钱塘江富阳—杭州段沉积物磷的赋存形态分析  

Phosphorus species in sediment of the Fuyang-Hangzhou section of Qiantang River

作　　者：沈小东[1] 申开丽[2] 杨强[1] 冯宁[1] 马嵩[2] 林琦[2] 

机构地区：[1]杭州市环境保护科学研究院,浙江杭州310014 [2]浙江大学环境与资源学院,浙江杭州310029

出　　处：《环境污染与防治》2007年第9期678-681,共4页Environmental Pollution & Control

摘　　要：研究了钱塘江富阳—杭州段10个采样点表层沉积物中TP、各组分磷的含量分布以及沉积物有机质和粒径对磷分布情况的影响。结果表明,钱塘江富阳—杭州段表层沉积物中的TP为594.76～1 463.06 mg/kg,平均为940.24 mg/kg。NaOH提取态磷（NaOH-P）是污染河段无机磷（IP）的主要赋存状态。除个别采样点外,有机磷（OP）在TP中所占的比例相对较低。钱塘江富阳—杭州段沉积物TP以及赋存状态与沉积物粒度组成及有机质含量有显著的相关关系,沉积物中细颗粒越多,有机质含量越高,其TP也就越高。污染河段磷素增加主要造成NaOH-P升高,因此可以判断河段释磷潜力与污染有关。Total phosphorus （TP）, inorganic phosphorus （IP） and organic phosphorous （OP） present in 10 surface sediment samples （one each from the south/north bank of 5 sampling points） of the Fuyang-Hangzhou section of Qiantang River were measured. TP in sediments averaged 940.24 mg/kg （594.76 to 1 463.06 mg/kg） ; there were more IP than OP in all samples. Except for 1 sample taken at the point of relatively low organic pollution, the IP species were mostly extractable by NaOH （NaOH-P）, which was soluble than the other IP form extractable by HCl （HCl-P）. TP was most closely related to the sendiment＇s particle size and followed by its organic content; a higher TP was found in the sediment sample with a higher organic content and/or a higher fraction of fine particles. Organic con- tamination of river will result in more release of TP from the sediments.

关 键 词：TP 无机磷 有机磷 沉积物 钱塘江 

分 类 号：X52[环境科学与工程—环境工程]