Research on soil multi-media environmental pollution around a Pb-Zn mining and smelting plant in the karst area of Guang
The method of principal component analysis was applied to systematical research on the soil multi-media environment, including soil, surface water, ground water, waterbody sediment and agricultural crops, as well as pollution-inducing wastewater, mullock (or waste ore) and slag in the periphery of a large-sized Pb-Zn mining and smelting plant in a karst area of Guangxi Zhuang Autonomous Region. The results revealed that soils in the area studied have been heavily polluted by Cd, Zn, Pb and Hg, and the levels of these metals in the samples of agricultural crop greatly exceed the standards. The above-mentioned pollutants exist in all soil-multi-media environments. The mullock, slag, wastewater, surface water, ground water, soil, and agricultural crops constitute a composite ecological chain. Therefore, the improper disposal of mullock and slag, and the use of polluted wastewater for agricultural irrigation are the main causes of soil pollution. Heavy metals in the soil have three transition progresses: point (improved soil with slag, ground water inflow plot), linear (river transition) and non-point transition (regional pollution by slag) patterns, and the tailing yard is the most important locus for heavy metals to release into the environment.
作 者： DENG Chaobing WANG Shuangfei LI Fasheng 作者单位： DENG Chaobing(Guangxi University, Nanning 530001, China;Guangxi Zhuang Autonomous Region Environmental Monitoring Station, Nanning 530022, China)WANG Shuangfei(Guangxi University, Nanning 530001, China)
LI Fasheng(Department of Soil Pollution Control, Chinese Research Academy of Environment Sciences, Beijing 100012, China)
刊 名： 中国地球化学学报（英文版） 英文刊名： CHINESE JOURNAL OF GEOCHEMISTRY 年，卷(期)： 2009 28(2) 分类号： P59 关键词： karst region Pb-Zn mining and smelting plant soil principal component analysis soil-multi-media environment heavy meal pollution