Simultaneous removal of cationic and anionic dyes by the mixed sorbent of magnetic and non-magnetic modified sugarcane bagasse

Yu, Junxia; Zhu, Jinlin; Feng, Luo; Chi, Ruan

doi:10.1016/j.jcis.2015.04.009

Cited by 51 publications

(9 citation statements)

References 27 publications

(31 reference statements)

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“…e area under the breakthrough curves gives the amount of Cu 2+ or Co 2+ adsorbed in the bed [32]. en, the value of max of the bed can be obtained from Equation (16), until the saturation time is reached, as follows:…”

Section: Analysis Of the Breakthrough Curvementioning

confidence: 99%

“…Agroindustrial residues mainly consist of lignocellulose biomass (LB), which can be applied in the adsorption of toxic metal species as an alternative to conventional adsorbents as activated carbons and styrene-divinylbenzene ion-exchange resins, since agroindustrial residues are cheap and e cient metal ion accumulators [14]. However, LB can be chemically modi ed to increase their attraction towards speci c pollutants or to be applied to speci c processes, enhancing their physicochemical properties, such as adsorption capacity, chemical resistance to acidic and basic media, and selectivity [15,16].…”

Section: Introductionmentioning

confidence: 99%

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Oxidized Renewable Materials for the Removal of Cobalt(II) and Copper(II) from Aqueous Solution Using in Batch and Fixed-Bed Column Adsorption

Rodrigues

Martins

Furtado

et al. 2020

Advances in Polymer Technology

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Batch and continuous adsorption of Co2+ and Cu2+ from aqueous solutions by oxidized sugarcane bagasse (SBox) and oxidized cellulose (Cox) were investigated. The oxidation reaction of sugarcane bagasse and cellulose was made with a mixture of H3PO4‒NaNO2 to obtain SBox and Cox, with the introduction of high number of carboxylic acid functions, 4.5 and 4.8 mmol/g, respectively. The adsorption kinetics of Co2+ and Cu2+ on SBox and Cox were modeled using two models (pseudo-first-order and pseudo-second-order) and the rate-limiting step controlling the adsorption was evaluated by Boyd and intraparticle diffusion models. The Sips and Langmuir models better fitted the isotherms with values of maximum adsorption capacity Qmax of 0.68 and 0.37 mmol/g for Co2+ and 1.20 and 0.57 mmol/g for Cu2+ adsorption on Cox and SBox, respectively. The reuse of both spent adsorbents was evaluated. Adsorption of Cu2+ and Co2+ on SBox in continuous was evaluated using a 22 factorial design with spatial time and initial metal concentration as independent variables and Qmax and effective use of the bed as responses. The breakthrough curves were very well described by the Bohart–Adams original model and the Qmax values for Co2+ and Cu2+ were 0.22 and 0.55 mmol/g. SBox confirmed to be a promising biomaterial for application on a large scale.

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Section: Analysis Of the Breakthrough Curvementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Oxidized Renewable Materials for the Removal of Cobalt(II) and Copper(II) from Aqueous Solution Using in Batch and Fixed-Bed Column Adsorption

Rodrigues

Martins

Furtado

et al. 2020

Advances in Polymer Technology

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“…In a related study, the simultaneous removal of two industrial dyes by adsorption and photocatalysis on a fly ash TiO 2 composite was studied by Duta and Visa, 20 and they found that the efficiency of adsorption strongly depended on the microporous structure of the adsorbent and that the kinetics depended on the flexibility of the dyes. A mixed biosorbent containing carboxyl and amine groups was prepared by Yu et al 21 to treat an aqueous solution containing cationic and anionic dyes, namely Basic Red 9 and Direct Red 28, whereas Yang et al 23 reported MnFe 2 O 4 as an adsorbent for the removal of Basic Blue 9 and Direct Red 28 in single and binary systems. Considering single solutions, the adsorption rate for Basic Blue 9 was generally higher than that for Direct Red 28, and the adsorption equilibrium time for Basic Blue 9 was shorter than that for Direct Red 28.…”

Section: Introductionmentioning

confidence: 99%

“…The competitive effects between these coexisting simultaneous contaminants on removal must therefore be considered to study how these molecules can be removed from wastewater. Although several studies have reported adsorption processes for single-component systems, limited studies have considered the adsorption of organic molecules in multiple systems. − For example, the adsorption of three acid dyes, namely Acid Blue 80, Acid Red 114, and Acid Yellow 117, on an activated carbon showed that the molecular size and chemical groups can contribute to the relative differences found for the adsorption capacities of these three dyes . Similarly, the activated carbon produced from the phosphoric acid treatment of waste bamboo scaffolding and activated at several temperatures was evaluated as an adsorbent for two acid dyes by Chan et al, who reported an effect of the porosity of the activated carbons and the molecular size of the dyes on the adsorption capacity.…”

Section: Introductionmentioning

confidence: 99%

Application of Industrial Wastes from Chemically Treated Aluminum Saline Slags as Adsorbents

et al. 2018

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In this study, industrial wastes, which remain after aluminum extraction from saline slags, were used as adsorbents. The aluminum saline slags were treated under reflux with 2 mol/dm 3 aqueous solutions of NaOH, H 2 SO 4 , and HCl for 2 h. After separation by filtration, aqueous solutions containing the extracted aluminum and residual wastes were obtained. The wastes were characterized by nitrogen adsorption at −196 °C, X-ray diffraction, scanning electron microscopy, and ammonia pulse chemisorption. The chemical treatment reduced the specific surface area, from 84 to 23 m 2 /g, and the pore volume, from 0.136 to 0.052 cm 3 /g, of the saline slag and increased the ammonia-adsorption capacity from 2.84 to 5.22 cm 3 /g, in the case of acid-treated solids. The materials were applied for the removal of Acid Orange 7 and Acid Blue 80 from aqueous solutions, considering both single and binary systems. The results showed interesting differences in the adsorption capacity between the samples. The saline slag treated with HCl rapidly adsorbed all of the dyes present in solution, whereas the other materials retained between 50 and 70% of the molecules present in solution. The amount of Acid Orange 7 removed by the nontreated material and by the material treated with NaOH increased in the presence of Acid Blue 80, which can be considered as a synergistic behavior. The CO 2 adsorption of the solids at several temperatures up to 200 °C was also evaluated under dry conditions. The aluminum saline slag presented an adsorption capacity higher than the rest of treated samples, a behavior that can be explained by the specific sites of adsorption and the textural properties of the solids. The isosteric heats of CO 2 adsorption, determined from the Clausius–Clapeyron equation, varied between 1.7 and 26.8 kJ/mol. The wastes should be used as adsorbents for the selective removal of organic contaminants in wastewater treatment.

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“…In general, the most important characteristics of the adsorption based techniques are their lower cost, better availability, high efficiency, and the possibility to treat dyes in higher concentration forms in comparison to the other methods [4]. Various materials have been used as adsorbents for the dye removal, i.e., bagasse [5] and TiO2 [6]. As described in the literature, the activated carbon is the most widely used among all conventional adsorbents.…”

mentioning

confidence: 99%

Removal of Disperse Blue 56 and Disperse Red 135 dyes from aqueous dispersions by modified montmorillonite nanoclay

Ahmadishoar

Bahrami

Movassagh

et al. 2017

CI&CEQ

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In this study modified montmorillonite was used as an adsorbent for the removal of two selected disperse dyes i.e., Disperse Blue 56 (DB) and Disperse Red 135 (DR) from dye dispersions. The adsorption equilibrium data of dyes adsorption were investigated by using Nernst, Freundlich and Langmuir isotherm models. The adsorption kinetics was analyzed by using different models including pseudo-first-order, pseudo-second-order, Elovich and Intraparticle diffusion model. The Freundlich isotherm was found to be the most appropriate model for describing the sorption of the dyes on modified nanoclay. The best fit to the experimental results was obtained by using the pseudo-second-order kinetic equation, which satisfactorily described the process of dye adsorption. Although different kinetic models may control the rate of the adsorption process, the results indicated that the main rate limiting step was the intraparticle diffusion. The results showed that the proposed modified montmorillonite could be used as an effective adsorbent for the removal of disperse dyes even from highly concentrated dispersions.

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Simultaneous removal of cationic and anionic dyes by the mixed sorbent of magnetic and non-magnetic modified sugarcane bagasse

Cited by 51 publications

References 27 publications

Oxidized Renewable Materials for the Removal of Cobalt(II) and Copper(II) from Aqueous Solution Using in Batch and Fixed-Bed Column Adsorption

Oxidized Renewable Materials for the Removal of Cobalt(II) and Copper(II) from Aqueous Solution Using in Batch and Fixed-Bed Column Adsorption

Application of Industrial Wastes from Chemically Treated Aluminum Saline Slags as Adsorbents

Removal of Disperse Blue 56 and Disperse Red 135 dyes from aqueous dispersions by modified montmorillonite nanoclay

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