广东某含铊硫酸冶炼堆渣场土壤中重金属的污染特征  

Pollution Character of Thallium(Cd,Pb,Zn) in Profile of Soil Within the Deposed Slag Collected from a Sulphuric Acid Plant in Guangdong

作　　者：刘敬勇[1] 常向阳[2] 涂湘林[3] 陈永亨[2] 陈南[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：《中国环境监测》2008年第2期74-81,共8页Environmental Monitoring in China

基　　金：广东省科技计划项目(2004B33301021);教育部重点项目(207083)

摘　　要：选取广东某硫酸厂工业堆渣周围土壤样品,重点研究了土壤剖面Tl、Cd、Pb、Zn四种重金属元素总量及形态分布特征。研究结果表明,该废渣在自然淋滤条件下已经对周围土壤产生了Tl、Cd、Pb、Zn污染,并且Tl、Pb、Cd较Zn污染严重。形态分析表明,堆渣场周围土壤中这些重金属主要是以残渣态和铁锰氧化物(氢氧化物)结合态存在。外围土壤受到的这些重金属污染及对环境的潜在危害大于废渣下伏土壤,其中在堆渣下伏土壤中主要以富集为主,而外围土壤中主要以迁移为主,且已经向土壤深处约30cm处进行了迁移。这些重金属污染物在表层土壤中未达到饱和状态,将继续在下伏土壤表层发生累积作用并且使横向土壤受污染的范围进一步扩大。The total amount and phases of thallium（ Cd, Pb, Zn） in soil profile within the deposed slag collected from a sulphuric acid plant in Guangdong were investigated. The results show that the soils around the slag were contaminated by these heavy metals and Tl, Pb, Cd polluted heavier than Zn in the process of natural leaching. The phase of these heavy metals are mainly in Fe/MnO oxides （hydroxid） and residual fractions. The degree of pollution and the potential harm of these heavy metals in exoteric soil profile are higher than the soils underling slag. These elements in the soils under slag are mainly enrichment in the surface soil but outside slag they behave transference character and they have entered the deep soils about 30cm. The four elements are not saturated in surface soil and they will accumulate in soils of under slag profile but transfer in exoteric profile continuously. The transverse soil around this slag will contaminate more serious and wider in future.

关 键 词：土壤 重金属污染 形态分析 环境影响 硫酸废渣 

分 类 号：X825[环境科学与工程—环境工程]