摘要
[目的]探究生物炭与超富集植物联合修复镉污染土壤的效果。[方法]采用盆栽试验模拟镉污染土壤,构建生物炭-超富集植物联合修复试验系统,考察不同生物炭添加量和植物种类对植物重金属吸收与土壤中重金属形态的影响,并通过复种农作物评价修复效果。[结果]水稻秸秆生物炭添加比例为1%时,能显著提高超富集植物对镉的富集作用,且与黑龙葵联合时对镉修复效果最好,对镉的富集量比黑龙葵单独修复提高了26.74%,且修复后复种作物镉含量也有显著降低。[结论]生物炭和超富集植物联合可以用于镉污染土壤的修复,为该技术的工程应用提供了科学依据和理论支持。
[Objective]The research aimed to explore the combined remediation of cadmium contaminated soil by biochar and hyperaccumulators.[Method]A pot experiment was conducted to simulate cadmium-contaminated soil,and a combined biochar/hyperaccumulators remediation system was established to investigate the effects of plant and biochar on heavy metal uptake by plant and heavy metal speciation in soil,and the remediation effect was evaluated by multiple cropping crops.[Result]When the proportion of rice straw biochar was 1%,the cadmium accumulation of plants was significantly improved,and the recovery effect was the best when combined with nightshade,which was 26.74% higher than that of nightshade alone.In addition,the cadmium content in the replanted crops was significantly reduced.[Conclusion]The biochar and hyperaccumulators can be used for remediation of cadmium contaminated soil,providing scientific references and theoretical support for the engineering application of this technology.
作者
司马小峰
孟玉
吴东彪
于鹏
沈贤城
李堃
SIMA Xiao-feng;MENG Yu;WU Dong-biao(Anhui Urban Construction Design and Research Institute Co.,Ltd.,Hefei,Anhui 230051;University of Science and Technology of China,Hefei,Anhui 230026)
出处
《安徽农业科学》
CAS
2021年第6期80-84,共5页
Journal of Anhui Agricultural Sciences
基金
合肥市2018年博士后工作站科研项目(合人社秘〔2018〕548号)。
关键词
镉
联合修复
生物炭
超富集植物
土壤
Cadmium
Combined remediation
Biochar
Hyperaccumulators
Soil
