Abstract:To investigate the current status of soil pollution of Cr, As, Mn and Pb in tungsten mining area, a total of nine surface soil samples were collected in the tailings accumulation areas. Concentrations of Cr, As, Mn and Pb in the nine samples were measured by the inductively coupled plasma mass spectrometry (ICP-MS) and the spatial distribution of the heavy metal concentrations in this area was estimated by Kriging interpolation model. The activities of urease, catalase and invertase in these nine samples were also assessed. It was demonstrated that the average values of all the heavy metal concentrations were much higher than the background values and the mean concentrations of Cr, As, Mn and Pb were as 2.26, 3.06, 1.85 and 2.59 times high as their background values. The spatial distribution analysis of heavy metals revealed that the distribution of Mn and Pb was relatively similar, the distribution of these heavy metals in soil was banded and strong spatial correlations were observed for Cr, As, Mn, and Pb distributions, indicating that they were likely originated from the same source. Soil enzyme activities were estimated to be as low as 7%~93%, 5%~86% and 11%~90% of their background values for the urease, catalase and invertase, respectively, which further confirmed the existence of heavy metals soil pollution. Multivariate stepwise regression analysis between heavy metal contents and soil enzyme activities displayed that the coefficient between the heavy metal and the enzyme activity was different. Among them, the invertase was the most sensitive. In addition, principle component analysis pointed out that enzyme activities in mining soils were feasible indicators to assess changes in soil environmental quality caused by heavy metals pollution.
赵永红, 张静, 周丹, 王春晖. 赣南某钨矿区土壤重金属污染状况研究[J]. 中国环境科学, 2015, 35(8): 2477-2484.
ZHAO Yong-Hong, ZHANG Jing, ZHOU Dan, WANG Chun-Hui. Mixed heavy metals contamination of tungsten mine area soil in south of Jiangxi Province. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(8): 2477-2484.