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本研究测定了江苏省赣榆至启东沿海10个县、市平均高潮线以上海涂土壤中铜、锌、铅、铬、镍、镉、砷和汞8种环境元素的含量。通过统计分析说明,采样区内未发现污染,从而获得了各元素的自然背景值。铅的自然背景值为2.14～20.66ppm;其他元素经正态化后的自然背景值分别如下:铜为6.30～23.74ppm,锌为24.37～69.93ppm,铬为42.17～78.05ppm,镍为14.29～25.49ppm,镉为0.028～0.056ppm,砷为5.90～8.86ppm,汞为0.011～0.035ppm。
This study determined the contents of 8 environmental elements including Cu, Zn, Pb, Cr, Ni, Cd, As, and Hg in the topsoil above the average climax line in 10 counties along the coast from Ganyu to Qidong in Jiangsu Province. Through statistical analysis shows that no contamination was found in the sampling area, thus obtaining the natural background value of each element. The natural background value of lead is 2.14 ~ 20.66ppm; the natural background values of other elements after normalization are as follows: copper is 6.30 ~ 23.74ppm, zinc is 24.37 ~ 69.93ppm, chromium is 42.17 ~ 78.05ppm, nickel is 14.29 ~ 25.49 ppm, cadmium 0.028 ~ 0.056 ppm, arsenic 5.90 ~ 8.86 ppm, and mercury 0.011 ~ 0.035 ppm.