Enhanced removal of three phenols by laccase polymerization with MF/UF membranes
Journal
Bioresource Technology
Journal Volume
99
Journal Issue
7
Pages
2293-2298
Date Issued
2008
Author(s)
Chen, S.-S.
Abstract
Guaiacol, catechol, m-cresol are common phenolic compounds presented in various industrial effluents but difficult to be removed by conventional wastewater treatment schemes. To elucidate mechanisms of enhanced membrane removal by laccase polymerization, different MF and UF membranes were employed in a cross-flow module for phenol concentration of 5 mM. With 2.98 IU/l of laccase applied at room temperature, guaiacol, catechol and m-cresol were polymerized to products of averaged molecular weight of 9600, 8350 and 5400 Da (Dalton), respectively. Methoxy and hydroxyl-substituted phenols (guaiacol and catechol) were polymerized better than methyl-substituted phenol (m-cresol) due to more stable free-radical containing intermediate structure induced by oxygen-containing methoxy and hydroxyl functional groups. Removal efficiencies for the un-reacted phenols were dependent on the molecular sizes (length and width), but were dependent on the molecular weight for the polymerized phenolic compounds. Flux was declined initially but reached steady state after 180 min of filtration, indicating these MF/UF membranes can be used for removal of these polymerized phenols without significant fouling. In addition, pretreatments by the inactivated laccase only caused further flux reduction without additional removal of phenols. © 2007 Elsevier Ltd. All rights reserved.
Subjects
Catechol; Guaiacol; Laccase; m-Cresol; Membrane
SDGs
Other Subjects
Concentration (process); Phenols; Polymeric membranes; Polymerization; Catechol; Guaiacol; Laccase; Wastewater treatment; catechol; guaiacol; laccase; meta cresol; Concentration (process); Phenols; Polymeric membranes; Polymerization; Wastewater treatment; enzyme activity; filtration; free radical; phenol; pollutant removal; polymerization; size; wastewater; water treatment; article; Aspergillus; concentration (parameters); controlled study; crossflow filtration; membrane filter; molecular size; molecular weight; nonhuman; polymerization; priority journal; room temperature; substitution reaction; waste water management; Biopolymers; Chromatography, Gel; Laccase; Membranes, Artificial; Phenols
Type
journal article