Affecting factors, equilibrium, kinetics and thermodynamics of bromide removal from aqueous solutions by MIEX resin
作者： Lei Ding , Huiping Deng , Chao Wu , Xu Han
DOI: 10.1016/J.CEJ.2011.11.096
关键词: Inorganic chemistry 、 Exothermic process 、 Adsorption 、 Chemistry 、 Bromide 、 Sorption 、 Rate-determining step 、 Langmuir 、 Aqueous solution 、 Freundlich equation
摘要: Abstract It is necessary to remove bromide from raw water owing the fact that directly leads brominated disinfection byproducts during process for drinking water. The adsorption characteristics of by MIEX resin are investigated in a batch mode. Some factors such as initial concentration, contact time, adsorbent dosage, pH solution and coexistent anions, have significant effect on removal. Five isotherm models, namely, Langmuir, Freundlich, Temkin, Dubinin–Radushkevich Redlich–Peterson, used fit equilibrium data at 303 K. results show can be well fitted Freundlich Redlich–Peterson models. pseudo first-order second-order kinetics models resin. demonstrate agree with model, indicating chemical sorption. intra-particle diffusion model further analyze mechanism process. imply not only rate limiting step. negative Δ G ° values indicate thermodynamically feasible spontaneous H S an exothermic nature randomness degree solid/liquid interface decreases after adsorption.
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