Synthesis of stabilized iron nanoparticles from acid mine drainage and Rooibos tea for application as a Fenton-like catalyst
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Date
2022
Journal Title
Journal ISSN
Volume Title
Publisher
American Chemical Society
Abstract
Intensive mining activities generate toxic acid mine drainage (AMD) effluents containing a high concentration of
metals, including iron. The chemical synthesis of iron nanoparticles from this waste could lead to further environmental concerns.
Therefore, the green synthesis of nanoparticles using plants has gained significant interest because of several benefits, including being
eco-friendly. The current study reports a novel approach involving the synthesis of stabilized iron nanoparticles from AMD using
rooibos tea extract. An aqueous solution of rooibos tea was prepared and titrated with AMD to reduce Fe2+/Fe3+. The samples
synthesized under optimum conditions were characterized by TEM, XRD, FTIR, UV−Vis, and EDS. The results revealed that the
nanoparticles had an average particle size of 36 nm with a spherical shape. These particles showed promising application as a Fentonlike catalyst for the degradation of textile dye (orange II sodium salt) with a removal efficiency of 94% within 30 min. Thus, the
stabilized iron nanoparticles synthesized here performed in higher ranges than the currently reported Fenton-like catalysts regarding
dye removal efficiency and reaction time.
Description
Keywords
Iron nanoparticles, Acid, Rooibos tea, Fenton, Mining
Citation
Kimpiab, E. et al. (2022). Synthesis of stabilized iron nanoparticles from acid mine drainage and Rooibos tea for application as a Fenton-like catalyst. ACS Omega, 7(28), 24423-24431. 10.1021/acsomega.2c01846