Soluble phosphorus removal through adsorption on spent alum sludge

Georgantas, DA; Matsis, VM; Grigoropoulou, HP

dc.contributor.author	Georgantas, DA	en
dc.contributor.author	Matsis, VM	en
dc.contributor.author	Grigoropoulou, HP	en
dc.date.accessioned	2014-03-01T01:25:10Z
dc.date.available	2014-03-01T01:25:10Z
dc.date.issued	2006	en
dc.identifier.issn	0959-3330	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17576
dc.subject	Elovich	en
dc.subject	Lagergren	en
dc.subject	Low cost adsorbent	en
dc.subject	Orthophosphate	en
dc.subject	Pseudo-second-order kinetics	en
dc.subject.classification	Environmental Sciences	en
dc.subject.other	aluminum potassium sulfate	en
dc.subject.other	phosphate	en
dc.subject.other	phosphorus	en
dc.subject.other	Adsorption	en
dc.subject.other	Chemicals removal (water treatment)	en
dc.subject.other	Chemisorption	en
dc.subject.other	pH	en
dc.subject.other	Phosphorus	en
dc.subject.other	Reaction kinetics	en
dc.subject.other	Sewage sludge	en
dc.subject.other	Wastewater treatment	en
dc.subject.other	X ray diffraction analysis	en
dc.subject.other	adsorption	en
dc.subject.other	orthophosphate	en
dc.subject.other	phosphorus	en
dc.subject.other	pollutant removal	en
dc.subject.other	sludge	en
dc.subject.other	wastewater	en
dc.subject.other	adsorption kinetics	en
dc.subject.other	article	en
dc.subject.other	controlled study	en
dc.subject.other	pH	en
dc.subject.other	precipitation	en
dc.subject.other	sludge treatment	en
dc.subject.other	waste component removal	en
dc.subject.other	waste water management	en
dc.subject.other	X ray diffraction	en
dc.subject.other	Adsorption	en
dc.subject.other	Alum Compounds	en
dc.subject.other	Hydrogen-Ion Concentration	en
dc.subject.other	Kinetics	en
dc.subject.other	Phosphates	en
dc.subject.other	Phosphorus	en
dc.subject.other	Sewage	en
dc.subject.other	Solubility	en
dc.subject.other	Waste Disposal, Fluid	en
dc.subject.other	Water Purification	en
dc.title	Soluble phosphorus removal through adsorption on spent alum sludge	en
heal.type	journalArticle	en
heal.identifier.primary	10.1080/09593332708618726	en
heal.identifier.secondary	http://dx.doi.org/10.1080/09593332708618726	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	In the present study freshly precipitated spent alum sludge [15-75 mg Al l(-1)] and alum [3-15 mg Al l(-1)] were tested and compared for their efficiency to remove phosphorus in synthetic wastewater [10mg P l(-1), 25 degrees C, pH=6] and it was proven that pure alum is much more efficient at phosphorus removal than the spent alum sludge. The effect of the pH on phosphorus removal efficiency was studied and it was proven that maximum orthophosphate removal is achieved in pH values 5-6 in both cases, alum and spent alum sludge, although alum is efficient in a wider pH range (4-7). The effect of aging [up to two months at 25 degrees C] on the efficiency of the spent sludge to remove phosphorus in synthetic wastewater was studied and it was proven that this efficiency is decreased through aging (up to 20% for 2 months aging). X-ray diffraction was used in order to examine whether this decrease is caused by changes in the structure of adsorbent and a mechanism was proposed to explain the above changes. Kinetics was investigated in the case of fresh and aged spent alum sludge and the pseudo-second-order chemisorption rate equation fits satisfactorily the experimental data [k: 0.286-1.048 g mmol(-1) min(-1), at 23-26 degrees C]. Finally, equilibrium was studied for fresh and aged spent alum sludge and the Freundlich isotherm fitted best the experimental data suggesting heterogeneous sorption [K-F=14.4-19.7, N: 0.13-0.20].	en
heal.publisher	SELPER LTD, PUBLICATIONS DIV	en
heal.journalName	Environmental Technology	en
dc.identifier.doi	10.1080/09593332708618726	en
dc.identifier.isi	ISI:000242447900003	en
dc.identifier.volume	27	en
dc.identifier.issue	10	en
dc.identifier.spage	1081	en
dc.identifier.epage	1088	en