Research article
Green synthesis of Cr2O3 nanopigments via bioremediation of chromic acid using Convolvulus arvensis L. extract
- 1 Department of Metallurgical and Materials Engineering, Gazi University, Ankara, Türkiye
- 2 Avizhe Bespar Nazhu Company, East Azarbaijan, Iran
Abstract
The rapid growth of industrialization has greatly increased water pollution, and without necessary precautions, serious environmental and public health risks have emerged. In the initial stage, contaminated water samples containing chromic acid, a known carcinogen, were purified using the herbal extract of Convolvulus arvensis L. The obtained extract served as a bioremediation agent, enabling effective removal of chromic acid. After filtration, hexavalent chromium ions (Cr(VI)) were reduced to trivalent chromium ions (Cr(III)), and the resulting precipitate was transformed into chromium(III) oxide (Cr2O3) nanopigments through further processing. The removal efficiency was evaluated through detailed analyses using a Hach DR900 spectrophotometer, confirming that the target contaminant was removed to nearly 100%, indicating almost complete elimination. Further characterization of the synthesized Cr2O3 nanopigments was performed using Scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and ultraviolet-visible (UV-Vis) spectroscopy. These comprehensive analyses verified both the successful synthesis and the structural integrity of the nanoparticles. The results support the effective use of plant extracts for the bioremediation of toxic Cr heavy metal ions and demonstrate the practicality of this method for nanoparticle production. The Cr2O3 nanopigments with diameters ranging from approximately 10 to 30 nanometers were successfully synthesized and exhibited spherical and polygonal morphologies, with approximately 96% chromium purity.
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Keywords:
Industrial heavy metal pollution, Carcinogen, Chromic acid, Cr2O3 nanopigments, Bioremediation
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Cited By
Submitted
2026-01-08
Available online
2026-03-13
How to Cite
Salahi, S., & Mobedi, M. R. (2026). Green synthesis of Cr2O3 nanopigments via bioremediation of chromic acid using Convolvulus arvensis L. extract. Synthesis and Sintering, 6(1), 1-11. https://doi.org/10.53063/synsint.2026.61325
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Copyright (c) 2026 Shanli Salahi, Mohammad Reza Mobedi
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