山东烟台环境介质中重金属元素富集特征及与酸化土壤的关系.doc

文档介绍：2012年4月
April 2012

岩矿测试
ROCK AND MINERAL ANALYSIS


361~369
文章编号:0254—5357(2012)02—0361—09
山东烟台环境介质中重金属元素富集特征及与酸化土壤的关系
王存龙,郑伟军,王红晋,曾宪东,季顺乐
(山东省地质调查院,山东济南250013)
摘要:利用山东省烟台市生态地球化学调查及相关专题研究所取得的分析测试数据,通过高灵敏度的识别
系统和多参数地球化学评价体系的建立,揭示了在重金属污染区内酸化的土壤环境中cd、Hg、Pb、As等重金
属元素活化迁移的地球化学机制、影响因素,以及浅层地下水和玉米等主要粮食作物籽实中重金属超标的原
因及生态危害。与全国土壤基准值和背景值对比,研究区内Cd、Cr、Ni、Pb等元素的基准值相对偏高。Cd、
Cr、Pb、cu、Ni元素的背景值相对较高。As、cd、cr、Ni、Hg、Pb等存在于Ⅲ级及Ⅲ类以上土壤,是主要致污因
子。典型金矿污染区内浅层地下水和玉米籽实中均检出超标重金属元素,影响浅层地下水环境质量的主要
指标是Pb。达到Ⅲ%;玉米中的Cd含量相对较
高。表层酸性、%,土壤酸化趋势明显。随着土壤酸化程度的加深和范围
扩大,导致土壤耕作层可给性营养元素的损失及某些毒性元素(cd、Pb等)的释出和活化,提高了土壤中主
要污染因子cd、Hg、Ni、Pb、As等重金属的活化迁移能力;富含有机质的土壤中有利于对cu、zn、Pb、Cd的吸
收,固重金属元素于土壤中,降低了土壤重金属污染的环境风险水平。研究结果为土壤修复、降低土壤重金
属毒性提供了重要的科学依据。
关键词:土壤酸化;重金属元素;富集特征;活化迁移;山东烟台
中图分类号:P59;X53
文献标识码:A
The Relationship between Heavy

Metals Enrichment

Characteristics and
Soil Acidification for Environmental
Shandong Province
Media in Yantai of
WANG Cun—long,ZHENG

Wei-jun,WANG Hong-jin,ZENG Xian—dong,Jl

Shun—le
(Shandong
Institute of Geological Survey,Jinan
250013,China)
Abstract:By testing data obtained from the Yantai eco—geochemical survey and associated special topic study,it
was
discovered that Cd,Hg,Pb,As and other heavy metal elements
geochemical mechanism influence activation
and migration in the acidic soil environment of
heavily metal—polluted

well
indicating the
for
ecological risk of heavy metal in shallow underground
water
and main grain pared with the reference and
background values of the whole country
s
soil,Cd,Cr,Ni
and Pb
reference values in this study
were
relatively hish,and the background values of Cd,Cr,Pb,Cu and Ni were relatively ,Cd,Cr,Ni,Hg
and Pb
occurred
in the three—grade and above three-grade soil,which were the main metal
elements,which exceed the standard,were detected in shallow groundwater from typical gold contaminated areas