Comparison of effects of multiple oxidants with an ultrasonic system under unified system conditions for bisphenol A degradation

Shiyu Sun, Yangmin Ren, Fengshi Guo, Yongyue Zhou, Mingcan Cui, Junjun Ma, Zhengchang Han, Jeehyeong Khim

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Bisphenol A (BPA) as a trace contaminant has been reported, due to widespread use in the plastics industry. This study applied the 35 kHz ultrasound (US) to activate four different common oxidants (H2O2, HSO5, S2O82−, and IO4) for BPA degradation. With increasing initial concentration of oxidants, the degradation rate of BPA increased. The synergy index confirmed that a synergistic relationship between US and oxidants. This study also examined the impact of pH and temperature. The results showed that the kinetic constants of US, US-H2O2, US-HSO5- and US-IO4decreased when the pH increased from 6 to 11. The optimal pH for US-S2O82− was 8. Notably, increasing temperature decreased the performance of US, US-H2O2, and US-IO4- systems, while it could increase the degradation of BPA in US-S2O82− and US-HSO5-. The activation energy for BPA decomposition using the US-IO4- system was the lowest, at 0.453nullkJnullmol−1, and the synergy index was the highest at 2.22. Additionally, the ΔG# value was found to be 2.11 + 0.29T when the temperature ranged from 25 °C to 45 °C. The main oxidation contribution is achieved by hydroxyl radicals in scavenger test. The mechanism of activation of US-oxidant is heat and electron transfer. In the case of the US-IO4- system, the economic analysis yielded 271 kwh m−3, which was approximately 2.4 times lower than that of the US process.

Original languageEnglish
Article number138526
JournalChemosphere
Volume329
DOIs
Publication statusPublished - 2023 Jul

Bibliographical note

Funding Information:
Funding: This work was supported by the Korean Ministry of the Environment as a Subsurface Environment Management ( SEM ) project (No. 2021002170003 ) and the Jiangsu Provincial Department of Science project (No. BZ2021026 ) and Jiangsu Provincial Nanjing City, Department of Science project ( No.202201002 ). We thank Dr. Yun Gyong Ahn (Korea Basic Science Institute, Western Seoul Center) for helpful discussions about the data analysis.

Funding Information:
Funding: This work was supported by the Korean Ministry of the Environment as a Subsurface Environment Management (SEM) project (No.2021002170003) and the Jiangsu Provincial Department of Science project (No. BZ2021026) and Jiangsu Provincial Nanjing City, Department of Science project (No.202201002). We thank Dr. Yun Gyong Ahn (Korea Basic Science Institute, Western Seoul Center) for helpful discussions about the data analysis.

Publisher Copyright:
© 2023 Elsevier Ltd

Keywords

  • Activation energy
  • Bisphenol A
  • Kinetics
  • Mechanism
  • Oxidant
  • Ultrasonic activation

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • General Chemistry
  • Pollution
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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