Shivaswamy, B.Manu, B.Sreenivasa, M.Y.2026-02-042022H2Open Journal, 2022, 5, 4, pp. 713-721https://doi.org/10.2166/h2oj.2022.045https://idr.nitk.ac.in/handle/123456789/22250Iron nanocatalyst for its potential application as Fenton’s catalyst for the degradation of methylene blue dye was synthesized with the fruit extract of Citrus maxima using bioleached laterite iron as a precursor. Synthesized iron particles were characterized suitably and their catalytic role in the degradation of methylene blue and rhodamine B by Fenton’s oxidation was evaluated. The synthesized nanocatalyst exhibits heterogeneous catalytic properties in the degradation of methylene blue and rhodamine B with a degradation efficiency of 93.6 and 91.3%, respectively. Observed rate constants are consistent with the increase in catalyst dosage as it speeds up the reaction. The degradation of methylene blue and rhodamine B follows a pseudo-first-order reaction with a linear fit. Reusability studies confirm the reduction in the catalytic efficiency of the synthesized iron nanoparticles after five consecutive cycles. © 2022 The Authors.Citrus maximadyeFenton’s processlateritemethylene bluerhodamine B