• Study on Subcritical Water Degradation of RDX Contaminated Soil in Batch and Dynamic Mode
  • Choi, Jae-Heon;Lee, Hwan;Lee, Cheol-Hyo;Kim, Ju-Yup;Park, Jeong-Hun;Jo, Young-Tae;
  • Daeil Engineering and construction Co., Ltd;Daeil Engineering and construction Co., Ltd;Daeil Engineering and construction Co., Ltd;Daeil Engineering and construction Co., Ltd;Department of Environmental and Energy Engineering, Chonnam National University;Department of Environmental and Energy Engineering, Chonnam National University;
  • 배치형과 연속흐름형에 의한 토양 중 RDX의 아임계 분해특성 비교연구
  • 최재헌;이환;이철효;김주엽;박정훈;조영태;
  • 대일이앤씨;대일이앤씨;대일이앤씨;대일이앤씨;전남대학교 환경에너지공학과;전남대학교 환경에너지공학과;
Abstract
The purpose of this study is to compare the degradation characteristics by subcritical water of RDX contaminated soil using batch mode and dynamic mode devices. First, upon application of RDX contaminated soil, RDX treatment efficiency was increased with increasing the temperature in both modes. At 150℃, the treatment efficiency was 99.9%. RDX degradation efficiency got higher with lower ratio of solid to liquid. However, the treatment efficiency in the dynamic mode tended to be decreased at a certain ratio of solid to liquid or lower. The treatment efficiency was increased when it took longer time for the reactions in both modes. As the results of analysis on concentration of treated water after subcritical water degradation, the RDX recovery rate of dynamic and batch modes at 150℃ was 10.5% and 1.5%, respectively. However, both modes showed very similar recovery rates at 175℃ or higher. RDX degradation products were analyzed in treated water after it was treated with subcritical water. According to the results, RDX degradation mechanism was mostly oxidation reaction and reduction reaction was partially involved. Therefore, it suggested that most of RDX in soil was degraded by oxidation of subcritical water upon extraction. According to this result, it was found that both batch and dynamic modes were very effectively applied in the treatment of explosive contaminated soil.

Keywords: RDX;Subcritical water;Soil remediation;Batch;Dynamic;

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This Article

  • 2015; 20(6): 95-102

    Published on Nov 30, 2015

  • 10.7857/JSGE.2015.20.6.095
  • Received on Oct 1, 2015
  • Revised on Oct 22, 2015
  • Accepted on Nov 20, 2015