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当前位置: 首页 > 文章 > 苏南村镇土壤重金属空间变异性研究 土壤通报 2016,47 (1) 179-185
Position: Home > Articles > Spatial Variability of Heavy Metal Contents in Towns of Southern Jiangsu Province Chinese Journal of Soil Science 2016,47 (1) 179-185

苏南村镇土壤重金属空间变异性研究

作  者：
李小曼;刘勤;徐梦洁;孟令仪
单  位：
中国科学院南京土壤研究所;南京农业大学公共管理学院
关键词：
苏南;村镇;土壤重金属;克里金插值;空间变异
摘  要：
土壤重金属污染日趋复杂化,通过村镇级小尺度重金属空间变异的研究,能更为精确的掌握重金属的污染状况,有助于开展更具针对性的防治措施。基于地统计学和GIS技术,研究了苏南Y镇土壤表层8种重金属含量空间变异性。结果表明:Pb、As、Hg服从正态分布,其他元素经转换后服从。其中,Ni和Cr经Johnson变换后效果较好。8种重金属元素的空间相关性及结构性变异程度由高到底的顺序为:As>Pb>Cd>Ni>Cr>Hg>Zn,而Cu的空间相关性非常弱,在区域内具有恒定的变异。总体来看,Y镇土壤重金属污染较为严重,Ni、Cd、Hg的均值超过土壤环境质量二级标准,其他均未超标。溯源分析结果表明,Y镇土壤重金属污染以复合污染为主。污染主要来自东南部金属加工厂、纺织厂,北部化工厂、机械制造、玻璃厂及西部包装厂等工业污染源,因此应重点对这些排污企业进行整治。
译  名：
Spatial Variability of Heavy Metal Contents in Towns of Southern Jiangsu Province
作  者：
LI Xiao-man;LIU Qin;XU Meng-jie;MENG Ling-yi;Institute of soil Science, Chinese Academy of Science;College of Public and Administration, Nanjing Agricultural University;
关键词：
Southern Jiangsu Province;;Village;;Soil heavy metals;;Kriging;;Spatial variability
摘  要：
Traditional studies tended to ignore the spatial variability of soil heavy metal pollution, and it was difficult to explore their internal of contamination and achieve comprehensive, intuitive results. With the appearance of GIS,visualization, large-scale studies of soil heavy metal pollution were favored by researchers, and the relatively small scale, such as village-scale study had been neglected. Geostatistics combined with GIS technique were employed to analyze the spatial variability of the contents of eight heavy metals in the top soil of Y town. The result shows that Pb,As, Hg were normally distributed, while the other elements were in line with the normal distribution after conversion.In all methods, Johnson transformation method had a strong ability to make data normally distributed. Spatial correlation and structural variability of 8 kinds of heavy metals in descending order were: As > Pb > Cd > Ni > Cr >Hg > Zn. The spatial correlation of Cu was very weak and had a constant variation in the region. Overall, soil heavy metal pollution was relatively serious in Y town. The arithmetical means of the contents of Ni, Cd, Hg exceeded the national second-grading standard of soil environmental quality assessment and others did not. The results of traceability analysis showed that soil heavy metal contamination in Y town was mainly based on compound pollution.The pollution was mainly from industries such as metal processing plants, textile mills in the southeast, chemical,machinery manufacturing, glass plants in the north, packaging plants in the west and so on. These companies should be focused on pollution remediation.

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