Adsorption of Copper(II) by Ferric Hydroxide in Coal Mine Drainage Sludge: Equilibrium and Kinetics Modeling

탄광배수슬러지를 이용한 산성광산배수 중의 Cu(II) 흡착: 흡착평형 및 흡착속도 모델링

Kweon, Bo-Youn;Cui, Ming-Can;Lim, Jung-Hyun;Jang, Min;Shim, Yon-Sik;Khim, Jee-Hyeong
권보연;최명찬;임정현;장민;신연식;김지형

  • Published : 20081200

Abstract

This study investigates low-cost sorbent as replacements for current costly methods of removing heavy metals from AMD (acid mine drainage).This investigation explores the coal mine drain sludge, which is a by-product of AMD of Na-Jeon Mine. The coal drain sludge, which contains 64.7% ferric oxide (Fe2O3) as mainly component, was utilized as an adsorption for Cu(II) removal from aqueous solution. The equilibrium and kinetics adsorption was investigated during series of batch adsorption experiments. Langmuir and Freundlich models were used to fit the equilibrium data and Langmuir isotherm was fitted better. The removal efficiency was affected by pH, temperature, initial ion concentration, quantity of adsorbent and contact time. Two simple kinetic model, pseudo-first - and second -order, were used to investigate the adsorption mechanism. The pseudo- first -order reaction kinetics provides the best correlation with the experimental data. As the activation energy was 51.0 kJ mol-1 at pH 5.9, the adsorption of Cu(II) onto coal mine drainage sludge was by chemisorption

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References

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