聊城市土壤重金属污染现状及其潜在风险评价

The Asessment of Soil Heavy Metals Potential Ecological Risk on Liaocheng City

土壤重金属的含量对农作物的产量及品质有一定影响,此外,长期暴露于重金属环境人类多个脏器会产生损害.采用网格法,对鲁西粮食主产区-聊城市耕地进行了土壤采样调查,监测分析了砷、镉、铬、铜、汞、镍、铅、锌8种重金属浓度.采用污染指数法对研究区域内土壤重金属污染现状进行评价,按不同县市分别分析其污染存在的差异.采用Hakanson潜在生态危害指数法,对研究区域内土壤污染潜在生态风险进行评估;基于ArcGIS,将潜在生态风险进行空间分布研究.基于相关性分析,试图探讨重金属污染的主要成因.分析认为,聊城市属有四大片区的土壤受到了中等程度的重金属污染风险,土壤环境受到了工业企业的影响,应对其进行重点治理,以减轻其对人群健康的影响.

In order to know of Shandong Province, the arable the soil heavy metals potential ecological risk in the main grain producing area land in Liaocheng was distributed as 136 points to be monitored. The pollution concentration of As, Cd, Cr, Cu, Hg, Ni, Pb and Zn had been monitored. Single index and integrated index were used to assess the soil heavy metals pollution. Hakanson＇s ecological risk index was used to asess the soil heavy metals potential ecological risk. Based on ArcGis, the spatial distribution of soil potential ecological risk was researched. Correlation of the heavy metals was analysed to find out the ralationship between the pollution and soil heavy metals content. The results showed that： there were four areas soil had been in middle degree ecological risk. And the soil environment had been polluteed by industry. Some measures had to be used to solve the soil heavy metals pollution in roder to protect the people＇s health.