农业资源与环境学报2017，Vol.34Issue(1)：38-46,9.DOI:10.13254/j.jare.2016.0208
膨润土对轻度镉污染土壤钝化修复效应研究
Immobilization and Remediation of Low-level Cd Contaminated Soil Using Bentonite
摘要
Abstract
Pot experiments and field trials were conducted to investigate the effects of bentonite on immobilization and remediation of low-level Cd contaminated soils. The results showed that under pot and field experiments the concentrations of exchangeable Cd after applied bentonite to soils decreased by 41.3%~86.1%and 7.9%~24.6%, respectively, when compared with the control group, while the contents of Fe-Mn oxides(OX)and residual(RES)fraction of Cd were increased. Cd concentration in the parts of Oryza sativa L. decreased with the increment of bentonite, with the maximal Cd reduction of 46.0%, 49.8%, 54.2%and 71.8%, respectively under pot experiment and of 35.3%, 48.8%, 36.0%and 40.9%, respectively under field experiments in roots, stems, leaves and brown rice in contrast to the CK. SOD and soluable protein(SP)in leaves of rice seedlings was enhanced to some extents, but POD and MDA were significantly inhibited(P<0.05). The ac-tivities of catalase were remarkably increased under bentonite treated soils(P<0.05). On the contrary, the invertase activity in pot exper-iments was significantly prohibited(P<0.05), with the reduction of 44.3%~52.3%in comparison with the control. However, there was no significant difference among the treatments of bentonite under field trials(P>0.05). The activities of urease first decreased and then increased with the increasing of bentonite contents.关键词
膨润土/镉/钝化修复/水稻/土壤Key words
bentonite/cadmium/immobilization and remediation/Oryza sativa L./soil分类
资源环境引用本文复制引用
徐奕,赵丹,徐应明,孙约兵..膨润土对轻度镉污染土壤钝化修复效应研究[J].农业资源与环境学报,2017,34(1):38-46,9.基金项目
公益性行业（农业）科研专项（201203045）；天津市科技支撑计划重点项目（14ZCZDSF00004）；天津市农业科技成果转化与推广项目 （）
