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Detergent Purification of Membrane Proteins

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Detergents are used to purify the integral proteins of the membrane. The hydrophobic portion of the detergent can replace membrane phospholipids while solubilizing the membrane proteins. When detergent monomers reach a specific concentration in a solution called critical micelle concentration (CMC), they form micelles. Above CMC, the concentration of the detergent monomers remains in equilibrium with the micelle. The number of detergent monomers present in the CMC varies for each detergent, and...

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Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone

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Published on: February 23, 2017

A Janus membrane with electro-induced multi-affinity interfaces for high-efficiency water purification.

Lie Liu¹, Huachun Lan¹, Yuqi Cui¹

¹Center for Water and Ecology, School of Environment, Tsinghua University, Beijing 100084, China.

Science Advances

|May 24, 2024

Summary

This study introduces a novel Janus membrane for efficient water purification, removing micropollutants like organics and heavy metals with high efficiency and low energy use. The membrane

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Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Published on: April 7, 2017

Area of Science:

Environmental Science
Materials Science
Chemical Engineering

Background:

Micropollutant contamination in drinking water is a global environmental issue.
Membrane separation is effective but struggles with simultaneous removal of diverse contaminants.
Existing membranes lack the permselectivity for efficient treatment of small-molecule and ionic pollutants.

Purpose of the Study:

To develop a high-efficiency water purification method using a novel membrane.
To address the limitations of current membranes in treating mixed contaminants.
To achieve simultaneous removal of diverse micropollutants with high efficiency and low energy consumption.

Main Methods:

Fabrication of a low-pressure Janus membrane with electro-induced multi-affinity.
Utilizing hydrophobic and electrostatic interactions for contaminant binding.
Single-pass filtration to separate organics and heavy metals.

Main Results:

Achieved approximately 100% removal efficiency for diverse organics and heavy metals.
Demonstrated high water flux (>680 L m⁻² h⁻¹).
Reduced energy consumption by 98% compared to commercial nanofiltration membranes.
Enabled 100% regeneration of membrane performance via electro-induced switching.

Conclusions:

The proposed Janus membrane offers a high-efficiency, low-energy solution for simultaneous micropollutant removal.
Electro-induced switching of interfacial affinity allows for complete membrane regeneration.
This technology presents a sustainable approach to drinking water purification.