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11.
Keun-Young Lee Hyun-A Kim Woo-Chun Lee Soon-Oh Kim Jong-Un Lee Young-Ho Kwon Kyoung-Woong Kim 《Environmental geochemistry and health》2012,34(1):151-151
Electrokinetic process for remediation of a shooting-range site was evaluated in this study. By field operation for 100 days, the newly designed electrokinetic system was evaluated for process stability, performance, and efficiency. The field site of this study was an abandoned military shooting range located in the Civilian Control Line of South Korea. The target area, only, was heavily contaminated by Pb and Cu to a depth of 0.5 m. After dry-sieving of the field soil to separate particulate Pb, two cells in a hexagonal (two-dimensional) arrangement, including ten anodes outside the cell and two cathodes in the middle, were prepared. The pH of each electrolyte was adjusted by use of concentrated HNO3, resulting in acid-enhanced electrokinetics. The monitoring results indicated that overall removal of heavy metals (Pb, Cu) was achieved, and that both heavy metals were removed from outside the cell. The average final efficiency of removal of Pb and Cu was 39.5 ± 35 and 63.8 ± 12%, respectively. Although the feasibility of this system was confirmed, for commercialization of the process confirmed drawbacks must be improved by further study. 相似文献
12.
Lee KY Kim HA Lee WC Kim SO Lee JU Kwon YH Kim KW 《Environmental geochemistry and health》2012,34(Z1):151-159
Electrokinetic process for remediation of a shooting-range site was evaluated in this study. By field operation for 100 days, the newly designed electrokinetic system was evaluated for process stability, performance, and efficiency. The field site of this study was an abandoned military shooting range located in the Civilian Control Line of South Korea. The target area, only, was heavily contaminated by Pb and Cu to a depth of 0.5 m. After dry-sieving of the field soil to separate particulate Pb, two cells in a hexagonal (two-dimensional) arrangement, including ten anodes outside the cell and two cathodes in the middle, were prepared. The pH of each electrolyte was adjusted by use of concentrated HNO(3), resulting in acid-enhanced electrokinetics. The monitoring results indicated that overall removal of heavy metals (Pb, Cu) was achieved, and that both heavy metals were removed from outside the cell. The average final efficiency of removal of Pb and Cu was 39.5 ± 35 and 63.8 ± 12%, respectively. Although the feasibility of this system was confirmed, for commercialization of the process confirmed drawbacks must be improved by further study. 相似文献
13.
Mixed contamination by organic and inorganic compounds in soil is a serious problem for remediation. Most laboratory studies and field-scale trials focused on individual contaminant in the past. For concurrent bioremediation by biodegradation and bioleaching processes, we tested metal-reducing microorganism, Geobacter metallireducens. In order to prove the feasibility of the coupled process, multiple-contaminated soil was prepared. Mineralogical analyses have shown the existence of labile forms of As(V) as amorphous and/or weakly sorbed phases in the secondary Fe oxides. In the biotic experiment using G. metallireducens, biodegradation of toluene and bioleaching of As by bacteria were observed simultaneously. Bacteria accelerated the degradation rate of toluene with reductive dissolution of Fe and co-dissolution of As. Although there have been many studies showing each individual process, we have shown here that the idea of concurrent microbial reaction is feasible. However, for the practical use as a remediation technology, more details and multilateral evaluations are required in future studies. 相似文献
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