南方典型丘陵区酸性土壤重金属地球化学分布特征及来源分异解析  

The Geochemical Distribution Characteristics and Source Analysis of Heavy Metals in the Typical Hilly Acidic Soil Region of South China

作　　者：李杰[1,2] 朱立新[1] 战明国 杨志强 钟聪[4] 

机构地区：[1]中国地质科学院,北京100037 [2]广西壮族自治区地质调查院,南宁530023 [3]广西地质矿产勘查开发局,南宁530023 [4]北部湾环境演变与资源利用教育部重点实验室,广西地表过程与智能模拟重点实验室,广西师范学院,南宁530001

出　　处：《地质学报》2016年第8期1978-1987,共10页Acta Geologica Sinica

基　　金：国家自然科学基金项目(编号:41361022);广西科技开发项目(编号:2014DD29090);广西南宁市邕宁区土地质量地球化学评价(桂国土资函,[2014]877号)联合资助的项目成果

摘　　要：本文采用基于多元统计的APCS-MLR和基于GIS技术的地统计学相结合的方法,以广西南宁市郊区典型丘陵水稻种植区酸性土壤为例,有效的对土壤重金属的空间分布特征和来源分异进行了解析和验证。结果表明:(1)研究区8种重金属中除部分样点的Cd以外,其它元素含量均未超过国家土壤环境质量的二级标准。研究区土壤大部分未受到污染,少部分受到了轻污染,其中Cd处于轻污染的样品数最多;(2)重金属在不同岩性岩石中的含量差异较大;(3)研究区水稻产区农田土壤重金属来源主要包括土壤母质继承和农田施肥,其中值得注意的是农田施肥中引入较多的重金属为Hg和Cd。此外,研究区主要的岩石类型碳酸盐岩中含有较高含量的Cd和Hg;(4)本文研究结果对于南方丘陵区酸性土壤重金属污染的特征与防治的研究具有重要的参考意义。同时,本文所提出的绝对主成分得分(APCS)与GIS相结合的方法能够有效的对主成分分析的结果进行有效的补充和有力的验证,对于相关研究具有一定的示范意义。In this paper, the soil samples in the suburb of Naning in Guangxi Province were collected, which is a typical hilly rice-growing area with soil acidification. The spatial distributions and sources of soil heavy metals were effectively explored by applying the APCS-MLR based on multivariate statistics and the geostatistics based on GIS. The results were shown as follows. （1） All the heavy metals were lower than the threshold by the national soil environmental quality standard except certain cadmium（Cd） in the study area. Most of the soils were not polluted except a small number of lightly Cd pollutions. （2） The contents of heavy metals were varied in different types of rocks. （3） The sources of soil heavy mentals were mainly soil parent materials and field fertilizations. Especially, a mass of Cd and mercury（Hg） were inputted by field fertilizations. In addition, the carbonate rock had higher concentrations of Cd and Hg, which was the main rock types in the study region. （4） This paper contributes to the study on the signatures and prevention of soil heavy metal pollution in the hilly acidic soil regions of South China. Meanwhile, the method combinated by absolute principal component score（APCS） and ArcGIS can effectively verify the results of principal component analysis（PCA）.

关 键 词：酸性土壤 丘陵 重金属 绝对主成分得分 GIS 

分 类 号：X53[环境科学与工程—环境工程]