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锌冶炼-氯碱生产复合污染区土壤汞的空间分布
引用本文:郑冬梅,王起超,郑娜,张少庆.锌冶炼-氯碱生产复合污染区土壤汞的空间分布[J].土壤通报,2007,38(2):361-364.
作者姓名:郑冬梅  王起超  郑娜  张少庆
作者单位:1. 中国科学院,东北地理与农业生态研究所,吉林,长春,130012;中国科学院,研究生院,北京,100039
2. 中国科学院,东北地理与农业生态研究所,吉林,长春,130012
基金项目:中国科学院知识创新工程项目
摘    要:研究了锌冶炼-氯碱生产复合区土壤汞污染及其空间分布特征。区域土壤汞污染严重,表层土壤汞含量为0.055~14.575 mg kg-1,平均值为1.435 mg kg-1,高于下层,高于区域土壤背景值38倍。土壤表层汞含量以锌冶炼厂和氯碱厂及其附近为中心,向外围辐散降低,呈双中心分布;锌厂周围山地土壤汞含量随海拔高度的增加而升高,表层土壤汞分布模式显示出大气汞沉降作用的影响。运用Mu ller地累积指数进行风险评价得出,土壤100%处于汞污染风险中,其中中等污染-强污染、强污染-极严重污染、极重污染,分别占26.3%、21.1%、32.9%。锌冶炼-氯碱复合区是我国汞污染最重的地区之一,其生态风险、人群健康风险应引起重视。

关 键 词:土壤汞  空间分布  大气沉降  锌冶炼  氯碱生产
文章编号:0564-3945(2007)02-0361-04
修稿时间:2006年3月23日

The Spatial Distribution of Soil Mercury in the Area Suffering Combined Pollution by Zinc Smelting and Chlor-alkai Production
ZHENG Dong-mei,WANG Qi-chao,ZHENG Na,ZHANG Shao-qing.The Spatial Distribution of Soil Mercury in the Area Suffering Combined Pollution by Zinc Smelting and Chlor-alkai Production[J].Chinese Journal of Soil Science,2007,38(2):361-364.
Authors:ZHENG Dong-mei  WANG Qi-chao  ZHENG Na  ZHANG Shao-qing
Abstract:The characteristics of spatial distribution of soil mercury in the area suffering zinc smelting and chlor-alkai production were studied.The mercury content in surface soil layer was 0.055-14.575 mg/kg,with the mean value 1.435 mg/kg,which was higher than that in the lower layer and 38 times higher than that of the regional background value.Therefore,the regional soil was heavily polluted by mercury.The mercury content in surface soil layer decreased radiately around the dual centers of the factory for zinc smelting and chloralkai production.The soil mercury content in the mountainous area around the factory increased upwardly with the increase of altitude.The distributional pattern of soil mercury content manifested the influence of atmosphere disposition of mercury.Using geo-accumulation index developed by Muller,we found that all the 76 samples were in danger of mercury pollution and the percentage of the middle-heavily polluted,the heavily-most heavily polluted and the most heavily polluted were 26.3,21.1 and 32.9%,respectively.The area is one of the areas suffering the most heavy mercury pollution and we should pay more attention to its ecological and public health risks.
Keywords:Soil mercury  Spatial distribution  Atmosphere deposition  Zinc smelting  Chlor-alkali production
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