Anion Exchange Membranes,Thickness:170𝜇m

INQUIRY

Catalog Number	ACMA00033515
Application	·Acid recovery
Color Form	Off-White/Beige
Feature	High acid diffusion
Ionic Form	Cl-
Moisture Content	24%-30%
Notice For Use	·Soak in 5% NaCl solution for 24 hours for pretreatment ·Use under humid conditions to avoid dryness ·Avoid excessive bending, folding and close to sharp objects ·Store in 1-74% sodium chloride solution and avoid light ·Avoid use in solutions containing oils, oxidizing substances (concentrated nitric acid, perchloric acid, etc.) and ionic high molecular weight organic compounds (surfactants, etc.)
pH Range	0-8
Rupture Strength	≥0.25Mpa
Selectivity	90%-95%
Sheet Resistance	1𝛺·cm2
Size	We can provide special customized size according to your requirement
Specification	Single Sheet
Thermal Stability	<40°C
Thickness	170𝜇m
Type	Anion

Frontier Research

Integration of Anion Exchange Membrane-Based Diffusion Dialysis with Other Technologies for Acid Recovery

Zhang C, et al. Membranes, 2020, 10(8), 169.

Diffusion dialysis (DD) based on anion exchange membrane (AEM) is a low-energy, low-environmental-pollution technology driven by activity gradients that can be used to recover acids from acidic wastewater. AEM-based DD can also be combined with other technologies to overcome limitations and improve the efficiency of acid recovery.
· Combination of DD with pressure: Using pressure as an auxiliary to drive the migration of acid in the DD process can achieve higher acid concentrations on the receiving side and prevent water penetration.
· Combination of DD with electric field: Using electric field as an additional driving force can overcome the shortcomings of DD. For example, electrodialysis (ED) is integrated with DD to recover acid. The integration of ED and DD is used to recover HCl from simulated chemical synthesis aluminum foil wastewater, showing more effective HCl recovery performance than using DD alone, and can be reused.
· Combination of DD with continuous process: In practical applications, continuous dialyzers for acid recovery have the advantages of higher productivity, smaller dialysis equipment size, lower cost, and easier operation. For example, the Plate and Frame Diffusion Dialysis (PFDD) module can recover H2SO4 from acid leachate (containing metal ions such as V, Al and Fe ions) with a recovery rate of up to 84 wt.%.

Q&A

What are ion exchange membranes (IEM) composed of?

Ion exchange membranes are composed of ionic head groups attached to polymer matrices.

How can ion exchange membranes be classified?

Ion exchange membranes can be classified as anion exchange membranes (AEM) or cation exchange membranes (CEM) depending on the type of ion that is permitted to cross the membrane layer.

What type of ion are anion exchange membranes (AEM) permeable to?

Anion exchange membranes (AEM) are permeable to anions and repel cations.

What are the two types of anions that alkaline anion exchange membranes (AAEMs) can pass?

Alkaline anion exchange membranes (AAEMs) can pass alkaline form anions such as OH- and HCO3-.

What are some methods used to characterize anion exchange membranes (AEM)?

Methods such as microscopy (SEM) and spectroscopy (ERD, NMR, FTIR, SAXS) are used to characterize the molecular composition and structure of the membranes.

How is the ion exchange capacity (IEC) of a membrane measured?

The ion exchange capacity (IEC) is measured as the number of exchangeable ions per membrane dry weight (meqiv/g or mmol/g).

How is the swelling ratio (SR) of a membrane calculated?

The swelling ratio (SR) is calculated as a percentage difference between the wet and dry membrane lengths.

What does the water uptake (WU) of a membrane measure?

The water uptake (WU) measures the change in membrane mass when exposed to water.

How is the membrane water content (γ) calculated?

The membrane water content (γ) is calculated by dividing the water uptake by the molecular weight of water and the ion exchange capacity (IEC).

How is the alkaline stability of an anion exchange membrane (AEM) measured?

The alkaline stability is a measure of how the AEM performance changes over time when exposed to high-pH environments.

Technical Information

Diffusion Dialysis Technology Based on Anion Exchange Membrane

Diffusion dialysis technology (DD) based on anion exchange membrane (AEM) is considered an effective technology with low energy consumption and less environmental pollution for recovering acids and valuable metals from industrial wastewater.