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A Study on Soil Washing for Diesel-contaminated Soil by using Decomposition of NaOH/H$_2$O$_2$  

Hwang, Jong-Hyun (Department of Environmental Engineering, Pusan National University)
Choi, Won-Joon (Greenhouse Gas Research Center, Korea Institute of Energy Research)
Kim, Min-Chul (Office of Environmental Geology, Korea Rural Community & Agriculture Corporation)
Jung, Jong-Hyeon (Department of Health Administration Sorabol College)
Ha, Soo-Ho (Department of Natural Resources, Ministry of Environment)
Oh, Kwang-Joong (Department of Environmental Engineering, Pusan National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.30, no.10, 2008 , pp. 999-1005 More about this Journal
Abstract
The main reaction for soil washing with using sodium hydroxide(NaOH) and hydrogen peroxide(H$_2$O$_2$) was desorption and flotation of petrochemical contaminant by means of oxygen bubble. We found the rate of decomposition by rate constant according to various temperature. For the purpose of optimizing the operation factor, we examined the effect of concentration of NaOH and H$_2$O$_2$, washing time, and soil:water ratio. The rate of decomposition for H$_2$O$_2$ in liquid phase is the first order reaction by its concentration. The rate constant of k$_1$ was 0.9439 $\times$ exp(-1376.82/RT) when concentration of NaOH was lower than 0.1 M, and the rate constant of k$_2$ was 17.3588 $\times$ exp(-2320.06/RT) when it was higher than NaOH of 0.1 M. It found that NaOH was facilitated at the beyond of specific concentration. We confirmed the optimum concentration of NaOH/H$_2$O$_2$ by means of rate constants during soil washing. Also, the optimum conditions during soil washing were washing time of 15 min, soil : water ratio of 1 : 3, and NaOH/H$_2$O$_2$ concentration of 0.25 M/0.1 M.
Keywords
Soil Washing; Decomposition; Hydrogen Peroxide; Sodium Hydroxide;
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Times Cited By KSCI : 1  (Citation Analysis)
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