煤矿城市典型区域土壤重金属分布特征及其变化  

Distribution and temporal trend of heavy metals in soils from typical areas in a coal-mining city

作　　者：刘薇 李媛[1] 李晶晶 唐阵武 LIU Wei;LI Yuan;LI Jingjing;TANG Zhenwu(School of Chemical Engineering,Beijing University of Chemical Technology,Beijing 100029;College of Life and Environmental Sciences,Minzu University of China,Beijing 100081)

机构地区：[1]北京化工大学化学工程学院,北京100029 [2]中央民族大学生命与环境科学学院,北京100081

出　　处：《环境污染与防治》2021年第8期984-989,共6页Environmental Pollution & Control

基　　金：国家重点研发计划项目(No.2018YFC1900104)。

摘　　要：以煤矿城市淮南的原煤开采区和燃煤电厂周边土壤为例,研究土壤中8种重金属分布特征。结果表明:(1)原煤开采区土壤中Cd、Hg和Pb的中位数分别比相应土壤背景值高0.8、0.6、0.3倍,燃煤电厂周边土壤中Cd和Pb中位数分别是相应土壤背景值的2.5、1.3倍,其他重金属含量与土壤背景值相当。(2)除主要来源于原煤开采和燃煤外,交通排放也是这些区域土壤重金属的重要来源。(3)整体上,研究区土壤中重金属含量明显低于先前研究,表明实施的系列污染控制措施对于减轻当地土壤重金属污染可能具有一定效果,但仍需进一步研究。Soils of raw coal mining area and coal-fired power plant surrounding in a coal-mining city Huainan were used as examples to study the distribution characteristics of eight heavy metals.The results showed that:(1)the median values of Cd,Hg and Pb in the soil of the raw coal mining area were 0.8,0.6 and 0.3 times higher than the corresponding soil background values,respectively,and the median values of Cd and Pb in the soil of coal-fired power plant surrounding were 2.5 and 1.3 times higher than the corresponding soil background values,respectively,while the contents of other heavy metals were comparable to the soil background values.(2)In addition to being mainly derived from raw coal mining and coal combustion,traffic emissions were also an important source of heavy metals in the soils of the areas.(3)Overall,the heavy metal concentrations in the soils of the studied area were significantly lower than those in previous studies,suggesting that the series of pollution control measures implemented might be effective in mitigating local soil heavy metal pollution,but further studies were still needed.

关 键 词：土壤 重金属 原煤开采 燃煤电厂 分布 

分 类 号：X53[环境科学与工程—环境工程]