Degradation of β-blockers in hospital wastewater by means of ozonation and Fe2+/ozonation

Research output: Journal contributionsJournal articlesResearchpeer-review

Authors

This study investigates the degradation of the β-blockers in hospital wastewater by direct ozonation and Fe2+/ozonation with a focus on measurements at different initial pHs and Fe2+ concentrations, and the determination of kinetic constants. The results showed that these 'emerging contaminants' were completely degraded, when the removal rate of organic matter reached 30.6% and 49.1% for ozonation and Fe2+/ozonation, respectively. Likewise, the aromaticity removal rates were 63.4% and 77.9% for ozonation and Fe2+/ozonation, respectively. The experimental design showed that pH was the variable which had the greatest effect on the Fe2+/ozonation. The kinetic constants of atenolol, metoprolol and propranolol degradation by direct ozonation complied with pseudo-first-order conditions, while Fe2+/ozonation was suited to a biphasic degradation model. The kobs tended to rise when the pH increases; propranolol showed high kobs, which can be attributed to the naphthalene group (an electron-rich moiety). The identification of degradation products was carried out in aqueous solution using HPLC-MS2, followed by a suggestion of degradation pathways by means of ozonation. The degradation products proved to be dependent on the initial pH, and followed pathways that are based on direct ozonolysis and free radicals.

Original languageEnglish
JournalWater Research
Volume48
Issue number1
Pages (from-to)280-295
Number of pages16
ISSN0043-1354
DOIs
Publication statusPublished - 01.01.2014

    Research areas

  • β-blockers, Catalytic ozonation, Degradation pathways, Hospital wastewater, Ozonation
  • Chemistry

Recently viewed

Publications

  1. Telomere length is a strong predictor of foraging behavior in a long-lived seabird
  2. Online Network Impedance Identification with Wave-Package and Inter-Harmonic Signals
  3. Using authentic representations of practice in teacher education
  4. Giving is a question of time: response times and contributions to an environmental public good
  5. Model-based potential analysis of the distribution logistics:
  6. Revidierbarkeit, ein Muster der Hypersphäre
  7. Reconstructing the “biopiracy” debate from a justice perspective
  8. AAL-Onto
  9. The Persistence of Subsistence Agriculture
  10. Partitioning Behavior of Per- and Polyfluoroalkyl Compounds between Pore Water and Sediment in Two Sediment Cores from Tokyo Bay, Japan
  11. Crisis in Social Practices? Experiences from the Research Project "Blocked Transistion? Spaces of Thinking and Action in Sustainable Regional Development"
  12. Formative Assessment in Mathematics Instruction
  13. Assessing the environmental fate of S-metolachlor, its commercial product Mercantor Gold® and their photoproducts using a water-sediment test and in silico methods
  14. Briefe schreiben in der Sekundarstufe I
  15. Using meaningful places as an indicator for sense of place in the management of social-ecological systems
  16. Organizational Practices for the Aging Workforce
  17. Model predictive control of an electromagnetic actuator fed by multilevel PWM inverter
  18. Links between media communication and local perceptions of climate change in an indigenous society
  19. Evidence-Based Management and Organizational Reality
  20. Assessment of physical strain in younger and older subjects using heart rate and scalings of perceived exertion