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Examination of zinc uptake in a combined system using sludge, minerals and ultrafiltration membranes

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dc.contributor.author Katsou, E en
dc.contributor.author Malamis, S en
dc.contributor.author Haralambous, K en
dc.date.accessioned 2014-03-01T01:33:27Z
dc.date.available 2014-03-01T01:33:27Z
dc.date.issued 2010 en
dc.identifier.issn 0304-3894 en
dc.identifier.uri http://hdl.handle.net/123456789/20428
dc.subject Fouling en
dc.subject Minerals en
dc.subject Sludge en
dc.subject Ultrafiltration membranes en
dc.subject Zinc removal en
dc.subject.classification Engineering, Environmental en
dc.subject.classification Engineering, Civil en
dc.subject.classification Environmental Sciences en
dc.subject.other Activated sludge en
dc.subject.other Adsorption process en
dc.subject.other Alkaline pH en
dc.subject.other Chemical precipitation en
dc.subject.other Combined system en
dc.subject.other Contact time en
dc.subject.other Diffusion process en
dc.subject.other Filtration process en
dc.subject.other Grain size en
dc.subject.other Industrial wastewaters en
dc.subject.other Initial concentration en
dc.subject.other Intra-particle diffusion en
dc.subject.other Membrane bioreactor en
dc.subject.other Membrane permeability en
dc.subject.other Mineral addition en
dc.subject.other Mixed liquor suspended solids en
dc.subject.other Natural minerals en
dc.subject.other pH value en
dc.subject.other Powder size en
dc.subject.other Removal efficiencies en
dc.subject.other Sludge flocs en
dc.subject.other Specific concentration en
dc.subject.other Two stage en
dc.subject.other Ultra-filtration membranes en
dc.subject.other Zinc concentration en
dc.subject.other Zinc ions en
dc.subject.other Zinc removal en
dc.subject.other Adsorption en
dc.subject.other Bentonite en
dc.subject.other Biological water treatment en
dc.subject.other Bioreactors en
dc.subject.other Biosorption en
dc.subject.other Clay minerals en
dc.subject.other Concentration (process) en
dc.subject.other Industrial water treatment en
dc.subject.other Membrane fouling en
dc.subject.other Membranes en
dc.subject.other Minerals en
dc.subject.other pH effects en
dc.subject.other Precipitation (chemical) en
dc.subject.other Silicate minerals en
dc.subject.other Ultrafiltration en
dc.subject.other Wastewater en
dc.subject.other Wastewater treatment en
dc.subject.other Water filtration en
dc.subject.other Zinc en
dc.subject.other Zinc compounds en
dc.subject.other Chemicals removal (water treatment) en
dc.subject.other bentonite en
dc.subject.other vermiculite en
dc.subject.other zeolite en
dc.subject.other zinc ion en
dc.subject.other activated sludge en
dc.subject.other bentonite en
dc.subject.other bioreactor en
dc.subject.other diffusion en
dc.subject.other fouling en
dc.subject.other grain size en
dc.subject.other membrane en
dc.subject.other mineral en
dc.subject.other permeability en
dc.subject.other pollutant removal en
dc.subject.other precipitation (chemistry) en
dc.subject.other reaction kinetics en
dc.subject.other suspended load en
dc.subject.other ultrafiltration en
dc.subject.other vermiculite en
dc.subject.other waste treatment en
dc.subject.other wastewater en
dc.subject.other zinc en
dc.subject.other activated sludge en
dc.subject.other adsorption en
dc.subject.other alkalinity en
dc.subject.other article en
dc.subject.other biosorption en
dc.subject.other controlled study en
dc.subject.other enzyme membrane bioreactor en
dc.subject.other grain en
dc.subject.other industrial waste en
dc.subject.other kinetics en
dc.subject.other liquid en
dc.subject.other membrane permeability en
dc.subject.other particle size en
dc.subject.other pH en
dc.subject.other precipitation en
dc.subject.other suspended particulate matter en
dc.subject.other ultrafiltration en
dc.subject.other waste water management en
dc.subject.other Adsorption en
dc.subject.other Hydrogen-Ion Concentration en
dc.subject.other Kinetics en
dc.subject.other Membranes, Artificial en
dc.subject.other Minerals en
dc.subject.other Sewage en
dc.subject.other Ultrafiltration en
dc.subject.other Zinc en
dc.title Examination of zinc uptake in a combined system using sludge, minerals and ultrafiltration membranes en
heal.type journalArticle en
heal.identifier.primary 10.1016/j.jhazmat.2010.05.101 en
heal.identifier.secondary http://dx.doi.org/10.1016/j.jhazmat.2010.05.101 en
heal.language English en
heal.publicationDate 2010 en
heal.abstract This work investigates the feasibility of zinc removal from wastewater with the use of ultrafiltration (UF) membranes combined with natural minerals and sludge. Activated sludge obtained from a membrane bioreactor (MBR) was enriched with initial zinc concentration of 320 mg/L and specific concentrations of zeolite, bentonite and vermiculite. The mixture was agitated and placed inside a batch ultrafiltration unit where the filtration process took place. The effect of several parameters on zinc removal was investigated including the mineral type, quantity and grain size, the metal-mineral contact time and the associated kinetics, the pH value, the zinc initial concentration and sludge mixed liquor suspended solids (MISS) concentration. The ultrafiltration membranes without any mineral addition were able to remove 38-78% of zinc ions due to biosorption on sludge flocs. The addition of minerals increased the Zn(II) removal efficiencies reaching in some cases more than 90%. Bentonite was the most effective mineral in zinc removal followed by vermiculite. Alkaline pH values favoured zinc removal due to enhanced chemical precipitation. A three-stage adsorption process was identified where the boundary layer diffusion process was followed by a two-stage intraparticle diffusion process. Powder size vermiculite was more effective than granular vermiculite in zinc removal. Minerals also resulted in membrane fouling mitigation since the membrane permeability drop was reduced. The combined sludge-mineral-ultrafiltration system can be effectively employed for the treatment of industrial wastewater. (C) 2010 Elsevier B.V. All rights reserved. en
heal.publisher ELSEVIER SCIENCE BV en
heal.journalName Journal of Hazardous Materials en
dc.identifier.doi 10.1016/j.jhazmat.2010.05.101 en
dc.identifier.isi ISI:000282240800004 en
dc.identifier.volume 182 en
dc.identifier.issue 1-3 en
dc.identifier.spage 27 en
dc.identifier.epage 38 en


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