Chelate-Assisted Phytoremediation of Cu-Pyrene-Contaminated Soil Using Z. mays
Chelate-Assisted Phytoremediation of Cu-Pyrene-Contaminated Soil Using Z. mays
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DOI：
10.1007/s11270-014-2277-2
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发表时间：
2015-02
期刊：
影响因子：
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通讯作者：
Chibuike Chigbo;L. Batty
中科院分区：
文献类型：
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作者：
Chibuike Chigbo;L. Batty
以玉米为试材，研究了人工合成螯合物（乙二胺四乙酸-EDTA）、天然低分子量有机酸（柠檬酸）及其复配对铜-芘复合污染土壤的植物修复效果。在Cu和芘污染土壤中，EDTA和柠檬酸对植物生长的影响分别为43%和44%，而EDTA +柠檬酸对复合污染土壤中植物生长的影响为41%. EDTA和EDTA +柠檬酸分别增加了Cu污染和复合污染土壤中Cu的植物提取。在芘污染的土壤中，所有测试的螯合物增加芘的消散达到90.4%的柠檬酸，而在共污染的土壤中，只有柠檬酸或EDTA +柠檬酸促进芘的消散。这些结果表明Z.配合螯合剂可以有效地促进植物对Cu的提取和对芘的消解。
This study compares the efficiency of a synthetic chelate (ethylenediaminetetraacetic acid-EDTA), a natural low-molecular-weight organic acid (citric acid), and their combination for phytoremediation of Cu-pyrene co-contaminated soils.Zea mayswas grown in each soil and amended with citric acid and/or EDTA to understand the effect of chelates during phytoremediation of contaminated soils. In Cu or pyrene-contaminated soil, plant growth was negatively affected by EDTA (43 %) and citric acid (44 %), respectively, while EDTA + citric acid promoted (41 %) plant growth in co-contaminated soil. EDTA and EDTA + citric acid increased the phytoextraction of Cu in Cu-contaminated and co-contaminated soils, respectively. In pyrene-contaminated soil, all tested chelates increased the dissipation of pyrene reaching 90.4 % for citric acid, while in co-contaminated soil, only citric acid or EDTA + citric acid enhanced pyrene dissipation. These results show thatZ. mayscan be effective with the help of chelates in phytoextraction of Cu and dissipation of pyrene in co-contaminated soil.