摘要
以华北某电厂燃煤为例,探讨了煤中微量元素的环境效应评价方法。通过电感耦合等离子体原子发射光谱(ICP-AES)等方法测定了电厂循环流化床炉原煤、飞灰、底灰中F,Pb,Hg,等11种微量元素的含量,通过淋滤实验测得了原煤及底灰中Pb、Hg、Cr等7种微量元素的淋出率,并测定了煤堆附近土壤中Cd、Hg、Cr等6种微量元素的含量,计算出了煤中微量元素对大气、水和土壤环境的污染因子。结果表明,燃煤中元素F、Hg、Se、Cl挥发性较强,燃煤中微量元素对大气环境的综合污染因子达3.5,属重污染。元素Hg、As的淋出率较高,原煤和底灰中微量元素对水环境的综合污染因子分别为0.71和0.88,污染程度属微污染。土壤对Cd、Hg、Pb等元素的富集程度很高,煤中微量元素对土壤环境的综合污染因子为0.98,属微污染。
Taking the coal of a power plant in North China as example,the environmental impact assessment method of trace elements in coal was studied. 11 trace elements of F,Pb,Hg in raw coal,fly ash,bottom ash of the CFB combustor in the power plant were determined by the method of ICP-AES. The leached rates of 7 trace elements of Pb,Hg,Cr in the coal and bottom ash were determined by leaching test. The contents of 6 trace elements of Cd,Hg,Cr in the soil near the coal dump were also tested. Then the atmospheric pol...
出处
《环境科学与技术》
CAS
CSCD
北大核心
2010年第10期179-182,189,共5页
Environmental Science & Technology
基金
国家质检总局科技计划项目(20061K058)
关键词
煤
微量元素
环境效应
污染因子
coal
trace element
environmental impact
pollution index
