Lestan Domen, Luo Chun-ling, Li Xiang-dong
Agronomy Department, Centre for Soil and Environmental Science, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia.
Environ Pollut. 2008 May;153(1):3-13. doi: 10.1016/j.envpol.2007.11.015. Epub 2007 Dec 26.
This paper reviews current remediation technologies that use chelating agents for the mobilization and removal of potentially toxic metals from contaminated soils. These processes can be done in situ as enhanced phytoextraction, chelant enhanced electrokinetic extraction and soil flushing, or ex situ as the extraction of soil slurry and soil heap/column leaching. Current proposals on how to treat and recycle waste washing solutions after soil is washed are discussed. The major controlling factors in phytoextraction and possible strategies for reducing the leaching of metals associated with the application of chelants are also reviewed. Finally, the possible impact of abiotic and biotic soil factors on the toxicity of metals left after the washing of soil and enhanced phytoextraction are briefly addressed.
本文综述了当前利用螯合剂从污染土壤中活化和去除潜在有毒金属的修复技术。这些过程可以原位进行，如强化植物提取、螯合剂强化电动提取和土壤冲洗，也可以异位进行，如土壤泥浆提取和土壤堆/柱淋洗。文中还讨论了目前关于土壤冲洗后如何处理和循环利用废洗涤液的提议。同时也综述了植物提取中的主要控制因素以及减少与螯合剂施用相关的金属淋溶的可能策略。最后，简要阐述了非生物和生物土壤因素对土壤冲洗和强化植物提取后残留金属毒性的可能影响。
