Metal and metalloid contaminant availability in Yundang Lagoon sediments, Xiamen Bay, China, after 20 years continuous rehabilitation.
Metal and metalloid contaminant availability in Yundang Lagoon sediments, Xiamen Bay, China, after 20 years continuous rehabilitation.
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DOI：
10.1016/j.jhazmat.2009.10.117
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发表时间：
2010-03
影响因子：
13.6
通讯作者：
Cuixue Chen;Yinghua Lu;J. Hong;M. Ye;Yuanpeng Wang;Haoliang Lu
中科院分区：
文献类型：
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作者：
Cuixue Chen;Yinghua Lu;J. Hong;M. Ye;Yuanpeng Wang;Haoliang Lu
对厦门湾湖连续整治20年后的沉积物污染状况进行了研究。采用改进的BCR分馏方案对沉积物中的颗粒态金属和类金属进行了分离。并采用Håkanson指数法对这些污染物的潜在环境风险进行了评价。结果表明，沉积物中Cu、Pb、Zn、Cr、Ni、Mn、Ag、As、Se等元素均受到轻度污染。Mn的主要部分（30-46%）与酸溶性部分强烈相关。铜（Cu）、铬（Cr）和镍（Ni）表现出显著的可氧化部分（从22%至32%），铅（Pb）、铬（Cr）、砷（As）、锌（Zn）、硒（Se）和银（Ag）在残余相中表现出相当大的浓度（>50%）。环境风险评价结果表明，湖水体污染程度为中度污染，污染物的排序为As>Ni>Pb>Cu>Cr>Zn。重要的是，虽然这些结果表明，在沉积物中的重金属浓度也高于沉积物质量准则，并可能对这些地区构成潜在的威胁，因此应继续努力修复。
This study is focused on the pollutant level of sediments after 20 years continuous rehabilitation in Yundang Lagoon, Xiamen Bay, one of the most developed harbors in China. The modified BCR fractionation scheme was employed in sediments for the partition of particulating metals and metalloids. Moreover, the potential environment risks of these pollutants were evaluated by using Håkanson indexes. The results showed that the sediments were slightly contaminated by Cu, Pb, Zn, Cr, Ni, Mn, Ag, As and Se. A major portion (30–46%) of Mn was strongly associated with the acid soluble fraction. Copper (Cu), Cr and Ni exhibit significant oxidisable fraction (from 22 to 32%), Pb, Cr, As, Zn, Se and Ag showed considerable concentration (>50%) in the residual phase. Environment risk evaluation showed that the pollution in Yundang Lagoon is moderate and the ranking of the contaminants followed the order: As>Ni>Pb>Cu>Cr>Zn. Importantly, though these results indicate that the concentrations of heavy metals in sediments here are also higher than the sediment quality guidelines and may pose a potential threat to these areas and so the efforts in remediation should be continued.