tailieunhanh - Electrochemical Generation of Hydrogen Peroxide for Fenton Process for Glyphosate Herbicide Treatment

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 at pH 3, the quantity of H2O2 production on cathode was highest (~ mg/L), and the Glyphosate mineralization performance was optimum, approximately 60% at an electrolysis time of 50 min. | VNU Journal of Science: Earth and Environmental Sciences, Vol. 33, No. 4 (2017) 1-8 Electrochemical Generation of Hydrogen Peroxide for Fenton Process for Glyphosate Herbicide Treatment Le Thanh Son*, Tran Manh Hai, Doan Tuan Linh Insitute of Environmental Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam Received 09 May 2017 Revised 19 October 2017; Accepted 28 December 2017 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 at pH 3, the quantity of H2O2 production on cathode was highest (~ mg/L), and the Glyphosate mineralization performance was optimum, approximately 60% at an electrolysis time of 50 min. Moreover, when current intensity increased, the amount of H2O2 electro-generation increased, leading to a better Glyphosate mineralization efficiency. Nonetheless, in order to minimize the electrode corrosion as well as save energy cost, the optimum current intensity was found at A. Keywords: Electro-Fenton, hydroxyl radical, Glyphosate, hydrogen peroxide, herbicide removal. 1. Introduction (inflamed stomach linings), genetic damage (in human blood cells), effects on reproduction (reduced sperm counts in rats; increased frequency of abnormal sperm in rabbits), and carcinogenicity (increased frequency of liver tumors in .