摘要
以山东省东部地区农业生态地球化学调查取得的区域土壤地球化学数据为依据,研究了区内54种元素或指标的土壤地球化学基准值和背景值与全国土壤的差异。通过对比区内土壤基准值与背景值的变化,认为本区大部分元素或指标在表层土壤中的含量继承了成土母质,后期人类活动对其影响较小,Zn、Pb、Cu、Se、Cd、S、P、Hg、N、OrgC等元素或指标在表生作用或人类活动等因素影响下,其分布分配特征产生明显变化。本文通过对表层和深层土壤元素相关系数的研究,认为深层土壤元素地球化学含量可表征表层土壤原始沉积的地球化学含量;讨论了人为活动导致土壤污染的评价方法,莱州—招远—烟台和牟平—乳山金矿集中区以及人口密集的城镇地带表层土壤中Hg、Cd、Pb、As、Zn、Se、S等元素污染严重。地质背景和人类活动(采金污染、工业生产、城市人口密集生活等)的共同作用,是造成环境中有害元素含量较高的主要原因。
Based on the agro-ecological geochemical survey of east Shandong Province,the authors studied the differences of geochemical background values and baselines of 54 elements or indicators in soil between the study area and whole China.Through comparing the background values and baselines of soil in the study area,it is found that most of the elements or indicators of the surface soil have inherited the content of parent materials,and the human activities has had little effect on them.Meanwhile,an obvious change in the distribution of such components as Zn,Pb,Cu,Se,Cd,S,P,Hg,N and OrgC was found in surface soil,which might be attributed to the supergene or human activities.The correlation analysis between elements in surface soil and deep soil confirms that concentrations of elements in deep soil can reflect the original geochemical content of elements in surface soil.Pollution assessment methods are discussed,and it is revealed that pollutions of Hg,Cd,Pb,As,Zn,Se,S,in surface soil are very serious in such gold orefields as Laizhou-Zhaoyuan-Yantai and Muping-Rushan and in residential areas of cities.These contaminations could be attributed to the geological background and human activites such as gold mining,industrial activities and urban emissions.
出处
《中国地质》
CAS
CSCD
北大核心
2011年第5期1387-1395,共9页
Geology in China
基金
山东省国土资源大调查项目"山东省东部地区农业生态地球化学调查"(2006709)资助
关键词
生态地球化学
背景值
相关系数
山东东部
ecological geochemistry
background value
correlation coefficient
east Shandong Province
