Comparison of natural organic acids and synthetic chelates at enhancing phytoextraction of metals from a multi-metal contaminated soil
Comparison of natural organic acids and synthetic chelates at enhancing phytoextraction of metals from a multi-metal contaminated soil
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DOI：
10.1016/j.envpol.2005.06.017
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发表时间：
2006-03-01
影响因子：
8.9
通讯作者：
Xing, BS
中科院分区：
文献类型：
--
作者：
do Nascimento, CWA;Amarasiriwardena, D;Xing, BS
化学辅助植物修复一直在发展，以诱导高生物量植物积累金属。合成螯合物已经显示出很高的效率来达到这一目标，但由于金属的过量溶解，它们在现场应用中造成了严重的缺陷。我们比较了人工合成的螯合物和天然低分子量有机酸(LMWOA)在促进印度芥菜(Brassica Jiea)从多金属污染的土壤中提取金属方面的性能。没食子酸和柠檬酸能诱导镉、锌、铜的去除。在不增加淋溶风险的情况下，从土壤中提取镍。LMWOA对这些金属的净去除作用与合成的螯合物一样多，一个主要原因是LMWOA的植物毒性较低。此外，提供适当的矿物质营养，增加生物量和金属的去除。(C)2005爱思唯尔有限公司。保留所有权利。
Chemically assisted phytoremediation has been developing to induce accumulation of metals by high biomass plants. Synthetic chelates have shown high effectiveness to reach such a goal, but they pose serious drawbacks in field application due to the excessive amount of metals solubilized. We compared the performance of synthetic chelates with naturally occurring low molecular weight organic acids (LMWOA) in enhancing phytoextraction of metals by Indian mustard (Brassica juncea) from multi-metal contaminated soils. Gallic and citric acids were able to induce removal of Cd, Zn, Cu. and Ni from soil without increasing the leaching risk. Net removal of these metals caused by LMWOA can be as much is Synthetic chelates, A major reason for this is the lower phytotoxicity of LMWOA. Furthermore, supplying appropriate mineral nutrient,, increased biomass and metal removal. (C) 2005 Elsevier Ltd. All rights reserved.