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  • Measurement and Modeling of Setschenow Constants for Selected Hydrophilic Compounds in NaCl and CaCl

Measurement and Modeling of Setschenow Constants for Selected Hydrophilic Compounds in NaCl and CaCl

Accounts of chemical research (2017-06-07)
Aniela Burant, Gregory V Lowry, Athanasios K Karamalidis
ABSTRACT

Carbon capture, utilization, and storage (CCUS), a climate change mitigation strategy, along with unconventional oil and gas extraction, generates enormous volumes of produced water containing high salt concentrations and a litany of organic compounds. Understanding the aqueous solubility of organic compounds related to these operations is important for water treatment and reuse alternatives, as well as risk assessment purposes. The well-established Setschenow equation can be used to determine the effect of salts on aqueous solubility. However, there is a lack of reported Setschenow constants, especially for polar organic compounds. In this study, the Setschenow constants for selected hydrophilic organic compounds were experimentally determined, and linear free energy models for predicting the Setschenow constant of organic chemicals in concentrated brines were developed. Solid phase microextraction was employed to measure the salting-out behavior of six selected hydrophilic compounds up to 5 M NaCl and 2 M CaCl

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