In situ remediation of soils contaminated with toxic metal ions using microwave energy
In situ remediation of soils contaminated with toxic metal ions using microwave energy
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DOI：
10.1016/s0045-6535(03)00572-1
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发表时间：
2003-12-01
期刊：
影响因子：
8.8
通讯作者：
Sinard, J
中科院分区：
文献类型：
--
作者：
Abramovitch, RA;Lu, C;Sinard, J
继我们利用微波能原位修复多环芳烃、多氯联苯和其他多氯有机化合物污染土壤的工作之后，我们现在报告对有毒金属离子Cd(II)、Mn(II)、Th(IV)、Cr(III)和主要是Cr(VI)污染土壤的原位修复的初步研究。土壤在这个过程中被部分玻璃化，用热(70摄氏度)35%硝酸提取4.5h，可以回收被添加到干净土壤中的非常少量的金属：Cd、Mn和Cr(III)完全固定(不可提取)，Th大部分不可提取，而Cr(VI)在非常高的添加水平下部分可提取，但使用美国EPA毒性特征浸出程序几乎完全无法提取。这表明，不打算用于农业用途的受污染土壤可以安全地修复到预定的深度，而不必担心有毒金属离子长时间渗出。(C)2003爱思唯尔有限公司。保留所有权利。
Following onto our work on the in situ remediation of soils contaminated with PAH's, PCB's and other polychlorinated organic compounds using microwave energy, we now report a preliminary investigation on the in situ remediation of soils contaminated with toxic metal ions: Cd(II), Mn(II), Th(IV), Cr(III) and mainly Cr(VI). The soil is partially vitrified in the process, and extraction with hot (70 degreesC) 35% nitric acid for 4.5 h leads to the recovery of very small amounts of the metals which had been spiked into the clean soil: Cd, Mn, and Cr(III) are completely immobilized (unextractable), Th is mostly unextractable, and Cr(VI) partially extractable at very high levels of spiking, but almost completely unextractable using the US EPA Toxicity Characteristic Leaching Procedure. This suggests that contaminated soils which are not going to be used for agricultural purposes can be remediated safely to preset depths without fear of the toxic metal ions leaching out for a long time. (C) 2003 Elsevier Ltd. All rights reserved.