模拟土壤重金属的溶出对地下水影响的研究

Study on the Impact of Simulated Soil Heavy Metal Dissolution on Groundwater

研究了不同土壤颗粒含量和浸提天数条件下,土壤颗粒质量对水中镉、铬、镍、铅、砷、铜、锌、汞8种重金属含量的测定结果,并分析了地下水中混入土壤颗粒时重金属含量测定的变化。结果表明,当一定量土壤颗粒混入地下水中时,在弱碱性条件下,对砷执行Ⅰ、Ⅱ类限值的地下水影响显著;对砷执行Ⅲ类限值的地下水,重点关注测定结果在10.0~13.0μg/L的数据;对砷执行Ⅳ类限值的场地影响不明显;对镉、铬、镍、铅、锌、汞6种重金属基本无影响,对铜的影响不明显。该发现将为实际场地环境调查中地下水重金属含量测定的风险预测提供有力的参考意见。

This paper studied the determination results of eight heavy metals,including cadmium,chromium,nickel,lead,arsenic,copper,zinc,and mercury,under different soil particle contents and leaching days.The changes in heavy metal content in groundwater mixed with soil particles were analyzed.The results show that when a certain amount of soil particles are mixed into groundwater,it has a significant effect on groundwater with arsenic ClassⅠand ClassⅡlimits under weak alkaline conditions.For groundwater with an arsenic ClassⅢlimit,the determination results of 10.0~13.0μg/L are emphasized.There is no obvious influence on sites where the arsenic ClassⅣlimit is implemented.It has no effect on cadmium,chromium,nickel,lead,zinc,and mercury,but has no obvious effect on copper.The findings will provide a strong reference for the risk prediction of heavy metal content determination in groundwater during actual site environmental investigations.