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Open AccessArticle

A Biodegradable Magnetic Nanocomposite as a Superabsorbent for the Simultaneous Removal of Selected Fluoroquinolones from Environmental Water Matrices: Isotherm, Kinetics, Thermodynamic Studies and Cost Analysis

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Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein 2028, South Africa
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DSI/NRF SARChI Chair: Nanotechnology for Water, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, South Africa
3
DSI/Mintek Nanotechnology Innovation Centre, University of Johannesburg, P.O. Box 17011, Doornfontein 2028, South Africa
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Author to whom correspondence should be addressed.
Polymers 2020, 12(5), 1102; https://doi.org/10.3390/polym12051102
Received: 1 March 2020 / Revised: 28 March 2020 / Accepted: 31 March 2020 / Published: 12 May 2020
The application of a magnetic mesoporous carbon/β-cyclodextrin–chitosan (MMPC/Cyc-Chit) nanocomposite for the adsorptive removal of danofloxacin (DANO), enrofloxacin (ENRO) and levofloxacin (LEVO) from aqueous and environmental samples is reported in this study. The morphology and surface characteristics of the magnetic nanocomposite were investigated by X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) adsorption–desorption and Fourier transform infrared spectroscopy (FTIR). The N2 adsorption–desorption results revealed that the prepared nanocomposite was mesoporous and the BET surface area was 1435 m2 g−1. The equilibrium data for adsorption isotherms were analyzed using two and three isotherm parameters. Based on the correlation coefficients (R2), the Langmuir and Sips isotherm described the data better than others. The maximum monolayer adsorption capacities of MMPC/Cyc-Chit nanocomposite for DANO, ENRO and LEVO were 130, 195 and 165 mg g−1, respectively. Adsorption thermodynamic studies performed proved that the adsorption process was endothermic and was dominated by chemisorption. View Full-Text
Keywords: fluoroquinolones; ultrasound radiation; mesoporous carbon; desirability function; thermodynamics; wastewater; cost analysis fluoroquinolones; ultrasound radiation; mesoporous carbon; desirability function; thermodynamics; wastewater; cost analysis
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MDPI and ACS Style

Mashile, G.P.; Dimpe, K.M.; Nomngongo, P.N. A Biodegradable Magnetic Nanocomposite as a Superabsorbent for the Simultaneous Removal of Selected Fluoroquinolones from Environmental Water Matrices: Isotherm, Kinetics, Thermodynamic Studies and Cost Analysis. Polymers 2020, 12, 1102.

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