Degradation of organic filter 2-Phenylbenzidazole-5-Sulfonic acid by light-driven free chlorine process: Reactive species and mechanisms
Chemical Engineering Journal, ISSN: 1385-8947, Vol: 430, Page: 132684
2022
- 16Citations
- 3Captures
Metric Options: Counts1 Year3 YearSelecting the 1-year or 3-year option will change the metrics count to percentiles, illustrating how an article or review compares to other articles or reviews within the selected time period in the same journal. Selecting the 1-year option compares the metrics against other articles/reviews that were also published in the same calendar year. Selecting the 3-year option compares the metrics against other articles/reviews that were also published in the same calendar year plus the two years prior.
Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
Article Description
This study investigated the degradation of organic filter 2-phenylbenzidazole-5-sulfonic acid (PBSA) under ultraviolet and simulated sunlight activated free chlorine (UV/FC and SS/FC) in different water matrices. A mechanistic study revealed that ozone, HO •, Cl • and ClO • were responsible for PBSA degradation, and reactive chlorine species (RCS) played a major role. The developed mathematical model was utilized to estimate the rate constants of PBSA with representative radical species and predict the kinetics of PBSA attenuation well. Observed PBSA loss rate constants (k obs ) decrease with pH during UV/FC due to the high quantum yield and weak radical scavenging ability of hypochlorite (p K a = 7.5), while there is little difference under SS/FC. Furthermore, formation of reactive oxidants (HO •, Cl •, ClO • and ozone) during FC photolysis as a function of pH (5–10) were quantified with probe compounds. In seawater matrix, k obs for PBSA degradation under UV/FC (0.0109 min −1 ) was two times lower than that under SS/FC (0.0244 min −1 ) because the highly abundant HCO 3 –, Br - and Cl - exhibited a stronger inhibition (76%) for the former. A screening test showed that NaBr and NaBr + NaHCO 3 during SS/FC displayed the reinforcement effects, primarily due to the interaction between reactive bromine species and the imidazole moiety in PBSA. Based on these identified products, transformation pathways of PBSA included hydroxylation, ring cleavage and desulfonate. This work provided mechanistic insight into PBSA degradation by reactive species formed through FC photoactivation, and suggest a promise of SS/FC for efficient abatement of organic filters-caused seawater pollution for realistic application.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S1385894721042625; http://dx.doi.org/10.1016/j.cej.2021.132684; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85116629097&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S1385894721042625; https://dx.doi.org/10.1016/j.cej.2021.132684
Elsevier BV
Provide Feedback
Have ideas for a new metric? Would you like to see something else here?Let us know