Benzothiazole heterogeneous photodegradation in nano α-Fe2O3/oxalate system under UV light irradiation
| Autor: | Mei Pan, Xi Zhang, Xiangyun Han, Jinlong Yan, Lei Zhang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Radical
Oxalic acid 02 engineering and technology 010501 environmental sciences Tandem mass spectrometry 01 natural sciences Oxalate chemistry.chemical_compound Irradiation lcsh:Science Photodegradation degradation pathway 0105 earth and related environmental sciences Multidisciplinary transformation products benzothiazole 021001 nanoscience & nanotechnology Chemistry Benzothiazole chemistry Degradation (geology) lcsh:Q photodegradation 0210 nano-technology Nuclear chemistry Research Article |
| Zdroj: | Royal Society Open Science Royal Society Open Science, Vol 5, Iss 6 (2018) |
| ISSN: | 2054-5703 |
| Popis: | The photodegradation of benzothiazole (BTH) in wastewater with the coexistence of iron oxides and oxalic acid under UV light irradiation was investigated. Results revealed that an effective heterogeneous photo-Fenton-like system could be set up for BTH abatement in wastewater under UV irradiation without additional H 2 O 2 , and 88.1% BTH was removed with the addition of 2.0 mmol l −1 oxalic acid and 0.2 g l −1 α-Fe 2 O 3 using a 500 W high-pressure mercury lamp (365 nm). The degradation of BTH in the photo-Fenton-like system followed the first-order kinetic model. The photoproduction of hydroxyl radicals (·OH) in different systems was determined by high-performance liquid chromatography. Identification of transformation products by using liquid chromatography coupled with high resolution tandem mass spectrometry provided information about six transformation products formed during the photodegradation of BTH. Further insight was obtained by monitoring concentrations of the sulfate ion ( SO 4 2 − ) and nitrate ion ( NO 3 − ) , which demonstrated that the intermediate products of BTH could be decomposed ultimately. Based on the results, the potential photodegradation pathway of BTH was also proposed. |
| Databáze: | OpenAIRE |
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