Fast and highly efficient removal of dyes under alkaline conditions using magnetic chitosan-Fe(III) hydrogel

Shen, Chensi; Shen, Yu; Wen, Yuezhong; Wang, Hong Yu; Liu, Weiping

doi:10.1016/j.watres.2011.07.018

Cited by 290 publications

(134 citation statements)

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“…Moreover, 3D-SPMAs can also acquire certain novel properties or functions, such as magnetic field induced structures modulation and magnetic shape memory effects. [35][36][37] In past few years, a number of 3D-SPMAs based on commercial foams/sponges, [33,34,[38][39][40] carbon material aerogels, [41][42][43] polymers aerogels, [44,45] and hydrogels [46][47][48][49][50] have been fabricated, showing great promise in water remediation and other applications. These 3D-SPMAs are constructed by either bottom-up assembly of magnetic building blocks or modifying as-existing 3D nonmagnetic networks with magnetic materials.…”

Section: Reviewmentioning

confidence: 99%

“…[46,47,49,50,116,117] Herein, magnetic particles can serve as either solely magnetic components for magnetism integration, or dual roles for both magnetism integration and crosslinkers promoting gelation. For example, Zhang et al [46] dispersed carboxy-modified Fe 3 O 4 nanoparticles in chitosan solution to form a stable ferrofluid at first, followed by the addition of the telechelic difunctional poly(ethylene glycol) (DF-PEG) to proceed Schiff reaction between chitosan and DF-PEG for crosslinking (Figure 11b).…”

Section: Preparation Of Hydrogel-based 3d-spmasmentioning

confidence: 99%

Section: Water Remediationmentioning

confidence: 99%

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3D Self‐Supporting Porous Magnetic Assemblies for Water Remediation and Beyond

Zhao

Zheng

et al. 2016

Advanced Energy Materials

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In the past few years, three‐dimensional self‐supporting porous magnetic assemblies (3D‐SPMAs) have emerged as a new research area in materials science because of their combined features of three‐dimensional self‐supporting porous assemblies (3D‐SPAs) and magnetic materials. Due to these attributes, 3D‐SPMAs gain numerous tempting properties such as magnetism‐induced actuating, magnetic shape memory effects, and alternative magnetic field (AMF) induced heat generation, showcasing huge potential in diverse applications stretching over water remediation, actuators, biomedical therapy, etc. Especially, 3D‐SPMAs displayed eminent potential in water remediation for their large processing capacity, remote controllability, and magnetic‐field‐mediated wettability. With the rising interest in 3D‐SPAs, the increasing understanding of magnetic materials, and the flourish of materials preparation technique, an upsurge has appeared in 3D‐SPMAs and thus managing them a class of emerging and promising functional materials. However, currently there are rarely review papers concerning 3D‐SPMAs. In this light, this review aims to express a comprehensive overview of this young field and fuel further innovations for preparation methods and practical applications of 3D‐SPMAs. The focus is placed on the synthetic strategies and applications especially in water remediation. The potential opportunities and challenges are also discussed.

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Section: Reviewmentioning

confidence: 99%

Section: Preparation Of Hydrogel-based 3d-spmasmentioning

confidence: 99%

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3D Self‐Supporting Porous Magnetic Assemblies for Water Remediation and Beyond

Zhao

Zheng

et al. 2016

Advanced Energy Materials

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“…Após, foi adicionado de glutaraldeído com concentração 3,0% (v/v) para formação do gel (Shen et al, 2011). O carvão ativado (10% m/m) foi adicionado ao hidrogel no passo da dissolução.…”

Section: Elaboração Do Hidrogel De Quitosana Liofilizadounclassified

Isotermas De Adsorção Do Corante Azul Brilhante Por Hidrogéis Liofilizados a Base De Quitosana

Crispim¹,

Rios²,

Silva³

et al. 2017

Blucher Chemical Engineering Proceedings

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RESUMO -O processo de adsorção vem ganhando destaque como alternativa para a remoção de corantes de efluentes. A quitosana, um biopolimero proveniente de fontes renováveis, biodegradáveis e biocompatíveis, vem ganhando notoriedade por sua eficiência na remoção dos corantes alimentícios em efluentes industriais. Os hidrogéis são estruturas de redes poliméricas formadas através de ligações cruzadas, sendo capazes de absorver água e permanecer insolúvel. Desta forma, este trabalho tem como objetivo obter e caracterizar diferentes hidrogéis à base de quitosana, e verificar o comportamento de equilíbrio nas diferentes condições da adsorção do corante alimentício azul brilhante. A caracterização do hidrogel foi feita através da análise do grau de intumescimento, força do gel e MEV. Os experimentos foram realizados com hidrogel liofilizado com e sem a adição de carvão ativado. As isotermas de adsorção foram realizadas variando a temperatura (25, 35 e 45ºC) e a concentração de corante (50, 100, 200, 300, 400 mg L -1 ). Os dados experimentais foram ajustados ao modelo de Lamgmuir (R 2 >0,98 e EMR<5%). As máximas capacidades máximas de adsorção foram à temperatura de 25ºC com os valores de 1306 e 1428 mg g -1 para os hidrogéis sem e com carvão, respectivamente. INTRODUÇÃOOs corantes artificiais são muito utilizados pelas indústrias alimentícias para conferir, intensificar cor a determinados produtos, visando sua maior aceitabilidade pelo consumidor. Esses aditivos alimentares quando lançados no meio hídrico podem apresentar caráter potencialmente tóxico e cancerígeno, sendo capaz de interferir nos processos fotossintéticos no meio ambiente devido à ações adversas que essas substâncias podem causar (Koprivanac e Kusic et al., 2008;Mittal et al., 2007).A adsorção é um métodos mais utilizados para a remoção de corantes alimentícios, devido a seu baixo custo inicial, facilidade de operação e eficiência em relação aos métodos convencionais (oxidação, coagulação/floculação, coagulação eletroquímica, tratamento biológico, entre outros), que são de alto custo ou tecnicamente complicados (Demirbas et al.,2009). Um adsorvente promissor para a remoção de corantes em soluções aquosas é a quitosana (Crini e Badot et al., 2008). Este biopolímero apresenta versatilidade, devido as

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“…Hydrogels have already been established in biotechnology and biomedicine [9][10][11][12], where they mostly serve as sca olds for tissue engineering [13]; drug, gene and protein delivery systems [14]; superabsorbents; and biosensors and bioactuators [3]. Due to their reversible swelling/ shrinking ability, stimuli-responsive hydrogels have become essential in ecology, where they are used as adsorbents in wastewater treatment for the e ective removal of dyes and heavy metals [15][16][17][18][19][20][21][22][23][24], and for the ltration of wastewater from pollution caused by oil [24][25][26]. Stimuli-responsive hydrogels also present great potential and opportunities in the eld of textiles, where they are applied to di erent textile substrates to create new smart functionalities, including thermoregulation and moisture management for comfort improvement, and the controlled release of active substances for wound dressing or skin care.…”

Section: Introductionmentioning

confidence: 99%

Stimuli-responsive Hydrogels for Textile Functionalisation: A Review

Štular¹,

Simončić²,

Tomšič³

2017

TEK

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This article reviews hydrogels used for the functionalisation of textile materials. Hydrogels are reviewed according to their reason for incorporation, aspects of crosslinking, stimuli-responsive characteristics and particle size. A more in-depth focus on the eff ect of hydrogel particle size is provided, where macrogels, microgels and nanogels for textile functionalisation are considered. The advantages and disadvantages of each size group are presented. Furthermore, the correlation between synthesis conditions and the sizes of hydrogel particles is discussed, in addition to the applications of macro-, micro-and nanogels to textile materials and their intended uses. Keywords: smart textiles, stimuli-responsive hydrogels, microgels, nanogels, preparation methods Izvleček

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Fast and highly efficient removal of dyes under alkaline conditions using magnetic chitosan-Fe(III) hydrogel

Cited by 290 publications

References 29 publications

3D Self‐Supporting Porous Magnetic Assemblies for Water Remediation and Beyond

3D Self‐Supporting Porous Magnetic Assemblies for Water Remediation and Beyond

Isotermas De Adsorção Do Corante Azul Brilhante Por Hidrogéis Liofilizados a Base De Quitosana

Stimuli-responsive Hydrogels for Textile Functionalisation: A Review

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