中山大学学报（自然科学版）Issue(1)：107-113,7.DOI:10.13471/j.cnki.acta.snus.2016.01.019
燃煤电厂周边地区积尘重金属污染特征与健康风险评价
Pollution characteristics and health risk assessment of heavy metals in dust surrounding a coal-fired power plant
摘要
Abstract
The aim of this work was to measure the concentrations of heavy metals in house dust and soil samples as well as study the characteristics and distribution of heavy metal pollution in the surrounding ar-ea of coal-fired power plant in Guangdong Province.The risk assessment of heavy metals in dust was also carried out using US EPA Health Risk Assessment Model.The results revealed that the order of concen-trations of metals was Zn >Mn >Pb >Cu >Cr >As >Cd >Hg.The heavy metal pollution levels of dust were relatively high,which were higher than those in soil to varying degrees.The pollution of Zn,Pb, Cd and Cu in dust was likely to be anthropogenic,mainly due to industrial and traffic sources.However, the pollution of As,Hg and Mn in dust was not obviously anthropogenic.Spatial distribution of heavy metal in dust was clearly affected by soot emissions of power plant.Nemerow Indexes were significantly correlated with local wind direction and frequency,decreased with incremental distance from the power plant.It is evident that the concentrations of Pb,Zn and Hg also decreased with incremental distance from the power plant.Potential health risk for children was significantly higher than for adults.The non-cancer risk of metals was Pb >Mn >Cr >As >Zn >Cu >Hg >Cd,while the carcinogen risk of metals was As >Cr >Pb >Cd.In particular,the non-cancer risk of Pb for children was high,which required more attention.The non-cancer risks of other metals for children were low.Non-cancer risks for adults were ignorable.Carcinogen risks of metals were in an acceptable range,indicating no carcinogenic hazard to children and adults.关键词
燃煤电厂/积尘/重金属/污染特征/健康风险Key words
coal-fired power plant/dust/heavy metal/pollution characteristic/health risk分类
环境科学引用本文复制引用
陈耿,刘军,杨立辉,柯钊跃..燃煤电厂周边地区积尘重金属污染特征与健康风险评价[J].中山大学学报（自然科学版）,2016,(1):107-113,7.基金项目
广东省环保专项资金资助项目 （）
