长寿湖表层沉积物中磷的赋存形态及生物有效性分析  

Phosphorus Forms and Bioavailability in Surface Sediments of Changshou Lake

作　　者：胡鹏飞[1] 何太蓉[1] 金慧芳[1] 赵恬琛[1] 

机构地区：[1]重庆师范大学地理与旅游学院,重庆400047

出　　处：《水生态学杂志》2012年第1期9-13,共5页Journal of Hydroecology

基　　金：重庆大学三峡库区生态环境教育部重点实验室2007年度访问学者基金项目(KLVF-2007-4);重庆市科委软科学计划项目(CSTC2011CX-rkxA0280)

摘　　要：基于连续提取法对长寿湖15个采样点沉积物中磷的赋存形态进行分析,并探讨磷的生物有效性和评价沉积物的污染性。结果表明:无机磷(IP)是长寿湖表层沉积物总磷(TP)中的主要赋存形态,平均占TP的74.82%,有机磷(OP)只占较小部分;IP中自生钙磷(Ca-P)所占比重最大,各形态磷所占比重大小依次为Ca-P>Fe-P>Detr-P>Ads-P;相关性分析表明,TP的含量及分布主要受到IP的影响,而IP受到Ca-P的控制;长寿湖表层沉积物中潜在生物有效磷的含量为412.13～713.25μg/g,平均占TP的89.98%,具有很强的释磷潜力;长寿湖表层沉积物呈中度污染,应加强监测和治理。Forms, bioavailability and pollution of phosphorus in the surface sediments of fifteen sampling sites from Changshou Lake were analyzed by means of sequential extraction method （SEDEX）. Results showed that the main form of total phosphorus （TP） in surface sediments was inorganic phosphorus （ IP）, which accounted for 74.82% and organic phosphorus （OP） constituted only the minor part. Among different forms of inorganic phosphorus, cal- cium-phosphorus （Ca-P） was the dominant forms, and the order of share of total phosphorus was ： Ca-P 〉 Fe-P 〉 Detr-P 〉 Ads-P. The correlation analysis among different phosphorus forms suggested that the concentrations and distribution of TP were mainly controlled by IP while inorganic phosphorus was affected by Ca-P. Biological phos- phorus in the surface sediments ranged from 412.13 -713.25 μg/g and occupied 89.98% of the total phosphorus, which explained that the surface sediments of Changshou Lake had a strong potential for phosphorus release. The surface sediments of Changshou Lake showed moderate pollution to which the monitoring and management should be strengthened.

关 键 词：沉积物 磷 赋存形态 生物有效性 长寿湖 

分 类 号：X524[环境科学与工程—环境工程]