Variations in sludge organic composition and dewatering behaviors through visible light driven photocatalysis: In-situ O-2 generation

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dc.authorid0000-0001-6249-5529
dc.authorscopusid35176620600
dc.authorscopusid56273926500
dc.authorscopusid6602558250
dc.authorwosidTolga Tunçal, Dr/AAH-2487-2019
dc.contributor.authorTunçal, Tolga
dc.contributor.authorPala, Ayşegül
dc.contributor.authorUslu, Orhan
dc.date.accessioned2022-05-11T14:17:26Z
dc.date.available2022-05-11T14:17:26Z
dc.date.issued2018
dc.departmentFakülteler, Çorlu Mühendislik Fakültesi, Çevre Mühendisliği Bölümü
dc.description.abstractIn this research, carbon and nitrogen doped TiO2 nano-particles were successfully synthesized and immobilized onto inner surface of a tubular thin film reactor (TTFR). CO3-NxOy-TiO2 nano-composite thin films (NCTF(s)) were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM-EDX), atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS). Characterization results indicated that the CO3-NxOy-TiO2 NCTF has a broad adsorption edge in the visible light region. Decorated TTFR was used to observe the impacts of visible light irradiation on sludge dewatering characteristics and organic structure. In the experiments, H2O2, NaOCl and their various gravimetric combinations were added to the sludge as electron acceptor combination (EAC). Obtained experimental results revealed a photocatalytic synergy between hydrogen peroxide and chlorite molecules. The optimum H2O2 and OCl mixing dosage for photocatalytic and photolytic experiments was determined to be 0.02 g H2O2 g(-1) DS and 4 x 10(-3) g(-1) NaOCl g(-1) DS, respectively. The pseudo-first order kinetic constants (k(obs)) for volatile solids (VS) removal observed in EAC(3) (with NCTF), EAC(2) (with NCTF) and photolysis were 0.140 min(-1), 0.045 min(-1) and 0.025 min(-1), respectively. The average VS removal rate depending on the applied unit photonic power to unit TTFR area was 218 +/- 14 mgVS(removed) W-1 h(-1) cm(-2). Experimental results obtained using different EAC(s) dosage schemes revealed that O-2 was the main active specie and HO radicals also contributed to sludge treatment. Naphthalene, pyrene, anthracene and phenanthrene were detected in raw sludge and removed 87 +/- 1% by the method.
dc.description.sponsorshipScientific and Technological Research Council of Turkey TUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [111Y209]; Cerkezkoy Organized Industrial Zone
dc.description.sponsorshipThis work is funded by The Scientific and Technological Research Council of Turkey TUBITAK (Project 111Y209) and Cerkezkoy Organized Industrial Zone.
dc.identifier.doi10.1016/j.jece.2018.07.023
dc.identifier.endpage7401
dc.identifier.issn2213-3437
dc.identifier.issue6en_US
dc.identifier.scopus2-s2.0-85049798373
dc.identifier.scopusqualityQ1
dc.identifier.startpage7395
dc.identifier.urihttps://doi.org/10.1016/j.jece.2018.07.023
dc.identifier.urihttps://hdl.handle.net/20.500.11776/6355
dc.identifier.volume6
dc.identifier.wosWOS:000452071800066
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorTunçal, Tolga
dc.language.isoen
dc.publisherElsevier Sci Ltd
dc.relation.ispartofJournal of Environmental Chemical Engineering
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectSludge management
dc.subjectDewatering
dc.subjectC,N doped TiO(2)thin films
dc.subjectVisible light
dc.subjectPAHs
dc.subjectSewage-Sludge
dc.subjectOxygen Vacancies
dc.subjectWaste
dc.subjectPollutants
dc.subjectRemoval
dc.titleVariations in sludge organic composition and dewatering behaviors through visible light driven photocatalysis: In-situ O-2 generation
dc.typeArticle

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