Kinetic analysis of coupled transport of thiocyanate ions through liquid membranes at different temperatures

Kobya, Mehmet; Topçu, Nazmi; Demircioğlu, Nuhi

doi:10.1016/s0376-7388(96)00348-1

Cited by 37 publications

(10 citation statements)

References 12 publications

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“…The transport of Hg 2+ ions was carried out with the consecutive irreversible reactions. The calculating of activation energy with respect to the membrane entrance and exit rates is not the corrected procedure as pointed out by Kobya et al [19] Therefore, the activation energy values were calculated from the maximum membrane exit flux ðJ max a Þ versus (1/T) plots, as presented Fig. 7.…”

Section: Resultsmentioning

confidence: 99%

Kinetics of Mercury(II) Transport Through a Bulk Liquid Membrane Containing Calix[4]arene Derivatives as Carrier

Alpoğuz

Memon

Ersöz

2003

Separation Science and Technology

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The kinetics of transport of mercury (II) ions through a bulk liquid membrane (chloroform) containing calix[4]arene nitrile derivatives as a carrier was examined at different temperatures and different stirring rates. The kinetics of mercury (II) transport could be analyzed in the formalism of two, consecutive, irreversible first-order reactions. The influence of temperature and stirring rate on kinetic parameters also have been investigated. The membrane entrance rate, k 1 , and the membrane exit rate, k 2 , increased with increasing temperature and increasing stirring rate. For maximum membrane exit fluxes, J max a ; the activation energies were found as 1.923^0.15 and 2.112^0.2 kj/mol, for ligand carrier 1 and 2, respectively. The values for the found activation energy indicate that the process is controlled by species diffusion.

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Section: Resultsmentioning

confidence: 99%

Kinetics of Mercury(II) Transport Through a Bulk Liquid Membrane Containing Calix[4]arene Derivatives as Carrier

Alpoğuz

Memon

Ersöz

2003

Separation Science and Technology

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“…(6)- (8) are also valid in the case of unequal volumes of d, m, and a phases. [19] Time dependence of dimensionless parameters of R d , R m , and R a are defined in a molar ratio manner of Hg(II) ions in cotransport through liquid membrane with 5 Â 10 25 M of carrier 1 in CHCl 3 at 298 K and 250 rpm are given in Fig. 3.…”

Section: Kinetic Proceduresmentioning

confidence: 99%

Kinetic Study of Hg(II) Transport Through a Bulk Liquid Membrane Containing Ester Derivative ofbis‐Calix[4]arene

Alpaydın

Ersöz

2005

Separation Science and Technology

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A kinetic study of Hg(II) transport from an aqueous donor solution into an aqueous acceptor solution through a bulk liquid membrane containing N,N 0 -bis [carbonylmethoxy(5,11,17,23-tetra-tert-butyl-25,26,27-tris-(ethoxycarbonyl-methoxy)calix(4)arenyl)]-1,2-diaminoethane as a carrier was studied. The kinetic parameters (k 1d , k 2m , k 2a , t max , R m max , J d max , J a max ) for the transport were investigated in terms of the effect of temperature, the stirring rate, the carrier concentration, and the type of solvent. In this study, the pseudo-first-order apparent rate constant of the interfacial transport of the Hg(II) is determined by using the 2189 spectrophotometric method. The kinetics of the transport was analyzed in the formalism of two consecutive irreversible first-order reactions. The membrane entrance and exit rate constants were increased with increasing of temperature, stirring rate, and carrier concentration. The membrane entrance and exit rate constants depended on the type of solvent and was found to be in the order of CH 2 Cl 2 . CHCl 3 . CCl 4 . The activation energy values are calculated as 25.50 + 2.20 and 45.62 + 4.38 kJ mol 21 for extraction and reextraction, respectively. The values of the calculated activation energy indicate that the process is diffusionally controlled by species.

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“…Because Mo(VI) ion transportation occurs as irreversible reactions of consecutive first order, it is not very suitable to calculate the activation energy of the process according to the input and output transport rate constants. Therefore, calculation of the activation energy using the following Arrhenius equation seems more appropriate [28]. The activation energy was calculated by plot of the maximum membrane exit flux (J max a ) versus (1/T) at 50 mL/min (Eq.…”

Section: Effect Of Temperature On the Extraction Of Mo(vi) Ions By Usmentioning

confidence: 99%

“…Since there is very strong effect of temperature on rate constants, activation energy of diffusion-controlled processes is quite low but it is very high for chemically-controlled process [28,29].…”

Section: Effect Of Temperature On the Extraction Of Mo(vi) Ions By Usmentioning

confidence: 99%

Transportation and kinetic analysis of Mo(VI) ions through a MDLM system containing TNOA as carrier

Donat

Durmaz

Çetişli

2015

Journal of Hazardous Materials

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Kinetic analysis of coupled transport of thiocyanate ions through liquid membranes at different temperatures

Cited by 37 publications

References 12 publications

Kinetics of Mercury(II) Transport Through a Bulk Liquid Membrane Containing Calix[4]arene Derivatives as Carrier

Kinetics of Mercury(II) Transport Through a Bulk Liquid Membrane Containing Calix[4]arene Derivatives as Carrier

Kinetic Study of Hg(II) Transport Through a Bulk Liquid Membrane Containing Ester Derivative ofbis‐Calix[4]arene

Transportation and kinetic analysis of Mo(VI) ions through a MDLM system containing TNOA as carrier

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