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Magnetic poly(acrylic acid)-based hydrogels for rapid ammonium sorption and efficient sorbent separation from sewage

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Environmental Science and Ecotechnology 2021年第2期6卷 21-27页

作者： Heidy Cruz Miriam Yap Gabon Sirajus Salehin Thomas Seviour Bronwyn Laycock ilje pikaar School of Civil Engineering The University of QueenslandBrisbaneQueensland4072Australia School of Chemical Engineering The University of QueenslandBrisbaneQueensland4072Australia WATEC Aarhus University Centre for Water Technology Nørrebrogade 44Bldg 17838000AarhusDenmark Advanced Water Management Center The University of QueenslandBrisbaneQueensland4072Australia Department of Civil and Environmental Engineering National University of Singapore1 Engineering Drive 2Singapore117576Singapore

Ammonium sorption and recovery processes typically take place in conventional packed columns,with a configuration that enables maximum sorption by the ***,batch or semi-continuous operations in packed columns have associated issues such as scaling and frequent backwashing requirements,which are economically *** an alternative,ammonium sorption could occur in well-mixed continuously stirred tanks,which would allow for the ammonium sorption process to be retrofitted in existing wastewater treatment plants,provided that efficient sorbent separation can be *** study demonstrates,for the first time,the preparation of magnetic poly(acrylic acid)-based(PAA)ammonium sorbents through the incorporation of magnetic(Fe_(3)O_(4))nanoparticles(MNP)produced via scalable and cost-effective electrochemical *** MNP and PAA hydrogels were synthesized independently and the MNPs subsequently integrated into the PAA hydrogel network by particle diffusion and physical *** adverse effects on swelling and ammonium sorption following immersion in either synthetic or real sewage were observed after MNPs were incorporated into the ***,PAA-MNP hydrogels demonstrated high ammonium sorption efficiencies(80-93%)in real sewage and achieved rapid ammonium recovery of 73±1.1% within 15 min of mild acid washing(pH 4)15 min at a maximum recovery.

关键词： Sewage Wastewater treatment Resource recovery Polymer hydrogels Ammonium recovery Magnetic nanoparticles

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