Reusable and environmentally friendly cellulose nanofiber/titanium dioxide/chitosan aerogel photocatalyst for efficient degradation of tetracycline

Zhang, Yuhui; Liu, Fei; Zhong, Li; Dong, Zhaoji; Chen, Chuchu; Xu, Zhaoyang

doi:10.1016/j.apsusc.2023.158425

Cited by 15 publications

(1 citation statement)

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“…The reusability of Am/TEMPO-CNF adsorption was assessed over four consecutive adsorption-desorption cycles using a adsorbent solution of 0.01 mol L −1 NaOH. A decreased trend in the adsorption-desorption % of OTC and CAP has been observed with each cycle, which might be due to the saturation of functional groups on the Am/TEMPO-CNF's surface and minimal structural damage [50]. The adsorption potential of Am/TEMPO-CNF for OTC and CAP decreased from 90.64% and 85.87% to 79.04% and 70.36%, respectively.…”

Section: Adsorption Thermodynamicsmentioning

confidence: 90%

Self-Assembled Aminated and TEMPO Cellulose Nanofibers (Am/TEMPO-CNF) Aerogel for Adsorptive Removal of Oxytetracycline and Chloramphenicol Antibiotics from Water

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et al. 2024

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Antibiotics are used for the well-being of human beings and other animals. Detectable levels of antibiotics can be found in pharmaceutical, municipal, and animal effluents. Therefore, the treatment of antibiotic contaminated water is of great concern. In this study, we fabricated a sustainable aminated/TEMPO cellulose nanofiber (Am/TEMPO-CNF) aerogel to remove oxytetracycline (OTC) and chloramphenicol (CAP) from synthetic wastewater. The prepared aerogel was characterized using different analytical techniques such as elemental analysis, FTIR, TGA, SEM-EDS, and N2 adsorption–desorption isotherms. The characterization techniques confirmed the presence and interaction of quaternary amine -[NR3]+ and -COOH groups on Am/TEMPO-CNF with OTC and CAP, which validates the successful modification of Am/TEMPO-CNF. The adsorption process of the pollutants was examined as a function of solution pH, concentrations, reaction time, and temperatures. The maximum adsorption capacity was 153.13 and 150.15 mg/g for OTC and CAP, respectively. The pseudo-second order (PSO-2) was well fitted to both OTC and CAP, confirming the removal is via chemisorption. Hydrogen bonding and electrostatic attraction have been postulated as key factors in facilitating OTC and CAP adsorption according to spectroscopic studies. Energetically, the adsorption was spontaneous and endothermic for both pollutants. In conclusion, the efficient removal rate and excellent reusability of Am/TEMPO-CNF indicate the strong potential of the adsorbent for antibiotics’ removal.

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Section: Adsorption Thermodynamicsmentioning

confidence: 90%