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http://dx.doi.org/10.7843/kgs.2011.27.4.043

Assessment of the Sorption Characteristics of Cadmium onto Steel-making Slag in Simulated Sea Water Using Batch Experiment  

Kim, Eun-Hyup (Dept. of Civil & Environ. Eng., Seoul National Univ.)
Rhee, Sung-Su (Waste to Energy Research Division, Environmental Resources Research Department, National Institute of Environmental Research)
Lee, Gwang-Hun (Seoul National Univ., Engrg. Research Institute)
Kim, Yong-Woo (Dept. of Civil & Environ. Eng., Seoul National Univ.)
Park, Jun-Boum (Dept. of Civil & Environ. Eng., Seoul National Univ.)
Oh, Myoung-Hak (Korea Ocean Research & Development Institute)
Publication Information
Journal of the Korean Geotechnical Society / v.27, no.4, 2011 , pp. 43-50 More about this Journal
Abstract
Steel-making slag was investigated as reactive material for removal of cadmium in coastal area. Batch experiments of the sorption isotherm experiment and kinetic sorption experiment were performed. Result of sorption isotherm was more adequately described by Langmuir model than Freundlich model and theoretical maximum capacity (${\beta}$) of cadmium onto steel-making slag was found. Results of kinetic sorption experiments were evaluated by pseudo second order model to investigate sorption characteristics of cadmium onto steel-making slag. Results showed that the equilibrium sorption amount of cadmium (q$q_e$) increased and the rate constant ($k_2$) and initial sorption rate (h) decreased as the initial cadmium concentration increased. The $q_e$ with simulated sea water was similar to that with deionized water and $k_2$ and h with simulated sea water was lower than those with deionized water. Results of kinetic experiments could be used to predict the result from sorption isotherm, since equilibrium sorption amounts calculated by pseudo second order model generally agreed with those measured from sorption isotherm. The reaction time for the target removal rate could be calculated by the pseudo second order model using kinetic sorption tests results.
Keywords
Cadmium; Pseudo second order model; Simulated sea water; Sorption; Steel-making slag;
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