Removal of amoxicillin by UV and UV/H2O2 processes

Yeon Jung Jung, Wan Gi Kim, Yeojoon Yoon, Joonwun Kang, Young Min Hong, Hyun Wook Kim

Research output: Contribution to journalArticle

84 Citations (Scopus)

Abstract

The degradation of the β-lactam antibiotic amoxicillin (AM) treated with direct UV-C and UV/H2O2 photolytic processes was investigated in the present study. In addition, the antibacterial activity of the solution treated by UV/H2O2 advanced oxidation was compared with AM solution treated with ozone. The degradation rate of amoxicillin in both processes fitted pseudo first-order kinetics, and the rates increased up to six fold with increasing H2O2 addition at 10mM H2O2 compared to direct photolysis. However, low mineralization was achieved in both processes, showing a maximum of 50% TOC removal with UV/H2O2 after a reaction time of 80min (UV dose: 3.8×10-3EinsteinL-1) with the addition of 10mM H2O2. The transformation products formed during the degradation of amoxicillin in the UV and UV/H2O2 processes were identified by LC-IT-TOF analysis. In addition, microbial growth inhibition bioassays were performed to determine any residual antibacterial activity from potential photoproducts remaining in the treated solutions. An increase of the antibacterial activity in the UV/H2O2 treated samples was observed compared to the untreated sample in a time-based comparison. However, the UV/H2O2 process effectively eliminated any antibacterial activity from AM and its intermediate photoproducts at 20min of contact time with a 10mM H2O2 dose after the complete elimination of AM, even though the UV/H2O2 advanced oxidation process led to bioactive photoproducts.

Original languageEnglish
Pages (from-to)160-167
Number of pages8
JournalScience of the Total Environment
Volume420
DOIs
Publication statusPublished - 2012 Mar 15

Fingerprint

Amoxicillin
Degradation
degradation
oxidation
Oxidation
Bioassay
Photolysis
Antibiotics
photolysis
antibiotics
Ozone
bioassay
ozone
mineralization
fold
Lactams
kinetics
Kinetics
removal
Anti-Bacterial Agents

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

Cite this

Jung, Yeon Jung ; Kim, Wan Gi ; Yoon, Yeojoon ; Kang, Joonwun ; Hong, Young Min ; Kim, Hyun Wook. / Removal of amoxicillin by UV and UV/H2O2 processes. In: Science of the Total Environment. 2012 ; Vol. 420. pp. 160-167.
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Removal of amoxicillin by UV and UV/H2O2 processes. / Jung, Yeon Jung; Kim, Wan Gi; Yoon, Yeojoon; Kang, Joonwun; Hong, Young Min; Kim, Hyun Wook.

In: Science of the Total Environment, Vol. 420, 15.03.2012, p. 160-167.

Research output: Contribution to journalArticle

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