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Optimization and Degradation Mechanism of Photocatalytic Removal of Bisphenol A Using Zn 0.9 Fe 0.1 S Synthesized by Microwave‐assisted Method
Author(s) -
Su Rongjun,
Xue Yanei,
Zhang Guangshan,
Wang Qiao,
Hu Limin,
Wang Peng
Publication year - 2016
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/php.12660
Subject(s) - bisphenol a , photocatalysis , degradation (telecommunications) , nuclear chemistry , chemistry , zinc , dissolution , microwave , analytical chemistry (journal) , catalysis , chromatography , organic chemistry , telecommunications , physics , quantum mechanics , computer science , epoxy
The sulfide photocatalyst of Zn 0.9 Fe 0.1 S was successfully synthesized by a facile microwave‐assisted method, and Zn 0.9 Fe 0.1 S photocatalysts were characterized using SEM, EDX, XRD and BET. The specific surface area of synthesized Zn 0.9 Fe 0.1 S is 78.1 m 2 g −1 , and total pore volume is 0.4 cm 3 g −1 . With bisphenol A (BPA) as a target pollutant, photocatalytic system of UV + Zn 0.9 Fe 0.1 S + H 2 O 2 was set up. Some influencing parameters, including H 2 O 2 dosage, initial pH value, initial concentration of BPA and Zn 0.9 Fe 0.1 S dosage, were investigated, and the stability of the Zn 0.9 Fe 0.1 S was also studied during the photocatalysis. The optimum values of operating parameters were found at an initial pH value of 5.0, a H 2 O 2 dosage of 0.15 mmol L −1 and a Zn 0.9 Fe 0.1 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 Zn 2+ and Fe 2+ . Compared with the traditional photo‐Fenton system, the UV + Zn 0.9 Fe 0.1 S + H 2 O 2 system can not only improve the degradation efficiency of BPA, but also reduce the dosage of H 2 O 2 and thus reduce the processing cost.