用水系沉积物分析数据评价浙江土壤环境质量

以第二代区域地球化学重新扫面获得的元素定量分析数据为依据, 按国家土壤环境质量标准, 用水系沉积物资料对全省土壤环境质量级别进行划分。指出1990年前浙江土壤质量整体是好的, 评价环境质量(元素含量)指标, 几乎都在国标一、二级范围内。上世纪90年代前, 本省土壤重金属面型污染主要是As、Cd、U、Ni, 其次是Hg。Cd、As、Ni、U污染区主要分布在皖浙边界一带本省内侧, Ni、Cr严重污染区集中在嵊县、新昌附近;Sn、Hg污染区主要展布在宁波、绍兴、杭州、嘉兴等市、县范围。除Hg属次生污染外, 其他元素均属原始污染类型。

THE APPLICATION OF STREAM SEDIMENTS ANALYTICAL DATA TO THE EVALUATION OF SOIL ENVIRONMENTAL QUALITHY OF ZHEJIANG PROVINCE

Based on the quantitative analytical data obtained in the second generation regional geochemical survey and the national standard of soil environmental quality, the authors used the stream sediments data to classify soil environmental qualities of the whole Zhejiang Province. It is pointed out that before 1990 the soil quality was on the whole quite good and the environmental quality (element content) indices were almost all within the ranges of Grade I and Grade II of the national standard. Before 1990s, the heavy metal planar pollution elements were mainly As, Cd, U, Ni, and subordinately Hg. The Cd, As, Ni and U polluted areas were chiefly distributed on the inner side of Anhui-Zhejiang boundary, the Ni, Cr heavily polluted areas were concentrated in Shengxian and Xinchang areas, and the Sn, Hg polluted areas were spread in Ningbo, Shaoxing, Hangzhou and Jiaxing areas. It is held that except for He which belongs to secondary pollution, all pollution elements are of the primary pollution type.