Removal of sulfamonomethoxine and its transformation byproducts from fresh aquaculture wastewater by a rotating advanced oxidation contactor equipped with zeolite/TiO2 composite sheets
| Autor: | Youhei Nomura, Shuji Fukahori, Taku Fujiwara |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
021110 strategic
defence & security studies Environmental Engineering Chemistry General Chemical Engineering Composite number 0211 other engineering and technologies 02 engineering and technology 010501 environmental sciences 01 natural sciences Reaction rate constant Adsorption Chemical engineering Photocatalysis Environmental Chemistry Sulfamonomethoxine Degradation (geology) Safety Risk Reliability and Quality Zeolite 0105 earth and related environmental sciences Contactor |
| Zdroj: | Process Safety and Environmental Protection. 134:161-168 |
| ISSN: | 0957-5820 |
| DOI: | 10.1016/j.psep.2019.11.036 |
| Popis: | A novel rotating advanced oxidation contactor (RAOC) equipped with high-silica zeolite/TiO2 composite sheets was applied to remove sulfamonomethoxine (SMM) and its transformation byproducts from fresh aquaculture wastewater (FAWW). Adsorption and photocatalysis of SMM was not interfered by coexisting substances in the FAWW. The combination of adsorption and photocatalysis by the RAOC degraded SMM more rapidly than photocatalysis alone, possibly because of the synergetic effect. Moreover, the increase in UV fluence rate (UVFR) enhanced SMM degradation, and the linear relationship between UVFR (0.9–3.6 J/cm2/h) and the rate constant for SMM degradation was observed. The removal behavior of the transformation byproducts generated via hydroxylation of the aromatic ring of SMM was investigated, and their degradation was inhibited by the coexisting substances. The RAOC treatment was repeated five times without exchanging the composite sheets to evaluate the reusability of the composite sheet. The RAOC stably and completely eliminated SMM from the FAWW, showing the zeolite was regenerated by the photocatalysis of SMM adsorbed in the composite sheets. The results demonstrated that the RAOC effectively and stably removed SMM and its transformation byproducts from the FAWW. |
| Databáze: | OpenAIRE |
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