基于多重分形的表层土壤中重金属元素来源分析——以海南省琼海市为例  

Origins of Heavy Metals in Topsoil Based on Multifractal Method:A Case Study in Qionghai City,Hainan Province

作　　者：柯贤忠[1,2] 程绪江 谢淑云[2,4] 贺跃[1] 刘小龙[1,2] 

机构地区：[1]中国地质大学研究生院,武汉430074 [2]中国地质大学地球科学学院,武汉430074 [3]天津市地质调查研究院,天津300191 [4]中国地质大学地质过程与矿产资源国家重点实验室,武汉430074

出　　处：《地质科技情报》2010年第1期97-102,共6页Geological Science and Technology Information

基　　金：国家青年自然科学基金项目(40502029)

摘　　要：分形与多重分形已逐渐渗透到环境地球化学调查与评价领域,通过分形与多重分形方法、结合变异系数和富集系数,初步探讨了海南省琼海市表层土壤中重金属元素的来源。结果显示,研究区表层土壤中Pb元素的高含量区明显与琼海市南部地区几大农场的分布密切相关,显示Pb可能受人为因素影响强烈,As的富集可能来源于农业活动,Ni的富集主要来源于成土母岩的风化,其他元素受到后期人类活动影响较小或基本未受影响。The increasing application of fractal and multifractal in environmental geochemistry investigation and assessments has proved that the distribution of element contents in soils and stream sediments possesses fractal and multifractal properties. As the heavy metals in soils are of great importance in environmental geochemistry research, most researches are focused on the origins of heavy metals in soils were based on traditional statistical methods, such as correlation analysis, cluster analysis, factor analysis and discriminant analysis. In this paper, the origins of heavy metals of topsoil in Qionghai City, Hainan Province were studied by using fractal and multifractal methods, integrated with variation coefficients and accumulation coefficients. The results indicate that the contents of Pb in topsoil were strongly impacted by human activities and the accumulation of As and Ni resulted from agricultural activities and weathering of soil forming rocks, respectively. Whereas human activities have little or even no effects on those of other five heavy metal elements in the topsoil.

关 键 词：琼海市 重金属元素 多重分形 变异系数 富集系数 

分 类 号：X142[环境科学与工程—环境科学]