曾超;王丹;付菊梅;姚天月;贺佳;李黎;代威;

• 1:西南科技大学生命科学与工程学院
• 2:西南科技大学核废物与环境安全国防重点实验室

摘要(Abstract)：

采用模拟Co污染土壤的方法,分别投加2.5 mmol/kg、5.0mmol/kg、7.5 mmol/kg的EDDS、NTA、CA和OA,研究了其对花生生长与吸收土壤重金属Co,以及对土壤中Co的活化能力的影响。结果表明:螯合剂处理使花生的生物量降低,在高浓度螯合剂处理时,降幅最大;EDDS的添加比NTA、CA和OA更显著地增加了土壤Co的有效态质量比,同时明显提高了花生的富集系数和转运能力;在螯合剂处理下,花生的转运系数最高达到0.916,具备了修复土壤重金属污染的能力;根系和地上部富集Co能力最强时分别达到58.64 mg/kg和46.33 mg/kg,是对照组的1.29和3.63倍;各处理花生根系中的Co质量比要高于茎叶中的质量比,花生植株Co质量比与土壤有效态Co质量比呈显著(p<0.05)或极显著相关(p<0.01);综合来看,螯合剂的投加能有效活化土壤溶液中的Co,促进植物吸收、转运重金属。

关键词(KeyWords)： 环境工程学;钴;螯合剂;花生;积累特征

Abstract:

Keywords:

基金项目(Foundation): 国家863计划项目(2012AA063503);; 四川省科技支撑计划项目(2012SZ0064)

作者(Authors): 曾超;王丹;付菊梅;姚天月;贺佳;李黎;代威;

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