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

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

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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 ultrafiltra-tion 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 sus-tainable adsorbent for removing tetracycline antibiotics from reclaimed water.

β-CD/NaAlg aerogelCovalent graftingTetracycline antibioticsUltrafiltrationSelective adsorptionReclaimed water

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

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State Key Laboratory of Urban Water Resource and Environment(SKLUWRE),School of Environment,Harbin Institute of Technology,Harbin 150090,China

National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaState Key Laboratory of Urban Water Resource and Environment,Harbin Institute of TechnologyNational Engineering Research Center for Safe Sludge Disposal and Resource Recovery

2022YFC3801101521700282023DX112021A003

2024

10.1016/j.cjche.2023.12.009

中国化学工程学报(英文版)
中国化工学会

中国化学工程学报(英文版)

CSTPCDEI
影响因子：0.818
ISSN：1004-9541
年,卷(期)：2024.68(4)
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