Recent advances in smart integrated membrane assisted liquid extraction technology

Pabby, Anil Kumar; Swain, Biswajit; Sastre, Ana Marı́a

doi:10.1016/j.cep.2017.06.006

Cited by 23 publications

(10 citation statements)

References 135 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table 2 summarizes previous works focused on the zinc recovery from SPAs at laboratory scale using SX and membrane-based solvent extraction (MBSX), including the innovative NDSX and emulsion pertraction (EPT) configurations, which are performed in hollow fiber membrane contactors (HFMC) [32]. HFMCs permit the non-dispersive extraction of metals by using the porous membrane to stabilize the aqueous-organic interface [44][45][46][47]. EPT and NDSX differ in the way of contacting the fluid phases and the number of contactors [48].…”

Section: Znmentioning

confidence: 99%

See 1 more Smart Citation

Scale-Up of Membrane-Based Zinc Recovery from Spent Pickling Acids of Hot-Dip Galvanizing

et al. 2020

View full text Add to dashboard Cite

Zinc recovery from spent pickling acids (SPAs) can play an important role in achieving a circular economy in the galvanizing industry. This work evaluates the scale-up of membrane-based solvent extraction technology aimed at the selective separation of zinc from industrial SPAs as a purification step prior to zinc electrowinning (EW). The experiments were carried out at a pilot scale treating SPAs batches of 57 to 91 L in a non-dispersive solvent extraction (NDSX) configuration that simultaneously performed the extraction and backextraction steps. The pilot plant was equipped with four hollow fiber contactors and 80 m2 of total membrane area, which was approximately 30 times higher than previous bench-scale studies. Tributylphosphate diluted in Shellsol D70 and tap water were used as organic and stripping agents, respectively. Starting with SPAs with high Zn (71.7 ± 4.3 g·L−1) and Fe (82.9 ± 5.0 g·L−1) content, the NDSX process achieved a stripping phase with 55.7 g Zn·L−1 and only 3.2 g Fe·L−1. Other minor metals were not transferred, providing the purified zinc stripping with better quality for the next EW step. A series of five consecutive pilot-scale experiments showed the reproducibility of results, which is an indicator of the stability of the organic extractant and its adequate regeneration in the NDSX operation. Zinc mass transfer fluxes were successfully correlated to zinc concentration in the feed SPA phase, together with data extracted from previous laboratory-scale experiments, allowing us to obtain the design parameter that will enable the leap to the industrial scale. Therefore, the results herein presented demonstrate the NDSX technology in an industrially relevant environment equivalent to TRL 6, which is an essential progress to increase zinc metal resources in the galvanizing sector.

show abstract

Section: Znmentioning

confidence: 99%

“…HFMCs permit the non-dispersive extraction of metals by using the porous membrane to stabilize the aqueous–organic interface [ 44 , 45 , 46 , 47 ]. EPT and NDSX differ in the way of contacting the fluid phases and the number of contactors [ 48 ].…”

Section: Introductionmentioning

confidence: 99%

Scale-Up of Membrane-Based Zinc Recovery from Spent Pickling Acids of Hot-Dip Galvanizing

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Liquid layer between the immobilized interfaces acts as a selective barrier which is responsible for solute transport. This technique has its own limitations due to low inventory of the membrane phase (in case planned for large concentration of solute), and issues related to membrane instability [7,9,[11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modeling of Extraction of Neodymium using Pseudo-emulsion based Hollow Fiber Strip Dispersion (PEHFSD)

Mishra¹,

Swain²,

Pabby³

et al. 2021

AMST

Self Cite

View full text Add to dashboard Cite

Pseudo-emulsion based hollow fiber strip dispersion (PEHFSD) is a promising alternative technique due to its stability, simplicity and cost of operation. This is an efficient process due to its high surface area for extraction as well as stripping, and low energy consumption for creating the pseudo-emulsion and for the separation of phases. This technique takes the combine advantages of emulsion liquid membrane and overcomes the sufferings of membrane stability in the supported liquid membrane systems. Present work includes extraction of neodymium (III) (Nd) by using TODGA and HNO3 as the extractant cum strippant in PEHFSD technique. A model is developed to study the transport of Nd under different hydrodynamic and chemical conditions that includes organic ratio (A/O) in dispersion, effect of speed of impeller on drop size formation, effect of feed acidity, effect of carrier concentration, effect of feed flow rate. A code is written to solve the model equations numerically to predict the concentration of the feed reservoir with time. Experiments are conducted to obtain the best optimum extraction conditions. Results obtained from the numerical simulations are validated with the experimental data and found a good agreement between them.

show abstract

“…While not as efficient as hollow-fiber membrane modules, FS-SLM modules are simple to fabricate and can be designed to meet separation requirements. The efficacy of both hollow-fiber and flat sheet SLM geometries has been demonstrated for large, i.e., tens of milliliters or more, volume radionuclide separations in papers by Danesi et al, Chaudry et al, Shukla et al, and others as described in the comprehensive reviews by de Gyves et al and Pabby et al ,,− However, flow-through microfluidic SLM modules have primarily been demonstrated for use in small-volume separations of organic molecules or stable metal ions in biological and environmental samples − and never, to the best of our knowledge, for the separation of radionuclides.…”

Section: Introductionmentioning

confidence: 99%

3D Printed Microfluidic Supported Liquid Membrane Module for Radionuclide Separations

Servis

Parsons‐Davis

Moody

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Microfluidic supported liquid membrane extraction is a promising technique for microliter-scale radionuclide separations because it requires very small reagent volumes and combines extraction and stripping in a single unit operation. Flat sheet supported liquid membrane (FS-SLM) modules with 100, 200, 300, and 400 μm deep channels were fabricated at a cost of less than 5 USD in material using a commercially available resin three-dimensional (3D) printer. The performance of these modules was characterized by quantifying uranium transport across a 15 v/v % tributyl phosphate (TBP) liquid membrane at flow rates between 5 and 60 μL min −1 and developing a two-dimensional (2D) numerical transport model for the system. The extent of uranium extraction was found to increase with increasing residence time and decreasing channel depth, with quantitative extraction occurring at the slowest flow rates and shallowest channel depths. The numerical model agreed well with the experimental extraction results. Time-dependent calculations showed that the modules reach steady state in fewer than 9 min and that there is a considerable buildup of uranium in the membrane during that time.

show abstract

Recent advances in smart integrated membrane assisted liquid extraction technology

Cited by 23 publications

References 135 publications

Scale-Up of Membrane-Based Zinc Recovery from Spent Pickling Acids of Hot-Dip Galvanizing

Scale-Up of Membrane-Based Zinc Recovery from Spent Pickling Acids of Hot-Dip Galvanizing

Mathematical Modeling of Extraction of Neodymium using Pseudo-emulsion based Hollow Fiber Strip Dispersion (PEHFSD)

3D Printed Microfluidic Supported Liquid Membrane Module for Radionuclide Separations

Contact Info

Product

Resources

About