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J Korean Soc Environ Eng > Volume 37(11); 2015 > Article
J Korean Soc Environ Eng 2015;37(11): 642-648. doi: https://doi.org/10.4491/KSEE.2015.37.11.642
금속담지 활성탄의 인산염 흡착특성
황민진1, 황유식1, 이원태2
1안전성평가연구소 미래환경연구센터
2금오공과대학교 토목환경공학부
Phosphate Adsorption on Metal-Impregnated Activated Carbon
Min-Jin Hwang1, Yu Sik Hwang1, Wontae Lee2
1Future Environmental Research Center, Korea Institute of Toxicology
2Department of Civil & Environmental Engineering, Kumoh National Institute of Technology
Corresponding author  Yu Sik Hwang ,Tel: 055-750-3834, Fax: 055-750-3849, Email: yshwang@kitox.re.kr
Received: November 10, 2015;  Revised: November 26, 2015;  Accepted: November 30, 2015.  Published online: November 30, 2015.
ABSTRACT
Oak wood based activated carbon was modified with surface impregnation of Fe3+ and Al3+ metal ions mixture for enhancements of phosphate adsorption capacity in aqueous solution. The phosphate adsorption capacity of the prepared metal impregnated carbon (MC) was about 8 times higher than that of the original activated carbon (OC). Adsorption equilibrium capacities of the phosphate increased with increasing system temperature. The adsorption equilibrium isotherm of phosphate on the prepared MC could be represented by the Langmuir equation. Thermodynamic parameters also indicated that adsorption system was spontaneous and endothermic reaction. The internal diffusion coefficient was measured to analyze the adsorption behavior and kinetic rate. To determine the internal diffusion coefficient, pore diffusion model (PDM) was employed and the result was in good agreement with experimental data.
Key Words: Adsorption, Phosphate, Metal Impregnation, Activated Carbon
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