西湖北里湖沉积物磷形态分布及其与间隙水磷的关系  

Distribution of phosphorus species in the sediment of Beili Lake and their relationships with phosphorus concentrations in pore water

作　　者：鲁佳妮[1] 董春颖[1] 刘静静[1] 孙培德[1] 

机构地区：[1]浙江工商大学环境科学与工程学院,浙江杭州310012

出　　处：《环境污染与防治》2012年第12期35-40,共6页Environmental Pollution & Control

基　　金：国家水体污染控制与治理科技重大专项(No.2009ZX07106-002);浙江省自然科学基金资助项目(No.Y5110314);浙江工商大学校级科研项目(No.X11-05)

摘　　要：杭州西湖是典型的富营养化浅水湖泊。经过环湖截污等工程措施,影响西湖的外污染源得到有效的治理,但西湖仍处于富营养化状态。在外污染源得到控制后,富含营养盐的沉积物成为西湖水质改善的主要限制因子。通过研究西湖北里湖沉积物中磷的赋存形态和丰度、间隙水磷含量垂向时空分布特征,分析沉积物磷形态与间隙水磷含量的相关性,探讨内源磷对西湖北里湖营养盐的贡献作用。结果表明,北里湖沉积物中活性磷含量较低,不同磷形态及其含量在垂向上呈现一定的波动,没有表现出明显的规律。间隙水总可溶性磷(TDP)和PO34-含量随沉积物深度的变化不明显,但其含量总体在垂向上都有先升高后降低的趋势,与沉积物中各形态磷均具有一定的正相关性。因此,沉积物磷对水体富营养化具有一定的贡献。The West Lake is a typical shallow eutrophic lake in China. Some projects such as sewage intercep-tion had been organized, and then outer pollution was controlled. However, the eutrophication level is still progress-ing for West Lake. It has been found that inner source of nutrients is the limited factor for water quality improve-ment. The study on spatial and temporal distribution and abundance of phosphorus in sediment and phosphorus con- centrations in pore water was conducted. The relationship between phosphorus species in sediment and phosphorus concentration in pore water was analyzed. The results showed that the active phosphorus concentration was relatively low in sediment from Beili Lake district, West Lake. The vertical distribution of phosphorus species presented certain fluctuation. There was no obvious distribution characteristic found in this area. The relationship between phosphorus concentrations （total dissolvable phosphorus, PO4^3-） in pore water and depth was not clear. Typically, an increasing trend followed by decreasing was found in this study. Besides, positive relationship between phosphorus concentra-tions in pore water and phosphorus species in sediment was observed from this study. Therefore, phosphorus from sediment makes a contribution to lake eutroohication.

关 键 词：西湖北里湖 沉积物 间隙水 磷形态丰度 

分 类 号：X524[环境科学与工程—环境工程]