土地利用/覆被变化(LUCC)与土壤重金属积累的关系研究进展  

Research Review of the Relationship between Land Use/Cover Change and Heavy Metal Accumulation in Soil

作　　者：宋成军[1] 张玉华[1] 刘东生[1] 李想[1] 张艳丽[1] 徐哲[1] 

机构地区：[1]农业部规划设计研究院农村能源与环保研究所,北京100125

出　　处：《生态毒理学报》2009年第5期617-624,共8页Asian Journal of Ecotoxicology

基　　金：现代农业产业工程技术评价与标准体系框架项目(No.200903009-06)

摘　　要：土壤重金属污染是世界性环境问题之一.土地利用/覆被变化(LUCC)是最主要的环境演变驱动因子之一.为明晰LUCC对土壤重金属积累和污染的影响,根据前人研究,从场地、县域和流域/区域尺度总结了LUCC和土壤重金属污染的关系.研究发现,三个尺度上土地利用方式和覆被类型/格局是控制土壤重金属空间积累和分布的重要因子,土地利用/覆被可以直接吸纳或吸附重金属,亦能通过改变土壤物理、化学和生物性质从而控制重金属在土壤中的移动性和活性,造成土壤中重金属的积累直至污染.此外,论文阐明了LUCC在土壤重金属污染风险预测、规避和污染土壤修复中的重要作用,最后提出了在实践中通过调整土地利用/覆被类型进行污染土壤修复的建议.寓景观生态学思想于土壤重金属污染防治过程是一种新的有效途径.Soil heavy metal pollution is one of the world’s most critical environmental problems, and land use/cover change （LUCC）is one of the strongest environmental driver factors. In order to clarify the influences of LUCC on heavy metal accumulation and pollution in soil, according to previous research, the relationship between LUCC and soil heavy metal accumulation was generalized at site scale, county scale and region scale. The results showed that land use type and cover type/pattern were one important determinant factor for spatial accumulation and distribution of heavy metal in soils. The land use/cover could directly absorb heavy metals, and dominate the mobility and availability of heavy metals through impacting the physio -chemical and biological properties and then cause their accumulation and pollution in soil. Due to great significance of LUCC in decreasing and avoiding the environmental risk from soil pollution, it was highlighted in soil remediation application. Eventually, LUCC is proposed to remedy contaminated soil. Landscape ecology is a new effective way in the soil heavy metals pollution prevention and control process.

关 键 词：土地利用/覆被变化 土壤 重金属积累 尺度 土壤修复 

分 类 号：X144[环境科学与工程—环境科学] X53