title: Electrochemical degradation and mineralization of glyphosate herbicide.
abstract: The presence of herbicide is a concern for both human and ecological health. 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 is a possible approach for remediation of contaminated waters. The ability of electrochemical oxidation for the degradation and mineralization of glyphosate herbicide was investigated using Ti/PbO2anode. The current intensity, treatment time, initial concentration and pH of solution are the influent parameters on the degradation efficiency. An experimental design methodology was applied to determine the optimal condition (in terms of cost/effectiveness) based on response surface methodology. Glyphosate concentration (C0= 16.9 mg L-1) decreased up to 0.6 mg L-1when the optimal conditions were imposed (current intensity of 4.77 A and treatment time of 173 min). The removal efficiencies of glyphosate and total organic carbon were 95 ± 16% and 90.31%, respectively. This work demonstrates that electrochemical oxidation is a promising process for degradation and mineralization of glyphosate.
authors.affiliation: a Institut national de la recherche scientifique (INRS-Eau Terre et Environnement), Université du Québec , Québec , Canada.
authors.forename: Nam
authors.initials: N
authors.lastname: Tran
authors.affiliation: a Institut national de la recherche scientifique (INRS-Eau Terre et Environnement), Université du Québec , Québec , Canada.
authors.forename: Patrick
authors.initials: P
authors.lastname: Drogui
authors.affiliation: b Institute of Environmental Technology, Vietnam Academy of Science and Technology (VAST) , Hanoi , Vietnam.
authors.forename: Tuan Linh
authors.initials: TL
authors.lastname: Doan
authors.affiliation: b Institute of Environmental Technology, Vietnam Academy of Science and Technology (VAST) , Hanoi , Vietnam.
authors.forename: Thanh Son
authors.initials: TS
authors.lastname: Le
authors.affiliation: b Institute of Environmental Technology, Vietnam Academy of Science and Technology (VAST) , Hanoi , Vietnam.
authors.forename: Hoai Chau
authors.initials: HC
authors.lastname: Nguyen
mesh_terms: D055664:Electrochemical Techniques; D005998:Glycine / Q000031:analogs & derivatives* / Q000737:chemistry; D006540:Herbicides / Q000737:chemistry*; D010084:Oxidation-Reduction; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D000097797:Glyphosate
chemical_list: D005998:Glycine; D006540:Herbicides; D014874:Water Pollutants, Chemical; D000097797:Glyphosate
keywords: Glyphosate; degradation; electrochemical; herbicide; mineralization