城市土壤中铅分布特征及环境风险

Distribution characteristics and environmental risks of Pb in urban soil

结合近年中国城市土壤重金属污染研究成果,从城市土壤中重金属铅(Pb)的空间分布、有效态、源解析及环境风险等方面进行探讨。研究表明,人类活动对中国城市土壤中重金属Pb的扰动强烈,中国南部和东部城市的土壤中重金属Pb含量较其他地区高,主要源自城市发展过程中的交通运输、工业生产等人类活动;属于轻度污染等级的分布区域较广,但中国城市土壤重金属Pb严重污染的情况较少。根据城市土壤地球化学特征、环境风险状况采取针对性的风险管控和修复措施,对于提高城市土壤环境质量具有重要意义。

This paper investigated the spatial distribution,chemical bound forms,source analysis and environmental risks of heavy metal Pb in urban soil based on the recent research on heavy metal pollution in urban soil in China.Results show that human activities have a strong disturbance to heavy metal Pb in Chinese urban soil,and the content of heavy metal Pb in soil in the southern and eastern cities of China is higher than that in other areas,mainly from such human activities astransportation and industrial activities.Pollution levels of Pb in urban soil in most cities are at the mild grade while only very few cities were severely polluted.Targeted risk control and reclamation activities can be taken according to the geo-chemical characteristics and environmental risks,which is of great significance to the quality improvement of urban soil environment.