Grafting of alginates on UF/NF ceramic membranes for wastewater treatment

Athanasekou, CP; Romanos, GE; Kordatos, K; Kasselouri-Rigopoulou, V; Kakizis, NK; Sapalidis, AA

dc.contributor.author	Athanasekou, CP	en
dc.contributor.author	Romanos, GE	en
dc.contributor.author	Kordatos, K	en
dc.contributor.author	Kasselouri-Rigopoulou, V	en
dc.contributor.author	Kakizis, NK	en
dc.contributor.author	Sapalidis, AA	en
dc.date.accessioned	2014-03-01T01:33:34Z
dc.date.available	2014-03-01T01:33:34Z
dc.date.issued	2010	en
dc.identifier.issn	0304-3894	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20469
dc.subject	Acidic regeneration	en
dc.subject	Alginates	en
dc.subject	Grafting	en
dc.subject	Metal retention	en
dc.subject	Silanes	en
dc.subject	UF/NF membranes	en
dc.subject.classification	Engineering, Environmental	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Environmental Sciences	en
dc.subject.other	Alginate layer	en
dc.subject.other	Alginate solutions	en
dc.subject.other	Binding capacities	en
dc.subject.other	Cross flows	en
dc.subject.other	Filtration process	en
dc.subject.other	Flowthrough	en
dc.subject.other	Grafting	en
dc.subject.other	Grafting process	en
dc.subject.other	Heavy metal ion removal	en
dc.subject.other	Hybrid inorganic/organic	en
dc.subject.other	In-process	en
dc.subject.other	Membrane modification	en
dc.subject.other	Metal adsorption	en
dc.subject.other	Metal retention	en
dc.subject.other	Multi-layered	en
dc.subject.other	Regeneration capacity	en
dc.subject.other	Silanisation	en
dc.subject.other	Single pass	en
dc.subject.other	Transmembrane pressures	en
dc.subject.other	Water flux	en
dc.subject.other	Adsorption	en
dc.subject.other	Alginate	en
dc.subject.other	Ceramic membranes	en
dc.subject.other	Heavy metals	en
dc.subject.other	Hybrid materials	en
dc.subject.other	Metal ions	en
dc.subject.other	Metals	en
dc.subject.other	Nanofiltration	en
dc.subject.other	Silanes	en
dc.subject.other	Ultrafiltration	en
dc.subject.other	Wastewater	en
dc.subject.other	Wastewater reclamation	en
dc.subject.other	Wastewater treatment	en
dc.subject.other	Water treatment plants	en
dc.subject.other	Grafting (chemical)	en
dc.subject.other	alginic acid	en
dc.subject.other	cadmium	en
dc.subject.other	inorganic compound	en
dc.subject.other	organic compound	en
dc.subject.other	silane	en
dc.subject.other	adsorption	en
dc.subject.other	alginate	en
dc.subject.other	cation	en
dc.subject.other	ceramics	en
dc.subject.other	experimental study	en
dc.subject.other	heavy metal	en
dc.subject.other	membrane	en
dc.subject.other	pollutant removal	en
dc.subject.other	salinization	en
dc.subject.other	separation	en
dc.subject.other	ultrafiltration	en
dc.subject.other	wastewater	en
dc.subject.other	water flow	en
dc.subject.other	water treatment	en
dc.subject.other	adsorption	en
dc.subject.other	analytical parameters	en
dc.subject.other	article	en
dc.subject.other	ceramics	en
dc.subject.other	chemical modification	en
dc.subject.other	cross linking	en
dc.subject.other	crossflow filtration	en
dc.subject.other	hybrid	en
dc.subject.other	nanofiltration	en
dc.subject.other	preservation	en
dc.subject.other	regeneration	en
dc.subject.other	ultrafiltration	en
dc.subject.other	waste water management	en
dc.subject.other	Alginates	en
dc.subject.other	Ceramics	en
dc.subject.other	Membranes, Artificial	en
dc.subject.other	Metals, Heavy	en
dc.subject.other	Microscopy, Electron, Scanning	en
dc.subject.other	Water Pollutants, Chemical	en
dc.title	Grafting of alginates on UF/NF ceramic membranes for wastewater treatment	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jhazmat.2010.06.076	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.jhazmat.2010.06.076	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	The mechanism of heavy metal ion removal in processes involving multi-layered tubular ultrafiltration and nanofiltration (UF/NF) membranes was investigated by conducting retention experiments in both flow-through and cross-flow modes. The prospect of the regeneration of the membranes through an acidic process was also examined and discussed. The UF/NF membranes were functionalised with alginates to develop hybrid inorganic/organic materials for continuous, single pass, wastewater treatment applications. The challenge laid in the induction of additional metal adsorption and improved regeneration capacity. This was accomplished by stabilizing alginates either into the pores or on the top-separating layer of the membrane. The preservation of efficient water fluxes at moderate trans-membrane pressures introduced an additional parameter that was pursued in parallel to the membrane modification process. The deposition and stabilization of alginates was carried out via physical (filtration/cross-linking) and chemical (grafting) procedures. The materials developed by means of the filtration process exhibited a 25-60% enhancement of their Cd2+ binding capacity, depending on the amount of the filtered alginate solution. The grafting process led to the development of alginate layers with adequate stability under acidic regeneration conditions and metal retention enhancement of 25-180%, depending on the silane involved as grafting agent and the solvent of silanisation. (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.2010.06.076	en
dc.identifier.isi	ISI:000282240800080	en
dc.identifier.volume	182	en
dc.identifier.issue	1-3	en
dc.identifier.spage	611	en
dc.identifier.epage	623	en