洪泽湖沉积物中磷的形态研究

采用改进的七步连续提取法对洪泽湖9个采样点沉积物中的各形态磷进行了分析,结果表明,所测洪泽湖沉积物中总磷(TP)含量范围为580.7～1 447.7 mg/kg,无机磷(IP)是TP的主要部分,占TP含量的64.32％～88.60％；有机磷(0P)占TP的11.40％～35.68％.受河流注入和人为活动的影响,TP、I...

Forms of Phosphorus in Sediments from Hongze Lake

An improved method called seven-step sequential extraction was used to analyze all the forms of phosphorus in sediments from nine sampling sites of Hongze Lake. The results showed that the concentration of total phosphorus （TP） in sediment from Hongze Lake ranged from 580.7 mg/kg - 1 447.7 mg/kg. The main part of TP was inorganic phosphorus （IP） , which contributed 64.32% - 88.60% of TP, while organic phosphorus （OP） accounted for 11.40%- 35.68% of TP. The maximum concentrations of TP, IP and OP were all detected in Linhuai town due to the discharge of river nearby and human activities. The main form of IP was De-P which contributed 23.58% - 55.54% of TP, followed by Fe-P, which contributed 9.97% - 41.33% of TP. The concentrations of Ca-P, Al-P and Ex-P were relatively low, and concentrations of Oc-P were the lowest. The vertical profiles of phosphorus forms were different in sediments from different sampling sites due to the structure and movement of the lake sediment.