Cationic dialdehyde cellulose microfibers for efficient removal of eriochrome black T from aqueous solution

• Autor(a) principal: Silva Gomes, Andressa [UNESP]
• Data de Publicação: 2023
• Outros Autores: Vitória Guimarães Leal, Maria [UNESP], Roefero Tolosa, Gabrieli [UNESP], Camargo Cabrera, Flávio [UNESP], Dognani, Guilherme [UNESP], Eloízo Job, Aldo [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1016/j.biortech.2023.129096; http://hdl.handle.net/11449/248742
• topic: Adsorption; Biosorbents; Cationic Dialdehyde Cellulose; Eriochrome Black T; Microfibers

Materials based on cellulose have been widely used as a decontaminant agent of wastewater. However, it can not be found in the literature any application of the cationic dialdehyde cellulose (cDAC) in anionic dye removal. Therefore, this study aims a circular economy concept using sugarcane bagasse to obtain a functionalized cellulose by oxidation and cationization. cDAC was characterized by SEM, FT-IR, oxidation degree, and DSC. Adsorption capacity was evaluated by pH, kinetic, concentration effect, strength ionic tests, and recycling. The kinetic followed Elovich model (R2 = 0.92605 for EBT = 100 mg/L) and non-linear Langmuir model (R2 = 0.94542), which resulted in a maximum adsorption capacity of 563.30 mg/g. The cellulose adsorbent reached an efficient recyclability of 4 cycles. Thus, this work presents a potential material to become a new, clean, low-cost, recyclable, and environmentally friendly alternative for effluent decontamination-containing dyes.