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azu_td_hy_e9791_1988_516_sip1_w.pdf
Author
Lawson, Peter Ward,1963-Issue Date
1988Keywords
Hydrology.Groundwater -- Quality -- Arizona.
Artificial groundwater recharge -- Arizona.
Trihalomethanes.
Committee Chair
Bales, R. C.
Metadata
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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
Four batch and four column experiments were conducted to investigate the sorption of salicylic acid onto aluminum oxide. Nine column experiments were performed using fulvic acid as a sorbate, and aluminum oxide and a desert soil with a low fraction organic carbon (f(OC)) ( 0.009 percent) as sorbents. Batch experiments provided estimates of partition coefficient that were eight to ten times larger than column estimates. A two-site kinetic model was used to interpret the observed tailing of breakthrough curves. Kp estimates for fulvic acid on desert soil ranged from 3 to 23 cm³/g. The time scale of the desorption reaction is 12 days. The majority of the sorption sites appear to be kinetically controlled. Results suggest that recharge of untreated Central Arizona Project water through desert washes will remove only 10-15 percent of the fulvic acid present after two void volumes have infiltrated. This may eventually contaminate existing groundwater supplies with trihalomethane precursors.Type
Thesis-Reproduction (electronic)text
Degree Name
M.S.Degree Level
mastersDegree Program
Hydrology and Water ResourcesGraduate College