Study of ametrine pesticide degradation by advanced oxidation techniques mediated by sulfate radicals

• Grant number: 22/01991-0
• Support Opportunities: Scholarships abroad - Research Internship - Scientific Initiation
• Effective date (Start): May 01, 2022
• Effective date (End): August 31, 2022
• Field of knowledge: Engineering - Sanitary Engineering - Water Supply and Wastewater Treatment
• Principal Investigator: Marcela Prado Silva Parizi
• Grantee: Gabriela de Souza Freitas
• Supervisor: Cátia Alexandra Leça Graça
• Host Institution: Faculdade de Engenharia e Ciências (FEC). Universidade Estadual Paulista (UNESP). Campus de Rosana. Rosana , SP, Brazil
• Research place: Universidade do Porto (UP), Portugal
• Associated to the scholarship: 19/13119-2 - Determination of water photochemical attenuation potential against micropollutants in Pirapozinho-SP river, BP.IC

Abstract

In view of the work that has been carried out through process No. 2019/13119-2, linked to Regular Aid No. 2019/00696-1, which aims to study the photochemical attenuation potential of the Pirapozinho River (SP) against micropollutants, the present project foresees favorable and contributing contributions to the processes and to academia. The use of pesticides has intensified more and more, with an increase of about 400% in the production of sugarcane in recent years in Pontal do Paranapanema, the research study site. Among the most used pesticides in this crop are diuron, ametryn and atrazine, all classified as herbicides that act in pest control. In the development of our scientific initiation research, it was observed that the herbicide ametrine can remain in the aquatic environment for periods of up to 9 days under the conditions studied, enough time to reach places of water capture for human consumption. In this context, and taking into account that ametrine is a persistent pollutant that is not degraded by conventional processes of water and sewage treatment, we intend at this stage of research abroad to study an alternative treatment process to remove this pollutant from the aqueous environment.In view of the experience of the LSRE-LCM research group at the University of Porto in the application of advanced oxidative processes in water treatment, such as heterogeneous catalysis using alternative (non-metallic) catalysts, the focus of our research at this University will be to investigate the degradation of ametrine using catalyzed persulfate. Considering the low number of scientific works aimed at identifying the degradation of ametrine through advanced oxidative processes (AOPs), this work is an original contribution. (AU)