摘要
土壤中重金属能够通过土壤孔隙迁移至地下水中,对生态环境造成污染,对人体健康构成威胁。土壤胶体因其巨大的比表面积和特殊的双电层结构能够对土壤中重金属的迁移和生物有效性产生影响。总结归纳了pH、离子强度、水动力作用、胶体粒径和孔隙尺寸等因素对重金属迁移行为的阻滞和促进作用。探讨了土壤胶体对重金属生物有效性的影响机制,并对今后的研究方向进行了展望。
Heavy metals in soil can migrate to groundwater through soil pore,which pollutes the ecological environment and poses a threat to human health.Soil colloids can affect the migration and bioavailability of heavy metals in soil because of their huge specific surface area and special electric double layer structure.The retardation and promotion effects of soil colloids on the migration of heavy metals under different pH,ionic strength,hydrodynamic force and the ratio of colloid size to pore size were summarized.The mechnisms of soil colloids on the bioavailability of heavy metals were discussed,and the future research directions were prospected.
作者
杨士
卢陈彬
刘祖文
张军
吴梦
蔡泽祥
YANG Shi;LU Chenbin;LIU Zuwen;ZHANG Jun;WU Meng;CAI Zexiang(Jiangxi Key Laboratory of Environmental Geotechnology and Engineering Disaster Control,Ganzhou Jiangxi 341000;School of Architectural and Surveying & Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou Jiangxi 341000;School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou Jiangxi 341000)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2019年第8期974-978,共5页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.51464014)
江西省研究生创新专项资金资助项目(No.YC2017-S293)
关键词
土壤胶体
重金属
阻滞迁移
促进迁移
生物有效性
soil colloid
heavy metal
blocking migration
facilitating migration
bioavailability
