The Experts below are selected from a list of 19218 Experts worldwide ranked by ideXlab platform
M A Andreeva - One of the best experts on this subject based on the ideXlab platform.
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effect of homogenization and hydrophobization of a cation exchange membrane surface on its scaling in the presence of calcium and Magnesium Chlorides during electrodialysis
Journal of Membrane Science, 2017Co-Authors: M A Andreeva, N D Pismenskaya, V V Nikonenko, L Dammak, C Larchet, Daniel Grande, N A KononenkoAbstract:Abstract In this paper, two cation-exchange membranes, i.e. MK-40 and MK-40 MOD , were studied by chronopotentiometry and voltammetry, MK-40 MOD being obtained by covering the heterogeneous surface of a commercial MK-40 membrane with a homogeneous 20 µm thick Nafion ® film. Electrodialysis process was realized in an electrodialysis flow-through laboratory cell, in which the cation-exchange membrane under study formed a desalination chamber with an auxiliary anion-exchange (Neosepta AMX-SB) membrane. 0.02 M and 0.04 M solutions of CaCl 2 , MgCl 2 and NaCl were used. The current densities were changed in the range from 0.25 i lim t h to 2.5 i lim t h , where the theoretical limiting current density, i lim t h , was calculated using the Leveque equation. The potential drop over the modified MK-40 MOD membrane and the water splitting at this membrane turned out to be lower in all studied cases. Formation of scaling was observed only in the case of the MK-40/0.04 M MgCl 2 system at current densities in the range from 1.1 i lim t h to 1.4 i lim t h . For these current densities, the (quasi)steady state value of potential drop slowly increased with time and the crystals of Mg(OH) 2 were found on the ion-exchange particles embedded onto the MK-40 membrane surface facing the desalination chamber. At higher currents, stronger electroconvection at this membrane and higher water splitting at the AMX-SB membrane (the latter providing lower pH in the desalination chamber) prevented scaling. No scaling was found on the modified membrane at any current. It is due to the Nafion ® film, which is relatively more hydrophobic than pristine MK-40 and which provides a “better” distribution of current lines near the surface, thus enhancing electroconvection and decreasing water splitting.
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effect of homogenization and hydrophobization of a cation exchange membrane surface on its scaling in the presence of calcium and Magnesium Chlorides during electrodialysis
Journal of Membrane Science, 2017Co-Authors: M A Andreeva, N D Pismenskaya, V V Nikonenko, L Dammak, C Larchet, Daniel Grande, V V Gil, N A KononenkoAbstract:Abstract In this paper, two cation-exchange membranes, i.e. MK-40 and MK-40MOD, were studied by chronopotentiometry and voltammetry, MK-40MOD being obtained by covering the heterogeneous surface of a commercial MK-40 membrane with a homogeneous 20 µm thick Nafion® film. Electrodialysis process was realized in an electrodialysis flow-through laboratory cell, in which the cation-exchange membrane under study formed a desalination chamber with an auxiliary anion-exchange (Neosepta AMX-SB) membrane. 0.02 M and 0.04 M solutions of CaCl2, MgCl2 and NaCl were used. The current densities were changed in the range from 0.25 i lim t h to 2.5 i lim t h , where the theoretical limiting current density, i lim t h , was calculated using the Leveque equation. The potential drop over the modified MK-40MOD membrane and the water splitting at this membrane turned out to be lower in all studied cases. Formation of scaling was observed only in the case of the MK-40/0.04 M MgCl2 system at current densities in the range from 1.1 i lim t h to 1.4 i lim t h . For these current densities, the (quasi)steady state value of potential drop slowly increased with time and the crystals of Mg(OH)2 were found on the ion-exchange particles embedded onto the MK-40 membrane surface facing the desalination chamber. At higher currents, stronger electroconvection at this membrane and higher water splitting at the AMX-SB membrane (the latter providing lower pH in the desalination chamber) prevented scaling. No scaling was found on the modified membrane at any current. It is due to the Nafion® film, which is relatively more hydrophobic than pristine MK-40 and which provides a “better” distribution of current lines near the surface, thus enhancing electroconvection and decreasing water splitting.
N A Kononenko - One of the best experts on this subject based on the ideXlab platform.
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effect of homogenization and hydrophobization of a cation exchange membrane surface on its scaling in the presence of calcium and Magnesium Chlorides during electrodialysis
Journal of Membrane Science, 2017Co-Authors: M A Andreeva, N D Pismenskaya, V V Nikonenko, L Dammak, C Larchet, Daniel Grande, N A KononenkoAbstract:Abstract In this paper, two cation-exchange membranes, i.e. MK-40 and MK-40 MOD , were studied by chronopotentiometry and voltammetry, MK-40 MOD being obtained by covering the heterogeneous surface of a commercial MK-40 membrane with a homogeneous 20 µm thick Nafion ® film. Electrodialysis process was realized in an electrodialysis flow-through laboratory cell, in which the cation-exchange membrane under study formed a desalination chamber with an auxiliary anion-exchange (Neosepta AMX-SB) membrane. 0.02 M and 0.04 M solutions of CaCl 2 , MgCl 2 and NaCl were used. The current densities were changed in the range from 0.25 i lim t h to 2.5 i lim t h , where the theoretical limiting current density, i lim t h , was calculated using the Leveque equation. The potential drop over the modified MK-40 MOD membrane and the water splitting at this membrane turned out to be lower in all studied cases. Formation of scaling was observed only in the case of the MK-40/0.04 M MgCl 2 system at current densities in the range from 1.1 i lim t h to 1.4 i lim t h . For these current densities, the (quasi)steady state value of potential drop slowly increased with time and the crystals of Mg(OH) 2 were found on the ion-exchange particles embedded onto the MK-40 membrane surface facing the desalination chamber. At higher currents, stronger electroconvection at this membrane and higher water splitting at the AMX-SB membrane (the latter providing lower pH in the desalination chamber) prevented scaling. No scaling was found on the modified membrane at any current. It is due to the Nafion ® film, which is relatively more hydrophobic than pristine MK-40 and which provides a “better” distribution of current lines near the surface, thus enhancing electroconvection and decreasing water splitting.
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effect of homogenization and hydrophobization of a cation exchange membrane surface on its scaling in the presence of calcium and Magnesium Chlorides during electrodialysis
Journal of Membrane Science, 2017Co-Authors: M A Andreeva, N D Pismenskaya, V V Nikonenko, L Dammak, C Larchet, Daniel Grande, V V Gil, N A KononenkoAbstract:Abstract In this paper, two cation-exchange membranes, i.e. MK-40 and MK-40MOD, were studied by chronopotentiometry and voltammetry, MK-40MOD being obtained by covering the heterogeneous surface of a commercial MK-40 membrane with a homogeneous 20 µm thick Nafion® film. Electrodialysis process was realized in an electrodialysis flow-through laboratory cell, in which the cation-exchange membrane under study formed a desalination chamber with an auxiliary anion-exchange (Neosepta AMX-SB) membrane. 0.02 M and 0.04 M solutions of CaCl2, MgCl2 and NaCl were used. The current densities were changed in the range from 0.25 i lim t h to 2.5 i lim t h , where the theoretical limiting current density, i lim t h , was calculated using the Leveque equation. The potential drop over the modified MK-40MOD membrane and the water splitting at this membrane turned out to be lower in all studied cases. Formation of scaling was observed only in the case of the MK-40/0.04 M MgCl2 system at current densities in the range from 1.1 i lim t h to 1.4 i lim t h . For these current densities, the (quasi)steady state value of potential drop slowly increased with time and the crystals of Mg(OH)2 were found on the ion-exchange particles embedded onto the MK-40 membrane surface facing the desalination chamber. At higher currents, stronger electroconvection at this membrane and higher water splitting at the AMX-SB membrane (the latter providing lower pH in the desalination chamber) prevented scaling. No scaling was found on the modified membrane at any current. It is due to the Nafion® film, which is relatively more hydrophobic than pristine MK-40 and which provides a “better” distribution of current lines near the surface, thus enhancing electroconvection and decreasing water splitting.
Daniel Grande - One of the best experts on this subject based on the ideXlab platform.
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effect of homogenization and hydrophobization of a cation exchange membrane surface on its scaling in the presence of calcium and Magnesium Chlorides during electrodialysis
Journal of Membrane Science, 2017Co-Authors: M A Andreeva, N D Pismenskaya, V V Nikonenko, L Dammak, C Larchet, Daniel Grande, N A KononenkoAbstract:Abstract In this paper, two cation-exchange membranes, i.e. MK-40 and MK-40 MOD , were studied by chronopotentiometry and voltammetry, MK-40 MOD being obtained by covering the heterogeneous surface of a commercial MK-40 membrane with a homogeneous 20 µm thick Nafion ® film. Electrodialysis process was realized in an electrodialysis flow-through laboratory cell, in which the cation-exchange membrane under study formed a desalination chamber with an auxiliary anion-exchange (Neosepta AMX-SB) membrane. 0.02 M and 0.04 M solutions of CaCl 2 , MgCl 2 and NaCl were used. The current densities were changed in the range from 0.25 i lim t h to 2.5 i lim t h , where the theoretical limiting current density, i lim t h , was calculated using the Leveque equation. The potential drop over the modified MK-40 MOD membrane and the water splitting at this membrane turned out to be lower in all studied cases. Formation of scaling was observed only in the case of the MK-40/0.04 M MgCl 2 system at current densities in the range from 1.1 i lim t h to 1.4 i lim t h . For these current densities, the (quasi)steady state value of potential drop slowly increased with time and the crystals of Mg(OH) 2 were found on the ion-exchange particles embedded onto the MK-40 membrane surface facing the desalination chamber. At higher currents, stronger electroconvection at this membrane and higher water splitting at the AMX-SB membrane (the latter providing lower pH in the desalination chamber) prevented scaling. No scaling was found on the modified membrane at any current. It is due to the Nafion ® film, which is relatively more hydrophobic than pristine MK-40 and which provides a “better” distribution of current lines near the surface, thus enhancing electroconvection and decreasing water splitting.
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effect of homogenization and hydrophobization of a cation exchange membrane surface on its scaling in the presence of calcium and Magnesium Chlorides during electrodialysis
Journal of Membrane Science, 2017Co-Authors: M A Andreeva, N D Pismenskaya, V V Nikonenko, L Dammak, C Larchet, Daniel Grande, V V Gil, N A KononenkoAbstract:Abstract In this paper, two cation-exchange membranes, i.e. MK-40 and MK-40MOD, were studied by chronopotentiometry and voltammetry, MK-40MOD being obtained by covering the heterogeneous surface of a commercial MK-40 membrane with a homogeneous 20 µm thick Nafion® film. Electrodialysis process was realized in an electrodialysis flow-through laboratory cell, in which the cation-exchange membrane under study formed a desalination chamber with an auxiliary anion-exchange (Neosepta AMX-SB) membrane. 0.02 M and 0.04 M solutions of CaCl2, MgCl2 and NaCl were used. The current densities were changed in the range from 0.25 i lim t h to 2.5 i lim t h , where the theoretical limiting current density, i lim t h , was calculated using the Leveque equation. The potential drop over the modified MK-40MOD membrane and the water splitting at this membrane turned out to be lower in all studied cases. Formation of scaling was observed only in the case of the MK-40/0.04 M MgCl2 system at current densities in the range from 1.1 i lim t h to 1.4 i lim t h . For these current densities, the (quasi)steady state value of potential drop slowly increased with time and the crystals of Mg(OH)2 were found on the ion-exchange particles embedded onto the MK-40 membrane surface facing the desalination chamber. At higher currents, stronger electroconvection at this membrane and higher water splitting at the AMX-SB membrane (the latter providing lower pH in the desalination chamber) prevented scaling. No scaling was found on the modified membrane at any current. It is due to the Nafion® film, which is relatively more hydrophobic than pristine MK-40 and which provides a “better” distribution of current lines near the surface, thus enhancing electroconvection and decreasing water splitting.
C Larchet - One of the best experts on this subject based on the ideXlab platform.
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effect of homogenization and hydrophobization of a cation exchange membrane surface on its scaling in the presence of calcium and Magnesium Chlorides during electrodialysis
Journal of Membrane Science, 2017Co-Authors: M A Andreeva, N D Pismenskaya, V V Nikonenko, L Dammak, C Larchet, Daniel Grande, N A KononenkoAbstract:Abstract In this paper, two cation-exchange membranes, i.e. MK-40 and MK-40 MOD , were studied by chronopotentiometry and voltammetry, MK-40 MOD being obtained by covering the heterogeneous surface of a commercial MK-40 membrane with a homogeneous 20 µm thick Nafion ® film. Electrodialysis process was realized in an electrodialysis flow-through laboratory cell, in which the cation-exchange membrane under study formed a desalination chamber with an auxiliary anion-exchange (Neosepta AMX-SB) membrane. 0.02 M and 0.04 M solutions of CaCl 2 , MgCl 2 and NaCl were used. The current densities were changed in the range from 0.25 i lim t h to 2.5 i lim t h , where the theoretical limiting current density, i lim t h , was calculated using the Leveque equation. The potential drop over the modified MK-40 MOD membrane and the water splitting at this membrane turned out to be lower in all studied cases. Formation of scaling was observed only in the case of the MK-40/0.04 M MgCl 2 system at current densities in the range from 1.1 i lim t h to 1.4 i lim t h . For these current densities, the (quasi)steady state value of potential drop slowly increased with time and the crystals of Mg(OH) 2 were found on the ion-exchange particles embedded onto the MK-40 membrane surface facing the desalination chamber. At higher currents, stronger electroconvection at this membrane and higher water splitting at the AMX-SB membrane (the latter providing lower pH in the desalination chamber) prevented scaling. No scaling was found on the modified membrane at any current. It is due to the Nafion ® film, which is relatively more hydrophobic than pristine MK-40 and which provides a “better” distribution of current lines near the surface, thus enhancing electroconvection and decreasing water splitting.
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effect of homogenization and hydrophobization of a cation exchange membrane surface on its scaling in the presence of calcium and Magnesium Chlorides during electrodialysis
Journal of Membrane Science, 2017Co-Authors: M A Andreeva, N D Pismenskaya, V V Nikonenko, L Dammak, C Larchet, Daniel Grande, V V Gil, N A KononenkoAbstract:Abstract In this paper, two cation-exchange membranes, i.e. MK-40 and MK-40MOD, were studied by chronopotentiometry and voltammetry, MK-40MOD being obtained by covering the heterogeneous surface of a commercial MK-40 membrane with a homogeneous 20 µm thick Nafion® film. Electrodialysis process was realized in an electrodialysis flow-through laboratory cell, in which the cation-exchange membrane under study formed a desalination chamber with an auxiliary anion-exchange (Neosepta AMX-SB) membrane. 0.02 M and 0.04 M solutions of CaCl2, MgCl2 and NaCl were used. The current densities were changed in the range from 0.25 i lim t h to 2.5 i lim t h , where the theoretical limiting current density, i lim t h , was calculated using the Leveque equation. The potential drop over the modified MK-40MOD membrane and the water splitting at this membrane turned out to be lower in all studied cases. Formation of scaling was observed only in the case of the MK-40/0.04 M MgCl2 system at current densities in the range from 1.1 i lim t h to 1.4 i lim t h . For these current densities, the (quasi)steady state value of potential drop slowly increased with time and the crystals of Mg(OH)2 were found on the ion-exchange particles embedded onto the MK-40 membrane surface facing the desalination chamber. At higher currents, stronger electroconvection at this membrane and higher water splitting at the AMX-SB membrane (the latter providing lower pH in the desalination chamber) prevented scaling. No scaling was found on the modified membrane at any current. It is due to the Nafion® film, which is relatively more hydrophobic than pristine MK-40 and which provides a “better” distribution of current lines near the surface, thus enhancing electroconvection and decreasing water splitting.
L Dammak - One of the best experts on this subject based on the ideXlab platform.
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effect of homogenization and hydrophobization of a cation exchange membrane surface on its scaling in the presence of calcium and Magnesium Chlorides during electrodialysis
Journal of Membrane Science, 2017Co-Authors: M A Andreeva, N D Pismenskaya, V V Nikonenko, L Dammak, C Larchet, Daniel Grande, N A KononenkoAbstract:Abstract In this paper, two cation-exchange membranes, i.e. MK-40 and MK-40 MOD , were studied by chronopotentiometry and voltammetry, MK-40 MOD being obtained by covering the heterogeneous surface of a commercial MK-40 membrane with a homogeneous 20 µm thick Nafion ® film. Electrodialysis process was realized in an electrodialysis flow-through laboratory cell, in which the cation-exchange membrane under study formed a desalination chamber with an auxiliary anion-exchange (Neosepta AMX-SB) membrane. 0.02 M and 0.04 M solutions of CaCl 2 , MgCl 2 and NaCl were used. The current densities were changed in the range from 0.25 i lim t h to 2.5 i lim t h , where the theoretical limiting current density, i lim t h , was calculated using the Leveque equation. The potential drop over the modified MK-40 MOD membrane and the water splitting at this membrane turned out to be lower in all studied cases. Formation of scaling was observed only in the case of the MK-40/0.04 M MgCl 2 system at current densities in the range from 1.1 i lim t h to 1.4 i lim t h . For these current densities, the (quasi)steady state value of potential drop slowly increased with time and the crystals of Mg(OH) 2 were found on the ion-exchange particles embedded onto the MK-40 membrane surface facing the desalination chamber. At higher currents, stronger electroconvection at this membrane and higher water splitting at the AMX-SB membrane (the latter providing lower pH in the desalination chamber) prevented scaling. No scaling was found on the modified membrane at any current. It is due to the Nafion ® film, which is relatively more hydrophobic than pristine MK-40 and which provides a “better” distribution of current lines near the surface, thus enhancing electroconvection and decreasing water splitting.
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effect of homogenization and hydrophobization of a cation exchange membrane surface on its scaling in the presence of calcium and Magnesium Chlorides during electrodialysis
Journal of Membrane Science, 2017Co-Authors: M A Andreeva, N D Pismenskaya, V V Nikonenko, L Dammak, C Larchet, Daniel Grande, V V Gil, N A KononenkoAbstract:Abstract In this paper, two cation-exchange membranes, i.e. MK-40 and MK-40MOD, were studied by chronopotentiometry and voltammetry, MK-40MOD being obtained by covering the heterogeneous surface of a commercial MK-40 membrane with a homogeneous 20 µm thick Nafion® film. Electrodialysis process was realized in an electrodialysis flow-through laboratory cell, in which the cation-exchange membrane under study formed a desalination chamber with an auxiliary anion-exchange (Neosepta AMX-SB) membrane. 0.02 M and 0.04 M solutions of CaCl2, MgCl2 and NaCl were used. The current densities were changed in the range from 0.25 i lim t h to 2.5 i lim t h , where the theoretical limiting current density, i lim t h , was calculated using the Leveque equation. The potential drop over the modified MK-40MOD membrane and the water splitting at this membrane turned out to be lower in all studied cases. Formation of scaling was observed only in the case of the MK-40/0.04 M MgCl2 system at current densities in the range from 1.1 i lim t h to 1.4 i lim t h . For these current densities, the (quasi)steady state value of potential drop slowly increased with time and the crystals of Mg(OH)2 were found on the ion-exchange particles embedded onto the MK-40 membrane surface facing the desalination chamber. At higher currents, stronger electroconvection at this membrane and higher water splitting at the AMX-SB membrane (the latter providing lower pH in the desalination chamber) prevented scaling. No scaling was found on the modified membrane at any current. It is due to the Nafion® film, which is relatively more hydrophobic than pristine MK-40 and which provides a “better” distribution of current lines near the surface, thus enhancing electroconvection and decreasing water splitting.
