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Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device

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Published on: July 20, 2021

Pharmaceutical removal at low energy consumption using membrane capacitive deionization.

Moon Son¹, Kwanho Jeong¹, Nakyung Yoon¹

¹School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology, UNIST-gil 50, Ulsan, 44919, Republic of Korea.

|March 10, 2021

Summary

Membrane capacitive deionization (MCDI) effectively removes pharmaceuticals like atenolol and sulfamethoxazole. However, pharmaceutical adsorption significantly reduces MCDI performance and energy demand over multiple cycles.

Keywords:

Membrane capacitive deionization Pharmaceutical Removal Salt adsorption capacity Specific energy consumption

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Published on: February 23, 2017

Area of Science:

Environmental Science
Water Treatment Technologies
Electrochemistry

Background:

Pharmaceuticals in water pose environmental and health risks.
Membrane capacitive deionization (MCDI) is a promising technology for water purification.

Purpose of the Study:

To evaluate MCDI performance in removing diverse pharmaceuticals.
To assess the impact of pharmaceutical adsorption on MCDI efficiency and energy consumption.

Main Methods:

Batch experiments using MCDI with acetaminophen, atenolol, and sulfamethoxazole.
Analysis of removal rates, salt adsorption capacity, specific capacity, and energy factors over ten cycles.

Main Results:

High removal rates for cationic atenolol (97.65%) and anionic sulfamethoxazole (93.22%).
Neutral acetaminophen removal was lower (68.08%).
Significant decrease in adsorption capacity and specific capacity due to pharmaceutical adsorption, shortening cycle times and reducing energy consumption.

Conclusions:

MCDI demonstrates efficient pharmaceutical removal with low energy demand.
Pharmaceutical presence drastically alters MCDI performance and capacity over repeated cycles.