Please use this identifier to cite or link to this item: https://repositorio.fei.edu.br/handle/FEI/3529
Title: Lignocellulosic derivative and chitosan bioadsorbent: Synthesis, characterization, and performance in chromium adsorption
Authors: ANDRADE NETO, JOSÉ CARLOS
PEREIRA, GILBERTO JOSÉ
Andreia de Araújo Morandim Giannetti
Issue Date: 14-Mar-2020
Abstract: Environmental pollution with heavy metals, especially with hexavalent chromium, is a serious problem worldwide. Therefore, in this study, the synthesis, characterization, and application of a heavy metal bioadsorbent, CMCCHDIC, were carried out. Carboxymethylcellulose (CMC) was synthesized from corn stover and reacted with chitosan (CH) using N,N′-diisopropylcarbodiimide (DIC) as a coupling reagent to obtain CMCCHDIC. CMC and CMCCHDIC were characterized by granulometric distribution of microparticles, scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry, and nuclear magnetic resonance. The ideal conditions for CMCCHDIC adsorption were determined, and 180 min of contact time, pH 2.5, and 293 K were observed to yield the best adsorption capacity. An increase in the adsorption capacity of CMCQDIC (qe = 115.78 ± 0.17 mg∙g−1) to 81.5% relative to that of pure CH (qe = 63.78 ± 0.48 mg∙g−1) was observed, and the reduction of solubility in acidic media comparing with CH, which favors the application of the bioadsorbent synthetized.
Keywords: Adsorption
Applications
Biopolymers and renewable polymers
Cellulose and other woodproducts
Journal: JOURNAL OF APPLIED POLYMER SCIENCE (ONLINE)
Citation: ANDRADE NETO, J. C. ; PEREIRA, G. J.; GIANNETTI, A. DE A. M. Lignocellulosic derivative and chitosan bioadsorbent: synthesis, characterization, and performance in chromium adsorption. JOURNAL OF APPLIED POLYMER SCIENCE (ONLINE), v. 137, n. 40, p. 49208, 2020.
Access Type: Acesso Restrito
DOI: 10.1002/app.49208
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