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滇池、红枫湖沉积物中总磷、分态磷及生物硅形态与分布特征

吴峰炜;汪福顺;吴明红;尹然   

  1. 上海大学环境与化学工程学院, 上海 201800
  • 收稿日期:2008-04-10 修回日期:1900-01-01 出版日期:2009-01-10 发布日期:2009-01-10

Distributions of total phosphorus, phosphorus fractions, and biogenic silica in Dianchi Lake and Hongfeng Lake sediments.

WU Feng-wei;WANG Fu-shun;WU Ming-hong;YIN Ran   

  1. College of Environment and Chemical Engineering, Shanghai University, Shanghai 201800, China
  • Received:2008-04-10 Revised:1900-01-01 Online:2009-01-10 Published:2009-01-10

摘要: 通过对不同富营养化程度的湖泊(滇池及红枫湖)沉积柱剖面进行不同形态磷以及生物硅含量分析,对比了磷及生物硅的沉积分布特征,并探讨了其与湖泊富营养化演化的关系。结果表明:滇池沉积物中碎屑磷和有机磷在总磷中占50.5%~80.8%,是影响总磷趋势的主要原因;红枫湖中有机磷对总磷的贡献较大,占总磷的53%~60.9%;且两湖各形态磷均随深度的增加而减少;两湖总磷、有机磷、铝磷以及滇池沉积柱中的碎屑磷等的快速增长,表明其主要来源于人为污染;生物硅含量呈现从下层沉积物向上逐渐增加,在上层沉积物中逐渐减少的趋势;总磷、有机磷、铁结合态磷、铝结合态磷、弱结合态磷以及生物硅都能较好地反映富营养化污染的演变和现状。

关键词: Fertilization, Phosphomonoesterase, Phosphodiesterase, Phosphotriesterase, Meadow brown soil

Abstract: Sediment cores were taken from two lakes (Dianchi Lake and Hongfeng Lake) with different degree of eutrophication to analyze the contents of total phosphorus (TP), phosphorus (P) fractions, and biogenic silica, compare their profile distribution characteristics, and approach the relationships of these distribution characteristics with the evolution of eutrophication. The results showed that the residual-P and organic-P (Or-P) in Dianchi Lake accounted for 50.5%-80.8% of TP, being the main fractions of the TP, while the Or-P in Hongfeng Lake accounted for 53%-60.9% of TP, contributing more to the TP. The phosphorus fractions in the two lakes had a trend of decreasing with increasing sediment depth. The rapid increase of TP, Or-P, and Al-P contents in the two lakes and of residual-P in Dianchi Lake revealed that the P pollution of the lakes was mainly from the people’s living and production activities. The biogenic silica content in the sediments represented increasing from the bottom to the top, and decreasing in the top. The distribution characteristics of Or-P, Al-P, Fe-P, residual-P, and biogenic silica could better reflect the evolution and the present status of lake eutrophication.

Key words: Fertilization, Phosphomonoesterase, Phosphodiesterase, Phosphotriesterase, Meadow brown soil