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Simultaneous Removal of Phenol and Pb2+ from the Mixed Solution by Zwitterionic Poly(sulfobetaine methacrylate)-Grafted Poly(vinylbenzyl chloride) Microspheres

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journal contribution
posted on 10.03.2020, 19:24 authored by Hanzhi Wang, De-Bin Jiang, Juntao Gu, Like Ouyang, Yu-Xin Zhang, Shaojun Yuan
Simultaneous effective removal of phenol and Pb2+ pollutants from their mixed aqueous solution was accomplished by zwitterionic poly­(sulfobetaine methacrylate) (PSBMA)-grafted poly­(vinylbenzyl chloride) microspheres synthesized by surface-initiated atom transfer radical polymerization. Batch adsorption studies were carried out in the single-component and mixed binary systems to determine the interaction effect of the Pb2+ and phenol adsorption on the as-synthesized bifunctional adsorbents. The adsorption kinetics of phenol and Pb2+ were demonstrated to be consistent with the pseudo-second-order kinetic model. The maximum adsorption capacities of Pb2+ and phenol, which were derived from Langmuir fitting, in the mixed binary system reached as high as about 0.99 and 1.43 mmol/g at pH 5 and 298.15 K, respectively. The phenol adsorption capacity was found to be substantially enhanced in the mixed binary system relative to the corresponding single-component system. The postulated adsorption mechanism of zwitterionic adsorbents for Pb2+ and phenol was caused by electrostatic interactions, hydrogen bond, and surface complexation.

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