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Degradation of Glyphosate Herbicide by an electro-Fenton Process Using Carbon Felt Cathode

Degradation of Glyphosate Herbicide by an electro-Fenton Process Using Carbon Felt Cathode

Manh Hai Tran, Hoai Chau Nguyen, Thanh Son Le, Viet Anh Dung Dang, The Ha Cao, Cao Khai Le, Trung-Dung Dang

Environ Technol. 2019 Aug 30;1-10.

PMID: 31469339

Abstract:

An electro-Fenton system, which consists of a Pt gauze anode and a commercial carbon felt cathode, is commonly employed to generate in situ hydrogen peroxide, hydroxyl radical and regenerate ferrous catalyst for glyphosate degradation (a widely used herbicide in Vietnam) in aqueous solution. The absorbance measurements used to determine the glyphosate concentration during the electrolysis proved that glyphosate was degraded by pseudo-first-order kinetic. The influence of pH, current density, catalyst concentration and initial content of the glyphosate on mineralisation efficiency were studied by monitoring the total organic carbon (TOC) and hydrogen peroxide concentration during electrolysis. The results show that the maximal removal percentage of glyphosate was 91.91% with applied current density of 10 mA cm-2, pH 3, 0.1 mM Fe2+, 0.05 M Na2SO4, and 0.1 mM glyphosate in 40 min. The degrading rate constant of glyphosate degradation was calculated to be kapp = 0.063 min-1. In this 91.91% removal, 81.65% of glyphosate was mineralised and the remainder consists of intermediates produced during the electro-Fenton process.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
IAR42134	Total Organic Carbon (TOC) PT			Price

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