지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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The feasibility of using volcanic ash for lead ion removal from wastewater was evaluated. The adsorption experiments were carried out in batch tests using volcanic ash that was treated with either NaOH or HCl prior to the use. Volcanic ash dose, temperature and initial Pb(II) concentration were chosen as 3 operational variables for a $2^3$ factorial design. Ash dose and concentration were found to be significant factors affecting Pb(II) adsorption. The removal of Pb(II) was enhanced with increasing volcanic ash dose and with decreasing the initial Pb(II) concentration. Pb(II) adsorption on the volcanic ash surface was spontaneous reaction and favored at high temperatures. Calculation of Gibb's free energy indicated that the adsorption was endothermic reaction. The equilibrium parameters were determined by fitting the Langmuir and Freundlich isotherms, and Langmuir model better fitted to the data than Freundlich model. BTV(base-treated volcanic ash) showed the maximum adsorption capacity($Q_{max}$) of 47.39mg/g. A pseudo second-order kinetic model was fitted to the data and the calculated $q_e$ values from the kinetic model were found close to the values obtained from the equilibrium experiments. The results of this study provided useful information about the adsorption characteristics of volcanic ash for Pb(II) removal from aqueous solution.
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참고문헌 (22)
참고문헌 신청
Al-Asheh, S. / 2002 / Packed-bed sorption of copper using spent animal bones: factorial experimental design desorption and column regeneration / Adv. Environ. Res 6:221~227
Bailey, R. H. / 1998 / Efficacy of various inorganic sorbents / Poultry Sci 77:1623~1630
Box, G.E.P. / 2005 / Statistics for Experimenters, 2nd edition / Wiley Interscience
Chegrouche, S. / 2002 / Removal of Ga(Ⅲ) from aqueous solution by adsorption on activated bentonite using a factorial design / Water Res 36(11):2898~2904
Duygu K. / 2009 / Removal of boron from aqueous solutions by batch adsorption on calcined alunite using experimental design / J. Hazard. Mater 163:308~314
Bailey, R. H. / 1998 / Efficacy of various inorganic sorbents / Poultry Sci 77:1623~1630
Box, G.E.P. / 2005 / Statistics for Experimenters, 2nd edition / Wiley Interscience
Chegrouche, S. / 2002 / Removal of Ga(Ⅲ) from aqueous solution by adsorption on activated bentonite using a factorial design / Water Res 36(11):2898~2904
Duygu K. / 2009 / Removal of boron from aqueous solutions by batch adsorption on calcined alunite using experimental design / J. Hazard. Mater 163:308~314
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