Degradation of herbicides by electro-Fenton process and solar Photoelectro-Fenton in pilot plant flow

• Grant number: 12/00736-4
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Start date: September 01, 2012
• End date: August 31, 2013
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Adalgisa Rodrigues de Andrade
• Grantee: Angelo Ricardo Fávaro Pipi
• Supervisor: Enrique Brillas Coso
• Host Institution: Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil
• Institution abroad: Universitat de Barcelona (UB), Spain
• Associated to the scholarship: 10/08588-9 - Oxidation of herbicides through the electrochemical and photoelectrochemical process using dimensionally stable anodes: Ti/IrO2, Ti/RuO2 and BDD., BP.DR

Abstract

Traditionally, the treatment of water contaminated with stable organic compounds is accomplished through chemical coagulation and biological treatment, followed by adsorption with activated carbon; methods are often inefficient. In this sense, in recent years have developed more efficient processes, such as electrochemical advanced oxidation processes (EAOPs), which provide excellent results to degrade water contaminated with herbicides and have many advantages over traditional methods: no impact on the environment , great versatility, energy efficiency, ease of use, automation and safety to operate in ambient conditions. These treatments are based on chemical, photochemical and electrochemical treatments and they have in common the generation of hydroxyl radicals a powerful oxidizing organic.About EAOP, we can mention the electro-Fenton process, which is the generation of hydrogen peroxide on a cathode in the presence of Fe2+ ions that form *OH radical able to oxidize the contaminant. If we add this method to UVA light, the efficiency of degradation increases giving rise to the known photoelectric-Fenton method. On the other hand, the anodic oxidation is where applies a potential enough to prevent the discharge of the water molecule to generate *OH radical on the electrode surface.In this project, we propose to study the degradation of two herbicides: Diuron and Alachlor, using the two methods mentioned above. For both studies are expected to determine the parameters of degradation and establish the possible mechanisms of oxidation in the process applied. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

PIPI, ANGELO R. F.; SIRES, IGNASI; DE ANDRADE, ADALGISA R.; BRILLAS, ENRIC. Application of electrochemical advanced oxidation processes to the mineralization of the herbicide diuron. Chemosphere, v. 109, p. 49-55, AUG 2014. (12/00736-4)

PIPI, ANGELO R. F.; DE ANDRADE, ADALGISA R.; BRILLAS, ENRIC; SIRES, IGNASI. Total removal of alachlor from water by electrochemical processes. Separation and Purification Technology, v. 132, p. 674-683, AUG 20 2014. (12/00736-4)