Abstract:Atmospheric deposition (wet and dry) of heavy metals (Cu, Zn, Pb, Cr, Ni) in six different urban function zones of Nanjing were monitored monthly from year 2005 to 2008. Heavy metals of surface soils in each zone and 206Pb/207Pb ratio in a particular soil profile were studied to explore the effect of atmospheric deposition on soil environment. Enrichment factor and potential ecological risk index showed that Cu, Zn andPb were strongly anthropogenicallyenriched, and Cu, Pb were the critical elementswith potential ecological risksin atmospheric deposition. Atmospheric deposition induced the enrichment of heavy metals in surface soils except for the forest scenic zone. Prediction results based on a simple accumulation model found that the accumulation of heavy metalsby atmospheric depositionwassignificant in the iron metallurgicalindustrial zone, especially for elements Zn and Pb. The verticaldistribution of Pb content and 206Pb/207Pb ration in thesoils in the vicinity of an iron metallurgical industrial zone showed that the influence of atmospheric deposition was mainly occurred in surface soils. The binary model of 206Pb/207Pb validated the prediction of the accumulation modelof heavy metals in iron industrial zone soil and showed that heavy metals such as Pb in the surface soils were affected obviously by atmospheric deposition.
李山泉, 杨金玲, 阮心玲, 张甘霖. 南京市大气沉降中重金属特征及对土壤环境的影响[J]. 中国环境科学, 2014, 34(1): 22-29.
LI Shan-Quan, YANG Jin-Ling, RUAN Xin-Ling, ZHANG Gan-Lin. Atmospheric deposition of heavy metals and their impacts on soil environmentin in typical urban areas of Nanjing. . CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(1): 22-29.