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Modification of Sulfonated Polyethersulfone Membrane as a Selective Adsorbent for Co(II) Ions
Gadeer R Ashour1, Mahmoud A Hussein1,2, Tariq R Sobahi1
1Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
Polymers
|October 23, 2021
Summary
Sulfonated polyethersulfone (SPES) membranes were modified with cations to create selective adsorbents for detecting Co(II) ions. The amberlite-modified SPES (A-SPES) showed high adsorption capacity, making it effective for removing Co(II) from water.
Area of Science:
- Materials Science
- Environmental Chemistry
- Analytical Chemistry
Background:
- Ion-exchange membranes are crucial for water treatment and ion detection.
- Sulfonated polyethersulfone (SPES) offers a versatile platform for developing advanced materials.
- Efficient and selective adsorbents are needed for detecting and removing heavy metal ions like Cobalt(II) from aqueous solutions.
Purpose of the Study:
- To prepare and characterize novel SPES-based ion-exchange membranes.
- To evaluate the efficiency of these membranes as solid adsorbents for Co(II) ion detection.
- To investigate the adsorption capacity and selectivity of modified SPES membranes for Co(II) ions.
Main Methods:
- SPES membranes were synthesized and modified with various cations (Na+, NH4+, amberlite).
- Material characterization was performed using XRD, FT-IR, SEM, and TGA.
- Adsorption studies were conducted using ICP-OES, and adsorption isotherms were analyzed using the Langmuir model.
Main Results:
- FT-IR and XRD confirmed successful cation incorporation onto the SPES surface.
- TGA analysis indicated enhanced thermal stability, with NH4-SPES being the most stable.
- Amberlite-modified SPES (A-SPES) demonstrated high adsorption efficiency and capacity (90.13 mg/g) for Co(II) at pH 6.
Conclusions:
- Cation modification enhances the thermal stability and adsorption properties of SPES membranes.
- A-SPES is a highly effective and selective adsorbent for the quantitative determination and removal of Co(II) ions.
- The developed A-SPES membranes show significant potential for environmental monitoring and remediation applications.
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