JOCET 2013 Vol. 1(3): 220-223 ISSN: 1793-821X
DOI: 10.7763/JOCET.2013.V1.50
Abstract—This research aimed to investigate the applications of nanoscale zero valent iron particles (nZVI) in soil washing method to remediate or degrade TNT in the contaminated soil sample. The soil washing reactor was used in this study to determine TNT remediation in slurry soil with nZVI. TNT contaminated soil was divided into two sets. The first one was only washed with milli-Q water (1:2 w/v) and the other one was added with nZVI particles (250/1 nZVI/TNT ratio) before washing with milli-Q water. The reaction times in this experiment were varied between 0-100 minutes. The results of the experiment without added nZVI particles demonstrated that TNT removal efficiency was slightly increased with a maximal value of 11.89% at the time point of 100 minutes. In comparison, it was considerably increased up to 78.86% TNT removal efficiency of slurry soil in the experiment with added nZVI particles at the time point of 50 minutes before it was relatively constant afterward. In this study, the concentrations (mg/kg) of 2-ADNT and 4-ADNT as TNT metabolites in soil and wash water were also analyzed and presented. The results showed that the concentrations of 2-ADNT and 4-ADNT were found in washed soil in the system with added nZVI higher than those without added nZVI. It was possibly due to degradability of nZVI. The highest concentration was about 2 mg/kg of 2-ADNT in soil of washing system with nZVI at 40 minutes. Overall, the TNT metabolite formation showed quite fluctuation with a rapid increase in the first 40 minutes after that it was dropped. Meanwhile, there was no detection of 2-ADNT and 4-ADNT concentrations in wash water in both with and without added nZVI particles.
Index Terms—Soil washing system, Trinitrotoluene (TNT), Nanoscale Zero Valent Iron (nZVI), Removal efficiency.
R. Kosanlavit is with Institute of Science, Suranaree University of Technology. Nakhon Ratchasima, Thailand (e-mail: rk@sut.ac.th).
W. Jiamjitrpanich is with Nakhon Ratchasima Rajabhat University, Nakhon Ratchasima, Thailand (e-mail: warajj021@yahoo.com).
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Cite:Rachain Kosanlavit and Waraporn Jiamjitrpanich, "Efficiency of Nanoscale Zero Valent Iron in Soil Washing System for Removal of Trinitrotoluene," Journal of Clean Energy Technologies vol. 1, no. 3, pp. 220-223, 2013.
