Effect of ion exchange dialysis process variables on aluminium permeation using response surface methodology

Asante-Sackey, Dennis; Rathilal, Sudesh; Pillay, Visvanathan L.; Tetteh, Emmanuel Kweinor

doi:10.4491/eer.2019.297

Cited by 8 publications

(12 citation statements)

References 48 publications

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“…Unlike the synergetic effect of feed concentration in the simplified model developed in the previous work at 24 hrs [43], the feed concentration in the actual model for 32 hrs contributed antagonistically to the Al-recovery. Furthermore, while the quadratic term of sweep concentration was significant at 32 hrs, vice versa was observed at 24 hrs.…”

Section: Regression Models and Statistical Testingmentioning

confidence: 71%

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Ion Exchange Dialysis for Aluminium Transport through a Face Centered Central Composite Design Approach

Asante-Sackey¹,

Rathilal²,

Pillay³

et al. 2019

Preprint

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An ion exchange dialysis (IED) is used in the recovery of aluminium from residue. In this papers, the face-centered central composite design (FC-CCD) of the response surface methodology (RSM) and desirability approach is used for experimental design, modelling and process optimization of a counter flow IED system. The feed concentration, feed flowrate, sweep flowrate and sweep concentration are selected as the process variables, with the Al-transport across a Nafion 117 membrane as the target response. A total of 30 experimental runs were conducted with 6 center points. The response obtained was analysed by analysis of variance (ANOVA) and fitted to a second-order polynomial model using multiple regression analysis. The actual R 2 and standard deviation of the model are 0.9548 and 0.2932 respectively. The influences of significant variables are plotted on 3D surface and contour plots. The designed variables were numerically optimized by applying the desirability function to achieve the maximum Al-transport. The optimised condition values were found to be feed concentration (1600 ppm), feed flowrate (61.76%), sweep flowrate (37.50%) and sweep concentration (0.75 N) for the 80% target response at 32hrs. Overall, the model can be used to effectively predict Al-recovery using the designed system.

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Section: Regression Models and Statistical Testingmentioning

confidence: 71%

“…Samples collected from the two phases were diluted (5-100 times) with 1% wt HNO3 to volume. The total loss of feed and sweep solution due to sampling was between 3% and 4% of the total volume [43].…”

Section: Analyticalmentioning

confidence: 99%

Ion Exchange Dialysis for Aluminium Transport through a Face Centered Central Composite Design Approach

Asante-Sackey¹,

Rathilal²,

Pillay³

et al. 2019

Preprint

Self Cite

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“…The feed and sweep electrolyte solutions were prepared as provided in Table 1 and homogeneity was ensured during the experiment with the aid of magnetic stirrers. Previous work done by the authors expounds on the choice of the ranges for the variables of concern [41]. All experiments were performed in an air-thermostated room between 22 and 25 • C. The data obtained was evaluated in terms of Al transport (%) from the feed solution as follows:…”

Section: Ion Exchange Dialysis Set-upmentioning

confidence: 99%

“…Samples collected from the two phases were diluted (5-100 times) with 1 wt% HNO 3 to volume. The total loss of the feed and sweep solution due to sampling was between 3% and 4% of the total volume [41].…”

Section: Analyticalmentioning

confidence: 99%

“…With an industrial concept mind, Asante-Sackey et al [41] designed a counter-flow IED system to study aluminium permeation across a Nafion 117 membrane using a statistical order. In this present work, the multivariable interactive effect of feed concentration, feed flowrate, sweep concentration and sweep flowrate on Al permeation using the face-centred central composite design (FC-CCD) approach is reported.…”

Section: Introductionmentioning

confidence: 99%

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Ion Exchange Dialysis for Aluminium Transport through a Face-Centred Central Composite Design Approach

et al. 2020

Self Cite

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An ion exchange dialysis (IED) is used in the recovery of aluminium from residue. In this paper, the face-centred central composite design (FC-CCD) of the response surface methodology (RSM) and desirability approach is used for experimental design, modelling and process optimization of a counter flow IED system. The feed concentration, feed flowrate, sweep flowrate and sweep concentration were selected as the process variables, with the Al transport across a Nafion 117 membrane as the target response. A total of 30 experimental runs were conducted with six centre points. The response obtained was analysed by analysis of variance (ANOVA) and fitted to a second-order polynomial model using multiple regression analysis. The actual R2 and standard deviation of the model are 0.9548 and 0.2932, respectively. Depending on the time zone of reference (24 h or 32 h), the highest enrichment of >1.50 was achieved. The designed variables were numerically optimized by applying the desirability function to achieve the maximum Al transport. The optimised condition values were found to be a feed concentration of 1600 ppm, feed flowrate of 61.76%, sweep flowrate of 37.50% and sweep concentration of 0.75 N for the 80% target response at 32 h. Overall, the model can be used to effectively predict Al recovery using the designed system.

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Research on a RSM Based Parameter Optimization Method and Its Application in Mandible Reconstruction Implant

Shao

Liú

et al. 2022

Advances in Mechanical Design

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Effect of ion exchange dialysis process variables on aluminium permeation using response surface methodology

Cited by 8 publications

References 48 publications

Ion Exchange Dialysis for Aluminium Transport through a Face Centered Central Composite Design Approach

Ion Exchange Dialysis for Aluminium Transport through a Face Centered Central Composite Design Approach

Ion Exchange Dialysis for Aluminium Transport through a Face-Centred Central Composite Design Approach

Research on a RSM Based Parameter Optimization Method and Its Application in Mandible Reconstruction Implant

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