Tubular membrane used in continuous and semi-continuous diffusion dialysis

Ye, Hongcheng; Zou, Lingfei; Wu, Cuiming; Wu, Yonghui

doi:10.1016/j.seppur.2019.116147

Cited by 8 publications

(6 citation statements)

References 24 publications

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“…Compared to the PFDD module, the SWDD module exhibited a relatively high acid recovery ratio (84.3 wt.%), low Al ion leakage ratio (less than 4 wt.%) and a similar time to reach equilibrium (3 h). However, the SWDD module is difficult to disassemble, check and replace due to the sealing of the two sides of the AEM with glue to prevent the leakage of the solution [ 129 ].…”

Section: The Integration Of Diffusion Dialysis With Other Technolomentioning

confidence: 99%

“…Considering that the hollow-fiber-type dialyzers are more effective than the PFDD and SWDD modules, the hollow-fiber AEM could have broad applications. In Ye’s work [ 129 ], a PVA-based tubular membrane was prepared to recover HCl in semicontinuous ( Figure 11 ). The semicontinuous process was performed by immersing the membrane into the static matrix solution (water) and flowing the feed solution through the membrane.…”

Section: The Integration Of Diffusion Dialysis With Other Technolomentioning

confidence: 99%

“…Figure11. The schematic diagram for the static semi-continuous process using the PVA-based tubular membrane ("Resi" means residual liquor)[129].…”

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confidence: 99%

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Diffusion Dialysis for Acid Recovery from Acidic Waste Solutions: Anion Exchange Membranes and Technology Integration

Zhang

Wang

2020

Membranes

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Inorganic acids are commonly used in mining, metallurgical, metal-processing, and nuclear-fuel-reprocessing industries in various processes, such as leaching, etching, electroplating, and metal-refining. Large amounts of spent acidic liquids containing toxic metal ion complexes are produced during these operations, which pose a serious hazard to the living and non-living environment. Developing economic and eco-friendly regeneration approaches to recover acid and valuable metals from these industrial effluents has focused the interest of the research community. Diffusion dialysis (DD) using anion exchange membranes (AEMs) driven by an activity gradient is considered an effective technology with a low energy consumption and little environmental contamination. In addition, the properties of AEMs have an important effect on the DD process. Hence, this paper gives a critical review of the properties of AEMs, including their acid permeability, membrane stability, and acid selectivity during the DD process for acid recovery. Furthermore, the DD processes using AEMs integrated with various technologies, such as pressure, an electric field, or continuous operation are discussed to enhance its potential for industrial applications. Finally, some directions are provided for the further development of AEMs in DD for acid recovery from acidic waste solutions.

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Section: The Integration Of Diffusion Dialysis With Other Technolomentioning

confidence: 99%

Section: The Integration Of Diffusion Dialysis With Other Technolomentioning

confidence: 99%

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Diffusion Dialysis for Acid Recovery from Acidic Waste Solutions: Anion Exchange Membranes and Technology Integration

Zhang

Wang

2020

Membranes

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“…The key element of a diffusion-dialysis based acid-recovery system is an anion-exchange membrane, which has a high acid permeability and can retain metal cations [ 5 ]. In recent years, the synthesis of new membranes and the modification of known materials are the main directions in the development of DD [ 6 , 7 , 8 , 9 ], together with module structure optimization [ 10 , 11 ] and researching new applications [ 12 , 13 , 14 , 15 ]. Currently, “plate-and-frame” is the most commonly used membrane module geometry; however, the space-saving characteristics and modular nature of spiral-wound DD membrane modules have attracted much attention [ 4 , 11 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Recovery of Hydrochloric Acid from Industrial Wastewater by Diffusion Dialysis Using a Spiral-Wound Module

Merkel

Čopák

Голубенко

et al. 2022

IJMS

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In the present study, the possibility of using a spiral-wound diffusion dialysis module was studied for the separation of hydrochloric acid and Zn2+, Ni2+, Cr3+, and Fe2+ salts. Diffusion dialysis recovered 68% of free HCl from the spent pickling solution contaminated with heavy-metal-ion salts. A higher volumetric flowrate of the stripping medium recovered a more significant portion of free acid, namely, 77%. Transition metals (Fe, Ni, Cr) apart from Zn were rejected by >85%. Low retention of Zn (35%) relates to the diffusion of negatively charged chloro complexes through the anion-exchange membrane. The mechanical and transport properties of dialysis FAD-PET membrane under accelerated degradation conditions was investigated. Long-term tests coupled with the economic study have verified that diffusion dialysis is a suitable method for the treatment of spent acids, the salts of which are well soluble in water. Calculations predict significant annual OPEX savings, approximately up to 58%, favouring diffusion dialysis for implementation into wastewater management.

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“…Owing to the positively charged polymer matrix surrounding the pores, diffusion of cations, such as Fe 2+ , Fe 3+ , Cu 2+ or Pb 2+ slows down in the AEM-matrix, making it possible to achieve higher selectivity coefficients [6]. In recent years, development of DD has focused on the synthesis of new membranes and modifications to known materials [12][13][14][15], optimization of module structure [16,17], expanding known applications and researching potential new applications [17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Recovery of Spent Sulphuric Acid by Diffusion Dialysis Using a Spiral Wound Module

Merkel

Čopák

Dvořák

et al. 2021

IJMS

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In this study, we assess the effects of volumetric flow and feed temperature on the performance of a spiral-wound module for the recovery of free acid using diffusion dialysis. Performance was evaluated using a set of equations based on mass balance under steady-state conditions that describe the free acid yield, rejection factors of metal ions and stream purity, along with chemical analysis of the outlet streams. The results indicated that an increase in the volumetric flow rate of water increased free acid yield from 88% to 93%, but decreased Cu2+ and Fe2+ ion rejection from 95% to 90% and 91% to 86%, respectively. Increasing feed temperature up to 40 °C resulted in an increase in acid flux of 9%, and a reduction in Cu2+ and Fe2+ ion rejection by 2–3%. Following diffusion dialysis, the only evidence of membrane degradation was a slight drop in permselectivity and an increase in diffusion acid and salt permeability. Results obtained from the laboratory tests used in a basic economic study showed that the payback time of the membrane-based regeneration unit is approximately one year.

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Tubular membrane used in continuous and semi-continuous diffusion dialysis

Cited by 8 publications

References 24 publications

Diffusion Dialysis for Acid Recovery from Acidic Waste Solutions: Anion Exchange Membranes and Technology Integration

Diffusion Dialysis for Acid Recovery from Acidic Waste Solutions: Anion Exchange Membranes and Technology Integration

Recovery of Hydrochloric Acid from Industrial Wastewater by Diffusion Dialysis Using a Spiral-Wound Module

Recovery of Spent Sulphuric Acid by Diffusion Dialysis Using a Spiral Wound Module

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