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Adsorption of 3-Aminoacetanilide from aqueous solution by chemically modified hyper-crosslinked resins: Adsorption equilibrium, thermodynamics and selectivity

Wang, Tao, Shen, Chunhui, Wang, Nan, Dai, Jianjun, Liu, Zongtang, Fei, Zhenghao
Colloids and surfaces 2019 v.575 pp. 346-351
adsorbents, adsorption, aqueous solutions, endothermy, hydrochloric acid, models, pH, porosity, resins, sorption isotherms, surface area, thermodynamics
Herein a series of chemically modified hyper-crosslinked resins were prepared and the four resins had been employed to remove 3-Aminoacetanilide from aqueous solution. Pore size and BET specific surface area of the four resins were improved by characterization, and specific surface area size was SAMR > PRLMR > TAMR > IDLMR. The results showed that Freundlich model could fit the adsorption isotherms better than Tempkin and Langmuir equations. The adsorption process about 3-aminoacetanilide on the hyper-crosslinked resin was mainly physisorption, and the chemisorption was weak. Pseudo-second-order rate model fitted more suitable for the kinetic data and the pseudo-second-order constants suggested that the SAMR was more effective for the adsorption. Thermodynamic studies have shown that the adsorption processes were spontaneous and endothermic. Four resins exhibited maximum qe values at pH 8˜9. Column sorption experiment demonstrated that SAMR was a reliable adsorbent for the removal of 3-Aminoacetanilide in aqueous solutions and 10% (w/w) hydrochloric acid could desorb the 3-Aminoacetanilide efficiently.