【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。更多还原

【Abstract】 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.更多还原