Solar photocatalyzed red dye destruction using a titanium dioxide suspension

Persistent Link:
http://hdl.handle.net/10150/277805
Title:
Solar photocatalyzed red dye destruction using a titanium dioxide suspension
Author:
Sjogren, Jon Charles, 1953-
Issue Date:
1990
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The destruction of Direct-Red #79 textile dye in dilute aqueous solution was demonstrated by heterogeneous solar photocatalysis over suspended titanium dioxide. Dye oxidation and adsorption mechanisms, TiO2 photocatalysis, and external oxidant (H2O2) addition are discussed. Experimental data are presented which support previous studies reporting first order destruction of organic contaminants using recirculating batch reactor systems. The observance of optimum catalyst concentration, and reaction rate conformance to the Langmuir-Hinshelwood kinetic model were similar to results obtained by others. Dye destruction by free radicals was investigated. Evidence suggesting involvement of these processes is proposed by relating the rate of dye destruction to solution pH and alkalinity levels. Enhancement of dye destruction rate upon hydrogen peroxide addition was examined. Results of total organic carbon analyses, spectrophotometric absorbance measurements, and molecular weight estimations suggested the formation of reaction intermediates and indicated the extent of dye oxidation.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Engineering, Civil.; Engineering, Sanitary and Municipal.; Environmental Sciences.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College
Degree Grantor:
University of Arizona
Advisor:
Sierka, Raymond A.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleSolar photocatalyzed red dye destruction using a titanium dioxide suspensionen_US
dc.creatorSjogren, Jon Charles, 1953-en_US
dc.contributor.authorSjogren, Jon Charles, 1953-en_US
dc.date.issued1990en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe destruction of Direct-Red #79 textile dye in dilute aqueous solution was demonstrated by heterogeneous solar photocatalysis over suspended titanium dioxide. Dye oxidation and adsorption mechanisms, TiO2 photocatalysis, and external oxidant (H2O2) addition are discussed. Experimental data are presented which support previous studies reporting first order destruction of organic contaminants using recirculating batch reactor systems. The observance of optimum catalyst concentration, and reaction rate conformance to the Langmuir-Hinshelwood kinetic model were similar to results obtained by others. Dye destruction by free radicals was investigated. Evidence suggesting involvement of these processes is proposed by relating the rate of dye destruction to solution pH and alkalinity levels. Enhancement of dye destruction rate upon hydrogen peroxide addition was examined. Results of total organic carbon analyses, spectrophotometric absorbance measurements, and molecular weight estimations suggested the formation of reaction intermediates and indicated the extent of dye oxidation.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectEngineering, Civil.en_US
dc.subjectEngineering, Sanitary and Municipal.en_US
dc.subjectEnvironmental Sciences.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorSierka, Raymond A.en_US
dc.identifier.proquest1342987en_US
dc.identifier.bibrecord.b26623407en_US
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