黄河三角洲北海新区土壤环境质量分析与评价

Evaluation of Environmental Quality in Beihai New District of the Yellow River Delta

以位于黄河三角洲腹地的滨州市北海新区为研究区,分析土壤中重金属As、Hg、Pb、Cd、Cr和石油类等污染物的含量,并分别利用单因子评价与综合评价方法对该区土壤环境质量进行评价。结果表明:研究区As、Hg、Pb、Cd、Cr、石油类等的平均含量分别为:13.45,0.015,19.55,0.088,72.85,4.35 mg/kg,虽然多数样点重金属与石油类污染含量超出山东省土壤的背景值,但均未超出国家土壤环境质量的二级标准。单因子评价结果显示,研究区土壤各因子的单因子污染指数大多处于无污染或起始污染水平;综合评价结果表明,研究区有31.8%的样点综合污染指数达到轻度污染水平,68.2%的样点处于起始污染水平。该成果可为该区土地利用开发与环境保护提供基础资料。

Based on the concentrations of heavy metals and petroleum pollutants in surface soil in Beihai New District of the Yellow River Delta ,the soil environmental quality was assessed with the single-factor eval-uation and the comprehensive evaluation methods .The results showed that the average concentrations of As , Hg,Pb,Cd,Cr and petroleum pollutants were 13.45 mg/kg,0.015 mg/kg,19.55 mg/kg,0.088 mg/kg,72.85 mg/kg and 4.35mg/kg respectively.Although the concentration of heavy metals and petroleum pollutants in vast majority of the samples exceeded the soil background values of Shandong Province ,they were below the second level of the national soil environmental quality standard .The result of single-factor evaluation indicated that the individual pollution indexes were at the none contamination or initial contamination level .The result of compre-hensive evaluation indicated that the pollution indexes of 31.8 percent of the samples were at the slightly con-tamination level,those of 68.2 percent samples were at the initial contaminate level .This study provides basic data for land use and exploitation and environment protection in this area .