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Role of trace TEMPO as electron shuttle in enhancing chloroquine phosphate elimination in UV-LED-driven persulfate activation process.
Sun, Qiyuan; Fan, Yongjie; Yang, Jing; Lu, Zhilei; Xu, Zeping; Lai, Xingteng; Zheng, Yuyi; Cai, Kaicong; Wang, Feifeng.
  • Sun Q; College of Environmental Science and Engineering, Fujian Normal University, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fuzhou, Fujian 350007, China.
  • Fan Y; College of Environmental Science and Engineering, Fujian Normal University, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fuzhou, Fujian 350007, China.
  • Yang J; College of Environmental Science and Engineering, Fujian Normal University, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fuzhou, Fujian 350007, China.
  • Lu Z; College of Environmental Science and Engineering, Fujian Normal University, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fuzhou, Fujian 350007, China.
  • Xu Z; College of Environmental Science and Engineering, Fujian Normal University, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fuzhou, Fujian 350007, China.
  • Lai X; College of Environmental Science and Engineering, Fujian Normal University, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fuzhou, Fujian 350007, China.
  • Zheng Y; College of Environmental Science and Engineering, Fujian Normal University, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fuzhou, Fujian 350007, China.
  • Cai K; College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, Fujian Normal University, Fuzhou 350007, China.
  • Wang F; Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen 361005, China.
J Environ Chem Eng ; 10(6): 108641, 2022 Dec.
Article in English | MEDLINE | ID: covidwho-2041923
ABSTRACT
Chloroquine Phosphate (CP) is an antiviral drug used for treatment of COVID-19. It is released into wastewater and eventually contaminates natural water. This study reports an effective homogeneous catalysis way for CP degradation by the 2,2,6,6-Tetramethylpiperidine-N-oxyl (TEMPO) enhanced persulfate (PDS) activation under UVB-LEDs irradiation at 305 nm. TEMPO at a low concentration (0.1 µM) enhanced CP degradation in UV305/PDS process in deionized water at different pHs, in different anions and different molecular weight dissolved organic matter solutions and in real surface water. The enhancement was verified to be attributed to the electron shuttle role of TEMPO, which promoted the yield of SO4 •- by enhancing electron donating capacity of the reacting system. The degradation products of CP and their acute toxicities suggested that UV305/PDS/TEMPO process has better performance on CP detoxification than UV305/PDS process. This study provides a new way to tackle the challenge of pharmaceutical pollutions in homogeneous photocatalysis process for natural water and sewage restoration.
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Full text: Available Collection: International databases Database: MEDLINE Language: English Journal: J Environ Chem Eng Year: 2022 Document Type: Article Affiliation country: J.jece.2022.108641

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Full text: Available Collection: International databases Database: MEDLINE Language: English Journal: J Environ Chem Eng Year: 2022 Document Type: Article Affiliation country: J.jece.2022.108641