内蒙古某电厂周围土壤汞分布特征及其影响因素  

Distribution characteristics and influencing factors of mercury in soil around some coal-fired power plant of Inner Mongolia

作　　者：王道涵[1] 杨亚利[1] 任鹏[1] 黄利民[1] 

机构地区：[1]辽宁工程技术大学环境科学与工程学院,阜新123000

出　　处：《环境工程学报》2015年第12期6135-6140,共6页Chinese Journal of Environmental Engineering

基　　金：(美国)国家地理空气与水保护基金资助项目(GEFC30-14)

摘　　要：研究内蒙古草原两燃煤电厂附近土壤中汞含量分布特征及其与土壤性质的关系。结果表明,48.15%的供试土壤汞含量超出当地土壤汞含量背景上限值,且距电厂越近,汞含量越高。距电厂较远、受污染较小地区的土壤汞含量与土壤理化性质密切相关:土壤p H<8.0时,汞含量随p H值升高而减少,p H>8.0时,趋势相反;土壤有机质与汞含量呈现出正相关性;土壤颗粒越细,对汞的吸附能力越强,汞含量越高,但当颗粒细至粘粒时,随着粘粒含量的增多,汞含量呈现出减少的趋势。The correlations between the mercury distribution characteristics and the property of soils were investigated around two coal-fired power plants in Inner Mongolia grassland. The results indicated that the concentrations of mercury in 48. 15% of the soil samples were higher than local soil background values. Locations near the power plant had higher level of mercury. However,the mercury concentrations of soil samples which were collected far from the power plants were closely related to soil properties. When pH 〈8. 0,the mercury concentrations decreased with the elevated pH values,while the increased trend was detected at pH 〉8. 0. Soil organic matters have positive correlation with mercury level. The mercury adsorption capacity of the soil tended to stronger when the particles of soil were getting finer,which,undoubtedly,increased the concentrations of mercury in soil samples. However,when the particles are as fine as clay,the mercury concentrations tend to decrease with elevated content of cosmid.

关 键 词：燃煤 土壤 汞 影响因素 

分 类 号：X53[环境科学与工程—环境工程]