With the increasing emphasis and strengthening of environmental protection work, how to eliminate phosphorus pollution is becoming a topic of growing concern. 1、 The source of phosphorus pollution collection (1) is industrial wastewater. The wastewater from factories such as food processing, fermentation, and detergent production contains a large amount of phosphorus. （2） The phosphorus in domestic sewage mainly comes from the extensive use of phosphorus containing synthetic detergents. （3） Phosphorus containing fertilizers and pesticides are often extensively used in rural areas of China to increase crop yields. 2、 The hazards of phosphorus (1) The hazards of phosphorus to humans (1) The hazards to the skin: High phosphorus laundry detergent has a direct irritant effect on the skin, causing a burning and painful sensation. After washing, wearing clothes on the body can sometimes cause skin itching. High phosphorus laundry detergent has become a source of irritation for common skin diseases such as contact dermatitis and diaper rash in infants. (2) Harm to the central nervous system: There is an important neurotransmitter called acetyl esterase in the human body, and organophosphates can inhibit esterase, preventing it from decomposing acetyl esterase and causing a large accumulation of acetyl esterase in the central nervous system, leading to poisoning Severe cases may even lead to death. (3) Low dose organophosphate pesticides can not only cause chronic poisoning in humans, but may also pose hazards such as carcinogenesis and teratogenicity. （2） The harm of phosphorus to marine organisms. Most marine organisms are highly sensitive to organophosphate pesticides, and pesticide concentrations that are unresponsive to some resistant insects can quickly cause death to marine organisms.