The distribution, enrichment and source of potential harmful elements in surface sediments of Bohai Bay, North China
The distribution, enrichment and source of potential harmful elements in surface sediments of Bohai Bay, North China
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DOI：
10.1016/j.jhazmat.2010.07.005
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发表时间：
2010-11-15
影响因子：
13.6
通讯作者：
Zhang, Ying
中科院分区：
文献类型：
--
作者：
Duan, Liqin;Song, Jinming;Zhang, Ying
对渤海湾表层沉积物进行了地球化学研究，分析了潜在有害元素（PHE：Ge、Mo、In、Sn、Sb、Te、Tl、Bi、V）浓度、运移沉积、富集因素和来源。表层沉积物中锗、Mo、In、Sn、Sb、Te、Tl、Bi 和 V 浓度分别为：1.43-1.71、0.52-1.43、0.04-0.12、2.77-4.14、1.14-2.29、0.027-0.085、0.506-0.770、分别为0.27-0.63和70.35-115.90μg/g。总 PHE 浓度的分布以及顺序提取分析表明，PHE 主要是由于大陆风化通过河流和大气输送和沉积输送到海湾的自然输入造成的。然而，高含量的 Mo、Sb、Te、Bi 和 V 出现在非残留部分中，表明除了自然输入之外还存在一些人为输入。除了来源之外，PHE 的分布还受到物理、化学和生物过程耦合的影响。计算每个站点每种元素的富集因子（EF），以评估每个站点的污染元素和污染程度。结果显示，EF 一般低于 1.0，尤其是 Ge、Mo、In、Sn、Tl 和 V；然而，EF 较高（>1.5），特别是 Sb、Te 和 Bi，表明存在中度污染。 (C) 2010 Elsevier B.V. 保留所有权利。
A geochemical study of Bohai Bay surface sediments was carried out to analyze the potential harmful element (PHE: Ge, Mo, In, Sn, Sb,Te, Tl, Bi and V) concentrations, transportation and deposition, enrichment factors and sources. Germanium, Mo, In, Sn, Sb, Te, Tl, Bi and V concentrations in the surface sediments were: 1.43-1.71, 0.52-1.43, 0.04-0.12, 2.77-4.14, 1.14-2.29, 0.027-0.085, 0.506-0.770, 0.27-0.63 and 70.35-115.90 mu g/g, respectively. The distributions of total PHE concentrations, together with sequential extraction analyses, showed that the PHEs were mainly due to natural inputs from the continental weathering delivered to the bay by rivers and atmospheric transportation and deposition. However, high Mo, Sb, Te, Bi and V occurred in non-residual fractions, suggesting some anthropogenic inputs in addition to the natural inputs. Besides sources, the distributions of PHEs were influenced by the coupling of physical, chemical and biological processes. Enrichment factor (EF) was computed for each site for each element in order to assess the polluting elements and the degree of pollution at each site. Results revealed that the EFs were generally lower than 1.0, particularly for Ge, Mo, In, Sn, Tl and V; however, the EFs were higher (>1.5), particularly for Sb, Te and Bi, revealing moderate contamination. (C) 2010 Elsevier B.V. All rights reserved.