EFFECTS OF CHELATORS AND SMALL ORGANIC ACIDS ON PHYTOEXTRACTION OF CD FROM SOIL WITH AMARANTHUS HYPOCHONDRIACUS L.
文献类型: 外文期刊
作者: Li, Ningyu 1 ; Li, Zhian 2 ; Fu, Qinglin 1 ; Zhuang, Ping 2 ; Guo, Bin 1 ;
作者机构: 1.Zhejiang Acad Agr Sci, Inst Environm Resource Soil & Fertilizer, Hangzhou 310021, Zhejiang, Peoples R China
2.Chinese Acad Sci, S China Bot Garden, Key Lab Vegetat Restorat & Management Degraded Ec, Guangzhou 510650, Guangdong, Peoples R China
关键词: Amaranth;cadmium;phytoremediation;organic acids;NTA;EDTA
期刊名称:FRESENIUS ENVIRONMENTAL BULLETIN ( 影响因子:0.489; 五年影响因子:0.479 )
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收录情况: SCI
摘要: The effects of the application of 3 mmol kg~(-1) synthetic chelators (ethylenediaminetetraacetic acid (EDTA) and ni-trilotriacetate (NTA)) and low molecular weight organic acids (LMWOAs: citric, malic and tartaric acid), respectively, on the uptake of Cd by two amaranth cultivars {Amaranthus hypochondriacus L. Cvs. K112 and R104) from soil contaminated with 5 mg kg~(-1) Cd were evaluated by pot experiments. The addition of EDTA increased the concentrations of Cd in leaves and stems of Kl 12 by 19.9 and 30%, and that of R104 by 24.3 and 148%, respectively. EDTA was more effective than NTA and LMWOAs at enhancing the accumulation of Cd in both amaranth cultivars. The application of NTA and citric acid significantly decreased the accumulation of Cd in both amaranth cultivars. Application of the LMWOAs had no effect on Cd phytoextraction, which might be due to the rapid degradation of LMWOAs. The results suggest that EDTA can increase phytoextraction of Cd from soil effectively by A. hypochondriacus, a high-biomass Cd-hyperaccumulator.
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