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The presented study investigated the characteristics and mechanism of zinc-ion containing wastewater treated by Granular Activated Carbon (GAC). GAC was pretreated by HCl with different concentrations to evaluate the influence of HCl on the specific surface area of GAC. Batch adsorption experiments were conducted to study the effects of pH, contact time, adsorbent dosage, co-existing ions, complexing agents and temperature. Kinetic studies revealed that the process of zinc-ion containing waste water treated by activated carbon is in confidence limits of both pseudo-first-order and pseudo-second-order model. The equilibrium data of zinc-ion containing waste water treated by activated carbon was fitted in Freundlich and Langmuir isotherm model and the R2 indicated that the Langmuir model fit better. The maximum monolayer adsorption capacity of zinc was 5.17 mg/g at an optimum pH 7. The Arrhenius activation energy for the adsorption of zinc onto GAC was 10.97 kJ/mol. The adsorption of zinc-ion was affected by Cu2+ more significantly. The adsorption capacity of zinc-ion by GAC was highly influenced by the existence of Nitrilotriacetic Acid (NTA).
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참고문헌 (25)
참고문헌 신청
Usman Farid, M. / 2017 / Increased adsorption of aqueous zinc species by Ar/O2 plasma-treated carbon nanotubes immobilized in hollow-fiber ultrafiltration membrane / Chemical Engineering Journal 325:239~248
Afroze, S. / 2016 / Adsorption removal of zinc (II) from aqueous phase by raw and base modified Eucalyptus sheathiana bark: Kinetics, mechanism and equilibrium study / Process Safety and Environmental Protection 102
Veli, S. / 2007 / Adsorption of copper and zinc from aqueous solutions by using natural clay / J Hazard Mater 149:226~233
Németh, G. / 2016 / Adsorption and chemical recipitation of lead and zinc from contaminated solutions in porous rocks: Possible application in environmental protection / Journal of African Earth Sciences 122:98~106
Huang, M. / 2017 / A novel approach for recipitation forecast via improved K-nearest neighbor algorithm / Advanced Engineering Informatics 33:89~95
Afroze, S. / 2016 / Adsorption removal of zinc (II) from aqueous phase by raw and base modified Eucalyptus sheathiana bark: Kinetics, mechanism and equilibrium study / Process Safety and Environmental Protection 102
Veli, S. / 2007 / Adsorption of copper and zinc from aqueous solutions by using natural clay / J Hazard Mater 149:226~233
Németh, G. / 2016 / Adsorption and chemical recipitation of lead and zinc from contaminated solutions in porous rocks: Possible application in environmental protection / Journal of African Earth Sciences 122:98~106
Huang, M. / 2017 / A novel approach for recipitation forecast via improved K-nearest neighbor algorithm / Advanced Engineering Informatics 33:89~95
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