Shi Ning-ning, Ding Yan-feng, Zhao Xiu-feng, Wang Qiang-sheng
Ministry of Agriculture Key Laboratory of Crop Physiology & Ecology in Southern China, Nanjing Agricultural University, Nanjing 210095, China.
Ying Yong Sheng Tai Xue Bao. 2010 Jul;21(7):1835-43.
By the method of concentric circle distribution method, a total of 183 topsoil samples were collected from 30-km2 area around a pesticide industrial park in south Jiangsu Province, with the content and pollution index of soil Cd, Cr, Cu, Ni, Pb, Zn, Hg and As analyzed. The average contents of Hg, Cu, Cd, and Pb in the top soils were higher than those of the natural background values, and the contents of Hg and Cu were the highest. Taking the national standard II as the assessment criterion, the average pollution index values of Cd, Cr, Cu, Ni, Pb, Zn, and As in the top soils were all below 1, while those of the Hg and Cu were 1.59 and 1.05, respectively. In the southeast and northwest to the pesticide industrial park, soil heavy metals contamination was more serious, and, with the increasing distance to the park, the contents of soil Cd, Ni, Pb, Cr, As, Hg, Zn, and Cu increased first and then decreased to a stable level. The comprehensive pollution index of test metals indicated that the areas 200-1000 meter around the industrial park were of high risk in soil heavy metals contamination, while the areas 1000 meter beyond were safety. By using geostatistics and GIS, it was found that the pollution index of the eight heavy metals had significant spatial variability. Based on the principal component analysis and correlation analysis, it was speculated that the Zn, Ni, Cr, Pb, and As were mainly from soil parent materials, while the Hg, Cu, and Cd were mainly related to human activities.
采用同心圆布点法，在苏南某农药工业园区周边30平方千米区域内共采集183个表层土壤样品，分析土壤中镉（Cd）、铬（Cr）、铜（Cu）、镍（Ni）、铅（Pb）、锌（Zn）、汞（Hg）和砷（As）的含量及污染指数。表层土壤中汞、铜、镉和铅的平均含量高于自然背景值，其中汞和铜含量最高。以国家土壤环境质量二级标准为评价标准，表层土壤中镉、铬、铜、镍、铅、锌和砷的平均污染指数均低于1，而汞和铜的平均污染指数分别为1.59和1.05。在农药工业园区的东南和西北方向，土壤重金属污染较为严重，且随着与园区距离的增加，土壤中镉、镍、铅、铬、砷、汞、锌和铜的含量先增加后下降至稳定水平。测试金属的综合污染指数表明，工业园区周边200 - 1000米区域土壤重金属污染风险高，而1000米以外区域安全。通过地统计学和地理信息系统（GIS）分析发现，8种重金属的污染指数具有显著的空间变异性。基于主成分分析和相关性分析推测，锌、镍、铬、铅和砷主要来源于土壤母质，而汞、铜和镉主要与人类活动有关。
