Adsorption Behavior of Azo Dye Eriochrome Black T from Aqueous Solution by β-Cyclodextrins/Polyurethane Foam Material

Dong, Ke; Qiu, Fengxian; Guo, Xuhong; Xu, Jicheng; Yang, Dongya; He, Kaichen

doi:10.1080/03602559.2012.748805

Cited by 61 publications

(13 citation statements)

References 31 publications

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“…The sorption isotherms are helpful to find out the adsorbate distribution onto the sorbent under equilibrium conditions (25,26). The results of MB adsorption were used to determine adsorption isotherm.…”

Section: Isotherm Studymentioning

confidence: 99%

Removal of Methylene Blue from Aqueous Solution by Activated Carbon from Aloe Vera Wastes

Khaniabadi

Basiri

Jafari

et al. 2016

Jundishapur J Health Sci

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Background: Many organic and inorganic pollutants are discharged by various industries into the water bodies. One of the most important pollutants is dye materials that have adverse effects on human health. Objectives: In this study, Aloe Vera wastes-based activated carbon (AV-AC) was used as a low-cost sorbent for the removal of methylene blue (MB) as a textile dye from liquid medium. Methods: The effect of different parameters such as contact time, pH, adsorbent dosage, and initial dye concentration was investigated on the sorption of MB. The experimental data were examined by various kinetic and isotherm models. Results: The equilibrium was obtained at contact time of 40 minutes. Fitting the experimental data to different kinetics and isotherms models indicated that the experimental data were well fitted by the pseudo-second-order kinetic and Freundlich isotherm models. Conclusions: The maximum adsorption capacity was 129.87 mg/g. Due to low cost and high uptake capacity, Aloe Vera wastes can be considered as one effective sorbent for removal of MB.

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Section: Isotherm Studymentioning

confidence: 99%

Removal of Methylene Blue from Aqueous Solution by Activated Carbon from Aloe Vera Wastes

Khaniabadi

Basiri

Jafari

et al. 2016

Jundishapur J Health Sci

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“…The first model investigated was pseudo‐first‐order Eq. :

ln ((), q_{e} - q_{t}) = ln q_{e} - K_{1} t

where the concentration of the CV adsorbed at equilibrium and at time t is q e (mol g −1 ) and q t (mol g −1 ), respectively, and K 1 is the first‐order rate constant in min −1 (Dong et al, ). Figure shows a straight line when ln( q e − q t ) is plotted against t , with a negative rate constant for the adsorption of CV–SDS.…”

Section: Resultsmentioning

confidence: 99%

“…These isotherms allow the comparison of different adsorption systems persisting in different experimental conditions. Adsorption on a uniform surface with equivalent adsorption capacity is well described by the Langmuir isotherm, which suggests monolayer adsorption (Crini, 2008;Dong et al, 2013). It also suggests no additional adsorption if dye molecules cover the active sites on the adsorbent.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

“…Polyester-type polyurethane foam (PUF) derived from vegetable oil is widely used as an effective absorbent for the elimination of hazardous dyes. Moreover, it exhibits excellent mechanical properties along with small bulk density, large surface area, high adsorption efficiency, and good water resistance (Dong et al, 2013;Mosiewicki, Casado, Marcovich, & Aranguren, 2009;Robaina, dos Reis, & Cassella, 2011;Vinhal, Lima, & Cassella, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Kinetics, Thermodynamics, and Isothermic Evaluation in Sorption Study of Hazardous Dye Using Sodium Dodecylsulfate Physically Impregnated in Polyester‐Type Polyurethane Foam

Shirke

Parekh

Dholakiya

et al. 2018

J Surfact & Detergents

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Use of polyester‐type polyurethane foam (PUF) is an effective adsorbent for the removal of hazardous dye: crystal violet (CV) from an aqueous solution. In this adsorption study, the formation of hydrophobic ion pair (opposite charge attraction) between the charged species, i.e., cationic (basic) dye CV and anionic surfactant sodium dodecylsulfate (SDS) sorbed onto PUF. Chemical calculations were performed using quantum simulation to understand ion‐pair formation for CV–SDS at the semiempirical PM6 level. Adsorption studies were performed using 200 mg cylindrical PUF with an overhead stirrer in solutions containing varying compositions of the dye–surfactant mixture. The equilibrium thermodynamics and kinetics of the adsorption process were studies by measuring CV dye removal as a function of time and temperature. Results show that the formation of the dye–surfactant ion pair is necessary for effective adsorption onto PUF. Various adsorption isotherms, viz., Langmuir, Freundlich, Temkin, Dubinin–Radushkevich (DRK), Harkin‐Jura, and several kinetic models, viz., pseudo‐first order, pseudo‐second order, Elovich, and Intraparticle diffusion were used to fit the spectrophotometric result. The equilibrium adsorption data fit to the Langmuir isotherm gives the maximum adsorption of PUF as 33.39 mg g−1 from 200 mL 5.0 × 10−5 mol L−1 CV solution at 298.15 K. The kinetics study showed that the overall adsorption process follows pseudo‐second‐order kinetics. The Morris–Weber model suggests that an intraparticle diffusion process is active in controlling the adsorption rate. The Freundlich, Temkin, DRK adsorption isotherms showed that solute dye transfers from solution to the PUF adsorbent surface through physical adsorption. The Langmuir and Harkin‐Jura adsorption isotherms suggest that the adsorbent surface is homogeneous in nature. The thermodynamic data showed that the adsorption process is spontaneous and endothermic with a positive enthalpy change and a negative change in Gibb's energy.

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“…The ability of polymeric materials used in solid-phase extraction to remove organic contaminants from water and air atmosphere enjoys an ongoing interest [1][2][3][4][5][6][7][8][9][10][11][12] . In addition, the use of renewable resources to produce polymeric materials constituted an important step in order to obtain friendly environmental products.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Linear and Cross-Linked Cyclodextrin Polyurethane Elastomers

Oprea¹,

Potolinca²

2013

Polymer-Plastics Technology and Engineering

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Cyclodextrin-based polyurethane elastomers were synthesized to obtain network matrices with good mechanical properties apt for being used as films with scavenging properties. A series of polyurethane elastomers were obtained by chain extension of polyurethane prepolymer with cyclodextrin and butane diol or with the addition of glycerin or castor oil. Toluene, menthone and linalool were introduced as air or water contaminants. The thermal, mechanical and wetting properties of the crosslinked polyurethane films were evaluated. The improved scavenging properties, studied by static headspace chromatography were associated with polyurethane films synthesized with butane diol/cyclodextrin and castor oil/ cyclodextrin blends as chain extenders.

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Adsorption Behavior of Azo Dye Eriochrome Black T from Aqueous Solution by β-Cyclodextrins/Polyurethane Foam Material

Cited by 61 publications

References 31 publications

Removal of Methylene Blue from Aqueous Solution by Activated Carbon from Aloe Vera Wastes

Removal of Methylene Blue from Aqueous Solution by Activated Carbon from Aloe Vera Wastes

Kinetics, Thermodynamics, and Isothermic Evaluation in Sorption Study of Hazardous Dye Using Sodium Dodecylsulfate Physically Impregnated in Polyester‐Type Polyurethane Foam

Synthesis and Characterization of Linear and Cross-Linked Cyclodextrin Polyurethane Elastomers

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