Journal
OZONE-SCIENCE & ENGINEERING
Volume 39, Issue 1, Pages 24-32Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01919512.2016.1237280
Keywords
Ozone; Catalytic Ozonation; Composite Iron-Manganese Silicate Oxide; Hydroxyl Radical; Sulfamethoxazole
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Funding
- National Important Items of Science and Technology for the Control and Treatment of Water Pollution [2014ZX07405002]
- open funding project of the State Key Laboratory of Urban Water Resource and Environment (Harbin Institute of Technology) [2014TS03]
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Composite iron-manganese silicate oxide (FMSO) was synthesized and used as a heterogeneous catalyst for the ozonation of sulfamethoxazole. Results showed that FMSO/O-3 process significantly increased the TOC removal efficiency from 27% (sole ozonation) to 79.8%. Generated intermediates exhibited much higher adsorption affinity on FMSO than sulfamethoxazole. Presence of FMSO could accelerate the mass transfer of ozone, adsorb a certain amount of ozone on its surface, and subsequently decompose ozone into hydroxyl radical. Neutral charge surface of FMSO was more favorable to interact with the ozone molecules. FMSO maintained a good catalytic activity after several repeated use and revealed low metal ion leaching during ozonation.
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