Ober die Adsorption von Farbstoffen

Freundlich, H.; Neumann, W.

doi:10.1515/zpch-1909-6727

Cited by 23 publications

(18 citation statements)

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“…Then most commonly employed biosorption isotherm models were applied in this present investigation viz. the Langmuir [24], Freundlich [25], Temkin [26], Harkins and Jura [27] and Doubinin-Radushkevich adsorption isotherm model [28].…”

Section: Biosorption Equilibriummentioning

confidence: 99%

“…So it shows that chemisorption mechanism is involved in biosorption of Direct Yellow 50 dye onto surface of sugarcane bagasse. The Freundlich isotherm model is valid for multilayer biosorption and is derived by assuming a heterogeneous surface with interaction between adsorbed molecules with a nonuniform distribution of heat of sorption over the surface [25]. Mathematically it can be expressed as…”

Section: Equilibrium Studiesmentioning

confidence: 99%

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Application of a novel lignocellulosic biomaterial for the removal of Direct Yellow 50 dye from aqueous solution: Batch and column study

Sadaf

Bhatti

Nausheen

et al. 2015

Journal of the Taiwan Institute of Chemical Engineers

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Section: Biosorption Equilibriummentioning

confidence: 99%

Section: Equilibrium Studiesmentioning

confidence: 99%

Application of a novel lignocellulosic biomaterial for the removal of Direct Yellow 50 dye from aqueous solution: Batch and column study

Sadaf

Bhatti

Nausheen

et al. 2015

Journal of the Taiwan Institute of Chemical Engineers

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“…Then most commonly employed biosorption isotherm models were applied in this present investigation viz. the Langmuir [21], Freundlich [22], Temkin [23] and Doubinin-Radushkevich (D-R) [24].…”

Section: Biosorption Equilibrium Studiesmentioning

confidence: 99%

Removal of Indosol Turquoise FBL dye from aqueous solution by bagasse, a low cost agricultural waste: batch and column study

Sadaf

Bhatti

Ali

et al. 2014

Desalination and Water Treatment

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A B S T R A C TThis study involves the remediation of dye containing synthetic wastewater using bagasse, a low cost agricultural waste by batch and column methods. The simulated wastewater was prepared using Indosol Turquoise FBL, commonly used dye in the textile industry. Sugarcane bagasse was used in native, HCl-treated and Na-alginate-immobilized forms. The effect of different process parameters such as medium pH, biosorbent dose, contact time, initial dye concentration and temperature on the biosorption capacity of bagasse was investigated in batch study. Maximum dye removal (65.09 mg/g) was obtained with HCl-treated bagasse. Pseudo-second-order kinetic model was better fitted to the experimental data. The equilibrium data were best described by Langmuir adsorption isotherm model. The thermodynamic study indicated the thermodynamic nature of biosorption process. Effect of surfactants, heavy metal ions and salt concentration was also explored. Breakthrough capacities were also investigated in column mode study. Effect of bed height, flow rate and initial dye concentration were investigated in column study. Maximum dye removal in continuous mode study was 28.8 mg/g. The experimental data was subjected to Thomas Model and bed depth service time models. Surface analysis of sugarcane bagasse was carried out using Fourier transform infrared (FTIR) spectrometer and scanning electron microscopy (SEM). FTIR analysis of unloaded and Indosol Turquoise FBL loaded bagasse showed the involvement of hydroxyl and carboxylic groups in the biosorption process. The results indicated that bagasse could be used to treat dye containing effluents.

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“…To simulate the adsorption isotherm, two commonly used models, the Freundlich (1906) and Langmuir (1918), were selected to explicate dye-pine cone interaction.…”

Section: Adsorption Isothermmentioning

confidence: 99%

Equilibrium, Kinetics and Mechanism of Removal of Methylene Blue from Aqueous Solution by Adsorption onto Pine Cone Biomass of Pinus radiata

Sen

Afroze

Ang

2010

Water Air Soil Pollut

406

190

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The kinetics and mechanism of methylene blue adsorption onto raw pine cone biomass (Pinus radiata) was investigated under various physicochemical parameters. The extent of the methylene blue dye adsorption increased with increases in initial dye concentration, contact time and solution pH but decreases with the amount of adsorbent, salt concentration and temperature of the system. Overall the kinetic studies showed that the methylene blue adsorption process followed pseudo-second-order kinetics among various kinetic models tested. The different kinetic parameters including rate constant, half-adsorption time and diffusion coefficient are determined at different physicochemical conditions. Equilibrium data were best represented by Langmuir isotherm among Langmuir and Freundlich adsorption isotherm. The maximum monolayer adsorption capacity of pine cone biomass was 109.89 mg/g at 30°C. The value of separation factor, R L , from Langmuir equation and Freundlich constant, n, both give an indication of favourable adsorption. Thermodynamic parameters such as standard Gibbs free energy (ΔG 0 ), standard enthalpy (ΔH 0 ), standard entropy (ΔS 0 ) and the activation energy (A) were calculated. A single-stage batch absorber design for the methylene blue adsorption onto pine cone biomass has been presented based on the Langmuir isotherm model equation. Nomenclature AActivation energy of adsorption (kJ/mol) C f Final metal ion concentration, ppm (mg/l) C 0 Initial metal ion concentration, ppm (mg/l) C t Metal ion concentration at time t, ppm (mg/l) D Diffusion coefficient (cm 2 /s) ΔG 0 Gibbs free energy change (kJ/mole) ΔH 0 Enthalpy change (kJ/mole) ΔS 0 Entropy change (J/k mole) k 1 Pseudo-first-order rate constant (min −1 ) k 2 Pseudo-second-order rate constant (mg/g min) K f Freundlich adsorption constant (mg/g) K idIntra-particle rate constant [(mg/g) min 0.5 ] MMass of adsorbent per unit volume (g l −1 ) m Amount of adsorbent added (g) n Freundlich constant q Amount of adsorbate per gram of adsorbent (mg/g) q e Amount of adsorbate per gram of adsorbent at equilibrium, (mg/g) q tAmount of adsorbate per gram of adsorbent at any time, t q m Equilibrium adsorption capacity using model q max Maximum adsorption capacity (mg/g) R 2Linear correlation coefficient Water Air Soil Pollut (2011) 218:499-515

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Ober die Adsorption von Farbstoffen

Cited by 23 publications

References 0 publications

Application of a novel lignocellulosic biomaterial for the removal of Direct Yellow 50 dye from aqueous solution: Batch and column study

Application of a novel lignocellulosic biomaterial for the removal of Direct Yellow 50 dye from aqueous solution: Batch and column study

Removal of Indosol Turquoise FBL dye from aqueous solution by bagasse, a low cost agricultural waste: batch and column study

Equilibrium, Kinetics and Mechanism of Removal of Methylene Blue from Aqueous Solution by Adsorption onto Pine Cone Biomass of Pinus radiata

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