RT journal article
T1 Lignin-Furanic Rigid Foams: Enhanced Methylene Blue Removal Capacity, Recyclability, and Flame Retardancy
A1 Duarte, Hugo
A1 Brás, João
A1 Hassani, El Mokhtar Saoudi
A1 Aliaño González, María José
A1 Magalhães, Solange
A1 Alves, Luis
A1 Valente, Artur J. M.
A1 Eivazi, Alireza
A1 Norgren, Magnus
A1 Romano, Anabela
A1 Medronho, Bruno
A2 Química Analítica
K1 lignin
K1 polyphenols
K1 tannins
K1 water treatment
K1 biobased materials
K1 foams
K1 methylene blue
AB Worldwide, populations face issues related to water and energy consumption. Waterscarcity has intensified globally, particularly in arid and semiarid regions. Projections indicate thatby 2030, global water demand will rise by 50%, leading to critical shortages, further intensified bythe impacts of climate change. Moreover, wastewater treatment needs further development, giventhe presence of persistent organic pollutants, such as dyes and pharmaceuticals. In addition, thecontinuous increase in energy demand and rising prices directly impact households and businesses,highlighting the importance of energy savings through effective building insulation. In this regard,tannin-furanic foams are recognized as promising sustainable foams due to their fire resistance,low thermal conductivity, and high water and chemical stability. In this study, tannin and ligninrigid foams were explored not only for their traditional applications but also as versatile materialssuitable for wastewater treatment. Furthermore, a systematic approach demonstrates the completereplacement of the tannin-furan foam phenol source with two lignins that mainly differ in molecularweight and pH, as well as how these parameters affect the rigid foam structure and methyleneblue (MB) removal capacity. Alkali-lignin-based foams exhibited notable MB adsorption capacity(220 mg g−1), with kinetic and equilibrium data analysis suggesting a multilayer adsorption process.The prepared foams demonstrated the ability to be recycled for at least five adsorption-desorptioncycles and exhibited effective flame retardant properties. When exposed to a butane flame for 5 min,the foams did not release smoke or ignite, nor did they contribute to flame propagation, with the redglow dissipating only 20 s after flame exposure.
PB MDPI
SN 2073-4360
YR 2024
FD 2024-11-27
LK http://hdl.handle.net/10498/35878
UL http://hdl.handle.net/10498/35878
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 09-nov-2026