SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2023, Vol. 63 ›› Issue (11): 158-170.DOI: 10.1016/j.cjche.2023.05.008

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Preparation of sodium alginate gel microspheres catalysts and its high catalytic performance for treatment of ciprofloxacin wastewater

Gaoyan Shao, Jianjie Chen, Yuming Tu, Feng Liu, Zhiyong Zhou, Shichao Tian, Zhongqi Ren   

  1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2022-12-09 Revised:2023-04-27 Online:2024-01-08 Published:2023-11-28
  • Contact: Shichao Tian,E-mail:tianshichao@mail.buct.edu.cn;Zhongqi Ren,E-mail:renzq@mail.buct.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (22125802 and 22108012), Natural Science Foundation of Beijing Municipality (2222017), and Fundamental Research Funds for the Central Universities (BUCTRC-202109). The authors gratefully acknowledge these grants.

Preparation of sodium alginate gel microspheres catalysts and its high catalytic performance for treatment of ciprofloxacin wastewater

Gaoyan Shao, Jianjie Chen, Yuming Tu, Feng Liu, Zhiyong Zhou, Shichao Tian, Zhongqi Ren   

  1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • 通讯作者: Shichao Tian,E-mail:tianshichao@mail.buct.edu.cn;Zhongqi Ren,E-mail:renzq@mail.buct.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (22125802 and 22108012), Natural Science Foundation of Beijing Municipality (2222017), and Fundamental Research Funds for the Central Universities (BUCTRC-202109). The authors gratefully acknowledge these grants.

Abstract: The discharge of the antibiotic wastewater has increased dramatically in our country with the development of medical science and wide application of antibiotic, resulting in serious harm to human body and ecological environment. In this work, ciprofloxacin (CIP) was selected as one of typical antibiotics and heterogeneous Fenton-like catalysts were prepared for the treatment of ciprofloxacin wastewater. The sodium alginate (SA) gel microspheres catalysts were prepared by polymerization method using double metal ions of Fe3+ and Mn2+ as cross-linking agents. Preparation conditions such as metal ions concentration, mass fraction of SA, polymerization temperature and dual-metal ions as crosslinking agent were optimized. Moreover, the effects of operating conditions such as initial concentration of CIP, pH value and catalyst dosage on CIP removal were studied. The kinetic equation showed that the effect of the initial concentration of CIP on the degradation rate was in line with second-order kinetics, and the effects of catalyst dosage and pH value on the degradation rate of CIP were in line with first-order kinetics. The SA gel microspheres catalysts prepared by dual-metal ions exhibited a high CIP removal and showed a good reusability after six recycles. The SA gel microspheres catalysts with an easy recovery performance provided an economical and efficient method for the removal of antibiotics in the future.

Key words: Sodium alginate gel microspheres, Heterogeneous Fenton-like catalysts, Dual-metal ions, Hydroxyl radical, Ciprofloxacin wastewater

摘要: The discharge of the antibiotic wastewater has increased dramatically in our country with the development of medical science and wide application of antibiotic, resulting in serious harm to human body and ecological environment. In this work, ciprofloxacin (CIP) was selected as one of typical antibiotics and heterogeneous Fenton-like catalysts were prepared for the treatment of ciprofloxacin wastewater. The sodium alginate (SA) gel microspheres catalysts were prepared by polymerization method using double metal ions of Fe3+ and Mn2+ as cross-linking agents. Preparation conditions such as metal ions concentration, mass fraction of SA, polymerization temperature and dual-metal ions as crosslinking agent were optimized. Moreover, the effects of operating conditions such as initial concentration of CIP, pH value and catalyst dosage on CIP removal were studied. The kinetic equation showed that the effect of the initial concentration of CIP on the degradation rate was in line with second-order kinetics, and the effects of catalyst dosage and pH value on the degradation rate of CIP were in line with first-order kinetics. The SA gel microspheres catalysts prepared by dual-metal ions exhibited a high CIP removal and showed a good reusability after six recycles. The SA gel microspheres catalysts with an easy recovery performance provided an economical and efficient method for the removal of antibiotics in the future.

关键词: Sodium alginate gel microspheres, Heterogeneous Fenton-like catalysts, Dual-metal ions, Hydroxyl radical, Ciprofloxacin wastewater