首页|期刊导航|中国地球化学学报（英文版）|Geochemical features of heavy metals in core sediments of northwestern Taihu Lake, China
中国地球化学学报（英文版）2005，Vol.24Issue(1)：73-81,9.
Geochemical features of heavy metals in core sediments of northwestern Taihu Lake, China
Geochemical features of heavy metals in core sediments of northwestern Taihu Lake, China
摘要
Abstract
Sequential core sediments from northwestern Taihu Lake in China were analyzed for grain size, organic carbon and heavy metal content. The sediments are composed of organic-poor clayey-fine silts. The chemical speciations of Cu, Fe, Mn, Ni, Pb, and Zn were also analyzed using the BCR sequential extraction procedure. Cu, Fe, Ni, and Zn are mainly associated with the residue fraction; Mn is concentrated mainly in exchangeable/carbonate fraction and residue fraction; and Pb mainly in Fe/Mn oxide fraction and organic/sulfide fraction. The exchangeable/carbonate fractions of Cu, Fe, Ni, Zn and Pb are lower. The fractions of Ni, Pb and Zn bound to the Fe/Mn oxide have significant correlations with reducible Mn; the organic/sulfide fractions of Cu, Mn, Ni, Pb, and Zn have significant correlations with TOC. The extractable fractions of Cu, Mn, Ni, Pb, and Zn are high at the top 4 cm of the core sediments as compared to those in the deeper layers, showing the anthropogenic input of heavy metals is due to rapid industrial development. The heavy metal pollution history of the sediments has been recorded since the late 1970s, determined by the result of 137Cs dating.关键词
heavy metal/chemical speciation/sequential core sediment/Taihu LakeKey words
heavy metal/chemical speciation/sequential core sediment/Taihu Lake引用本文复制引用
LIU Enfeng,SHEN Ji,LIU Xingqi..Geochemical features of heavy metals in core sediments of northwestern Taihu Lake, China[J].中国地球化学学报（英文版）,2005,24(1):73-81,9.基金项目
The research project was supported jointly by the Knowledge Innovation Engineering Projects of the Chinese Academy of Sciences and Nanjing Institute of Geography & Limnology (KZCX1-SW-12-I , CXNIGLASA02-05 ). （KZCX1-SW-12-I , CXNIGLASA02-05 ）
