Fabrication of iron nanoparticles by reusing an iron waste and their application as efficient adsorbents to remove crystal violet dye from water

Shalu Rawat*, Jiwan Singh
Department of Environmental Science, Babasaheb Bhimrao Ambedkar University, Lucknow-226025, Uttar Pradesh,
ARTICLE INFOR: Received: 13, November, 2022, Revised: 23, November, 2022, Accepted: 24, November, 2022
CORRESPONDING AUTHOR: shalurawat200@gmail.com (S. Rawat), Tel: +91-9807461701

J. Appl. Sci. Innov. Technol. 1 (2), 37-46 (2022)


  • Two iron nanoparticles IRNPs@Pl and IRNPs@Ja were synthesised using iron rust and waste leaves of Plumeria and Jatropha.
  • The nanoparticles were amorphous in nature having different shapes and sizes.
  • Both of the nanoparticles were very efficient for the adsorption of CV.
  • Maximum adsorption was found to be 50 % by IRNPs@Pl and 89.91 % by IRNPs@Ja.


The present study reports an easy conversion of waste iron rust into nanosized iron adsorbents. These iron nanoparticles were applied for the eradication of Crystal violet (CV) by the adsorption method from aqueous solution. Both the synthesised nanoparticles (IRNPs@Pl and IRNPs@Ja) had different shapes and sizes as shown by scanning electron microscope (SEM), their elemental composition mainly comprised of “Fe”, “O”, “C” and “Cl” as per the energy dispersive X-ray spectroscopy (EDS). By using Fourier transform infrared spectroscopy (FTIR), many functional groups on the surface of nanoparticles were examined, revealing a complex surface chemistry. The XRD analysis showed that the nanoparticles were amorphous in nature. The synthesised adsorbents (Iron nanoparticles) were found efficient for dye adsorption. The highest value of adsorption percentage was found to be 85.50 % and 89.91 % using IRNPs@Pl and IRNPs@Ja, respectively. The adsorption data of CV using IRNPs@Pl fitted best with Langmuir adsorption isotherm while using IRNPs@Ja the adsorption data fitted best with Temkin isotherm. However, pseudo-second-order kinetics was followed best using both the nanoparticles.

Keywords: Iron nanoparticles; crystal violet dye; adsorption; isotherm; kinetics

Scope: Environmental Engineering

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