四川省江油市河西乡附子道地产地土壤重金属分布特征及环境质量评价

Distribution Features of Soil Heavy Metal Elements and Assessment of Soil Environmental Quality in Tradition Area of Chinese Medicinal Aconitum carmichae in Hexi Area,Jiangyou City

对江油市河西乡附子道地产地表层土壤以及3个垂向剖面土壤样品中重金属元素含量进行了分析.结果表明,表层土壤中Hg、Cd、Zn、Cu等重金属元素含量较高,相对于中国土壤（A层）背景值显著富集,其中Hg、Cd的含量最高;Hg、Cd、Zn、Cu、Pb主要富集在垂直剖面0~30 cm,其中Hg、Cd的含量大大高出深层含量,表明该区土壤受人类活动影响较大.单项污染指数和尼梅罗综合污染指数对土壤环境质量的评价表明,按国家土壤环境质量评价标准中的一级标准,附子道地产地土壤环境总体上受到重金属的轻度污染,仅部分地区受到重金属的中度或重度污染.

Based on analysis of soil heavy metal element contents in the topsoil and three soil vertical profiles sample in tradition area of Chinese rare medicinal Fuzi ,Aconitum carmichae Debx. , in Hexi Area of Jiangyou City, The contents of Cd,Hg,Zn,Cu were higher compared with the background of Chinese soil （ A horizon）, and in significant enrichment, among which Cd and Zn contents were the highest in the topsoil. The elements of Hg,Cd,Zn,Cu,Pb mainly enriched in the depth of 0 -30 cm,which were influenced by human activities in the soil vertical profiles. The contents of Hg,Cd elements in topsoil were higher than that of the deep layer. According to the Nation Environmental Quality StandardIfor soil, the single and synthesis pollution index on soil environmental quality assessment showed that the soil environment of tradition area of Fuzi was light pollution by heavy metals,except some sites of moderate or severe pollution.