广西大厂矿区土壤-植物系统中Sb、As的迁移转化特征  

Distribution and mobility of Sb and As in topsoils and plants in the Dachang multi-metalliferous mine area,Guangxi,China

作　　者：李玲[1,2] 张国平[1] 刘虹[1] 项萌[1,2] 魏晓飞[1,2] 李海霞[3] 

机构地区：[1]中国科学院地球化学研究所环境地球化学国家重点实验室,贵阳550002 [2]中国科学院研究生院,北京100049 [3]天津师范大学,天津300387

出　　处：《环境科学学报》2010年第11期2305-2313,共9页Acta Scientiae Circumstantiae

基　　金：中国科学院重要方向项目(NoKZCXZ-YW-135);国家自然科学基金(No40773073;40973084)~~

摘　　要：以广西大厂多金属矿区为例,选择了3个典型矿渣堆,对其中的土壤和植物进行样品采集,分析了土壤与植物样品中Sb、As含量的分布特征,并对土壤样品进行水溶态浸提实验.结果表明,矿山活动作为环境中Sb、As的一个重要来源,已经对矿区及其周边环境形成威胁.土壤pH值对Sb、As的活动性具有很大影响,pH值越高,土壤中Sb、As的活动性越高.相比之下,Sb比As的活动性更强.Sb、As在矿区土壤-植物体系的分布特征表明,蜈蚣草对Sb、As均具有一定的吸收能力,其吸收能力均表现为:根>叶>茎,但Sb从植物地下部向地上部转运的能力较As弱.Soil and plant samples from three tailing dumps of the Dachang multi-metalliferous mine area were collected and analyzed by ICP-MS. The distribution and mobility of Sb and As in topsoils and plants were investigated,so as to assess the potential risk of Sb and As to the environment. Antimony and arsenic mobility in the soils was estimated by measuring the soluble fraction. The mobilities of Sb and As show a positive correlation with soil pH. In addition,Sb appears to have a higher mobility than As. Regarding the metalloid enrichment in plants,Sb and As only appear to accumulate in Pteris vittata,and the concentrations of Sb and As in plant parts are in the order roots leaves shoots. Furthermore,plants in the study area have a lower ability to translocate Sb than As from the root to the epigeal part.

关 键 词：锑 砷 矿山 土壤 植物 活动性 

分 类 号：X53[环境科学与工程—环境工程]