The Effect of Predisinfection with Chlorine Dioxide on the Formation of Haloacetic Acids and Trihalomethanes in a Drinking Water Supply

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dc.contributor.authorHarris, Charissa Larineen
dc.contributor.committeecochairDietrich, Andrea M.en
dc.contributor.committeecochairHoehn, Robert C.en
dc.contributor.committeememberGallagher, Daniel L.en
dc.contributor.departmentEnvironmental Engineeringen
dc.date.accessioned2014-03-14T20:43:23Zen
dc.date.adate2001-08-15en
dc.date.available2014-03-14T20:43:23Zen
dc.date.issued2001-07-27en
dc.date.rdate2002-08-15en
dc.date.sdate2001-08-14en
dc.description.abstractIn an effort to maintain compliance with current and future United States Environmental Protection Agency regulations governing haloacetic acids (HAAs) and trihalomethanes (THMs), the Blacksburg, Christiansburg, VPI (BCVPI) Water Authority in Radford, Virginia elected to eliminate prechlorination and replace it with preoxidation using chlorine dioxide (ClO2). Prior to full-scale application at the BCVPI Water Treatment Plant, jar testing was done to determine the effects of ClO2 on the formation of HAAs and THMs. Jar testing results showed a significant reduction in THM formation potential when 2.0 mg/L ClO2 was applied to raw water and chlorination was delayed. Chlorine dioxide doses less than 2.0 mg/L were statistically insignificant in the reduction of THM formation potentials below samples that were prechlorinated according to the BCVPI Water Treatment Plant's current practice. Likewise, ClO2 did not alter HAA formation potentials in such a way that statistical differences could be detected between ClO2 pretreatment and prechlorination, even at a dose of 2.0 mg/L ClO2. The two inorganic byproducts of ClO2, chlorite and chlorate, were also measured following jar tests. Chlorite concentrations increased with an increased ClO2 dose, but remained below 1.0 mg/L. Chlorate was formed in all jar-test samples.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-08142001-093734en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-08142001-093734/en
dc.identifier.urihttp://hdl.handle.net/10919/34518en
dc.publisherVirginia Techen
dc.relation.haspartthesis.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectchlorine dioxideen
dc.subjectdisinfection byproductsen
dc.subjecthaloacetic acidsen
dc.subjecttrihalomethanesen
dc.titleThe Effect of Predisinfection with Chlorine Dioxide on the Formation of Haloacetic Acids and Trihalomethanes in a Drinking Water Supplyen
dc.typeThesisen
thesis.degree.disciplineEnvironmental Planningen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Engineeringen

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