Wang Xin, Wang Ying, Mahmood Qaisar, Islam Ejazul, Jin Xiaofen, Li Tingqiang, Yang Xiaoe, Liu Dan
Zhejiang Forestry University, College of Landscape Architecture, Lin'an, China.
J Hazard Mater. 2009 Aug 30;168(1):530-5. doi: 10.1016/j.jhazmat.2009.02.074. Epub 2009 Feb 23.
Present study reports the results of three pot experiments, conducted to investigate the chelate-assisted phytoextraction of Pb contaminated soils. The optimum phytoextraction was observed when 2.5mM ethylene diamine disuccinic acid (EDDS) was added in single dosage for 14 days to low Pb soil (treated with 400 mg kg(-1)soil). On the contrary, for high Pb soil (treated with 1200 mg kg(-1)soil), 5mM EDDS concentration in single dosage for 10 days produced better results. Post-harvest effects of EDDS on the concentrations of available Pb and dissolved organic carbon (DOC) were significantly higher as compared with check (CK i.e. without EDDS addition), and consequently decreased with the passage of time. Our results suggested that chelate-assisted phytoextraction was more suitable for slightly contaminated soils.
本研究报告了三项盆栽试验的结果，这些试验旨在研究螯合剂辅助植物提取铅污染土壤的情况。当向低铅土壤（用400 mg kg(-1)土壤处理）单次添加2.5 mM乙二胺二琥珀酸（EDDS）持续14天时，观察到最佳植物提取效果。相反，对于高铅土壤（用1200 mg kg(-1)土壤处理），单次添加5 mM EDDS浓度持续10天产生了更好的效果。与对照（CK，即不添加EDDS）相比，EDDS对有效铅和溶解有机碳（DOC）浓度的收获后影响显著更高，因此随时间推移而降低。我们的结果表明，螯合剂辅助植物提取更适合轻度污染的土壤。
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