital clock. Or the alloys to Light Emitting Diode (LED), which are components of a new electrode. (2), (5) humans have been exposed to arsenic in the skin. Inhaling dust containing arsenic or arsenic vapors. And eating food or drinking water that has been contaminated. Normally the human body to eliminate arsenic have been released in small amounts in the urine within two days, but if you get just 130 milligrams of arsenic in the intestines and liver damage. Vomiting green and yellow Diarrhea, severe intoxication, delirium and death. If you get less volume and a longer period for many years. Arsenic poisoning can cause chronic arsenic Coast City. (Arsenicosis) symptoms starts from skin irritation as a side and thick. Skin color is darker. The palms and soles of the black majority. Until a skin cancer, lung cancer, kidney cancer, bladder. As well as affect the cardiovascular system and nervous system, and ultimately death. (2) World Health Organization, the quality of water for human consumption should not contain arsenic contamination exceeding 0.01 milligrams per liter or 10 ppb (6), (7), while Thailand's Pollution Control Department. The quality of surface water that will be consumed over the initial treatment and disinfection. Arsenic contamination must not exceed 0.01 milligrams per liter as well (8), but the quality of groundwater for human consumption. The quality of drinking water in sealed containers. And industry standard water Compliance with arsenic contamination up to 0.05 milligrams per liter (9), (10) In addition, arsenic is not a matter that needs to be analyzed. And how to determine the standards to use a device called an Atomic Absorption (8), which is very expensive, time consuming, and there are only a few places in Thailand. Or the use of arsenic field test kits, it is expensive and difficult to buy. The monitoring of contamination in drinking water is the difficulty of the problem. The agencies in the country to focus more. The research is important. Effects of Arsenic Exposure of pregnant women to the expression of genes of the baby. That could affect the occurrence of various diseases. Including cancer later The Chulabhorn Research Institute, (11) the development of diagnostic arsenic portable. University of To make a quick analysis and cost (12) are also research the removal of arsenic in water by adding oxygen to the water (13) or precipitation of arsenic with chlorine compounds and iron chloride. chloride (FeCl3) (14), which will be beneficial to the protection of arsenic in drinking water has increased, however, to minimize the area is contaminated. And surveillance measures in vulnerable areas that may be contaminated with arsenic. Continue to study And development of a modern and appropriate regularly.
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