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Functionalized Biopolymer for Enhanced Pt(IV) Recovery from Aqueous Solutions.
Theodora Babău1, Mihaela Ciopec1, Giannin Mosoarca1
1Faculty of Chemical Engineering, Biotechnologies and Environmental Protection, Politehnica University Timisoara, Victoriei Square, no. 2, 300006 Timisoara, Romania.
Polymers
|May 14, 2025
Summary
Chitosan functionalized with serine (Chi-Ser) effectively recovers platinum(IV) from water. This novel adsorbent demonstrates high capacity and reusability, offering a sustainable solution for precious metal recovery.
Area of Science:
- Materials Science
- Environmental Chemistry
- Chemical Engineering
Background:
- Platinum(IV) recovery from aqueous solutions is crucial for resource sustainability.
- Chitosan is a biocompatible polymer with potential for metal adsorption.
- Functionalization of chitosan can enhance its adsorption properties.
Purpose of the Study:
- To synthesize and characterize chitosan functionalized with serine (Chi-Ser) for Pt(IV) adsorption.
- To investigate the adsorption mechanism and optimize conditions for Pt(IV) recovery.
- To evaluate the reusability of the synthesized adsorbent.
Main Methods:
- Synthesis of chitosan-serine (Chi-Ser) adsorbent.
- Characterization using SEM, FT-IR, and EDX analyses.
- Batch adsorption experiments under static and dynamic conditions.
- Isotherm (Sips) and kinetic (Clark) modeling.
- Taguchi method for optimization.
- Adsorption-desorption cycle testing.
Main Results:
- Chi-Ser adsorbent was successfully synthesized and characterized.
- Maximum Pt(IV) adsorption capacity of 7.23 mg/g was achieved at pH > 4.
- Sips isotherm and Clark equation best described the adsorption process.
- Adsorbent showed good reusability over multiple cycles.
Conclusions:
- Chi-Ser is a promising adsorbent for efficient Pt(IV) recovery from aqueous solutions.
- The study provides optimized conditions for practical application.
- The adsorbent's reusability highlights its economic and environmental viability.
