文章基本信息

标题：The role of EDTA on cadmium phytoextraction in a cadmium-hyperaccumulator Rorippa globosa
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作者：Yuebing Sun ; Qixing Zhou ; Yingming Xu 等
期刊名称：Journal of Environmental Chemistry and Ecotoxicology
电子版ISSN：2141-226X
出版年度：2011
卷号：3
期号：3
页码：45-51
语种：English
出版社：Academic Journals
摘要：Enhanced phytoextraction technologies have been proposed as an effective approach to the decontamination of heavy metals in soils. In this study, the application of ethylene diamine tetraacetic acid (0.5 and 1.0 g/kg EDTA) at preflowering stage depressedRorippa globosagrowth and Cd uptake, the dry biomass, Cd concentration and total metal accumulation (TMC) of shoots at the concentration of 1.0 g/kg EDTA resulted in 39.6, 3.1 and 41.0% reduction, respectively, relative to the control. In contrast, when EDTA was added at flowering and mature stages, it facilitated plant production and Cd absorption. Especially for 1.0 g/kg EDTA applied at mature stage, the maximum of shoot dry biomass, Cd concentration, TMC and remediation ratio (RR) were obtained, which were 4.7 g/pot, 210.3 mg/kg, 982.4 µg/pot and 1.6, respectively. Therefore, the moderate concentration of EDTA (1.0 g/kg) applied at optimal growing stage (mature stage) ofR. globosawas more effective in increasing phytoextraction of Cd from contaminated soils.
关键词：EDTA; induced-phytoextraction; Cd-hyperaccumulator; Rorippa globosa.