Photolytic and photocatalytic alterations of humic substances in UV (254 nm) and Solar Cocentric Parabolic Concentrator (CPC) reactors

Remoundaki, E; Vidali, R; Kousi, P; Hatzikioseyian, A; Tsezos, M

dc.contributor.author	Remoundaki, E	en
dc.contributor.author	Vidali, R	en
dc.contributor.author	Kousi, P	en
dc.contributor.author	Hatzikioseyian, A	en
dc.contributor.author	Tsezos, M	en
dc.date.accessioned	2014-03-01T01:31:39Z
dc.date.available	2014-03-01T01:31:39Z
dc.date.issued	2009	en
dc.identifier.issn	0011-9164	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19869
dc.subject	Humic substances	en
dc.subject	Passive systems	en
dc.subject	Photocatalysis	en
dc.subject	Photolysis	en
dc.subject	Solar light irradiation	en
dc.subject	UV irradiation	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.classification	Water Resources	en
dc.subject.other	Drinking water	en
dc.subject.other	Drinking water treatment	en
dc.subject.other	Halogenated compounds	en
dc.subject.other	Humic substances	en
dc.subject.other	Immobilized catalysts	en
dc.subject.other	Initial concentration	en
dc.subject.other	Minimal energy	en
dc.subject.other	Parabolic concentrators	en
dc.subject.other	Passive systems	en
dc.subject.other	Photo-catalytic	en
dc.subject.other	Solar light irradiation	en
dc.subject.other	TiO	en
dc.subject.other	UV irradiation	en
dc.subject.other	Biochemistry	en
dc.subject.other	Catalysts	en
dc.subject.other	Chemicals removal (water treatment)	en
dc.subject.other	Concentration (process)	en
dc.subject.other	Corrosion prevention	en
dc.subject.other	Disinfection	en
dc.subject.other	Halogenation	en
dc.subject.other	Irradiation	en
dc.subject.other	Organic pollutants	en
dc.subject.other	Photocatalysis	en
dc.subject.other	Photodegradation	en
dc.subject.other	Photolysis	en
dc.subject.other	Solar concentrators	en
dc.subject.other	Solar energy	en
dc.subject.other	Water recycling	en
dc.subject.other	Potable water	en
dc.subject.other	biogenic material	en
dc.subject.other	catalysis	en
dc.subject.other	degradation	en
dc.subject.other	disinfection	en
dc.subject.other	drinking water	en
dc.subject.other	humic substance	en
dc.subject.other	irradiation	en
dc.subject.other	photolysis	en
dc.subject.other	solar radiation	en
dc.subject.other	ultraviolet radiation	en
dc.subject.other	water treatment	en
dc.subject.other	Animalia	en
dc.title	Photolytic and photocatalytic alterations of humic substances in UV (254 nm) and Solar Cocentric Parabolic Concentrator (CPC) reactors	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.desal.2009.08.002	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.desal.2009.08.002	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	Humic substances (HS) are formed during the degradation of plant and animal material, and both microbiological and abiotic processes contribute to their production. They impart a brown/yellow colour to water and can bind with metals and organic pollutants, affecting their mobility and bioavailability, and are precursors of mutagenic halogenated compounds in water formed after chlorination. Treatment of drinking water by UV irradiation is a successful disinfection technique. Passive systems for disinfection of drinking water based on minimal energy and materials consumption and exploiting only the available solar energy can be an alternative, mainly for remote and dispersed communities. This work presents results on the photolytic and photocatalytic (with TiO2) alterations of humic substances monitored in a UV254 nm reactor and a Solar Cocentric Parabolic Concentrator (CPC) reactor for drinking water treatment. For the UV254 nm reactor, photolysis of humic substances accounts for 80-90% and complete mineralization is achieved by the addition of small amounts of catalyst. For the CPC reactor, photolysis accounts for 60-70%. The reduction of humic substances initial concentrations may reach 80-90% for the runs of the reactor with immobilized catalyst and values of energy accumulated of 2 MJ m-2 L-1. © 2009.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Desalination	en
dc.identifier.doi	10.1016/j.desal.2009.08.002	en
dc.identifier.isi	ISI:000271141200108	en
dc.identifier.volume	248	en
dc.identifier.issue	1-3	en
dc.identifier.spage	843	en
dc.identifier.epage	851	en