Carrier-Facilitated Coupled Transport Through Liquid Membranes

Kislik, Vladimir S.

doi:10.1016/b978-0-444-53218-3.00002-7

Cited by 13 publications

(6 citation statements)

References 78 publications

(141 reference statements)

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“…It was assumed that values of activation energy lower than 20 kJ/mol indicated diffusive transport, and when ( E a ) was higher than 42 kJ/mol, the transport was controlled by a chemical reaction. In cases where the value of activation energy is in the range of 20 to 42 kJ/mol, the transport rate depends on both the diffusion process and chemical reaction [ 40 ]. In our case, the flux of Ag(I) transport through polymer inclusion membranes with KP increased as the temperature increased; however, the value of E a indicated that the process was controlled by the mixed kinetics.…”

Section: Resultsmentioning

confidence: 99%

Selective Transport of Ag(I) through a Polymer Inclusion Membrane Containing a Calix[4]pyrrole Derivative from Nitrate Aqueous Solutions

Nowik-Zając

Zawierucha

Kozłowski

2020

IJMS

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Cellulose-triacetate-based polymer inclusion membranes (PIMs) with different concentrations of a calixpyrrole ester derivative as the membrane carrier were studied to determine their ability to transport Ag(I) from aqueous nitrate solutions. The effects of the concentrations of ion carriers and metal ions, the pH of the source aqueous phase, and stripping agents on the effective transport of Ag(I) were assessed. All studied parameters were found to be important factors for the transport of Ag(I) metal ions. The initial fluxes were determined at different temperatures. The prepared membranes were found to be highly permeable. The selectivity of silver transport from an aqueous solution containing Ag(I), Cu(II), Pb(II), Cd(II), Ni(II), Zn(II), and Co(II) ions was also investigated.

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Section: Resultsmentioning

confidence: 99%

Selective Transport of Ag(I) through a Polymer Inclusion Membrane Containing a Calix[4]pyrrole Derivative from Nitrate Aqueous Solutions

Nowik-Zając

Zawierucha

Kozłowski

2020

IJMS

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“…This indicates that as the feed flow rate increases, the extraction efficiency increases. This can be explained where low feed flow rate is inadequate to reduce the thickness of boundary layer near feedmembrane interface but at the same time increase their thickness [13]. The phenol molecules experience high resistance to diffuse across the boundary layer near feed-membrane interface and thus reducing the extraction efficiency.…”

Section: Effect Of Feed Flow Ratementioning

confidence: 99%

Removal of Phenol from Wastewater by Supported Liquid Membrane Process

et al. 2015

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Phenol is considered a pollutant in the environment due to its toxicity and carcinogenic effect. Supported liquid membrane (SLM) is a good and promising technology for the removal of phenol from wastewater because it provides maximum driving force for the separation of targeted solute and simultaneous extraction and stripping process which lead to excellent separation. In this research, kerosene and palm oil liquid membranes were used as liquid membrane phase, aqueous phenol as the feed phase and aqueous sodium hydroxide as the stripping phase. Several factors such as feed phase pH, feed phase flow rate and concentration of stripping phase were studied. The results show that the best extraction performance can achieve 35% at pH 4 of feed phase, 150 ml/min feed flow rate and 1.0 M of stripping phase concentration. The result was used to determine the probability of using palm oil as a liquid membrane. In the determination of the potential of using palm oil as the membrane phase, the results show that an equal portion of palm oil and kerosene mixture performed the best extraction with 43% efficiency.

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“…O complexo é transportado por difusão através da membrana e depois por convecção na fase orgânica, enquanto que o H + é transportado pela fase aquosa (Kislik, 2010, Nattaya, 2014. …”

Section: Mecanismo De Transporte Da Extração Do íOn Cobreunclassified

“…Além de oferecerem economia de energia, seletividade, podem trabalhar com substâncias termossensíveis -como fármacos e produtos alimentícios -, também são de fácil operação e precisam de pouca mão de obra (Habert et al, 2006;Kislik, 2010).…”

Section: Introductionunclassified

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Simulação Da Cinética De Reação Superficial Da Extração Do Íon Cobre Utilizando Contactores Por Membranas

Baia¹,

Silva²,

Oliveira³

2015

Anais Do Congresso Brasileiro De Engenharia Química Em Iniciação Científica - Cobeq IC 2015

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RESUMO -A técnica de separação por membranas vem ganhando destaque nas pesquisas e em algumas indústrias por apresentarem eficiência, seletividade e economia de energia, dentre outras qualidades. A extração de metais nobres através do uso de membranas de fibra oca é uma das técnicas bem sucedidas, pois possibilita a extração do metal de interesse com menor quantidade de solvente e economia de capital, além de poder ser usada para reaproveitar partículas do metal nobre presente nos resíduos da mineração, gerando um maior rendimento e menor impacto ambiental. O presente trabalho tem por objetivo estudar e simular a cinética de extração do íon cobre através do processo de separação por membranas de fibra-oca e calcular a eficiência dessa extração. O software utilizado para realizar as simulações foi o COMSOL Multiphysics® v. 4.4. O modelo cinético que melhor se ajustou aos dados experimentais foi o para reação superficial de segunda ordem irreversível, de acordo com a literatura. O erro estimado médio calculado foi 6,399 %. O valor máximo para a eficiência da extração foi 95,18 %.

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Carrier-Facilitated Coupled Transport Through Liquid Membranes

Cited by 13 publications

References 78 publications

Selective Transport of Ag(I) through a Polymer Inclusion Membrane Containing a Calix[4]pyrrole Derivative from Nitrate Aqueous Solutions

Selective Transport of Ag(I) through a Polymer Inclusion Membrane Containing a Calix[4]pyrrole Derivative from Nitrate Aqueous Solutions

Removal of Phenol from Wastewater by Supported Liquid Membrane Process

Simulação Da Cinética De Reação Superficial Da Extração Do Íon Cobre Utilizando Contactores Por Membranas

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