Application of linear model of sorption dynamics to the comparison of solid phase extraction systems of phenol

Tsysin, G. I.; Ковалев, Игорь Александрович; Nesterenko, Pavel N.; Penner, Natasha; Filippov, Oleg A.

doi:10.1016/s1383-5866(02)00181-8

Cited by 19 publications

(4 citation statements)

References 25 publications

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“…In this work, we focused on the dynamic behaviour of the process via breakthrough curves and analyzed the rate-controlling step of the process on the bases of homogeneous diffusion model. Various methods for calculating the breakthrough data have been recently presented by several investigators [16][17][18][19][20][21][22][23][24][25][26]. However, these methods are very complex.…”

Section: Introductionmentioning

confidence: 99%

Removal of aniline from aqueous solution by PVC-CDAE ligand-exchanger

Gürten

Uçan

Özler

et al. 2005

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Removal of aniline from aqueous solution by PVC-CDAE ligand-exchanger

Gürten

Uçan

Özler

et al. 2005

Journal of Hazardous Materials

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“…This study was conducted to examine the rate-controlling step of adenine and adenosine adsorption on the cobalt-CMEDA-PVC resin on the basis of breakthrough curves. Various methods for calculating the breakthrough data have been presented by several investigators [11][12][13][14][15][16][17][18][19][20][21][22]. However, in this study, the kinetic data for the single-component systems were acquired easily from the breakthrough curves of the ligands by the equivalent points method [23].…”

Section: Introductionmentioning

confidence: 99%

Kinetics of Diffusion-Controlled Adsorption of Adenine and Adenosine in a Carboxymethyl Diaminoethane Pvc-Mediated Column System

Ayar

2015

Progress in Reaction Kinetics and Mechanism

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The adsorption kinetics of adenine and adenosine on a ligand-exchange matrix, carboxymethyl diaminoethane poly(vinyl chloride) in cobalt form (cobalt-CMEDA-PVC), have been studied in a fixed-bed column system. The initial ligand concentrations ranged between 1.25x10 -5 and 2.0x10 -4 mol L -1 . The kinetic studies were carried out spectrophotometrically, in order to determine the ratecontrolling step of the adsorption. The kinetic data of the single-component systems were acquired from the breakthrough curves of the ligands on the basis of the equivalent points method. In this study, the homogeneous diffusion model was adapted to a fixed-bed column system to describe the differentiation in the ligand concentration of the effluent, beginning from breakthrough point as a function of time. The results obtained for the adsorption kinetics indicated that the diffusion step plays a significant role in the adsorption kinetics of the ligands, due to the fact that the adsorption performance was strongly affected by the initial concentration of ligands.

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“…Diffusion processes control the release of elements from soil in a continuous leaching environment. These diffusion processes can be described by apparent solid phase diffusion , liquid film diffusion , , or both. The apparent solid phase diffusion contains effects due to other mechanisms like adsorption, soil−water partitioning and solubility along with soil composition and porosity .…”

Section: Introductionmentioning

confidence: 99%

Assessment of Physical Leaching Processes of Some Elements in Soil upon Ingestion by Continuous Leaching and Modeling

Beeston

Pohar

Elteren

et al. 2010

Environ. Sci. Technol.

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The physical processes controlling the desorption of some elements (B, Cd, Co, Mn, Ni, and Sr) from soils in a continuous leaching system representing the human stomach are investigated here by fitting experimental leaching data to a mathematical particle diffusion model. Soil samples (50 mg) from Cornwall, UK, contained in a flow-through extraction chamber (ca. 6.5 mL) were intimately contacted with artificial gastric solution at various flow rates (0.42-1.42 mL min(-1)) for up to ca. 4 h, followed by analysis of the fractions collected with inductively coupled plasma mass spectrometry (ICP-MS). The leaching profiles of the various elements were fitted to a mathematical model incorporating two mass transfer processes (liquid film diffusion and apparent solid phase diffusion) to determine the effective external mass transfer coefficient (beta) and the apparent intraparticle soil diffusion coefficient (D(a)). A system of partial differential equations was solved numerically with a finite difference discretization of the computational domain allowing the rate limiting physical desorption process(es) for each element to be determined. The (thermodynamic) driving force of the leaching process is defined by the distribution coefficient (K(d0)) between soil and leachant. Although the K(d0) values investigated are very similar (ca. 6-15 L kg(-1)) for the elements studied with the exception of B (ca. 2.7 L kg(-1)), the leaching profiles are very different due to diffusion-limited processes. The elements may be classified as limited by beta (B, Sr, and Cd), by D(a) (Co, and Mn) or by beta and D(a) (Ni). This results in quantifiable parameters for the liability of elements in soil upon ingestion which may be implemented in future risk assessment protocols.

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Application of linear model of sorption dynamics to the comparison of solid phase extraction systems of phenol

Cited by 19 publications

References 25 publications

Removal of aniline from aqueous solution by PVC-CDAE ligand-exchanger

Removal of aniline from aqueous solution by PVC-CDAE ligand-exchanger

Kinetics of Diffusion-Controlled Adsorption of Adenine and Adenosine in a Carboxymethyl Diaminoethane Pvc-Mediated Column System

Assessment of Physical Leaching Processes of Some Elements in Soil upon Ingestion by Continuous Leaching and Modeling

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