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苏州河底泥重金属形态分析

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Speciation of heavy metals in surface sediments from Suzhou Creek
Nine elements (As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Zn) in sediment samples at 7 sites (Site 1-7) from Suzhou Creek in Shanghai were analyzed with the Community Bareau of Reference (BCR) (sequential extraction (SE)) protocol and simultaneously extracted metals (SEM)/acid volatile sulfide (AVS) procedure to assess the metal bioavailability and toxicology in this area. The results showed that the BCR extraction can be utilized as an additional tool with the AVS method for assessing the potential bioavailability and toxicity of metals in sediments. Pollution from S5 (Site 5) was more severe than from other sites, especially Pb, Cu and Zn. Among all the sites, more than 80% of the total concentration of Fe existed in the residual fraction, As, Cr, Mn also dominated in the residual fraction (more than 50%). While Cd, Ni and Zn (more than 35%) were mainly in the non-stable phase. Cu had a strong affinity with oxidizable phase and Pb varied from site to site. The SEM/AVS ratio was less than one in these sediments and results implied that the majority of Zn and Ni (＞ 40%) were bound to AVS.In contrast, Pb, Cu and Cd were little bound to AVS due to their low ration of SEM-Pb, Cu, Cd to corresponding total concentration and relatively high porewater concentration.

surface sediments, sequential extraction (SE), bioavailability, simultaneously extracted metals (SEM), acid volatile sulfide (AVS).

陈炜、钱光人、LIM Teik Thye、CHUI Peng-cheong

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College of Environmental Engineering, Shanghai University, Shanghai 200072, P. R. China

School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798

surface sediments, sequential extraction (SE), bioavailability, simultaneously extracted metals (SEM), acid volatile sulfide (AVS).

上海市科委资助项目国家高技术研究发展计划(863计划)Shanghai Leading Academic Discipline Project

04DZ12030-32005AA60101005T0105

2007

上海大学学报(英文版)
上海大学

上海大学学报(英文版)

影响因子：0.196
ISSN：1007-6417
年,卷(期)：2007.11(4)
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