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Synergistic effect of eco-friendly pistachio shell biomass on nano-MnO2 for crystal violet removal: kinetic and equilibrium studies

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A Correction to this article was published on 26 May 2022

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Abstract

Pistachio shell powder-supported MnO2 nanostructure-based eco-friendly nanocomposite (nMPP) was prepared via one-pot redox precipitation method and was characterized by FTIR, XRD, SEM, TEM, BET, TGA/DTA, and XPS techniques. SEM and TEM analysis revealed the pseudo-spherical and nanorod morphologies of the synthesized nano-MnO2 and found agglomerated on the pistachio biomass. The nMPP contains nearly 41% Mn as MnO2 (w/w %) dispersed onto the pistachio shell biomass as confirmed from EDX, TGA, and AAS analysis. The nMPP exhibits multi-process crystal violet (CV) removal phenomenon under different pH of aqueous dye solution. Under acidic pH, nMPP caused oxidative degradation of CV by in situ formed.OH radicals; while under the neutral pH, CV undergoes monolayer adsorption onto the surface of nMPP as confirmed from Langmuir adsorption isotherm fit with maximum equilibrium adsorption value of 148.7 mg.g−1. The nMPP nanomaterial exhibits a synergistic effect between adsorption efficiencies of pistachio shell biomass and nano-MnO2 for the effective removal of toxic CV dye. The maximum saturation adsorption and rate constant (k2) value obtained from the pseudo-second-order kinetic fit model were 119.13 mg.g−1 and 5.0 × 10–4 g.mg−1 min−1, respectively.

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The data used for this manuscript have been cited with proper references. All the data used to write the results are included in manuscript and can be produced by the corresponding author on reasonable request.

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Abbreviations

PP:

Pistachio shell powder

nMPP:

Nanomanganese oxide on pistachio shell powder

FTIR:

Fourier transform infrared

XRD:

X-ray powder diffraction

FESEM:

Field emission scanning electron microscopy

EDX:

Energy-dispersive X-ray

BET:

Brunauer–Emmett–Teller

BJH:

Barrett–Joyner–Halenda

XPS:

X-ray photoelectron spectroscopy

TGA:

Thermogravimetric analysis

DTA:

Differential thermal analysis

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Acknowledgements

The authors would like to thanks the Akal University for providing research facilities and Central Instrumentation Laboratory, Central University of Punjab, for providing the physicochemical depiction facility for the characterization of materials.

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Contributions

All authors contributed equally in preparation of this manuscript. Sandeep Kumar. This is corresponding author of the manuscript. He contributed in this manuscript via designing/supervising the work, data interpretation, and writing the manuscript with major input from all co-authors. Ravinderdeep Singh Brar. Author is a Ph.D. scholar and contributed with nanocomposite synthesis, and experimental data collection for the manuscript. J Nagendra Babu. Author contributed via supervision of work, data interpretation, and providing critical feedback for writing this manuscript. Amarjeet Dahiya. Author is research scholar and assists in experimental data collection for the manuscript. Sandip Saha. Author contributed by data interpretation, figures design, and helped in research writings. Kalpana. Author contributed by acquiring and interpretation of characterization data.

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Correspondence to S. Kumar.

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The authors have no competing interests.

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Additional information

Editorial responsibility: Senthil Kumar Ponnusamy.

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Kumar, S., Brar, R.S., Saha, S. et al. Synergistic effect of eco-friendly pistachio shell biomass on nano-MnO2 for crystal violet removal: kinetic and equilibrium studies. Int. J. Environ. Sci. Technol. 20, 5123–5140 (2023). https://doi.org/10.1007/s13762-022-04212-w

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  • DOI: https://doi.org/10.1007/s13762-022-04212-w

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