Electrochemical processes applied to the remediation of simulated and real complex aqueous systems

• Grant number: 17/20444-1
• Support type: Regular Research Grants
• Duration: February 01, 2018 - April 30, 2020
• Field of knowledge: Engineering - Sanitary Engineering - Water Supply and Wastewater Treatment
• Principal researcher: Artur de Jesus Motheo
• Grantee: Artur de Jesus Motheo
• Home Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

One of the main environmental challenges is the water scarcity, particularly associated with its quality for consumption. This quality is compromised by chemical pollution from numerous sources, such as hygiene and personal care products, dyes and agricultural pesticides. Different conventional methods are applied for the purification of contaminated wastewater however, due to the advantages in relation to these methods, the electrochemical processes have attracted much attention. Additionally, the electrochemical processes may be associated with other processes, e.g., sonolysis and photolysis, increasing the possibilities of application and the efficiency. The latter depends on a number of factors, including the composition of the solution and the concentration of its components. Thus, the present project aims at the treatment of contaminated aqueous media (real and artificial) focusing on the development of new electrocatalytic materials, the association of processes (electrochemical, photo assisted electrochemicstry, sonoelectrochemistry and electrochemical advanced oxidative processes) and scale up of processes, with the development of reactors appropriate to a specific application. Within this framework will be focused i) the development of anodes of mixed metal oxides, from solutions of ionic liquids, comparing the electrochemical and photocatalytic performance with commercial metal oxide mixture electrode, ii) the influence of reactive interferents on the electrochemical degradation of methyl paraben (target molecule), using the commercial mixture composed of phenoxyethanol and the methyl, ethyl, propyl and butyl parabens, comparing the performance of different anode materials and processes, iii) the electrochemical degradation of landfill leachate comparing different anode materials and associated processes (photolysis and sonolysis). All these degradation processes will be monitored by variations in concentration, color, total carbon, total organic carbon, chemical and biochemical oxygen demand and ammonia concentration. (AU)

Scientific publications

(4)

(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)

DIONISIO, DAWANY; RODRIGO, MANUEL A.; MOTHEO, ARTUR J.. Electrochemical degradation of a methyl paraben and propylene glycol mixture: Interference effect of competitive oxidation and pH stability. Chemosphere, v. 287, n. 3, JAN 2022. (17/10118-0, 16/19662-1, 16/04825-2, 17/20444-1)

DE MELLO, RODRIGO; RODRIGO, MANUEL A.; MOTHEO, ARTUR J.. Electro-oxidation of tetracycline in methanol media on DSA (R)-Cl-2. Chemosphere, v. 273, JUN 2021. (18/16308-8, 17/20444-1, 20/03052-5, 17/10118-0)

MALPASS, GEOFFROY ROGER POINTER; MOTHEO, ARTUR DE JESUS. Recent advances on the use of active anodes in environmental electrochemistry. CURRENT OPINION IN ELECTROCHEMISTRY, v. 27, JUN 2021. (17/20444-1)

DIONISIO, DAWANY; SANTOS, LUCAS H. E.; RODRIGO, MANUEL A.; MOTHEO, ARTUR J.. Electro-oxidation of methyl paraben on DSA (R)-Cl-2: UV irradiation, mechanistic aspects and energy consumption. Electrochimica Acta, v. 338, APR 1 2020. (16/04825-2, 17/20444-1, 16/19662-1, 17/10118-0)