화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.32, 178-186, December, 2015
DOI10.1016/j.jiec.2015.08.012  Export Citation
Influencing factors on sorption of TNT and RDX using rice husk biochar
Lakshmi Prasanna Lingamdinne, Hoon Roh, Yu-Lim Choi, Janardhan Reddy Koduru1, †, Jae-Kyu Yang2, and Yoon-Young Chang†
  • Department of Environmental Engineering, Kwangwoon University, Seoul 139-701, Republic of Korea
  • 1Graduate School of Environmental Studies, Kwangwoon University, Seoul 139-701, Republic of Korea
  • 2Division of General Education, Kwangwoon University, Seoul 139-701, Republic of Korea
E-mail:,
2,4,6-Trinitrotoluene (TNT) and 1,3,5-trinitro-1,3,5-triazacyclohexane (RDX) are the most commonly used nitro-organic explosives in contemporary military munitions, and readily be introduced into the environment, especially in groundwater supplies. In the present study, rice husk biochar (RHBC) prepared by pyrolysis at 700 ℃ was used for the treatment of TNT and RDX in waste water by batch sorption. The prepared RHBC chemical and physical characteristics were well characterized using analytical spectroscopic techniques. In order to develop the sorption mechanism of TNT and RDX onto RHBC, the factors influencing sorption were studied. The results demonstrated that TNT and RDX sorption depended on the pH value of the aqueous solution, and decreased as pH increased from 2.0 to 6.0 and was attributed with their pKa1 values along with their physical and chemical characteristics. The batch sorption results revealed that the sorption of the two explosives onto RHBC was rate limiting monolayer chemisorptions on homogeneous surface. These results suggested that the sorption of TNT and RDX occurs through weak electrostatic interactions as well as through charge transfer between - NO2 and ∏-∏ electrons of explosives and RHBC surface functional groups.
Keywords:Biochar;TNT;RDX;Kinetics equilibrium;Sorption mechanism
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