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

1.
山东省地质调查院, 山东济南 250013
2.
山东省地质调查院, 山东济南 250013
3.
山东省地质调查院, 山东济南 250013
4.
山东省地质调查院, 山东济南 250013
5.
山东省地质调查院, 山东济南 250013

基金项目:

山东省国土资源厅地质大调查项目(2006709)

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- 收稿日期: 2011-09-23

The Relationship between Heavy Metals Enrichment Characteristics and Soil Acidification for Environmental Media in Yantai of Shandong Province

1.
Shandong Institute of Geological Survey, Jinan 250013, China
2.
Shandong Institute of Geological Survey, Jinan 250013, China
3.
Shandong Institute of Geological Survey, Jinan 250013, China
4.
Shandong Institute of Geological Survey, Jinan 250013, China
5.
Shandong Institute of Geological Survey, Jinan 250013, China

摘要

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类及以上水质标准的采样点数占研究区总采样点数的3.47%;玉米中的Cd含量相对较高。表层酸性、弱酸性土壤占土壤总面积的55.29%,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。
- 土壤酸化 /
- 重金属元素 /
- 富集特征 /
- 活化迁移 /
- 山东烟台
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 a heavily metal-polluted area, as well as indicating the reason for ecological risk of heavy metal in shallow underground water and main grain seeds. Compared with the reference and background values of the whole country's soil, Cd, Cr, Ni and Pb's reference values in this study area were relatively high, and the background values of Cd, Cr, Pb, Cu and Ni were relatively high. As, Cd, Cr, Ni, Hg and Pb occurred in the three-grade and above three-grade soil, which were the main pollutants. Heavy metal elements, which exceed the standard, were detected in shallow groundwater from typical gold contaminated areas and corn fruits. Pb is the main index that affect the quality of shallow groundwater. The number of three-grade and above three-grade water samples was 30, which accounted for 3.47% of the total sampling points. There were 4 corn samples in which the Cd content was higher than the agricultural contamination standard, which account for 12.9%. The comparative study indicates that surface acidic soil accounts for the total soil area acidity increasing from 16.04% to 55.29%. The soil acidic trend is obvious. As the soil acidification was worse in the depth and coverage area, the soil ecological environment had deteriorated, which led to the loss of nutrient elements and some poison elements (Cd, Pb) being released and activated. It also raised the heavy metal elements' activity and migration ability, such as Cd, Hg, Ni, Pb and As. Soil rich in SOM helped to absorb heavy metal elements, such as Cu, Zn, Pb, Cd, and reduced the environmental risk level of soil heavy metal pollution. This provided a scientific basis for restoring the soil and reducing the toxicity of the soil.
- soil /
- acidification /
- heavy /
- metal /
- elements

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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

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出版历程

The Relationship between Heavy Metals Enrichment Characteristics and Soil Acidification for Environmental Media in Yantai of Shandong Province

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