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Desalination using capacitive deionization: development of new electrodes and process optimization

Grant number: 15/26593-3
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): September 01, 2016
Effective date (End): February 28, 2019
Field of knowledge:Engineering - Chemical Engineering - Chemical Process Industries
Principal Investigator:Luis Augusto Martins Ruotolo
Grantee:Rafael Linzmeyer Zornitta
Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Associated scholarship(s):16/24684-4 - Development of activated carbon from lignin as electrode for capacitive deionization of multicomponent solutions, BE.EP.DR


In the last few years the interest by the capacitive deionization technology (CDI) for water treatment (desalination and softening) has been exponentially increasing due to its efficiency and low energy consumption. The development of this technology for desalination in Brazil would be very welcome in order to provide potable water from brackish water to the semiarid region, thus promoting its social and economic development. CDI operates removing ions from solution based on the concept of storing ions in the electric double layer created when an electrode is negative and positively polarized. The development of new electrode materials is one of the most challenging issues in CDI. The search for a cheap electrode with high specific surface area, available for electrosorption, has been investigated by many research groups around the world. In this proposal the concepts of electrochemistry and materials science will be employed for the development of new electrodes materials based on carbon (and their composites) considering their sustainability. Therefore, materials abundant in Brazil, such as lignin and bagasse fly ash will be used to produce activated carbons to prepare electrodes for CDI. In the second part of this project, concepts of electrochemical engineering will be used to build a CDI cell to study different operational modes (potentiostatic, galvanostatic, and potentiodynamic) in order to optimize the process variables (current, voltage, flow rate, etc.) that maximize the desalination kinetics and the coulombic efficiency and minimize the specific energy consumption. Once optimized all the variables, the CDI cell will be used in experiments to desalinate real brackish water. (AU)

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Scientific publications (9)
(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)
LEE, JUHAN; SRIMUK, PATTARACHAI; ZORNITTA, RAFAEL L.; ASLAN, MESUT; MEHDI, B. LAYLA; PRESSER, VOLKER. High Electrochemical Seawater Desalination Performance Enabled by an Iodide Redox Electrolyte Paired with a Sodium Superionic Conductor. ACS SUSTAINABLE CHEMISTRY & ENGINEERING, v. 7, n. 11, p. 10132-10142, . (16/24684-4, 15/26593-3)
LADO, JULIO J.; ZORNITTA, RAFAEL L.; CALVI, FELIPE A.; MARTINS, MARIANA; ANDERSON, MARC A.; NOGUEIRA, FRANCISCO G. E.; RUOTOLO, LUIS A. M.. Enhanced capacitive deionization desalination provided by chemical activation of sugar cane bagasse fly ash electrodes. JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, v. 126, p. 143-153, . (15/16107-4, 15/26593-3)
ZORNITTA, RAFAEL LINZMEYER; SRIMUK, PATTARACHAI; LEE, JUHAN; KRUENER, BENJAMIN; ASLAN, MESUT; MARTINS RUOTOLO, LUIS AUGUSTO; PRESSER, VOLKER. Charge and Potential Balancing for Optimized Capacitive Deionization Using Lignin-Derived, Low-Cost Activated Carbon Electrodes. CHEMSUSCHEM, v. 11, n. 13, p. 2101-2113, . (16/24684-4, 15/26593-3)
LEE, JUHAN; SRIMUK, PATTARACHAI; CARPIER, SIDONIE; CHOI, JAEHOON; ZORNITTA, RAFAEL LINZMEYER; KIM, CHOONSOO; ASLAN, MESUT; PRESSER, VOLKER. Confined Redox Reactions of Iodide in Carbon Nanopores for Fast and Energy-Efficient Desalination of Brackish Water and Seawater. CHEMSUSCHEM, v. 11, n. 19, p. 3460-3472, . (15/26593-3, 16/24684-4)
ZORNITTA, RAFAEL L.; GARCIA-MATEOS, FRANCISCO J.; LADO, JULIO J.; RODRIGUEZ-MIRASOL, JOSE; CORDERO, TOMAS; HAMMER, PETER; RUOTOLO, LUIS A. M.. High-performance activated carbon from polyaniline for capacitive deionization. Carbon, v. 123, p. 318-333, . (15/16107-4, 15/26593-3)
ZORNITTA, RAFAEL L.; RUOTOLO, LUIS A. M.. Simultaneous analysis of electrosorption capacity and kinetics for CDI desalination using different electrode configurations. CHEMICAL ENGINEERING JOURNAL, v. 332, p. 33-41, . (15/16107-4, 15/26593-3)
ZORNITTA, RAFAEL L.; BARCELOS, KAMILLA M.; NOGUEIRA, FRANCISCO G. E.; RUOTOLO, LUIS A. M.. Understanding the mechanism of carbonization and KOH activation of polyaniline leading to enhanced electrosorption performance. Carbon, v. 156, p. 346-358, . (15/26593-3, 17/19838-5)
LADO, JULIO J.; ZORNITTA, RAFAEL L.; VAZQUEZ RODRIGUEZ, INES; BARCELOS, KAMILA MALVERDI; RUOTOLO, LUIS A. M.. Sugarcane Biowaste-Derived Biochars as Capacitive Deionization Electrodes for Brackish Water Desalination and Water-Softening Applications. ACS SUSTAINABLE CHEMISTRY & ENGINEERING, v. 7, n. 23, p. 18992-19004, . (15/26593-3, 17/19838-5, 15/16107-4)
LEE, JUHAN; SRIMUK, PATTARACHAI; ZWINGELSTEIN, ROSE; ZORNITTA, RAFAEL LINZMEYER; CHOI, JAEHOON; KIM, CHOONSOO; PRESSER, VOLKER. Sodium ion removal by hydrated vanadyl phosphate for electrochemical water desalination supplementary information (ESI) available. See DOI: 10.1039/c8ta10087j. JOURNAL OF MATERIALS CHEMISTRY A, v. 7, n. 8, p. 4175-4184, . (16/24684-4, 15/26593-3)

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Filed patent(s) as a result of this research project

CARVÕES ATIVADOS DE POLÍMEROS CONDUTORES DE ALTO DESEMPENHO PARA DIFERENTES APLICAÇÕES BR1020170104516 - Universidade Estadual de Campinas (UNICAMP) . Luís Augusto Martins Ruotolo ; Rafael Linzmeyer Zornitta - May 2017, 18