黔西北土法炼锌区典型植物体内重金属的积累研究  

HEAVY METAL ACCUMULATION IN NATURAL PLANTS IN THE ZINC SMELTING AREA IN NORTHWESTERN GUIZHOU PROVINCE

作　　者：孙力[1] 杨元根[1] 白薇扬[1] 闭向阳[1] 金志升[1] 

机构地区：[1]中国科学院地球化学研究所

出　　处：《地球与环境》2006年第2期61-66,共6页Earth and Environment

基　　金：国家自然科学基金(40473049)

摘　　要：对黔西北土法炼锌导致的重金属严重污染地区生长茂盛的自然植被及其根部土壤进行了重金属分析测试。土壤重金属形态用连续提取法区分为有效态和强结合态,结果发现植物体内的重金属含量与土壤中有效态的重金属含量成正比。所分析的4种植物体内的Pb、Zn、Cd含量表现为Zn>Pb>Cd。接骨草(SambucusChinensis)和柳叶苦荬菜(Ixerisgracilis)在体内富集、运输重金属元素的能力很强,是对污染区生态重建非常有前景的植物。A survey of soils and four flourishing plants was carried out in the polluted sites by zinc smelting in northwestern Guizhou Province. The fractions of heavy metals in the soils were distinguished as mobile fraction and residual fraction by a short sequential extraction procedure. Heavy metal contents in the plants were found linearly increasing with their concentrations in soils around the plant rhizosphere. The concentrations of Pb, Zn and Cd in the four plants increase in the order Zn〉Pb〉Cd. Sambucus Chinensis and Ixeris gracilis were proved to have good metal-enriching and transport abilities, and these plants would be useful to recover the ecological environment in these heavy metal polluted regions.

关 键 词：土法炼锌 连续提取 植物 重金属积累 

分 类 号：X142[环境科学与工程—环境科学]