Kinetics and thermodynamics of adsorption of congo red on cellulose

Samiey, Babak; Dargahi, Mohammad Rafi

doi:10.2478/s11532-010-0055-6

Cited by 51 publications

(62 citation statements)

References 31 publications

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“…As reported [1][2][3], at each constant temperature, ʋ 0i and i a values decrease from the first to the second region and in each region their values increase with increase in shaking velocity. Also, in each region, ʋ 0i and i a values increase with increase in temperature [1,2]. The KASRA equation is expressed as q 01 and t 01 values are equal to zero and q 02 and t 02 are the coordinates of ssr point.…”

Section: Introductionmentioning

confidence: 81%

“…[JG] [2,3,11] and even in some cases equilibrium concentration of adsorbate is 10% of its initial concentration [1,2]. Thus, the pseudo-first-and pseudo-second-order assumptions are not satisfied and they do only the mathematical fitting of data.…”

Section: Pseudo-first-and Pseudo-second-order Equationsmentioning

confidence: 99%

“…The KASRA (Kinetics of Adsorption Study in the Regions with Constant Adsorption Acceleration) equation was introduced by Samiey [1] in 2013 and is as follows …”

Section: Introductionmentioning

confidence: 99%

“…

At first, the KASRA model and KASRA equation are discussed [1][2][3]. KASRA is an abbreviation for "Kinetics of Adsorption Study in the Regions with Constant Adsorption Acceleration".

…”

mentioning

confidence: 99%

“…KASRA is an abbreviation for "Kinetics of Adsorption Study in the Regions with Constant Adsorption Acceleration". The KASRA model was presented by Samiey [1] in 2013 and is based on the following assumptions: (1) each time range with constant adsorption acceleration, is named a "region", (2) there are two regions before attaining plateau region, (3) the boundaries between the first and second regions and the second and third (plateau) regions are named "starting second region" (abbreviated as ssr) and "kinetics of adsorption termination" (abbreviated as kat) points, respectively and are determined by the KASRA equation, (Figures 1-4). Due to different features of the first and second regions, parameters obtained from a kinetic equation (such as the pore-diffusion, Avrami and Elovich equations, etc.)…”

mentioning

confidence: 99%

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A New Approach for Analysis of Adsorption from Liquid Phase: A Critical Review

Abdollahi¹

2015

J Pollut Eff Cont

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At first, the KASRA model and KASRA equation are discussed [1][2][3]. KASRA is an abbreviation for "Kinetics of Adsorption Study in the Regions with Constant Adsorption Acceleration". The KASRA model was presented by Samiey [1] in 2013 and is based on the following assumptions: (1) each time range with constant adsorption acceleration, is named a "region", (2) there are two regions before attaining plateau region, (3) the boundaries between the first and second regions and the second and third (plateau) regions are named "starting second region" (abbreviated as ssr) and "kinetics of adsorption termination" (abbreviated as kat) points, respectively and are determined by the KASRA equation, (Figures 1-4). Due to different features of the first and second regions, parameters obtained from a kinetic equation (such as the pore-diffusion, Avrami and Elovich equations, etc.) for these two regions are different from each other and the related equations for these regions come different pathways to the point q t =0 at t=0 (or q 01 according to the KASRA model). It is good to say that KASRA is a Persian word meaning king. AbstractIn different concentration ranges of adsorbed species, various interactions occur between them and surface adsorption sites and there are different regions in an adsorption isotherm. In the common method for study of adsorption process, all of these regions are considered as one region and thus there are concerns regarding using adsorption equations. In this work, based on the KASRA and ARIAN regional models, a new method is presented for analysis of adsorption kinetic and thermodynamic data, respectively. The KASRA and ARIAN models are three-and four-region models, respectively and adsorption equations are used on the basis assumptions used in these models. According to the ARIAN model, adsorption binding constant of each region of an adsorption isotherm is different from the other regions. On the other hand, based on the kinetic KASRA model and ideal-second-order (ISO) equation, during the adsorption in each initial adsorbate concentration, different interactions occur between adsorbate species and adsorbent surface sites and thus the observed adsorption binding constant is an average value of these binding constants.

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Section: Introductionmentioning

confidence: 81%

Section: Pseudo-first-and Pseudo-second-order Equationsmentioning

confidence: 99%

“…The KASRA (Kinetics of Adsorption Study in the Regions with Constant Adsorption Acceleration) equation was introduced by Samiey [1] in 2013 and is as follows …”

Section: Introductionmentioning

confidence: 99%

“…

At first, the KASRA model and KASRA equation are discussed [1][2][3]. KASRA is an abbreviation for "Kinetics of Adsorption Study in the Regions with Constant Adsorption Acceleration".

…”

mentioning

confidence: 99%

mentioning

confidence: 99%

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A New Approach for Analysis of Adsorption from Liquid Phase: A Critical Review

Abdollahi¹

2015

J Pollut Eff Cont

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Black wattle tannin‐immobilized mesostructured collagen as a promising adsorbent for cationic organic dyes (methylene blue) removal in batch and continuous fixed‐bed systems

Liu

Qin

et al. 2022

J of Applied Polymer Sci

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Black wattle tannin‐immobilized mesostructured collagen (TC) was synthesized by using exfoliated mesostructured collagen as carriers. The structure of TC was characterized by scanning electron microscope, Fourier transform infrared spectroscopy and zeta potential test. Methylene blue (MB) as a cationic dye model was applied to evaluate the adsorption ability of TC through batch and continuous fixed‐bed system experiments. Results of batch adsorption experiment indicated that the adsorption behaviors of TC conformed to the Freundlich isotherm model and the pseudo‐second‐order kinetic model as well as the intraparticle diffusion model. The maximum adsorption amount (Qmax) of TC was 46.5 mg/g at 303 K. Fixed‐bed adsorption experiments revealed that the initial concentration, flow rate, and column height significantly influenced the removal of MB, and all breakthrough curves were well fitted by Thomas and Yoon‐Nelson models. Adsorption–desorption experiments demonstrated that TC possessed excellent stability and reusable ability. The removal efficiency of MB was still above 80% after five adsorption–desorption cycles. The excellent adsorption capacity of TC owed to the immobilized tannins as binding sites to MB and support of mesostructured collagen with hierarchical structure. This work developed a novel collagen‐based adsorption material for efficient removal of cationic dye.

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Tannin‐immobilized cellulose microspheres as effective adsorbents for removing cationic dye (Methylene Blue) from aqueous solution

Pei

et al. 2016

J of Chemical Tech & Biotech

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BACKGROUND Tannin‐immobilized cellulose (T/C) microspheres were fabricated by a facile homogeneous reaction in a water/oil (W/O) emulsion for the removal of cationic dye from aqueous solution. The microspheres were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and Zeta potentials test. Setting methylene blue (MB) as a cationic dye model, the adsorption isotherms, kinetics and effect factors of MB adsorption were investigated to evaluate the effectiveness for dye removal. RESULTS The microspheres exhibited porous structure. Cellulose contributed to provide a support for the porous structure, and immobilized tannins acted as adsorbent sites which combined with MB by electrostatic attraction, resulting in the attractive adsorption ability of T/C microspheres. Microspheres exhibited rapid adsorption rate even when the initial MB concentration was 1500 mg L−1. The pseudo‐first‐order, pseudo‐second‐order and intraparticle diffusion models were used to fit adsorption data in the kinetic studies. Results indicated that the adsorption kinetic was more accurately described by the pseudo‐second‐order model. It has been demonstrated that the better agreement was with the Langmuir isotherm with correlation coefficient >0.9996. Regeneration experiments showed that T/C microspheres can be reused at least three times without obvious loss of their original adsorption capacity. CONCLUSION The results revealed that the T/C microspheres can be considered as a stable and effective adsorbent for cationic dye removal from industrial effluents. Tannin immobilization and material forming were simultaneously implemented by a facile homogeneous reaction in W/O emulsion, providing a new pathway to fabricate tannin‐immobilized materials for water treatment. © 2016 Society of Chemical Industry

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Kinetics and thermodynamics of adsorption of congo red on cellulose

Cited by 51 publications

References 31 publications

A New Approach for Analysis of Adsorption from Liquid Phase: A Critical Review

A New Approach for Analysis of Adsorption from Liquid Phase: A Critical Review

Black wattle tannin‐immobilized mesostructured collagen as a promising adsorbent for cationic organic dyes (methylene blue) removal in batch and continuous fixed‐bed systems

Tannin‐immobilized cellulose microspheres as effective adsorbents for removing cationic dye (Methylene Blue) from aqueous solution

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