Modified chitosan and calcium alginate biopolymer sorbents for removal of nickel (II) through adsorption

Vijaya, Y.; Popuri, Srinivasa R.; Boddu, Veera M.; Krishnaiah, A.

doi:10.1016/j.carbpol.2007.08.010

Cited by 310 publications

(147 citation statements)

References 39 publications

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“…Among these, chitosan is an amino polysaccharide derived from very abundant chitin (component of crabs, lobster and shrimp shells, squid and octopus radulae, beaks and cuttlebones, cuticles of insects, and cell walls of some fungi). 15−17 Due to their chemical structure and physicochemical properties, 18−20 chitosan and related systems have been proposed as green adsorbents for treatment of wastewater polluted by heavy metals, 21 organic dyes, 22 and aromatic and linear hydrocarbons. 23 Some more recent works have shown that magnetic materials, consisting of Fe 0 (zerovalent iron, or ZVI) and/or iron oxide nanoparticles (typically magnetite and/ or maghemite), can be conjugated/encapsulated in a (bio)-polymeric matrix for wastewater remediation processes.…”

Section: ■ Introductionmentioning

confidence: 99%

Chitosan-Derived Iron Oxide Systems for Magnetically Guided and Efficient Water Purification Processes from Polycyclic Aromatic Hydrocarbons

Nisticò¹,

Franzoso²,

Cesano³

et al. 2016

ACS Sustainable Chem. Eng.

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Chitosan and pyrolyzed chitosan, acting as protective frameworks of magnetic nanoparticles (magnetite/ maghemite and/or metallic Fe), have been investigated to be used in magnetically guided water remediation processes from polycyclic aromatic hydrocarbons (PAHs). Chitosan-derived magnet-sensitive materials were first obtained by a one-step coprecipitation method, and then two carbon-derived magnetic chitosan materials were obtained under N 2 gas flow at 550 and 800°C, respectively. The obtained materials were investigated by means of X-ray diffraction (XRD), FTIR spectroscopy, scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), atomic force microscopy (AFM), magnetic force microscopy (MFM), and magnetization measurements. Thermal treatment conditions, along with the amounts of chitosan used in the synthesis processes, played a critical role in the crystal structure and magnetic properties of the obtained nanomaterials. The adsorption capacity of chitosan-derived magnet-sensitive materials was tested toward PAHs. The results indicate high sorption capacity for anthracene and naphthalene onto the chitosan-derived material pyrolyzed at 550°C. Furthermore, experiments performed with a mixture of eight PAHs show that PAH molecules with higher hydrophobicity and more extended aromaticity had stronger sorption capacity. Interestingly, due to the obtained results, the use of chitosan is encouraged as a platform for the creation of green adsorbents for further developments in wastewater purification treatments.

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Section: ■ Introductionmentioning

confidence: 99%

Chitosan-Derived Iron Oxide Systems for Magnetically Guided and Efficient Water Purification Processes from Polycyclic Aromatic Hydrocarbons

Nisticò¹,

Franzoso²,

Cesano³

et al. 2016

ACS Sustainable Chem. Eng.

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“…As partículas de areia foram recobertas utilizando a técnica dip-coating (Vijaya et al, 2008). O processo de recobrimento é composto por três etapas: (a) limpeza; (b) recobrimento; (c) cura.…”

Section: Recobrimento Das Partículas Pelo Método "Dip-coating"unclassified

AVALIAÇÃO DA INFLUÊNCIA DA MATRIZ SiO4 NO PROCESSO DE RECOBRIMENTO DE SUPERFÍCIE COM QUITOSANA PELO MÉTODO ‘DIP-COATING’ E O EFEITO DINÂMICO NO LEITO FIXO

Grilo¹,

Monteiro²,

Oliveira³

et al. 2015

Anais Do Congresso Brasileiro De Engenharia Química Em Iniciação Científica - Cobeq IC 2015

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RESUMO -O objetivo desse trabalho foi recobrir partículas de areia com quitosana pelo método de imersão ("dip-cating") e comparar a influência da matriz SiO 4 no resultado final do processo de recobrimento, usando como parâmetro de comparação esferas de vidro. As partículas passaram pela etapa de preparação da superfície, após foram submetidas ao processo de recobrimento e posteriormente submetidas à etapa de cura. Foram avaliadas partículas com 1mm de diâmetro, com efluente contendo corante amarelo tartrazina em concentração inicial de 85 mg L -1 , com uma vazão de alimentação de 5 mL min -1 em pH 3,0. Os resultados mostraram que a pureza da matriz SiO 4 , influenciou diretamente no processo de recobrimento da superfície por quitosana, apresentando um desempenho 40% inferior quando comparado com a matriz SiO 4 pura (vidro) na massa de quitosana retida/massa de partículas e um desempenho 30% inferior na capacidade de adsorção. Esse efeito deve-se ao fato de que as impurezas presentes na areia (metais) modificam o arranjo estrutural dos átomos, dificultando a interação da superfície da partícula com a quitosana. INTRODUÇÃOA adsorção é uma operação unitária que apresenta boa relação custo-benefício para a remoção de corantes, íons metálicos e compostos orgânicos de efluentes industriais que apresentam concentração na faixa de 1 a 1000 mg L -1 (Guibal, 2004). É uma técnica amplamente utilizada em escala laboratorial em sistemas operando em batelada, pois é de fácil aplicação e fornece informações importantes sobre a interação entre adsorvente e adsorbato. Porém, em escala industrial a operação ocorre normalmente em sistemas contínuos que operam em colunas (Gerente et al., 2007).Vários adsorventes alternativos vêm sendo estudados e entre eles a quitosana apresenta lugar de destaque como um promissor adsorvente, sendo ela hidrofílica e possuindo um grande número grupos funcionais amino (-NH 2 ) e hidroxila (-OH), que são responsáveis pela propriedade de adsorção desse biopolímero (Sankararamakrishnan et al., 2007). Entretanto, a utilização da quitosana na forma de pó como recheio em colunas de leito fixo é desaconselhável devido às características da partícula (densidade, formato e tamanho), pois há fortes limitações hidrodinâmicas ao sistema devido à perda de carga e obstrução. Porém a imobilização da quitosana em superfícies é uma alternativa para contornar esse problema (Guibal, 2004).

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“…FTIR spectra of Crab shell powder (a), chitosan powder the amide and C-O-C linkages respectively 22 . Based on the literature and the chemistry between chitosan and metal ions these functional groups were identifi ed as the main functional groups responsible for metal uptake 26 .…”

Section: Ftir Studiesmentioning

confidence: 99%

Biosorption Performance of Biodegradable Polymer Powders for the Removal of Gallium(III) ions from Aqueous Solution

Lee

Lin

Cadogan

et al. 2015

Polish Journal of Chemical Technology

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Gallium (Ga) is considered an important element in the semiconducting industry and as the lifespan of electronic products decrease annually Ga-containing effl uent has been increasing. The present study investigated the use of biodegradable polymer powders, crab shell and chitosan, in the removal of Ga(III) ions from aqueous solution. Ga(III) biosorption was modeled to Lagergren-fi rst, pseudo-second order and the Weber-Morris models. Equilibrium data was modeled to the Langmuir, Freundlich and Langmuir-Freundlich adsorption isotherms to determine the probable biosorption behavior of Ga(III) with the biosorbents. The biosorbents were investigated by Fourier Transform Infrared Spectroscopy, X-ray Diffraction and Scanning Electron Microscopy/ Energy Dispersive Spectra analysis.

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Modified chitosan and calcium alginate biopolymer sorbents for removal of nickel (II) through adsorption

Cited by 310 publications

References 39 publications

Chitosan-Derived Iron Oxide Systems for Magnetically Guided and Efficient Water Purification Processes from Polycyclic Aromatic Hydrocarbons

Chitosan-Derived Iron Oxide Systems for Magnetically Guided and Efficient Water Purification Processes from Polycyclic Aromatic Hydrocarbons

AVALIAÇÃO DA INFLUÊNCIA DA MATRIZ SiO4 NO PROCESSO DE RECOBRIMENTO DE SUPERFÍCIE COM QUITOSANA PELO MÉTODO ‘DIP-COATING’ E O EFEITO DINÂMICO NO LEITO FIXO

Biosorption Performance of Biodegradable Polymer Powders for the Removal of Gallium(III) ions from Aqueous Solution

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