安徽省宿松县北部 Cd 元素地球化学分布特征

摘要

Cd is a non essential trace element for animals and plants,and the serious pollution of Cd will do great harms to human health.Through study on geochemical anomaly distribution of Cd in stream sedi-ments and soil samples in northern Susong county in Anhui province,it is found that natural and anthro-pogenic source are two ways for the formation of Cd anomaly.In our work area,the distribution of sili-ceous rocks is the natural source of Cd anomaly,although human activity has a certain effect on the distri-bution of Cd anomaly,the scope and the impact intent are limited.However,the content of Cd in soil and stream sediment is significantly affected by mining activities.The content of Cd in mining area and nearby samples is much higher than that in general areas,thus main distribution area of Cd anomaly has been formed.%Cd 是动植物非必需的有害微量元素,严重的 Cd 污染将对人体健康构成极大危害。该次通过对安徽宿松县北部地区水系沉积物和土壤样品中 Cd 地球化学异常分布特征进行研究发现,Cd 异常的形成分为自然来源和人为来源；区内分布的硅质岩为 Cd 异常自然源的主要源头；人类的生活活动虽对 Cd 异常的分布产生了一定的影响,但影响的范围和程度有限；而采矿活动对土壤和水系沉积物中 Cd 的含量影响明显,在采矿区及附近的样品中 Cd 含量远高于一般地区样品中的含量；从而形成了区内 Cd 异常的主要分布区。