Abstract
Tetraphenylborate (TPB) will be used in the immoblization of high-level radioactive wastes in the U.S. Department of Energy's Defense Waste Processing Facility. This will be the first large-scale industrial application of TPB and information regarding its behavior in the environment is needed to assess the impact of potential contamination. Previous work indicated that TPB degrades via indirect photolysis initiated by humic substances in natural waters. In this study, the contribution of selected photo-generated reactive transient compounds were evaluated. Some of the degradation products of the reaction were also identified. The results indicate that reaction paths involving the super oxide anion (O 2-.) have a negligible contribution to humic acid sensitzed photolysis. Singlet oxygen ( 1O 2), generated by sunlight irradiation of a solution containing rose bengal, rapidly degraded TPB. However, the results from experiments evaluating the role of 1O 2 in TPB degradation in solutions containing humic acid were inconclusive. Triphenylboron, o-terphenyl, and bis-diphenylborinate were identified as degradation products in solvent extracts of irradiated solution using gas chromatography - mass spectrometry.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
