黄石市大气降尘中重金属污染特征与评价  

Distribution Characteristics and Risk Assessment of Heavy Metals in Atmospheric Dustfall of Huangshi City,China

作　　者：姚瑞珍[1] 张勇 王亚良[1] 张家泉[1,2] 闫桂华[1] 吴枫[2] 肖文胜[1] 

机构地区：[1]湖北理工学院环境科学与工程学院矿区环境污染控制与修复湖北省重点实验室,湖北黄石435003 [2]中国科学院地球环境研究所,西安710075

出　　处：《地球与环境》2016年第2期212-218,共7页Earth and Environment

基　　金：湖北省教育厅科学技术研究项目(B2013065;Q20134404);湖北理工学院优秀青年科技创新团队资助计划项目(13xtz07);湖北省大学生创新创业训练计划(201410920031)

摘　　要：利用X射线荧光光谱法分析了黄石城区2012年5月大气降尘重金属(Cr、Mn、Co、Cu、Zn、Pb)含量。结果表明:降尘中Cr、Mn、Co、Cu、Zn、Pb元素的浓度均值分别为480.08mg/kg、814.87mg/kg、15.76mg/kg、649.07mg/kg、7622.20mg/kg、360.27mg/kg;地积累指数、富集因子、潜在生态风险系数均指示Mn和Co基本无污染,Zn、Cu污染最为严重;其中Zn、Cr的污染规律为工业区>商业区>文教区,Cu与Pb则以文教区污染最为严重;健康风险评价指出Cr、Co无致癌风险,Pb对人体的健康危害最大,尤其是对儿童。Concentrations of heavy metals（ Cr,Mn,Co,Cu,Zn,and Pb） in atmospheric dust of Huangshi City,China during May2011,were measured by X-ray fluorescence spectrometry. Results show that mean concentrations of Cr,Mn,Co,Cu,Zn,and Pb in atmospheric dust were 480. 08 mg / kg,814. 87 mg / kg,15. 76 mg / kg,649. 07 mg / kg,7 622. 20 mg / kg,and 360. 27 mg / kg,respectively. Geoaccumulation index,enrichment factors and potential ecological risk index all indicate that atmospheric dust were not polluted by Mn and Co,but seriously polluted by Zn and Cu. The order of Zn and Cr amounts in atmospheric dust was industrial districtcommercial districteducational district,and educational district was the worst polluted by Cu and Pb. Healthy risk assessment shows that Cr and Co have no carcinogenic risk,but Pb was the most serious for human body,especially for children.

关 键 词：大气降尘 黄石市 重金属 分布特征 风险评价 

分 类 号：X131.1[环境科学与工程—环境科学]