Catalytic ozonation of thymol in reverse osmosis concentrate with core/shell Fe3O4@SiO2@Yb2O3 catalyst: Parameter optimization and degradation pathway

doi:10.1016/j.cjche.2016.10.017

›› 2017, Vol. 25 ›› Issue (5): 665-670.DOI: 10.1016/j.cjche.2016.10.017

• Energy, Resources and Environmental Technology • 上一篇下一篇

Catalytic ozonation of thymol in reverse osmosis concentrate with core/shell Fe₃O₄@SiO₂@Yb₂O₃ catalyst: Parameter optimization and degradation pathway

Liang Wang¹, Anqi Liu², Zhaohui Zhang^1,2, Bin Zhao^1,2, Yingming Xia², Yun Tan²

1 State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China;
2 Department of Environmental Engineering, Tianjin Polytechnic University, Tianjin 300387, China

收稿日期:2016-06-01 修回日期:2016-10-30 出版日期:2017-05-28 发布日期:2017-07-06
通讯作者: Zhaohui Zhang,E-mail address:zzh7448@126.com
基金资助:
Supported by the National Natural Science Foundation of China (51138008,51478314,51308391),the Key Project for Research and Development (2016YFC0400503),the Tianjin Science and Technology Program (14ZCDGSF00128),and the Natural Science Foundation of Tianjin (14JCQNJC09000).

Catalytic ozonation of thymol in reverse osmosis concentrate with core/shell Fe₃O₄@SiO₂@Yb₂O₃ catalyst: Parameter optimization and degradation pathway

Liang Wang¹, Anqi Liu², Zhaohui Zhang^1,2, Bin Zhao^1,2, Yingming Xia², Yun Tan²

1 State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China;
2 Department of Environmental Engineering, Tianjin Polytechnic University, Tianjin 300387, China

Received:2016-06-01 Revised:2016-10-30 Online:2017-05-28 Published:2017-07-06
Supported by:
Supported by the National Natural Science Foundation of China (51138008,51478314,51308391),the Key Project for Research and Development (2016YFC0400503),the Tianjin Science and Technology Program (14ZCDGSF00128),and the Natural Science Foundation of Tianjin (14JCQNJC09000).

摘要/Abstract

摘要： In this work, a novel catalyst of Fe₃O₄@SiO₂@Yb₂O₃ was prepared and the degradation of thymol in reverse osmosis concentrate using ozonation was explored. The operational parameters, such as ozone dosage (8-48 mg·min^-1), initial thymol concentration (20-100 mg·L^-1), initial pH value (3-11), and catalyst Fe₃O₄@SiO₂@Yb₂O₃ dosage (0.2-1.0 g), were studied focusing on the thymol degradation and COD removal. The results indicated that the increase in ozone dosage, initial pH value, and Fe₃O₄@SiO₂@Yb₂O₃ dosage accelerated the thymol degradation and COD removal, while the increase in initial thymol concentration hampered the effect of ozonation. A pathway of thymol degradation by catalytic ozonation was proposed based on the intermediates detected by gas chromatography-mass spectrometer and ion chromatography. This paper can provide basic data and technical alternative for pollutant removal from reverse osmosis concentrate by ozonation.

关键词: Catalysis, Ozonation, Wastewater, Thymol, Degradation pathway

Abstract: In this work, a novel catalyst of Fe₃O₄@SiO₂@Yb₂O₃ was prepared and the degradation of thymol in reverse osmosis concentrate using ozonation was explored. The operational parameters, such as ozone dosage (8-48 mg·min^-1), initial thymol concentration (20-100 mg·L^-1), initial pH value (3-11), and catalyst Fe₃O₄@SiO₂@Yb₂O₃ dosage (0.2-1.0 g), were studied focusing on the thymol degradation and COD removal. The results indicated that the increase in ozone dosage, initial pH value, and Fe₃O₄@SiO₂@Yb₂O₃ dosage accelerated the thymol degradation and COD removal, while the increase in initial thymol concentration hampered the effect of ozonation. A pathway of thymol degradation by catalytic ozonation was proposed based on the intermediates detected by gas chromatography-mass spectrometer and ion chromatography. This paper can provide basic data and technical alternative for pollutant removal from reverse osmosis concentrate by ozonation.

Key words: Catalysis, Ozonation, Wastewater, Thymol, Degradation pathway

Liang Wang, Anqi Liu, Zhaohui Zhang, Bin Zhao, Yingming Xia, Yun Tan. Catalytic ozonation of thymol in reverse osmosis concentrate with core/shell Fe₃O₄@SiO₂@Yb₂O₃ catalyst: Parameter optimization and degradation pathway[J]. , 2017, 25(5): 665-670.

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Catalytic ozonation of thymol in reverse osmosis concentrate with core/shell Fe₃O₄@SiO₂@Yb₂O₃ catalyst: Parameter optimization and degradation pathway

Catalytic ozonation of thymol in reverse osmosis concentrate with core/shell Fe₃O₄@SiO₂@Yb₂O₃ catalyst: Parameter optimization and degradation pathway

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