https://scholars.lib.ntu.edu.tw/handle/123456789/341599
Title: | Enhanced removal of three phenols by laccase polymerization with MF/UF membranes | Authors: | CHUN-HAN KO Chen, S.-S. |
Keywords: | Catechol; Guaiacol; Laccase; m-Cresol; Membrane | Issue Date: | 2008 | Journal Volume: | 99 | Journal Issue: | 7 | Start page/Pages: | 2293-2298 | Source: | Bioresource Technology | 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. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-38849138073&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/341599 |
DOI: | 10.1016/j.biortech.2007.05.017 | SDG/Keyword: | 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 |
Appears in Collections: | 森林環境暨資源學系 |
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