| Grant number: | 23/14598-7 |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |
| Start date: | December 01, 2023 |
| End date: | 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 |
| Associated scholarship(s): | 24/23595-4 - Development of modified cellulose aerogels with Schiff bases containing clays for sorption of metal ions present in contaminated water, BE.EP.DD |
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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