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Performance of alkali and Cu-modified ZSM-5 during catalytic ozonation of polyvinyl alcohol in aqueous solution

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Abstract

A novel hierarchical Cu/ZSM-5 was prepared over alkaline treatment and incipient wet impregnation method for the catalytic ozonation of polyvinyl alcohol (PVA). Under the optimum preparation conditions, hierarchical Cu/ZSM-5 exhibited an excellent mineralization performance during the PVA degradation process, and the removal rate of TOC after 60 min of reaction was 47.86%, much higher than that of ozonation alone (5.40%). Its high catalytic activity could attribute to the large pore volume (0.27 cm3/g) and pore size (6.51 nm) which are beneficial for the distribution of loaded copper and adsorption performance for PVA. Compared to ·OH, 1O2 (2.66 times in 10 min) contributed more to the removal of PVA. The degradation of PVA was a combined process of direct ozone oxidation, catalytic ozonation and adsorption. With its high catalytic performance and stability, hierarchical Cu/ZSM-5 has a very broad application prospect in the process of catalytic ozonation of refractory pollutants.

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Acknowledgements

The authors thank the National Key Research and Development Program of China for the financial support of the study (Grant No. 2020YFD1100401).

Funding

This work was supported by the National Key Research and Development Program of China (Grant No. 2020YFD1100401).

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Jiayu Dong: Methodology, formal analysis, investigation, writing-original draft. Xianni Song: Supervision, writing-review & editing. Shuchi Zhang: Supervision, formal analysis. Mengyu Tan: Supervision, formal analysis. Haiyan Zhao: Formal analysis. Donglei Wu: Conceptualization, supervision, resources, writing-review & editing.

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Correspondence to Donglei Wu.

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Dong, J., Song, X., Zhang, S. et al. Performance of alkali and Cu-modified ZSM-5 during catalytic ozonation of polyvinyl alcohol in aqueous solution. Environ Sci Pollut Res 30, 78988–79000 (2023). https://doi.org/10.1007/s11356-023-27874-6

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  • DOI: https://doi.org/10.1007/s11356-023-27874-6

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