当前位置:文档之家› 黏土矿物对土壤中重金属的钝化作用研究进展

黏土矿物对土壤中重金属的钝化作用研究进展

黏土矿物对土壤中重金属的钝化作用研究进展

杨越晴1

董颖博1,2林海1,2(1.北京科技大学能源与环境工程学院,北京100083;2.工业典型污染物资源化处理北京市重点实验室,北京100083)摘要为了助推我国重金属污染土壤的修复与治理,促进我国环保工作者熟悉黏土矿物在土壤重金属污染治理与修复中的重要作用和技术进展情况,对土壤重金属污染修复技术以及天然黏土矿物对土壤中重金属的钝化作用效果进行总结,提出了黏土矿物作为环境功能材料在土壤重金属修复领域的优势,重点阐述了黏土矿物的改性方法及改性机理,包括物理改性、化学改性、复合改性等,并总结了改性黏土矿物材料对土壤中重金属钝化性能的提升和钝化机理,综合分析了黏土矿物作为环境功能材料的优缺点。最后,结合目前该领域的研究与实践情况,针对改性黏土矿物材料的研究和应用前景进行了展望,提出长效考察、联合修复、土壤分类、移除技术及基于矿物相组成差异的修复等是今后研究的重要方向。

关键词土壤重金属污染改性黏土矿物钝化作用

中图分类号X53,X131.3文献标志码A

文章编号1001-1250(2018)-09-033-08DOI 10.19614/https://www.doczj.com/doc/8713243556.html,ki.jsks.201809006

Research Progress of Passivation on Heavy Metals in Soils by Clay Minerals

Yang Yueqing 1Dong Yingbo 1,2Lin Hai 1,2(1.School of Energy and Environmental Engineering ,University of Science and Technology Beijing ,Beijing 100083,China ;

2.Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants ,Beijing 100083,China )

Abstract In order to promote the progress of the renovate and treatment of heavy metal contaminated soil in China ,pro?mote environmental protection workers get a well knowledge about the important role and current technical development of clay minerals in treating and repairing heavy metal contaminated soil ,the techniques and passivation effect of natural clay minerals in treating heavy metal contaminated soil was summarized ,provided the advantages of clay minerals as environmen?tal functional materials in the field of soil heavy metal remediation.The methods and mechanism of modification of clay miner?als is emphatically summarized ,including physical modification ,chemical modification ,composite modification ,etc.At the same time ,the improvement of passivation performance of modified clay mineral materials and the passivation mechanism were summarized ,both the advantages and disadvantages of clay minerals as environmental functional materials were also an?alyzed.In the end ,prospect for the research and application of modified clay minerals based on the current research and prac?tice of the field ,proposed long -term investigations ,combined restorations ,soil classification ,removal techniques and the treatment based on the combination of minerals is important research direction in the future.Keywords Soil ,Heavy metal pollution ,Modified clay minerals ,Passivation

总第507期

2018年第9期

金属矿山METAL MINE Series No.507September 2018收稿日期

2018-07-05基金项目

国家水体污染控制与治理科技重大专项项目(编号:2015ZX07205003)。作者简介杨越晴(1993—),女,硕士研究生。通讯作者董颖博(1983—),女,副教授,博士,硕士研究生导师

据《2016中国环境状况公报》显示,我国耕地总面

积达13499.87万ha,其中评价为一等至三等的耕地面

积为3658.46万ha,仅占耕地总面积的27.07%;评价

为四等到六等的耕地面积占45.10%;评价为七等至十

等的耕地面积高达3752.96万ha,占耕地总面积的

27.83%,土壤污染状况总体不容乐观[1]。土壤污染类

型包括有机污染、无机污染和复合型污染,我国以无

机污染为主,无机污染物超标点位数占土壤污染超标点位总数的82.8%,其中,镉、汞、砷、铜、铅、铬、锌、镍8种重金属污染物点位超标率达21.7%[2]。据统计,由于矿山开采、金属冶炼、工业排放等原因,我国受砷、镉、汞、锌、铜等重金属污染的耕地面积约1000万ha,每年受重金属污染的粮食产量约1000万t,造成巨大的经济损失和食品安全隐患[3]。·

·33万方数据

相关主题
文本预览
相关文档 最新文档