Water and sewage pollution from industrial and domestic activities has become a serious problem. Advances in industries such as mining, steel, and metal plating have allowed water contaminated with harmful metals to enter nature. These dangerous elements enter the human food chain through direct drinking of polluted water or through plants and animals, causing irreversible effects on the human body. For this reason, the use of chelating compounds, led by tetrasodium edta, has received more and more attention. Edta 4na is widely used in water and wastewater treatment due to its abundance and cost-effectiveness. This compound can absorb and neutralize metal ions such as lead, cadmium, mercury, and cobalt. The combination of edta and metal ions is then removed from the water by methods such as reverse osmosis, and the purified water returns to nature or the cycle of use.