A Study of the Precursors for Disinfection By-Products on the CAP Avra Valley Recharge Project

Persistent Link:
http://hdl.handle.net/10150/191344
Title:
A Study of the Precursors for Disinfection By-Products on the CAP Avra Valley Recharge Project
Author:
Lutz, Theresa Marie.
Issue Date:
2000
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:
Disinfection by-products (DBPs) can form when natural organic matter (NOM) reacts with chlorine disinfectants and bromide ions found in natural waters. This study was conducted at the Central Arizona Water Conservation District's Avra Valley Recharge Project site. Water samples were collected from recharge basins, wells and piezometers at the site during a fifteen-month period. The NOM was measured as TOC and DOC in untreated samples, whereas DBP-formation-potential was measured as the sum of five trihalomethanes and four haloacetic acids in disinfected water. Seven other inorganic constituents were also measured to quantify water quality changes associated with recharge. Significantly lower NOM concentrations were observed for the samples collected from recovery wells that had TDS and chloride levels similar to the Central Arizona Project (CAP) water source. However, the NOM concentrations in vadose zone water samples were much closer to the levels in CAP water. This suggests that some NOM is being removed from the CAP water during recharge though processes other than dilution (mixing). Recovered and disinfected recharged CAP water produced proportionally (relative to NOM) lower but significant amounts of DBPs in the vadose zone and groundwater water samples. The data from this study and from two other CAP recharge projects suggest that NOM levels will continue to increase in the vadose and aquifer zones influenced by recharged CAP water.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Disinfection and disinfectants -- By-products.; Artificial groundwater recharge -- Arizona -- Avra Valley.; Water-supply -- Arizona -- Avra Valley.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Soil, Water and Environmental Science; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Artiola, Janick

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleA Study of the Precursors for Disinfection By-Products on the CAP Avra Valley Recharge Projecten_US
dc.creatorLutz, Theresa Marie.en_US
dc.contributor.authorLutz, Theresa Marie.en_US
dc.date.issued2000en_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.abstractDisinfection by-products (DBPs) can form when natural organic matter (NOM) reacts with chlorine disinfectants and bromide ions found in natural waters. This study was conducted at the Central Arizona Water Conservation District's Avra Valley Recharge Project site. Water samples were collected from recharge basins, wells and piezometers at the site during a fifteen-month period. The NOM was measured as TOC and DOC in untreated samples, whereas DBP-formation-potential was measured as the sum of five trihalomethanes and four haloacetic acids in disinfected water. Seven other inorganic constituents were also measured to quantify water quality changes associated with recharge. Significantly lower NOM concentrations were observed for the samples collected from recovery wells that had TDS and chloride levels similar to the Central Arizona Project (CAP) water source. However, the NOM concentrations in vadose zone water samples were much closer to the levels in CAP water. This suggests that some NOM is being removed from the CAP water during recharge though processes other than dilution (mixing). Recovered and disinfected recharged CAP water produced proportionally (relative to NOM) lower but significant amounts of DBPs in the vadose zone and groundwater water samples. The data from this study and from two other CAP recharge projects suggest that NOM levels will continue to increase in the vadose and aquifer zones influenced by recharged CAP water.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshDisinfection and disinfectants -- By-products.en_US
dc.subject.lcshArtificial groundwater recharge -- Arizona -- Avra Valley.en_US
dc.subject.lcshWater-supply -- Arizona -- Avra Valley.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineSoil, Water and Environmental Scienceen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairArtiola, Janicken_US
dc.contributor.committeememberBrusseau, Marken_US
dc.contributor.committeememberRiley, Jamesen_US
dc.identifier.oclc213500495en_US
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