Phosphorus fractions and distribution characteristics in sediments of Nansi Lake, China, and its main inflow rivers
Phosphorus fractions were studied in the surface sediments of Nansi Lake and its main inflow rivers using the sequential extraction procedure. The phosphorus contents in the sediments of Nanyang Lake, Dushan Lake and the inflow rivers located in the west lake were higher and the total phosphorus （TP） content in the sediments ranged from 571.67 mg. kg - l to 1113.55 mg＂ kg - 1. The concentrations of various contents differed greatly,and the order was Ca-P 〉 OP 〉 Ads-P 〉 Fe-P 〉 A1-P. Significant positive correlations existed between TP and Ca-P, between Ads-P and OP, between Ads-P and Ca-P, and between Ads-P and OP. Negative correlations existed between Fe-P and Ca-P. The correlation between BAP and OP was also significant, and the effective internal phosphorus loads could be calculated roughly by OP. The contents of OP depended largely on the contents of the organic matter in the sediments.
NETL
NSTL
万方数据
维普
