The adsorption of dyes onto chitin in fixed bed columns and batch adsorbers

McKay, Gordon; Blair, H. S.; Gardner, John

doi:10.1002/app.1984.070290504

Cited by 98 publications

(57 citation statements)

References 5 publications

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“…Langmuir, Freundlich, Temkin, Halsey and HarkinsJura isotherm equations). In order to understand the mechanism of MB adsorption on clay, the experimental data were fitted to the aforementioned equilibrium isotherm equations and the different isotherm parameters, obtained from the different plots, are presented in Table 1 2 were obtained when the experimental data were fitted into Freundlich and Halsey isotherm equations (0.999) for modified clay while unmodified clay are 0.971 and 0.987. The description of the sorption of MB on clay by the Freundlich isotherm equations is a pointer to the heterogeneity of the surface with a non-uniform distribution of heat of adsorption over the surface of the clay, while the Halsey isotherm fitting is an indication of the heteroporosity of the surface and the multilayer adsorption nature of the MB on clay.…”

Section: Equilibrium Isotherm Studiesmentioning

confidence: 99%

“…It has also been reported that many dyes and pigments have toxic as well as carcinogenic, mutagenic, and tetratogenic effects on aquatic life as well as humans [2,3]. The removal of dyes and organics in an economic fashion remains an important problem, although a number of successive systems have been developed with the adsorption technique [4].…”

Section: Introductionmentioning

confidence: 99%

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Enhancing Adsorption Capacity of Clay and Application in Dye Removal from Waste Water

Ogunmodede

Adebayo²,

Ojo

2014

ILCPA

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Natural clay has been considered as a potential absorbent for removing pollutants from water and waste water. Nonetheless, the effective application of clay for water treatment is limited due to small surface area and presence of net negative surface charge, leading to it low adsorption capacity. The absorption capacity was boosted via intercalation of CaO derived from snail shell (SS). The methylene blue sorption potential, PZC, and the surface area of unmodified clay sample were substantially enhanced by the intercalation process. The process of sorption of MB from solution was analyzed using five different isotherm models (Langmuir, Freundlich, Temkin, Harkins-Jura, and Halsey isotherm equations). The value of the Langmuir monolayer sorption capacity qm (mg/g) increased from 50.12 to 88.71, PZC values increased from 4.50 to 7.40, and the surface area (m 2 /g) value increased from 27 m 2 /g to 123 m 2 /g after the intercalation process. The experimental data were fitted into two kinetic models: Lagergren pseudo-first order and the chemisorptions pseudo-second order. It was observed that chemisorptions pseudo-second order kinetic model described the sorption process with high coefficients of determination (r2) better than pseudo first other kinetic models. The modification caused no change in the clay surficial microstructure but increased the lattice spacing of the clay framework.

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Section: Equilibrium Isotherm Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancing Adsorption Capacity of Clay and Application in Dye Removal from Waste Water

Ogunmodede

Adebayo²,

Ojo

2014

ILCPA

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“…The R L value implies the adsorption to be unfavourable for R L > 1, linear for R L = 1, favourable for the range 0 < R L < 1 or irreversible for R L = 0 [34].…”

Section: Linear Form Of Langmuir Equation Is Expressed Asmentioning

confidence: 99%

Biomass Enriched with Minerals via Biosorption Process as a Potential Ingredient of Horse Feed

Michalak

Godlewska

Marycz

2018

Waste Biomass Valor

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In the present work, dry plant biomass that is commonly used in horses feeding: alfalfa, chopped grass pellets and chopped grass was used as a biosorbent of microelement ions: Cr(III), Zn(II), Cu(II) and Mn(II). Biosorption process was used to potentially enhance supplementation of minerals in horses diet. In order to characterize the biosorption properties of the examined biomass, preliminary experiments (kinetics and equilibrium studies) were conducted with Cr(III) ions. The effect of pH and initial metal ions concentration (C 0 ) on the biosorption capacity (q) was investigated. On this basis, the best experimental conditions were chosen (pH 5, C S 1.0 g/L (biomass content), C 0 200 mg/L). For them, biosorption of Mn(II), Zn(II), Cu(II) ions was carried out in a periodic and continuous system (biosorption column). Equilibrium of the biosorption was described using Langmuir equation. The mineral composition of the raw and enriched biomass was also examined using ICP-OES, as well as SEM-EDX technique. In general, the best biosorption properties were observed for alfalfa. The maximum biosorption capacity for Zn(II) was 27.5 mg/g, for Cu(II)-38.5 mg/g, for Mn(II)-13.6 mg/g and for Cr(III)-33.2 mg/g. Therefore, the biomass of enriched alfalfa can be recommended as a feed supplement for horses.

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“…The isotherm constants were calculated from the linear form of each model and max and values for Langmuir isotherm, and 1/ values for Freundlich isotherm, and 2 values for both isotherms are given in Table 4. As can be seen from 2 values given in Table 4 The characteristics of the Langmuir isotherm could be expressed by a separation factor, , which is defined as [35] …”

Section: The Effect Of Ph Initial Dye Concentration and Contactmentioning

confidence: 99%

Comparison of Acid Red 114 Dye Adsorption by Fe₃O₄and Fe₃O₄Impregnated Rice Husk Ash

Kaykıoğlu

Güneş

2016

Journal of Nanomaterials

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The removal of Acid Red 114 (AR114) dye by adsorption process, using the magnetic nanoparticle (RHA-MNP) which is produced from rice husk ash burned at 300 ∘ C and the magnetic nanoparticle (MNP, Fe 3 O 4 ), was studied. Batch processes were used under different test parameters: pH (2, 4, 6, and 10) and without pH, initial dye concentration (20,40, 60, 80, and 100 mg/L), and contact time (0, 1, 5, 10, 15, 30, 45, 60, 90, and 150 min). Optimum conditions for AR114 removal were found to be at natural pH (pH without correction) for both adsorbents. Freundlich isotherm was found to be more consistent for MNP and Langmuir isotherm was found to be more consistent for RHA-MNP. The maximum adsorption capacities of MNP and RHA-MNP adsorbents for AR114 dye were equal to 111 mg/g. The kinetic experimental data fitted the pseudo-second-order model for both MNP and RHA-MNP. It can be concluded that RHA-MNP which is a waste could be used as low-cost adsorbent to remove AR114 from aqueous solution.

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The adsorption of dyes onto chitin in fixed bed columns and batch adsorbers

Cited by 98 publications

References 5 publications

Enhancing Adsorption Capacity of Clay and Application in Dye Removal from Waste Water

Enhancing Adsorption Capacity of Clay and Application in Dye Removal from Waste Water

Biomass Enriched with Minerals via Biosorption Process as a Potential Ingredient of Horse Feed

Comparison of Acid Red 114 Dye Adsorption by Fe₃O₄and Fe₃O₄Impregnated Rice Husk Ash

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The adsorption of dyes onto chitin in fixed bed columns and batch adsorbers

Cited by 98 publications

References 5 publications

Enhancing Adsorption Capacity of Clay and Application in Dye Removal from Waste Water

Enhancing Adsorption Capacity of Clay and Application in Dye Removal from Waste Water

Biomass Enriched with Minerals via Biosorption Process as a Potential Ingredient of Horse Feed

Comparison of Acid Red 114 Dye Adsorption by Fe3O4and Fe3O4Impregnated Rice Husk Ash

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Comparison of Acid Red 114 Dye Adsorption by Fe₃O₄and Fe₃O₄Impregnated Rice Husk Ash