Adsorption behavior of reactive dye in aqueous solution on chemical cross-linked chitosan beads

Chiou, Ming-Shen; Li, H.Y

doi:10.1016/s0045-6535(02)00636-7

Cited by 787 publications

(421 citation statements)

References 26 publications

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“…Most of the reported literatures about the effect of ionic strength were evaluated at the Na ? concentration ranging from 0.1 to 1.0 mol L -1 (Chiou and Li 2003;Al-Degs et al 2008;Maurya et al 2006). But, the adsorption capacity of biochar for acid black 172 was found to have little decrease even at a very high NaNO 3 concentration (3.0 and 5.0 mol L -1 in Fig.…”

Section: Effect Of Ionic Strength On Adsorptionmentioning

confidence: 93%

Evaluation of adsorption potential of bamboo biochar for metal-complex dye: equilibrium, kinetics and artificial neural network modeling

Yang

Lin

Wei³

et al. 2013

Int. J. Environ. Sci. Technol.

154

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Metal-complex dyes are widely used in textile industry, but harmful to the environment and human health due to aromatic structure and heavy metal ions. The objective of this work was to evaluate the adsorption potential of bamboo biochar for the removal of metalcomplex dye acid black 172 from solutions. Freundlich model was more suitable for the adsorption process of bamboo biochar than Langmuir isotherm, indicating multilayer adsorption of acid black 172 on a heterogeneous bamboo biochar surface. Adsorption kinetics analysis of pseudo-second-order and Weber-Morris models revealed that intraparticle transport was not the only rate-limiting step. The bamboo biochar exhibited a good adsorption performance even at high ionic strength. Analysis based on the artificial neural network indicated that the temperature with a relative importance of 29 % appeared to be the most influential parameter in the adsorption process for dye removal, followed by time, ionic strength, pH and dye concentration.

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Section: Effect Of Ionic Strength On Adsorptionmentioning

confidence: 93%

Evaluation of adsorption potential of bamboo biochar for metal-complex dye: equilibrium, kinetics and artificial neural network modeling

Yang

Lin

Wei³

et al. 2013

Int. J. Environ. Sci. Technol.

154

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show abstract

“…They are used for removal of dye and organic coloured matter from textile effluents (i.e. a removal of 40-90% basic dyes and 40% direct dyes, with maximum adsorption capacities for basic dyes of 338 mg/g) [7,11,[13][14][15][16][17][18][19]. Pumice is a very interesting adsorbent.…”

Section: Characterisation Studiesmentioning

confidence: 99%

Dye Removal From Textile Waste Water Through The Adsorption By Pumice Used In Stone Washing

Körlü

Yapar

Perıncek

et al. 2015

Autex Research Journal

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Because the waste production is inevitable in almost all industries, the elimination of these wastes is a requirement in terms of environmental regulations and welfare of all the creatures in the future. In this study, the use of the waste pumice stones of a denim washing mill is intended to eliminate the pollutant by a waste material and obtain economic benefits by converting it to the adsorbent. The pollutants in the effluents obtained from three different localisations of waste water treatment system of the same factory were removed through the adsorption. The experimental studies were carried out in three different steps; characterisation of adsorbent before and after adsorption; adsorption isotherm studies and biological oxygen demand (BOD), chemical oxygen demand (COD) measurements. Characterisation studies showed that the waste pumice has almost the same structural properties with unused one except the existence of some organic residues coming from washing process. The results of adsorption studies conducted at the adsorbent concentrations changing from 5 to 35 g/l revealed that the decolourisation was initial dye-concentration dependent. According to the BOD and COD measurements, the supernatants obtained at the end of adsorption could be assumed as somewhat polluted and this result indicates that the organic impurities other than indigo were also removed through the adsorption.

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“…No entanto, esta interação depende do pH da solução, o qual deve ser ajustado em torno de 3 para protonação completa dos grupos amino. [21][22][23][24][25][26] Por conseguinte, o pH da solução é um dos parâmetros mais importante que afeta o processo de adsorção quando se emprega quitosana como adsorvente. 19 Os grupos amino livres possibilitam inúmeras modificações químicas da quitosana e, consequentemente, isso pode afetar suas características como adsorvente.…”

Section: Introductionunclassified

Cloreto de n-(2-hidroxil) propil-3-trimetil amônio quitosana como adsorvente de corantes reativos em solução aquosa

Fávere¹,

Riella²,

Rosa

2010

Quím. Nova

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Recebido em 30/9/09; aceito em 20/3/10; publicado na web em 9/8/10 CHITOSAN-N-2-HYDROXYPROPYL TRIMETHYL AMMONIUM CHLORIDE AS ADSORBENT FOR THE REMOVAL OF THE REACTIVE DYE FROM AQUEOUS SOLUTIONS. The quaternary chitosan was synthesized by reaction of chitosan with glycidyl trimethylammonium chloride. it was characterized by infrared spectra and conductometric titration. Adsorption of reactive blue 4 (RB4) and reactive red 120 (RR120) by quaternary chitosan was studied from aqueous medium. Two kinetic adsorption models were tested: pseudo first-order and pseudo second-order. The experimental data best fitted the pseudo second-order model. The Langmuir isotherm model provided the best fit to the equilibrium data in the concentration range investigated and the maximum adsorption capacity determined was 415 mg (RR120) and 637 mg (RB4) of reactive dye per gram of adsorbent.Keywords: reactive dye; quaternary chitosan; adsorption. INTRODUÇÃOA água é um recurso natural essencial aos processos bioquími-cos dos seres vivos e representa um fator importante nas atividades industriais de vários bens de consumo. O seu uso de forma racional, evitando o desperdício e a poluição não deveria ser motivo de preocupação somente aos ambientalistas, mas também, para as instituições governamentais e para o processo produtivo, pois 1/6 da população mundial não tem acesso à água potável. 1 Algumas formas de amenizar o problema da inevitável escassez da água seriam reduzir a poluição causada pelo processo industrial através do tratamento de seus efluentes, bem como, a implantação de projetos de reuso da água, desse modo, recuperando insumos e subprodutos. 1Há de se referir que as indústrias têxteis consomem um volume significativo de água no processo de tingimentos das fibras e tais águas são altamente coloridas devido à presença de corantes que não se fixam na fibra durante o processo de tingimento, com isso podendo afetar o processo de fotossíntese em virtude da diminuição da transparência da água, o que dificulta a entrada dos raios solares. 2,3Embora muitas moléculas orgânicas sejam degradadas, outras tantas são estáveis e, em função da sua estrutura química complexa, não são totalmente degradadas. 4 Os corantes sintéticos são, na maioria, xenobióticos, ou seja, os micro-organismos presentes em rios e lagos não contêm enzimas específicas para degradação deste tipo de composto sob condições aeróbicas; sendo que sob condições anaeró-bicas, a degradação do corante se processa muito lentamente.5 Além desse fato, estudos têm mostrado que algumas classes de corantes, principalmente azocorantes e seus subprodutos, podem ser carcinogênicos e/ou mutagênicos e, portanto, podendo causar toxidade aos organismos aquáticos. 3,6,7 O tratamento convencional dos efluentes têxteis envolve um processo físico-químico de coagulação/floculação. O sistema apresenta uma eficiência relativamente alta, o qual pode ser utilizado isoladamente ou combinado com o tratamento biológico, assim promovendo uma elevada remoção da cor de efluentes de indústrias têxteis. [...

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Adsorption behavior of reactive dye in aqueous solution on chemical cross-linked chitosan beads

Cited by 787 publications

References 26 publications

Evaluation of adsorption potential of bamboo biochar for metal-complex dye: equilibrium, kinetics and artificial neural network modeling

Evaluation of adsorption potential of bamboo biochar for metal-complex dye: equilibrium, kinetics and artificial neural network modeling

Dye Removal From Textile Waste Water Through The Adsorption By Pumice Used In Stone Washing

Cloreto de n-(2-hidroxil) propil-3-trimetil amônio quitosana como adsorvente de corantes reativos em solução aquosa

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