Sodium tripolyphosphate itself is non-toxic and has good biodegradability, but phosphorus in sodium tripolyphosphate is an important factor that causes eutrophication of water bodies. As a large amount of phosphorus and nitrogen-containing compounds flow into rivers and other bodies of water, it will cause rapid growth and reproduction of algae and plankton in the water. With the thickening of algae and the thickening of algal layers, the sunlight will not reach the bottom of the algae layer, resulting in bottom algae. Decomposition by death. During the decomposition process, dissolved oxygen is consumed in the water and the concentration of dissolved oxygen in the water is reduced. Certain algae can also produce toxins during the decomposition process, resulting in poisoning, disease, and death of fish and shrimps. This phenomenon is called water eutrophication.
The problem of eutrophication of water and pollution of the environment has attracted the attention of countries all over the world. Since the 1960s, there have been many phenomena of eutrophication of water bodies around the world. The appearance of eutrophication in rivers and lakes is called “blooming” and appears in the ocean as “red tide”. In North America, Lake Erie and Japan’s Lai’ouhaihai have experienced “red tides” many times. In particular, there were 133 red tides in 1971 in the Laiwu Inland Sea in Japan. In 1973, there were 14.28 million dead fish in red tides, and the loss was about 70. Billion yen. To this end, all countries in the world have legislation to control, one of which is to limit the use of phosphorus in detergents. Since the 1980s, there have been many eutrophication phenomena in China's waters. According to statistics, the level of eutrophication of lakes in China currently accounts for 63.6% of all lakes, of which Taihu Lake, Chaohu Lake, Dianchi Lake, West Lake, etc. have been listed by the State Council as a key governance project after the Huaihe River. Since January 1, 1999, the use of phosphorus-containing detergents has been banned in the secondary protection zones in the Taihu Lake area, and the use of phosphorus-containing detergents has been controlled and sold in the tertiary protection zones. In order to ensure the water quality of rivers and lakes, prevent pollution, maintain the ecological balance of the water body, and prevent the occurrence of eutrophication, it is necessary to prohibit the use of detergents containing phosphorus.