广东某硫酸废渣堆渣场周围土壤铊污染的地累积指数评价  

Applying the Index Geoaccumulation to Assessment of Soil Thallium Pollution in Soil Around a Thallium-containing Slag Pile Site near a Sulphuric Acid Plant in Guangdong Province

作　　者：刘敬勇[1] 常向阳[2] 涂湘林[3] 陈南[2] 付善明[2] 陈永亨[2] 

机构地区：[1]广东工业大学环境科学与工程学院,广东广州510006 [2]广州大学环境科学与工程学院,广东广州510006 [3]中国科学院广州地球化学研究所,广东广州510640

出　　处：《土壤通报》2010年第5期1231-1236,共6页Chinese Journal of Soil Science

基　　金：教育部"新世纪优秀人才支持计划"(NCET-07-0219);教育部重点项目(207083);国家自然科学基金项目(40772201);国家基金委-广东省自然科学联合基金重点项目(U0633001);广东工业大学校青年基金项目(072054)资助

摘　　要：对广东某含铊黄铁矿冶炼废渣堆渣场周围土壤铊污染状况进行了研究与评价。结果表明,废渣周围土壤已受到了明显的铊污染,污染物主要集中在土壤0~16.5 cm范围,并且表现出沿垂直方向向下迅速降低的特点;土壤表层的铊吸附量未达到饱和状态,铊污染物将继续在土壤表层发生累积作用。地累积指数法评价的结果是：废渣下伏土壤0~6 cm范围铊达到中度污染水平,而在土壤约14.5 cm以下没有受到铊的污染;相对于下伏土壤,废渣外围土壤污染更为严重,其中土壤0~1cm铊已经达到中~强度污染,土壤1~5 cm范围铊为中度污染,而在土壤约14.5 cm以下没有受到铊的污染。地质累积指数法应用于土壤铊污染评价是可行的,但是不能表明铊在土壤中存在状态、迁移能力以及生物有效性。An investigation was carried out and to assess thallium pollution on soils around a thallium-containing slag pile site near a Sulphuric Acid Plant in Guangdong Province.It was found that thallium pollutants were mainly concentrated in the surface layer（0-16.5 cm） of the soil and showed a rapidly decreasing trend with the soil vertical depth.But the adsorption capability of Tl was not saturated for the surface soil layer.As a result,the thallium pollutant accumulation could be more and more serious in the future.Applying Igeo method,we concluded that of the degree of Tl contamination was more serous in exterior profile than that of the inner profile under slag.Tl pollution in the deeper soil layer was much minor than that of the surface layer（0-6 cm）,and for the exterior soil,the soil layer at 1cm and 5cm depth showed strong,middle contamination,and the deeper soil（14.5 cm） showed no contamination,respectively.The method of Igeo to evaluate the Tl pollution in soil is suitable,but this method can not interpret the phases,migration and bioavailability of Tl in soil.

关 键 词：铊 土壤污染 地累积指数法 硫酸厂废渣 广东 

分 类 号：X825[环境科学与工程—环境工程]