Distribution characteristics and release contribution of different phosphorus forms in sediments of Jingpo Lake

Jingpo Lake was divided into the northern, central, eastern, western, and southern lake areas. Twenty-three surface sediment sample points and 10 sediment core sample points were installed in Jingpo Lake. The Standards, Measurements and Testing Programme (SMT) method was used to determine total phosphorus (TP), inorganic phosphorus (IP), organic phosphorus (OP), iron/aluminum combined phosphorus (NaOH-P), and calcium combined phosphorus (HCl-P) in the sediment. Researchers have analyzed the sources, spatial distribution characteristics and contribution to phosphorus release of different forms of phosphorus in Jingpo Lake sediments. The results showed that there were three main components in each form of phosphorus in Jingpo Lake sediments, of which component 1 mainly represented domestic sewage and industrial wastewater; main component 2 mainly represented agricultural pollution; main component 3 mainly represented detrital rock and authigenic apatite Stone and phosphorous minerals. The spatial distribution of different forms of phosphorus in Jingpo Lake sediments were greatly affected by the hydrological characteristics and human activities. The phosphorus content of different forms in lake sediments decreased with depth increased. Analyzed the released contribution of different forms phosphorus in sediments, the analysis showed that in a short time scale the phosphorus of sediments was staying mainly in Jingpo lake, but sediments phosphorus had release risks in a longer scale. © 2021, Editorial Board of China Environmental Science. All right reserved.