农业环境科学学报Issue(6)：1189-1196,8.DOI:10.11654/jaes.2014.06.020
长江口滨岸重金属含量、形态及其分布特征
Contents, Forms and Distributions of Heavy Metals in Surface Water and Sediments from Yangtze Estuary
摘要
Abstract
Contents, forms and distributions of heavy metals(Cd, Cr, Cu, Hg, Ni, Pb and Zn)and metalloid As in surface water and sedi-ments from the nearshore zones of the Yangtze Estuary were studied. Concentrations of all heavy metals and metalloid As in the surface wa-ter were lower than the Class I levels of GB 3838-2002 Surface Water Environment Quality Standards, whereas the mean concentrations of all metals in the sediments were higher in 2012 than in 2007. The concentrations of most metals in the sediments were higher from the south-ern than from the northern branch, due to more inputs of sewage and pollutants. The median concentrations of As, Cr and Ni in the sedi-ments were higher than the threshold effect levels(TEL), implying potential ecological risks. Fractionations showed that As, Cr and Ni in the sediments were mainly present in the residual fraction. High Cd in the exchangeable and carbonate bound fractions indicated a higher eco-logical risk. There were obviously positive correlations between all metals with an exception of Hg and As. All metals had positive correla-tions with active iron and aluminum oxides and Mn except Zn, and with TOC except Hg.关键词
长江口/沉积物/重金属/形态/生态风险Key words
Yangtze estuary/sediment/heavy metals/fractions/ecological risk分类
资源环境引用本文复制引用
李亭亭,王京刚,王颖,李丽芳,尹世磊..长江口滨岸重金属含量、形态及其分布特征[J].农业环境科学学报,2014,(6):1189-1196,8.基金项目
国家重点基础研究计划（973）项目（2010CB429-003）；国家自然科学基金（21177013）；国家国际科技合作专项项目 （）
