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DEVELOPMENT OF AEROGELS CONTAINING CELLULOSE MICROFIBERS AND CLAY FOR THE METAL IONS REMOVAL PRESENT IN CONTAMINATED WATER

Grant number: 23/14598-7
Support Opportunities:Scholarships in Brazil - Doctorate (Direct)
Effective date (Start): December 01, 2023
Effective date (End): October 31, 2026
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
Principal Investigator:Derval dos Santos Rosa
Grantee:Lana Siqueira Maia
Host Institution: Centro de Engenharia, Modelagem e Ciências Sociais Aplicadas (CECS). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil
Associated research grant:20/13703-3 - Environmentally friendly porous materials for the recovery and revaluation of metals reclaimed from contaminated water, AP.TEM

Abstract

The advance of industrialization and the exponential increase in population triggered the worsening of environmental stress related to the emission of contaminated effluents, causing severe damage to the aquatic ecosystem. Among the contaminants, metallic ions stand out, which pose risks to human health and environmental balance. Using three-dimensional porous systems, such as aerogels, appears to be a material with exciting potential for removing these contaminants. Furthermore, incorporating nanoparticles can help increase the removal capacity of these contaminants. Therefore, this project proposes investigating the production process of aerogels containing cellulose and clay microfibers (Chocobofe and Paligorskita) to remove divalent metal ions (manganese, nickel, and zinc). The performance of the citric acid and epichlorohydrin reagents as crosslinking agents will be evaluated, followed by the freeze-drying process. Clays and aerogels will be characterized in terms of chemical composition, specific surface area, mechanical and thermal properties, and ability to adsorb and desorb metallic ions. The incorporation of clays is expected to increase surface area, seeking to obtain aerogels with well-developed structural/mechanical properties of high adsorption capacity and interesting reusability in water treatment systems contaminated with the ions under study. Furthermore, we aim to understand the mechanism of sorption and desorption of contaminants through kinetic and isothermal models.

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