期刊
CHEMICAL ENGINEERING JOURNAL
卷 162, 期 3, 页码 919-926出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2010.06.043
关键词
Reactive Black 5; Anion exchangers; Sorption; Isotherms; Kinetics; Thermodynamics
The removal of Reactive Black 5 from aqueous solutions onto the strongly basic acrylic anion exchangers of type 1, namely Amberlite IRA-458 and Amberlite IRA-958 were investigated. According to the results, the equilibrium time was found to be 180 min for each Reactive Black 5-anion exchanger system. Adsorption experiments indicated that the amount of the dye adsorbed on both Amberlite IRA-458 and Amberlite IRA-958 was dependent on the initial dye concentration in the range of 50-500 mg/L. Modeling of kinetic results showed that the sorption process of the dye adsorption on both anion exchangers was best described by the pseudo second-order kinetic model in the entire investigated concentration domain. The effect of temperature on dye removal showed that the maximum capacity was obtained at 318 and 308 K for the dye adsorption on Amberlite IRA-458 and Amberlite IRA-958, respectively. The adsorption isotherm data were fitted well to the Langmuir isotherm and according to this model, Amberlite IRA-458 and Amberlite IRA-958 exhibited the highest monolayer sorption capacity of 1295.93 and 1723.964 mg/g. Various thermodynamic parameters, such as Delta G, Delta H and Delta S were evaluated and revealed that Reactive Black 5 adsorption process on both Amberlite IRA-458 and Amberlite IRA-958 was endothermic and favourable. (C) 2010 Elsevier B.V. All rights reserved.
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