Removing Efficiency and Mechanism of Ciprofloxacin from Aqueous Solution Using Rectorite

This work found that rectorite (REC) has a good adsorption effect on cationic pollutants such as ciprofloxacin (CIP), with a maximum adsorption capacity of 79.73 mg/g for CIP. The zeta potential analysis showed that the electronegativity of the REC surface would be weakened after CIP adsorption unde...

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Bibliographic Details
Published in:Water, air, and soil pollution air, and soil pollution, 2024-05, Vol.235 (5), p.271, Article 271
Main Authors: Su, Dan, Huang, Jingyi, Li, Yang, Chen, Lin, Wang, Yingru
Format: Article
Language:English
Subjects:
Adsorption
Aqueous solutions
Atmospheric Protection/Air Quality Control/Air Pollution
Cation exchange
Cation exchanging
Cations
Ciprofloxacin
Climate Change/Climate Change Impacts
Contaminants
Earth and Environmental Science
Electronegativity
Electrostatic properties
Endothermic reactions
Environment
Gravity
Hydrogen bonding
Hydrogeology
Kinetics
Soil Science & Conservation
Surface chemistry
Water Quality/Water Pollution
Zeta potential
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Summary:This work found that rectorite (REC) has a good adsorption effect on cationic pollutants such as ciprofloxacin (CIP), with a maximum adsorption capacity of 79.73 mg/g for CIP. The zeta potential analysis showed that the electronegativity of the REC surface would be weakened after CIP adsorption under acidic conditions. Through adsorption kinetics, isotherm study, XRD, FTIR, and other characterizations, the phenomenon of reduced negative charge on the surface of REC adsorbed with CIP under acidic conditions was explained. Based on the Langmuir and Temkin models, the adsorption process of CIP on REC is a spontaneous endothermic adsorption process. The adsorption kinetics can be better described using a pseudo-second-order model, indicating that the adsorption rate is mainly controlled by chemical adsorption. The characterization further proved that REC adsorbed ciprofloxacin mainly through hydrogen bonding, cation exchange, and electrostatic gravitational interaction. CIP, as an emerging contaminant discharged into the water environment, will be harmful to the ecological environment and human health. Therefore, the utilization of REC for the removal of CIP from an aqueous solution has potential prospects.
ISSN:0049-6979
1573-2932
DOI:10.1007/s11270-024-07070-z