上海华新工业园区土壤重金属含量调查与评估

Investigation on heavy metal content in soil of Shanghai Huaxin Industrial Park

为了了解上海华新工业园区场地重金属浓度,判断是否已受人类活动影响,为评价该场地内工业活动对场地环境的影响提供依据,对园内待开发土壤中的重金属含量进行调查与评估,得出该园区场地的重金属浓度和分布类型,并与上海市其他区域的土壤重金属代表值进行比较。结果表明,研究区域周边前期建设的企业对研究区域的土壤产生了一定的影响,造成表层土壤中部分重金属含量超标。其中汞、锌、镉的污染主要富集在土壤表层,表明污染物在下降过程中会受到土壤的吸附作用而稀释;砷污染可以从素填土中迁移至粉质粘土中,但其在淤泥质粉质粘土中的迁移能力较弱;铜、铅、铬、镍四种重金属受到人类活动扰动的影响较小。

In this paper, the concentrations and distribution pattern of heavy metals in soil of Shanghai Huaxin Industrial Park were investigated and assessed, and the typical values of the concentrations within the industrial park were compared with those of the other regions of Shanghai. The results showed that the enterprises constructed earlier had a certain influence on the soil within the industrial park, and caused some heavy metal concentrations in the surface soil exceeded the standard. The results also showed that pollution of Hg, Zn and Cd was mainly enriched in the surface soil, indicating that the pollutants could be diluted by the adsorption of soil when they migrated. As pollution can migrated from plain fill to silty clay, but the ability to migrate in silty clay is weak. Cu, Pb, Cr, Ni were almost no disturbed by human activity.