Poly(alfa and beta-cyclodextrins) containing Brazilian clays to remove potentially toxic elements in contaminated water

• Grant number: 24/08105-0
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Start date: September 15, 2024
• End date: September 14, 2025
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Derval dos Santos Rosa
• Grantee: Rafaela Reis Ferreira
• Supervisor: Artur Jose Monteiro Valente
• Host Institution: Centro de Engenharia, Modelagem e Ciências Sociais Aplicadas (CECS). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil
• Institution abroad: Universidade de Coimbra (UC), Portugal
• Associated to the scholarship: 22/01382-3 - Cellulose hydrogels containing modified clays for the removal and recovery of metal ions present in contaminated water, BP.DR

Abstract

Water pollution has become a serious concern in recent decades due to high rates of wastewater generation containing different pollutants. Among the main pollutants in wastewater, potentially toxic elements (PTE) stand out, such as metal ions, which have led to numerous health problems. This situation attracts increasing attention from society and authorities due to the persistence of these elements in the environment, more specifically in waters. Sorption is effective in removing these ions, and cyclodextrin systems have shown the potential to supply the synthesis of low-cost adsorbents to remove contaminants in water. The objective of this study will be to develop poly(±-cyclodextrin) and poly(²-cyclodextrin) composites incorporating Brazilian nanoclays, specifically Brasgel (Br) and Chocobofe (Cb), for the removal of toxic metal ions, namely Cu2+, Mn2+ and Ni2+. Cyclodextrins will be produced using a crosslinking agent, and different concentrations of clays (0, 5%, and 10%, by mass) will be tested to remove contaminants. The chemical composition, morphology, and sorption capacity of metallic pollutants will be analyzed for both nanoclay systems and pure cyclodextrins and with inorganics. It is expected that changes in clays will promote an increase in surface area, seeking to obtain a functional composite with structural/mechanical properties and allow its use in cycles with a high capacity for capturing and recovering toxic metal ions in contaminated waters. Furthermore, we intend to elucidate the mechanism of sorption and desorption of contaminants through studies with isothermal models.

Scientific publications

(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)

FERREIRA, RAFAELA REIS; DA COSTA, TALLES BARCELOS; BARBOSA, RENNAN FELIX DA SILVA; CAMANI, PAULO HENRIQUE; MENEZES, ROMUALDO RODRIGUES; ROSA, DERVAL DOS SANTOS. Brazilian clays as natural cation exchangers for copper sorption in a batch system. ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY, v. 30, n. 8, p. 21-pg., 2024-09-26. (20/13703-3, 21/14714-1, 24/08105-0, 23/11229-0, 21/08296-2, 22/11133-0, 23/11783-8, 19/16301-6, 22/01382-3)

GONCALVES, LUCAS R.; FERREIRA, RAFAELA R.; SOUZA, ALANA G.; BARBOSA, RENNAN F. S.; DA COSTA, TALLES B.; ROSA, DERVAL S.. Development of lignin biochar and its incorporation in cellulose hydrogels for water decontamination. POLYMER BULLETIN, v. N/A, p. 25-pg., 2025-03-17. (24/08105-0, 22/01382-3, 23/11783-8, 21/14714-1, 21/08296-2, 20/13703-3, 22/11133-0)

DA COSTA, TALLES B.; CAMANI, PAULO H.; FERREIRA, RAFAELA R.; BARBOSA, RENNAN F. S.; ROSA, DERVAL DOS S.. Enhancing Corn Starch Hydrogels for Effective Sorption of Potentially Toxic Metals: The Role of Amylose and Amylopectin Content. JOURNAL OF POLYMERS AND THE ENVIRONMENT, v. 33, n. 3, p. 21-pg., 2025-01-25. (22/01382-3, 19/16301-6, 24/08105-0, 21/08296-2, 22/11133-0, 23/11783-8, 24/15696-5, 20/13703-3, 23/11229-0)