GREEN SYNTHESIZED ACIDIC NANOPARTICLES FOR EFFICIENT FENTON DEGRADATION OF RHODAMINE B DYE

Résumé

1. Green Synthesis of Iron Oxide Nanoparticles: 2. Experimental Procedure: 1-RhB degradation was performed in a 250 mL solution containing 0.2g of NPs, 2 mL of 1M H₂O₂ and 20 mg/L of RhB.2-The green-synthesized nanoparticles were added to initiate the Fenton-like reaction.3-Samples were taken each 10min ,then they were centrifuged for 10 minutes, and the supernatants were analyzed using UV-Visible spectrophotometry at 554 nm. 3.Key Steps in the Fenton-Like Reaction:1. Self-Acidification: The acidic nature of the nanoparticles naturally adjusts the pH of the solution to around 4, which is optimal for the Fenton-like reaction.2. Catalysis: Iron ions from the nanoparticles react with H₂O₂ to produce hydroxyl radicals (•OH).3. Degradation of RhB: The generated •OH radicals attack the RhB dye molecules, breaking them down into smaller, non-toxic compounds.The removal of synthetic dyes from wastewater is a significant environmental challenge due to the toxic, persistent nature of these compounds.Conventional methods for dye degradation often rely on chemical treatments that can produce secondary pollutants.This study investigates an alternative approach by using green-synthesized nanoparticles derived from acidic plant extracts to drive a Fenton-like reaction.These nanoparticles not only serve as catalysts but also naturally lower the solution pH to optimal levels, eliminating the need for additional acidification.The result is an eco-friendly, cost-effective method for rapid dye degradation, particularly focusing on Rhodamine B (RhB) as a model contaminant.Green-synthesized nanoparticles (NPs) from acidic plant extracts offer a sustainable and eco-friendly alternative for environmental remediation.This study focuses on the use of such nanoparticles in a Fenton-like reaction to degrade Rhodamine B (RhB) without the need for external acidification.The nanoparticles naturally lowered the solution's pH to around 4, creating optimal conditions for the Fenton-like reaction.The degradation experiment was conducted using 2 mL of 1M H₂O₂ and 20 g/L of Rhodamine B in a 250 mL solution.Complete degradation of RhB was achieved within 40 minutes of reaction time.

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