Graphene oxide and carboxymethylcellulose film modified by citric acid for antibiotic removal
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Publication Details
Author list: Juengchareonpoon K., Wanichpongpan P., Boonamnuayvitaya V.
Publisher: Elsevier
Publication year: 2021
Volume number: 9
Issue number: 1
ISSN: 2213-3437
eISSN: 2213-3437
Languages: English-Great Britain (EN-GB)
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Abstract
Recently, nanomaterials have been widely developed for water purification. In this work, graphene oxide and carboxymethylcellulose (GO-CMC) nanocomposites in films were modified with citric acid crosslinks. The films were prepared by a simple method involving solution mixing, evaporation, and immersion. They were characterized by XRD, FT-IR, XPS, and TGA. The swelling ratio of the film depends on the amount of graphene oxide and the concentration of citric acid. The adsorption behavior of antibiotics was studied in batch experiments as a function of contact time, graphene oxide content, initial pH value, initial concentration, temperature, and recyclability of the adsorbent. The results showed that the maximum adsorption capacity for oxytetracycline, oxolinic acid, and trimethoprim (as calculated by the Langmuir isotherm model) was 102.05, 256.68, and 370.93 mg g-1, respectively, at 30°C. The GO-CMC film exhibited stable and high reusability over five cycles. © 2020 Elsevier Ltd.
Keywords
Oxolinic acid, Trimethoprim
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