What are the disadvantages of phosphorus laundry detergent?

Phosphorus-containing washing powder is the addition of 15% polyphosphate to the washing powder, which can effectively decompose the dirt in the clothes. The phosphorus-containing washing powder for cleaning clothes uses phosphate as the main auxiliary agent. After washing, the sewage is discharged into the rivers and lakes. The phosphorus content in the water increases, and the water quality tends to be eutrophic, resulting in the proliferation of various algae and aquatic plants, the turbid water quality, and the lack of oxygen in the water body, causing the death of aquatic organisms such as fish and shrimp. 1. Phosphorus-containing washing powder- The ingredients of phosphorus-containing washing powder need to be added with auxiliaries to play a better role. The phosphorus-containing auxiliary is sodium tripolyphosphate, also known as pentasodium. It can chelate water Calcium and magnesium cause hard metal ions and soften the washing water. In addition, pentasodium can improve the alkalinity of the washing liquid, thereby improving the buffer reduction performance of the washing liquid. Pentasodium has an emulsifying effect on greasy dirt and solid It has the effect of dispersing and peptizing the soil, and swelling and solubilizing the protein soil. The result of these comprehensive effects greatly improves the decontamination efficiency of the detergent. Pollution. Now a new product that can completely replace pentasodium has been developed. Its chemical name is sodium tripolyphosphate. According to the report of global water quality monitoring, about 30% to 40% of lakes and reservoirs in the world are currently eutrophic. In my country, many rivers and lakes, such as the Yangtze River, Huaihe River, Taihu Lake, Chaohu Lake, etc., have eutrophication problems to varying degrees. According to experts' investigation of water pollution in Chaohu Lake, the phosphorus content in the water easily exceeds the standard 3.4 times, and the increase in phosphorus content is all due to phosphorus-containing washing powder. 70.8% of the phosphorus in the water of Xuanwu Lake in Nanjing comes from domestic sewage; one of the main reasons for the outbreak of cyanobacteria in Taihu Lake is that the phosphorus content in the water increases sharply due to the discharge of washing powder. Washing powder was originally a clean thing, but now it has become the culprit of pollution.

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