Estudo de adsorção de Cd+2 utilizando carboximetilquitosana: determinação dos parâmetros cinéticos e de equilíbrio / Study of adsorption of Cd+2 using carboxymethyl chitosan: determination of kinetic and equilibrium parameters

João Lucas Isidio de Oliveira Almeida, Carlos Emanuel de Carvalho Magalhães, Flávia Oliveira Monteiro da Silva Abreu

Abstract


A quitosana (QT) é um polissacarídeo catiônico que vem sendo muito estudado para aplicação como bioadsorvente. Com o intuito de aumentar a eficiência de adsorção, modificações estruturais têm sido realizadas. Neste trabalho foram sintetizadas amostras de carboximetilquitosana (CMQ), variando a razão de ácido monocloroacético:QT (AMC:QT) nas proporções 3:1, 6:1 e 9:1, com o intuito de avaliar a eficiência na adsorção de íons Cd+2 em diferentes pHs. Os resultados demonstraram que as amostras apresentam um baixo tempo de equilíbrio, atingido nos primeiros 20 minutos, com porcentagens de adsorção acima de 60% nos valores de pH estudados, atingindo 99% para a CMQ9A em pH 5, mostrado maior eficiência do que a quitosana. Os parâmetros cinéticos demonstraram que a amostra CMQ9A obedece ao modelo cinético de pseudo segunda ordem, sugerindo um processo cuja etapa limitante de velocidade e regida por quimiossorção. O estudo de isoterma demonstrou que a amostra de CMQ9A obedece a isoterma de Freundlich, que descreve o mecanismo de equilíbrio de adsorção, e que possui uma capacidade máxima de adsorção de 769,2 mg.g-1 . Sendo assim a carboximetilação aumenta a eficiência de adsorção em relação a QT, o que torna as CMQs potenciais materiais para utilização como bioadsorventes.


Keywords


Adsorção; Carboximetilação; Quitosana; Cádmio.

References


ABREU, F. O. M. S.; BIANCHINNI, C.; KIST, T. B. L.; FORTE, M. M. C. Preparation of Core-Shell alginate-carboxymethylchitosan hydrogels. Polymer International, v. 58, p. 1267-1274, 2009.

AKRAM, M.; BHATTI, H. N.; IQBAL, M.; NOREEN, S.; SADAF, S. Biocomposite efficiency for Cr(VI) adsorption: Kinetic, equilibrium and thermodynamics studies. Journal of Environmental Chemical Engineering, v. 5(1), p. 400-411, 2017.

ALIABADI, M.; IRANI, M.; ISMAEILI, J.; PIRI, H.; PARNIAN, M.J. Electrospun nanofiber membrane of PEO/Chitosan for the adsorption of nickel, cadmium, lead and copper ions from aqueous solution. Chemical Engineering Journal. v. 2020, p. 237-243, 2013.

BORSAGLI, F. G. L. M; MANSUR, A.A.P.; CHAGAS, P.; OLIVEIRA, L.C.A.; MANSUR, H. S. O-carboxymethyl functionalization of chitosan: Complexation and adsorption of Cd (II) and Cr (VI) as heavy metal pollutant ions. Reactive and Functional Polymers, v. 97, p. 37-47, 2015.

CUMPSTEY, I. Chemical modification of polysaccharides. ISRN Organic Chemistry, v. 2013, p. 1-27, 2013.

GE, H. C.; LUO, D. K. Preparation of carboxymethyl chitosan in aqueous solution under microwave irradiation. Carbohydrate Research, v. 340, p. 1351-1356, 2005.

GOPAL, R. M. R; GOMANTHI, T.; SARANYA, M.; SUDHA, P. N. Adsorption and kinetic studies on the removal of chromium and copper onto Chitosan-g-maliec anhydride-g-ethylene dimethacrylate. International Journal of Biological Macromolecules, v. 104, p. 1578-1585, 2017.

HE, J.; LU, Y.; LUO, G. Ca(II) imprinted chitosan microspheres: An effective and green adsorbent for the removal of Cu(II), Cd(II) and Pb(II) from aqueous solutions. Chemical Engineering Journal, v. 244, p. 202-208, 2014.

HEIDARI, A.; YOUNESI, H.; MEHRABAN, Z.; HEIKKINEN, H. Selective adsorption of Pb(II), Cd(II), and Ni(II) ions from aqueous solution using chitosan-MAA nanoparticles. International Journal of Bioogical Macromolecules, v. 61, p. 151-263, 2013.

LI, M.; ZHANG, Z.; LI, R.; WANG, J.J; ALI, A. Removal of Pb(II) and Cd(II) ions from aqueous solution by thiosemicarbazide modified chitosan. International Journal of Biological Macromolecules, v. 86, p. 876-884, 2016.

LIAO, B.; SUN, W. Y.; GUO, N.; DING, S. L.; SU, S. J. Equilibriums and kinetics studies for adsorption of Ni(II) ion on chitosan and its triethylenetetramine derivative. Colloids Surfaces A: Physicochemical and Engineering Aspects, v. 501, p. 32-41, 2016.

LIU, D.; LI, Z.; ZHU, Y.; LI, Z.; KUMAR, R. Recycled chitosan nanofibril as an effective Cu(II), Pb(II) and Cd(II) ionic chelating agent: Adsorption and desorption performance. Carbohydrate Polymers, v. 111, p. 469-476, 2014.

LOPES, E.C.N.; SOUSA, K.S.; AIROLDI, C. Chitosan–cyanuric chloride intermediary as a source to incorporate molecules—Thermodynamic data of copper/biopolymer interactions. Thermochimica Acta, v. 483, p. 21-27, 2009.

MONIER, M. Adsorption of Hg2+, Cu2+ and Zn2+ ions from aqueous solution using formaldehyde cross-linked modified chitosan-thioglyceraldehyde Schiff’s base. International Journal of Biological Macromolecules, v. 50, p. 773-781, 2012.

MUZZARELLI, R. A. A. Potential of chitin/chitosan-bearing materials for uranium recovery: An interdisciplinary review. Carbohydrate Polymers, v. 84, p. 54-63, 2011.

NGAH, W. S. W.; FATINATHAN, S. Adsorption characterization of Pb(II) and Cu(II) ions onto chitosan-tripolyphosphate beads: Kinetic, equilibrium and thermodynamic studies. Journal of Environmental Management, v. 91, p. 958-969, 2010.

PAULINO, A. T.; BELFIORE, L. A.; KUBOTA, L.T.; MUNIZ, E. C.; TAMBOURGI, E. B.; Effect of magnetite on the adsorption behavior of Pb(II), Cd(II), and Cu(II) in chitosan-based hydrogels. Desalination, v. 275, p. 187-196, 2011.

RAMANERY, F. P.; MANSUR, A. A. P.; BORSAGLI, F. G. L. M.; MANSUR, H. S. Green and facile synthesis of water-soluble ZnS quantum dots nanohybrids using chitosan derivative ligands. Journal of Nanoparticle Research, v. 16, p. 11-25, 2014.

REDDI, M. R. G.; GOMATHI, T.; SARANYA, M.; SUDHA, P. N. Adsorption and kinetic studies on the removal of chromium and copper onto Chitosan-g-maliec anhydride-g-ethylene dimethacrylate. International Journal of Biological Macromolecules, v. 104, p. 1578-1585, 2017.

ULLAH, I.; NADEEM, R.; IQBAL, M.; MANZOOR, Q. Biosorption of chromium onto native and immobilized sugarcane bagasse waste biomass. Ecological Engineering, v. 60, p. 99-107, 2013.

VILAÇA, K. A.; RODRIGUES, R. R.; FERREIRA, B. C. S. Síntese de Biosorventes com Caráter Zwitterion para Utilização em Soluções Ideais Contaminadas por Pb+2 e Cr2O72-. Brazilian Journal of Development, v. 6, p.32219-32226, 2020.

WASIKIEWICZ, J. M.; NAGASAWA, N.; TAMADA, M.; MITOMO, H.; YOSHII, F. Adsorption of metal ions by carboxymethylchitin and carboxymethylchitosan hydrogels. Nuclear Instruments and Methods in Physics Research B., v. 236, p. 617-623, 2005.

XI, G. C.; HYUN, J. P. Chemical characteristics of O-carboxymethyl chitosans related to the preparation conditions. Carbohydrate Polymers, v. 53, p. 355-359, 2003.

YAN, H.; DAI, J.; YANG, Z.; YANG, H.; CHENG, R. Enhanced and selective adsorption of copper(II) ions on surface carboxymethylated chitosan hydrogel beads. Chemical Engineering Journal, v. 174, n. 2-3, p. 586–594, 2011.

ZHAO, F.; REPO, E.; YIN, D.; SILLANPAA, M. E. T. Adsorption of Cd(II) and Pb(II) by a novel EGTA-modified chitosan material: Kinetics and isotherms. Journal of Colloid and Interface Scence, v. 409, p. 174-182, 2013.




DOI: https://doi.org/10.34117/bjdv6n7-856

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