TAILIEUCHUNG - Degradation of glyphosate herbicide by an anodic oxidation process
The experimental results provided that the current intensity, treatment time, pH and initial concentration are the influent parameters on the glyphosate degradation. At the optimal condition, mgL−1 of glyphosate decreased up to mg L−1 , the removal efficiencies were 95 ± 16 %. This work demonstrates that electrochemical oxidation is a promising process for degradation and mineralization of glyphosate. | Vietnam Journal of Science and Technology 55 (4C) (2017) 231-237 DEGRADATION OF GLYPHOSATE HERBICIDE BY AN ANODIC OXIDATION PROCESS Thanh Son Le1, *, Tuan Linh Doan1, Hoai Chau Nguyen1, Nam Tran2, Patrick Drogui2 1 Insitute of Environmental Technology, VAST, 18 Hoang Quoc Viet road, Cau Giay district, Ha Noi, Viet Nam 2 Institut national de la recherche scientifique (INRS-Eau Terre et Environnement, Université du Québec, 490 rue de la Couronne, Québec, Qc, Canada * Email: Received: 1 August 2017; Accepted for publication: 16 October 2017 ABSTRACT Glyphosate is occasionally detected as water contaminants in agriculture areas where the herbicide is used extensively. The removal of glyphosate in synthetic solution using advanced oxidation process (AOP) is a possible approach for remediation of contaminated waters. Here, the ability of anodic oxidation for the degradation and mineralisation of glyphosate herbicide was investigated using Ti/PbO2 anode in batch mode. The experimental results provided that the current intensity, treatment time, pH and initial concentration are the influent parameters on the glyphosate degradation. At the optimal condition, mgL−1 of glyphosate decreased up to mg L−1, the removal efficiencies were 95 ± 16 %. This work demonstrates that electrochemical oxidation is a promising process for degradation and mineralization of glyphosate. Keywords: anodic oxidation, glyphosate, Ti/PbO2, electrochemical, herbicide removal. 1. INTRODUCTION Glyphosate is a non-selective, post-emergence organophosphorus herbicide used to control annual, perennial grasses and broad leaved weeds [1]. In particular, glyphosate is among the most widely used pesticides worldwide; according to the statistic forecast, the global market for glyphosate is expected to use million tons annually [2]. The WHO (World Health Organization) has set the recommended level of glyphosate alone or in combination with AMPA of mg L-1 for .
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