Mercury and other metal and metalloid soil contamination near a Pb/Zn smelter in east Hunan province, China
Mercury and other metal and metalloid soil contamination near a Pb/Zn smelter in east Hunan province, China
复制标题
中国湖南省东部铅锌冶炼厂附近的汞及其他金属和非金属土壤污染
DOI：
10.1016/j.apgeochem.2010.11.014
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发表时间：
2011-02-01
影响因子：
3.4
通讯作者：
Wang, Jianxu
中科院分区：
文献类型：
--
作者：
Li, Zhonggen;Feng, Xinbin;Wang, Jianxu
对中国湖南省大型铅/锌冶炼厂附近的菜地和稻田中污染物金属（Hg、Pb、Zn、Cd、Cu）和类金属（As）的空间分布进行了调查。距冶炼厂4公里处土壤污染严重，Hg、Pb、Zn、Cd、Cu和As最高浓度分别高达2.89、1200、3350、41.1、157和93 mg kg(-1)。土壤金属和砷的浓度随着主导风向的距离而降低。单因素评价显示，Hg、Pb、Zn、Cd 污染程度最严重，Cu、As 污染程度较轻。潜在生态风险评估结果表明，4公里半径范围内的土壤存在高风险，每种污染物的贡献计算如下：镉（70.0%）、汞（19.4%）、铅（4.8%）、砷（3.0%）、铜（1.7%）和锌（1.1%）。附近城市公园的森林土壤也受到冶炼活动造成的大气沉积的影响。土壤剖面显示污染物主要积累在上20厘米层。表土受 Hg、Pb、Zn、Cd、Cu 和 As 污染应考虑修复。 (C) 2010 Elsevier Ltd. 保留所有权利。
The spatial distributions of contaminant metals (Hg, Pb, Zn, Cd, Cu) and a metalloid (As) in vegetable plots and paddy fields located near a large scale Pb/Zn smelter in Hunan province, China, were investigated. Soil located 4 km from the smelter was severely contaminated, with maximum concentrations of Hg, Pb, Zn, Cd, Cu and As as high as 2.89, 1200, 3350, 41.1, 157 and 93 mg kg(-1), respectively. Concentrations of soil metal and As decreased with distance in the dominant wind direction. Single-factor assessment indicated pollution levels of Hg, Pb, Zn and Cd were most severe, while pollution levels for Cu and As were less severe. Results from a potential ecological risk assessment indicated high risk associated with the soil within a 4 km radius, with the contribution for each contaminant calculated as follows: Cd (70.0%), Hg (19.4%), Pb (4.8%), As (3.0%), Cu (1.7%) and Zn (1.1%). The forest soil in the nearby city park was also affected by the atmospheric depositions from smelting activities. Soil profiles demonstrated the pollutants were mostly accumulated in the upper 20 cm layer. Contamination of the topsoil with Hg, Pb, Zn, Cd, Cu and As indicated remediation should be considered. (C) 2010 Elsevier Ltd. All rights reserved.