Optimization and Degradation Mechanism of Photocatalytic Removal of Bisphenol A Using Zn0.9Fe0.1S Synthesized by Microwave-assisted Method
| Autor: | Limin Hu, Qiao Wang, Peng Wang, Rongjun Su, Yanei Xue, Guangshan Zhang |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Bisphenol A Chromatography Sulfide 02 engineering and technology General Medicine 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry Microwave assisted 0104 chemical sciences chemistry.chemical_compound Volume (thermodynamics) chemistry Specific surface area Photocatalysis Degradation (geology) Physical and Theoretical Chemistry 0210 nano-technology Dissolution Nuclear chemistry |
| Zdroj: | Photochemistry and Photobiology. 92:775-782 |
| ISSN: | 0031-8655 |
| DOI: | 10.1111/php.12660 |
| Popis: | The sulfide photocatalyst of Zn0.9 Fe0.1 S was successfully synthesized by a facile microwave-assisted method, and Zn0.9 Fe0.1 S photocatalysts were characterized using SEM, EDX, XRD and BET. The specific surface area of synthesized Zn0.9 Fe0.1 S is 78.1 m2 g-1 , and total pore volume is 0.4 cm3 g-1 . With bisphenol A (BPA) as a target pollutant, photocatalytic system of UV + Zn0.9 Fe0.1 S + H2 O2 was set up. Some influencing parameters, including H2 O2 dosage, initial pH value, initial concentration of BPA and Zn0.9 Fe0.1 S dosage, were investigated, and the stability of the Zn0.9 Fe0.1 S was also studied during the photocatalysis. The optimum values of operating parameters were found at an initial pH value of 5.0, a H2 O2 dosage of 0.15 mmol L-1 and a Zn0.9 Fe0.1 S dosage of 0.08 g when the initial concentration of BPA was 10 mg L-1 . Under the optimal conditions, the highest removal rate of BPA achieved 95%. After seven consecutive reaction cycles, the degradation efficiency of BPA could still reach 85% and there was only a little dissolution of Zn2+ and Fe2+ . Compared with the traditional photo-Fenton system, the UV + Zn0.9 Fe0.1 S + H2 O2 system can not only improve the degradation efficiency of BPA, but also reduce the dosage of H2 O2 and thus reduce the processing cost. |
| Databáze: | OpenAIRE |
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