Adsorption of ciprofloxacin on (Zn-Al) LDHs modified 3D reduced graphene oxide: Response surface methodology, adsorption equilibrium, kinetic and thermodynamic studies

doi:10.1016/j.cjche.2025.01.014

中国化学工程学报 ›› 2025, Vol. 83 ›› Issue (7): 125-136.DOI: 10.1016/j.cjche.2025.01.014

Adsorption of ciprofloxacin on (Zn-Al) LDHs modified 3D reduced graphene oxide: Response surface methodology, adsorption equilibrium, kinetic and thermodynamic studies

Chong Lu, Xingwei Han, Haojun Zou, Xue Gao, Sijia Wang

School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China

收稿日期:2024-10-17 修回日期:2024-12-23 接受日期:2025-01-20 出版日期:2025-07-28 发布日期:2025-07-28
通讯作者: Xingwei Han,E-mail:15140250529@163.com
基金资助:
The authors were grateful for financial support from Basic research project of Education Department of Liaoning Province (LJKZ0256) and Special Fund for Basic Scientific Research of Liaoning Province (LJKZSYLUGX027).

Adsorption of ciprofloxacin on (Zn-Al) LDHs modified 3D reduced graphene oxide: Response surface methodology, adsorption equilibrium, kinetic and thermodynamic studies

Chong Lu, Xingwei Han, Haojun Zou, Xue Gao, Sijia Wang

School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China

Received:2024-10-17 Revised:2024-12-23 Accepted:2025-01-20 Online:2025-07-28 Published:2025-07-28
Contact: Xingwei Han,E-mail:15140250529@163.com
Supported by:
The authors were grateful for financial support from Basic research project of Education Department of Liaoning Province (LJKZ0256) and Special Fund for Basic Scientific Research of Liaoning Province (LJKZSYLUGX027).

摘要/Abstract

摘要： The indiscriminate use and disposal of ciprofloxacin (CIP) have led to its detection in water globally, which pose a huge risk to public health and water environment. Herein, (Zn-Al) LDHs modified 3D reduced graphene oxide nanocomposite ((Zn-Al) LDHs/3D-rGO) was synthesized through a feasible onepot hydrothermal method for CIP removal. The highly distributed (Zn-Al) LDHs flakes on the surface of 3D-rGO endow the resulted (Zn-Al) LDHs/3D-rGO with an excellent adsorption performance for CIP. The adsorption results showed that the adsorption process could be well interpreted by Temkin isothermal model and the pseudo second-order kinetics model. The maximal adsorption capacity of 20.01 mg·g^-1 for CIP could be achieved under the optimal conditions optimized by response surface methodology (RSM). The inhibitory effect of co-existing ions on CIP adsorption were also discussed. The probable adsorption mechanism might be ascribed to p p interactions, hydrogen bonding, electrostatic, and surface complexation. Regeneration tests showed that the obtained 3D porous material also possessed pronounced recyclability. The obtained (Zn-Al) LDHs/3D-rGO holds a great potential for removal of CIP from actual wastewater.

关键词: (Zn-Al) LDHs, 3D reduced graphene oxide, Adsorbent, Synthesis, Ciprofloxacin, Adsorption

Abstract: The indiscriminate use and disposal of ciprofloxacin (CIP) have led to its detection in water globally, which pose a huge risk to public health and water environment. Herein, (Zn-Al) LDHs modified 3D reduced graphene oxide nanocomposite ((Zn-Al) LDHs/3D-rGO) was synthesized through a feasible onepot hydrothermal method for CIP removal. The highly distributed (Zn-Al) LDHs flakes on the surface of 3D-rGO endow the resulted (Zn-Al) LDHs/3D-rGO with an excellent adsorption performance for CIP. The adsorption results showed that the adsorption process could be well interpreted by Temkin isothermal model and the pseudo second-order kinetics model. The maximal adsorption capacity of 20.01 mg·g^-1 for CIP could be achieved under the optimal conditions optimized by response surface methodology (RSM). The inhibitory effect of co-existing ions on CIP adsorption were also discussed. The probable adsorption mechanism might be ascribed to p p interactions, hydrogen bonding, electrostatic, and surface complexation. Regeneration tests showed that the obtained 3D porous material also possessed pronounced recyclability. The obtained (Zn-Al) LDHs/3D-rGO holds a great potential for removal of CIP from actual wastewater.

Key words: (Zn-Al) LDHs, 3D reduced graphene oxide, Adsorbent, Synthesis, Ciprofloxacin, Adsorption

Chong Lu, Xingwei Han, Haojun Zou, Xue Gao, Sijia Wang. Adsorption of ciprofloxacin on (Zn-Al) LDHs modified 3D reduced graphene oxide: Response surface methodology, adsorption equilibrium, kinetic and thermodynamic studies[J]. 中国化学工程学报, 2025, 83(7): 125-136.

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Adsorption of ciprofloxacin on (Zn-Al) LDHs modified 3D reduced graphene oxide: Response surface methodology, adsorption equilibrium, kinetic and thermodynamic studies

Adsorption of ciprofloxacin on (Zn-Al) LDHs modified 3D reduced graphene oxide: Response surface methodology, adsorption equilibrium, kinetic and thermodynamic studies

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