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Ultrasonic-assisted batch operation for the adsorption of rifampin and reactive orange 5 onto engineered zeolite–polypyrrole/TiO2 nanocomposite

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Abstract

Zeolite is a low-cost available sorbent that is frequently used for effluent treatment. To promote its performance, zeolite was supported with TiO2/polypyrrole nanoparticles (Zeo–PPY/TiO2 nanoparticles) for rifampin and reactive orange 5 (RO5) removal from aqueous solution. The prepared composite was characterized by SEM, BET, FTIR, and XRD analysis. According to these analyses, the successful coating of TiO2 and polypyrrole on zeolite was confirmed. The effects of pH, sorbent dosage, contact time, and initial concentration were studied. All these experiments were done in ultrasonic; the result indicated that the optimum contact time for rifampicin and RO5 was 20 min with 94% and 88% removal efficiencies, respectively. While RO5 reached the maximum removal efficiency at pH 2, this value for rifampicin was 5 due to their different interaction with the sorbent`s functional groups. The adsorption kinetics was well described by PSO and Elovich models for both sorbents. Also Freundlich model satisfactorily explains the sorption mechanism with R2 values 0.9974 and 0.9736 for RO5 and rifampicin, respectively. Therefore, the low-cost, environmentally friendly composite was a potential sorbent for eliminating rifampicin and RO5.

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The authors wish to thank all who assisted in conducting this work.

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Correspondence to A. Mollahosseini.

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Editorial responsibility: Samareh Mirkia.

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Motamedi, M., Mollahosseini, A. & Negarestani, M. Ultrasonic-assisted batch operation for the adsorption of rifampin and reactive orange 5 onto engineered zeolite–polypyrrole/TiO2 nanocomposite. Int. J. Environ. Sci. Technol. 19, 7547–7564 (2022). https://doi.org/10.1007/s13762-022-03951-0

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  • DOI: https://doi.org/10.1007/s13762-022-03951-0

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