Pulse Radiolysis and Transient Absorption of Aqueous Cr(VI) Solutions up to 325 °C

Jacy K Conrad; Aliaksandra Lisouskaya; David M Bartels

doi:10.1021/acsomega.2c04807

Pulse Radiolysis and Transient Absorption of Aqueous Cr(VI) Solutions up to 325 °C

ACS Omega. 2022 Oct 21;7(43):39071-39077. doi: 10.1021/acsomega.2c04807. eCollection 2022 Nov 1.

Authors

Jacy K Conrad¹, Aliaksandra Lisouskaya², David M Bartels²

Affiliations

¹ Center for Radiation Chemistry Research, Idaho National Laboratory, 1955 N. Fremont Ave., Idaho Falls, Idaho83415, United States.
² Notre Dame Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana46556, United States.

Abstract

Pulse radiolysis with a custom multichannel detection system has been used to measure the kinetics of the radiation chemistry reactions of aqueous solutions of chromium(VI) to 325 °C for the first time. Kinetic traces were measured simultaneously over a range of wavelengths and fit to obtain the associated high-temperature rate coefficients and Arrhenius parameters for the reactions of Cr(VI) + e _aq ^-, Cr(VI) + H^•, and Cr(V) + ^•OH. These kinetic parameters can be used to predict the behavior of toxic Cr(VI) in models of aqueous systems for applications in nuclear technology, industrial wastewater treatment, and chemical dosimetry.