SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2024, Vol. 68 ›› Issue (4): 27-34.DOI: 10.1016/j.cjche.2023.12.009

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Selective adsorption of tetracycline by β-CD-immobilized sodium alginate aerogel coupled with ultrafiltration for reclaimed water

Xi Quan, Jun Zhang, Linlin Yin, Wei Zuo, Yu Tian   

  1. State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, China
  • 收稿日期:2023-10-10 修回日期:2023-12-01 出版日期:2024-04-28 发布日期:2024-06-28
  • 通讯作者: Jun Zhang,E-mail address:hitsunyboy@126.com
  • 基金资助:
    This study was supported by the National Key Research and Development Program of China (2022YFC3801101), National Natural Science Foundation of China (52170028), the State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (2023DX11) and National Engineering Research Center for Safe Sludge Disposal and Resource Recovery (2021A003).

Selective adsorption of tetracycline by β-CD-immobilized sodium alginate aerogel coupled with ultrafiltration for reclaimed water

Xi Quan, Jun Zhang, Linlin Yin, Wei Zuo, Yu Tian   

  1. State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, China
  • Received:2023-10-10 Revised:2023-12-01 Online:2024-04-28 Published:2024-06-28
  • Contact: Jun Zhang,E-mail address:hitsunyboy@126.com
  • Supported by:
    This study was supported by the National Key Research and Development Program of China (2022YFC3801101), National Natural Science Foundation of China (52170028), the State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (2023DX11) and National Engineering Research Center for Safe Sludge Disposal and Resource Recovery (2021A003).

摘要: In this work, a novel composite material based on β-cyclodextrin-immobilized sodium alginate aerogel (β-CD/NaAlg) was developed utilizing cross-linker of epichlorohydrin and applied as an adsorbent to remove tetracycline antibiotics from reclaimed wastewater. A series of characterizations were utilized to confirm the successful synthesis of the adsorbent and this β-CD/NaAlg presented a three-dimensional network at the nanoscale or microscale. Under optimal conditions (pH = 4, t = 8 h, β-CD: NaAlg = 9, adsorbent dosage = 1.5 g·L-1), the maximum removal rate of β-CD/NaAlg to tetracycline was 70%. The adsorption behavior of tetracycline on β-CD/NaAlg conformed to the Freundlich isotherm model (R2= 0.9977) and the pseudo-second-order kinetic model (R2= 0.9993). Moreover, the adsorbent still removed 55.3% of tetracycline after five cycles. Specially, the adsorbent was integrated with ultrafiltration to adsorb tetracycline antibiotics from simulated reclaimed wastewater, and the removal rate of tetracycline reached 78.9% within 2 h. The existence of Cr (VI) had a negligible impact on tetracycline removal, while the presence of humic acid exhibited a promoting effect. The possible adsorption mechanisms were also elucidated through X-ray photoelectron spectroscopy and density functional theory analysis. In summary, β-CD/NaAlg represents an environmentally friendly, efficient, and sustainable adsorbent for removing tetracycline antibiotics from reclaimed water.

关键词: β-CD/NaAlg aerogel, Covalent grafting, Tetracycline antibiotics, Ultrafiltration, Selective adsorption, Reclaimed water

Abstract: In this work, a novel composite material based on β-cyclodextrin-immobilized sodium alginate aerogel (β-CD/NaAlg) was developed utilizing cross-linker of epichlorohydrin and applied as an adsorbent to remove tetracycline antibiotics from reclaimed wastewater. A series of characterizations were utilized to confirm the successful synthesis of the adsorbent and this β-CD/NaAlg presented a three-dimensional network at the nanoscale or microscale. Under optimal conditions (pH = 4, t = 8 h, β-CD: NaAlg = 9, adsorbent dosage = 1.5 g·L-1), the maximum removal rate of β-CD/NaAlg to tetracycline was 70%. The adsorption behavior of tetracycline on β-CD/NaAlg conformed to the Freundlich isotherm model (R2= 0.9977) and the pseudo-second-order kinetic model (R2= 0.9993). Moreover, the adsorbent still removed 55.3% of tetracycline after five cycles. Specially, the adsorbent was integrated with ultrafiltration to adsorb tetracycline antibiotics from simulated reclaimed wastewater, and the removal rate of tetracycline reached 78.9% within 2 h. The existence of Cr (VI) had a negligible impact on tetracycline removal, while the presence of humic acid exhibited a promoting effect. The possible adsorption mechanisms were also elucidated through X-ray photoelectron spectroscopy and density functional theory analysis. In summary, β-CD/NaAlg represents an environmentally friendly, efficient, and sustainable adsorbent for removing tetracycline antibiotics from reclaimed water.

Key words: β-CD/NaAlg aerogel, Covalent grafting, Tetracycline antibiotics, Ultrafiltration, Selective adsorption, Reclaimed water