基于地质累积与内梅罗指数的土壤污染分析.pdfVIP

中国农学通报 2009,25(20): 174-178 Chinese Agricultural Science Bulletin 基于地质累积与内梅罗指数的 耕地重金属污染研究 刘衍君，汤庆新，白振华，张秀玲，张保华 （聊城大学环境与规划学院，山东聊城252000 ） 摘 要：按8 km×8 km 网格将聊城市耕地分为136 个采样点，调查As ，Cd ，Cr ，Cu ，Hg ，Ni ，Pb ，Zn 等8 种重 金属的含量。采用地质累积指数与内梅罗指数相结合的综合指数法进行污染评价，以此判断重金属污 染的程度；并对8 种重金属进行各样点的含量差异分析；最后，应用ArcGIS8.3 ，以污染评价结果为数据 支持，进行重金属污染空间分布研究。新的综合指数法评价结果表明，聊城市重金属污染的程度依次为 Hg ＞Cu ＞Cd ＞Zn ＞Cr ＞Pb ＞As ＞Ni ；各元素总体平均变异程度为：Zn AsHgCrNiCuPbCd ；土 壤各重金属污染分布不尽相同，但总体上区域差异较小。 关键词：ArcGIS ；土壤重金属；地质累积指数；内梅罗指数 中图分类号：S143.7 文献标识码：A 论文编号：2009-0885 The Resarch of Heavy Metals Pollution in Soil Based on the Connection of Geoaccumulation Index and Nemero Index Liu Yanjun, Tang Qingxin, Bai Zhenhua, Zhang Xiuling, Zhang Baohua (College of Environment and Planning, Liaocheng University, Liaocheng Shandong 252000) Abstract: As, Cd, Cr, Cu, Hg, Ni, Pb and Zn in 136 soil samples had been monitored in Liaocheng. A new method which connect geoaccumulation index with Nemero index was used to evaluate the metal pollution. The polluted degree of all heavy metals had been ensured. Then, the Variance in all samples of all heavy metals had been analyzed. At last, ArcGIS8.3 had been used to study the distribution of heavy metals pollution. The re⁃ sult showed that the polluted degree of all heavy metals is different. Its order is: HgCuCdZnPbAsNi. The Coefficient of variation order of all heavy metals is: Zn AsHgCrNiCuPbCd. There were not big difficult in different soil samples. Key words: Arc GIS, soil metals, geoaccumulation index, Nemero index [5-6] [7] 0 引言