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Removal of Enrofloxacin from Water through Magnetic Nanocomposites Prepared from Pineapple Waste Biomass

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Abstract—

In this study, a novel approach was adopted to determine the drug resistance developed due to the presence of antibiotics in industrial effluents. As a remedy, magnetic carbon nano-composites (MCNs) were prepared from waste biomass and characterized by a surface area analyzer, by SEM, EDX, XRD, FTIR, and TG/DTA. Langmuir, Freundlich and Temkin isotherms were used for the determination of adsorption parameters. The Langmuir adsorption isotherm was found to fit better the data of the equilibrium adsorption of enrofloxacin (ENR) on MCN (R2 = 0.99). The effect of pH on the adsorption process was evaluated and a decline in percentage of adsorption was noted at both highly acidic and alkaline pH. The maximum percentage of adsorption was observed at pH 6–8. The effect of ionic strength and humic acid was also tested for the removal of ENR by MCNs. Various kinetic models were used to analyze the kinetics data. The best fit was obtained with a pseudo 2nd order kinetic equation. The thermodynamic parameters were also determined: ΔS° was positive (80 J mol–1K –1) while ΔH° (23.57 kJ mol–1) and ΔG° were negative with numerical values of –0.27, –1.47, and –3.07 kJ mol–1 corresponding to temperatures 25, 40, and 60°C, respectively. MCNs were regenerated with 3% NaOH solution, methanol, and distilled water.

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Authors and Affiliations

  1. Department of Chemistry, University of Malakand, 18800, Chakdara, Dir Lower, KPK , Pakistan

    M. Zahoor, A. Ullah & S. Alam

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  1. M. Zahoor
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  2. A. Ullah
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  3. S. Alam
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Correspondence to M. Zahoor.

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Zahoor, M., Ullah, A. & Alam, S. Removal of Enrofloxacin from Water through Magnetic Nanocomposites Prepared from Pineapple Waste Biomass. Surf. Engin. Appl.Electrochem. 55, 536–547 (2019). https://doi.org/10.3103/S1068375519050156

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