Date of Graduation
Spring 5-20-2025
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Natural Sciences, Environmental Science
Thesis Chair
Walter Den
Abstract
UV light-activated persulfate degradation of diisopropylamine (DIPA) was explored as a means for improving water quality in product water derived from oil and natural gas produced water. A set of temperature swing solvent extraction (TSSE) tests was conducted to investigate the effect of varying ratios of DIPA to feed ratios on water recovery and conductivity and also to reinforce available data suggesting that TSSE may remove saline ions from synthetic produced water enough to improve water quality sufficient enough at sufficient quantities enough for reuse. TSSE may result in residual DIPA remaining in the product water. A three-part test to explore the removal of DIPA from synthetic product water consisted of: a heat-activated and UV-activated test both with a sample containing .01 M DIPA treated with .1 M persulfate, a sample containing .01 M DIPA treated with .3 M persulfate and a final UV-activated test with a sample containing 2% DIPA treated with .3 M persulfate.
The DIPA to feed ratio 5:1 generated a relatively moderate or high-water recovery with low conductivity under high saline conditions, while ratios 1:1 and 1:5 did not have a well-balanced performance in these metrics. Up to 99% DIPA was removed from the synthetic product water with smaller initial DIPA concentrations.
Recommended Citation
Soliz, Eric, "Removal of Diisopropylamine From Water Using Ultraviolet- and Thermal-Activated Persulfate Degradation" (2025). Masters Theses. 38.
https://digitalcommons.tamusa.edu/masters_theses/38