Conclusions A large amount of dissolved WS pollutants are accumulated in pulping wastewater during the process of repulping and reuse of OCC waste paper. To solve this problem, we investigated the degradation of WS by the green catalytic oxidant PMo 12 , and the mechanism of the reaction was explored. WS was effectively oxidized and degraded to high value-added RS. During the hydrothermal reaction, at 145 °C, a PMo 12 dosage of 30 wt%, and a reaction time of 120 min, the TRS yield from WS reached 73.54 wt% and glycolic acid (11.05 wt%), which was equivalent to 84.59 wt% of starch recovered from OCC pulping wastewater. Molybdenum blue can be oxidized to oxidative PMo 12 by electrolysis, realizing the recycle and reuse of PMo 12 . The present study on the oxidative degradation of starch by PMo 12 has theoretical signi ¦ cance and potential application value for resource utilization of WS in OCC pulping process and cleaner management of OCC waste paper. Declarations Acknowledgements The author thanks the support from the National Natural Science Foundation of China (No.3177030417) and the Major Science and Technology Plan Project of Jiangsu Province (BE2018129). The authors also thank Zhina Lian (Nanjing Forestry University) for the HPLC tests, and Rui Liu (Nanjing IPE Institute of Green Manufacturing Industry) for the linguistic assistance. AuthorContributions Yongzhen Qiao: Conceptualization, Formal analysis, Methodology, Validation, Investigation, Writing - Original Draft, Writing - Review & Editing. Weisheng Yang: Investigation, Methodology, Formal analysis. Xiu Wang: Language. Liang Jiao: Resources. Huiyang Bian: Language, Resources. Yiqin Yang: Methodology, Resources. Shumei Wang: Resources. Hongqi Dai: Conceptualization, Supervision, Funding acquisition.
Availability of data and materials Availability of data and materials has been provided.
Ethics approval and consent to participate Á Not applicable.
Consent for publication Á Not applicable.
Competing interests The authors declare that they have no competing interests.
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