PHYTOEXTRACTION OF PB AND CU CONTAMINATED SOIL WITH MAIZE AND MICROENCAPSULATED EDTA

文献类型： 外文期刊

第一作者： Xie, Zhiyi

作者： Xie, Zhiyi;Chen, Nengchang;Liu, Chengshuai;Zheng, Yuji;Xu, Shengguang;Li, Fangbai;Xu, Yanling;Xie, Zhiyi;Xie, Zhiyi;Wu, Longhua

作者机构：

关键词： soil;Pb;Cu;phytoremediation;maize;microencapsulated EDTA

期刊名称：INTERNATIONAL JOURNAL OF PHYTOREMEDIATION （ 影响因子：3.212； 五年影响因子：3.275 ）

ISSN： 1522-6514

年卷期： 2012 年 14 卷 8 期

页码：

收录情况： SCI

摘要： Chelate-assisted phytoextraction using agricultural crops has been widely investigated as a remediation technique for soils contaminated with low mobility potentially toxic elements. Here, we report the use of a controlled-release microencapsulated EDTA (Cap-EDTA) by emulsion solvent evaporation to phytoremediate soil contaminated with Pb and Cu. Incubation experiments were carried out to assess the effect of Cap-and non-microencapsulated EDTA (Ncap-EDTA) on the mobility of soil metals. Results showed EDTA effectively increased the mobility of Pb and Cu in the soil solution and Cap-EDTA application provided lower and more constant water-soluble concentrations of Pb and Cu in comparison with. Phytotoxicity may be alleviated and plant uptake of Pb and Cu may be increased after the incorporation of Cap-EDTA. In addition phytoextraction efficiencies of maize after Cap- and Ncap-EDTA application were tested in a pot experiment. Maize shoot concentrations of Pb and Cu were lower with Cap-EDTA application than with Ncap-EDTA. However, shoot dry weight was significantly higher with Cap-EDTA application. Consequently, the Pb and Cu phytoextraction potential of maize significantly increased with Cap-EDTA application compared with the control and Ncap-EDTA application.

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