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Single and binary adsorption of Cd (II) and Zn (II) ions from aqueous solutions onto bottom ash
Hatairat Sukpreabprom,Orn-anong Arqueropanyo,Wimol Naksata,Ponlayuth Sooksamiti,Sorapong Janhom 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.5
Bottom ash, a waste obtained from coal-burning power plant, was used as a low cost adsorbent for the removal of Cd (II) and Zn (II) ions from single and binary systems in batch experiments. The results of adsorption capacity showed that bottom ash could be considered as a potential adsorbent. The uptake of Zn (II) ion was greater than that of Cd (II) ion. For single adsorption, based on the correlation coefficient (R2) values, both Langmuir and Freundlich isotherms suitably described the adsorption equilibrium data in the initial metal ion concentration range of 10- 50 mg/L. The multicomponent isotherms, including the extended Langmuir and IAST-Freundlich isotherms, were used to predict the binary adsorption of Cd (II) and Zn (II) ions. Furthermore, the appropriate multicomponent isotherm was investigated by minimizing the average relative error (ARE) function. It should be confirmed that the extended Langmuir isotherm fitted the binary adsorption equilibrium data satisfactorily.
Effect of sodium dodecylbenzene sulfonate on the dispersion stability of ceramic glaze suspension
Suphapan Satchawan,Orn-anong Arqueropanyo,Wimol Naksata,Chairoj Rattanakawin,Sakdiphon Thiansem,Preecha Panya,Ponlayuth Sooksamiti,Peter J. Scales 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.6
Sodium dodecylbenzene sulfonate (SDBS) was used to render the stability of ceramic glaze dispersionwhich is composed of limestone, feldspar, quartz, kaolin and ferric oxide. The measured zeta potential showed negativevalues for the systems in deionized water and 0.001 M MgCl2 media at pH above 2, but a positive value was observedin 0.1M MgCl2 at pH higher than 6.7. Adsorption of SDBS in aqueous suspensions of ceramic glaze in deionized waterand in 0.001 M MgCl2, within the concentration range studied, followed both the Langmuir and Freundlich isotherms,but the Freundlich isotherm was more favored. Adsorption of SDBS in 0.1M MgCl2 corresponded to the Freundlichisotherm. From dispersion stability investigation, SDBS could render the suspension in deionized water and in 0.001mM MgCl2 more than in 0.1 mM MgCl2.