摘要
生物炭可通过改变污染土壤中Cd的赋存状态进而影响其迁移转化来达到修复污染土壤的目的。在介绍生物炭概念的基础上,阐述生物炭对土壤中Cd迁移转化的可能机理,如阳离子-π键、离子交换、表面沉淀、表面络合和静电吸附等,着重探讨生物炭对Cd迁移转化的影响因素,如生物炭原料、热解温度、改性方法、生物施用量、生物炭老化、土壤类型及条件因子等,并分析影响原因,最后提出一些建议,如加强实际Cd污染土壤中生物炭的应用研究、构建影响因素与修复效果之间的模型、研究生物炭施用后潜在风险性以及土壤生态系统的变化,以期为Cd污染土壤修复提供一定的参考。
Biochar can change the existing state of Cd in contaminated soil and then affect its migration and transformation to achieve the purpose of remediation.On the basis of introducing biochar concept,the possible mechanism of biochar enhancing Cd immobilization was introduced,such as cation-πbond,ion exchange,surface precipitation,surface complexing,electrostatic interaction.The influencing factors of biochar on Cd migration and transformation were emphatically elaborated,such as biochar raw materials,pyrolysis temperature,modification methods,biological application amount,biochar aging,soil type and conditions.Finally,some suggestions were put forward,such as strengthening biochar application research in field Cd contaminated soil,constructing the model between influencing factors and remediation effect,studying the potential risk of biochar application and the change of soil ecosystem,so as to provide some reference for the remediation of Cd contaminated soil.
作者
谯华
黄文章
彭伟
原金海
王浩
QIAO Hua;HUANG Wen-zhang;PENG Wei;YUAN Jin-hai;WANG Hao(College of Chemistry and Chem-engineering,Chongqing University of Science and Technology,Chongqing 401331,China;Department of Military Installation,Army Logistics University of PLA,Chongqing 401311,China;College of Agriculture,Henan University of Science and Technology,Luoyang 471003,China)
出处
《当代化工》
CAS
2020年第11期2418-2422,共5页
Contemporary Chemical Industry
基金
国家重点研发计划项目,高原高寒地区应急净水方舱研发与应用示范(项目编号:2017YFC0806305)
重庆科技学院科研项目,生物炭的改性及其对农田污染土壤中镉迁移转化的影响研究(项目编号:ckrc2019053)
关键词
生物炭
CD污染土壤
机理
迁移转化
影响因素
Biochar
Cd contaminated soil
Mechanism
Migration and transformation
Influencing factors
