大气降尘对土壤主要环境元素的累积影响及评价——以山东省高密市为例

姜冰, 张德明, 刘阳

Cumulative effects of atmospheric dust fall on major environmental elements in soils and their evaluation: A case study of Gaomi City, Shandong Province, China

JIANG Bing, ZHANG De-Ming, LIU Yang

表6 达到限定值所需的最小年沉降通量及其与当前年沉降通量的对比

Table 6 Minimum annual sedimentation fluxes required to reach the limit value and its comparison with the current annual sedimentation fluxes

元素 土壤背景值 限定值 当前年沉 降通量 所需最小年沉 降通量(10年) 10-6 10-6 mg·(m2·a)-1 mg·(m2·a)-1 Cu 17.7 50.0 5.67 827.0 Pb 23.67 70.00 8.08 1186.00 Zn 45.29 200.00 33.85 3961.00 Ni 21.9 60.0 2.78 975.0 Cr 59.62 150.00 5.67 2314.00 Cd 0.10 0.30 0.10 5.10 As 8.75 30.00 0.91 544.00 Hg 0.0266 1.3000 0.0084 32.6000 Se 0.17 3.00 0.266 72.40