卢培虎?许继影?葛祝时?李子卓?刘传宁?左常海



摘 要:为掌握城市不同功能区土壤重金属的空间分布规律,以宿州市为例,考虑市区环境复杂性,将其划分为政务新区、经济开发区、老城居民区、北关工业聚集区四个不同功能区,布置39个采样点。样品测试结果表明,检测的Cu、Pb、Zn、Cd、Ni、Cr、Hg、As这8种重金属元素的含量分别超出安徽省背景值246.35%、44.15%、31.76%、342.86%、43.6%、37.78%、580%和75.62%。从地质累积指数角度评判来看,宿州市政务新区与经济开发区的污染较轻,老城居民区和北关工业聚集区污染较重,与交通车流量、居住时间和工业发展关系密切。
关键词:土壤重金属;不同功能区;地质累积指数
中图分类号:X833;X825文献标识码:A文章编号:1003-5168(2021)05-0132-06
Abstract: In order to understand the spatial distribution of soil heavy metals in different functional areas of the city, taking Suzhou City as an example, considering the complexity of urban environment, it was divided into four functional areas, namely new administrative area, economic development zone, residential area of old city and Beiguan industrial agglomeration area, with 39 sampling points. The results showed that the contents of Cu, Pb, Zn, CD, Ni, Cr, Hg and as exceeded the background values of Anhui Province by 246.35%, 44.15%, 31.76%, 342.86%, 43.6%, 37.78%, 580% and 75.62%, respectively. From the perspective of geological accumulation index, the pollution in the new government area and economic development zone in suzhou was relatively light, while the pollution in the old residential area and the industrial gathering area in beiguan was relatively heavy, which was closely related to the carflow and industrial development.
Keywords: heavy metals in soil;different functional areas;geologic accumulation index
土壤是人类赖以生存的自然環境。随着工业的快速发展、城市污染的加剧,我国土壤重金属污染日益严重。土壤中的有害重金属被称为“化学定时炸弹”,积累到一定程度,不仅会导致土壤退化,而且会通过径流、淋失的作用,污染地表水和地下水,恶化水文环境,并且可能会直接危害植物或通过食物链危害人体健康。因此,土壤重金属污染及其由此产生的后果已经成为全球关注的重大问题。
在此背景下,大量关于城市土壤重金属污染状况的研究得以展开。研究成果主要应用于土壤重金属污染评价及环境修复方面。李芳、钱秋芳通过对重金属物理和化学性质的研究,从物理、生物、化学三个方面提出了土壤重金属污染的修复措施,并指明了各项措施的优缺点,对土壤……