Abstract
One of the major and serious pollution issues in an agriculture-based country as Vietnam is derived from herbicide, especially Glyphosate herbicide which can cause a massive quantity of adverse effects and acute toxicity to aquatic life and human health. Hence, this research focused on setting up an electro-Fenton system with a Pt gauze anode and a commercial carbon felt cathode for Glyphosate herbicide treatment with the primary mechanism based on the in situ hydrogen peroxide electro-generation and ferrous ion catalyst regeneration. This study investigated effect of initial pH and current intensity on both the amount of hydrogen peroxide production and the Glyphosate mineralization performance. The results indicated that the pH value was 3, the quantity of H2O2 production on cathode reached largest, then the Glyphosate mineralization performance was optimum, approximately 0.15 mg/L and 60% at 50 electrolysis time respectively. Moreover, when current intensity increased, the amount of H2O2 electro-generation increased, leading to better Glyphosate mineralization efficiency. Nonetheless, in order to minimize the electrode corrosion as well as save energy cost, the optimum current intensity was found being 0.5 A.
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