Novel Polymer Sorbents with Imprinted Task-Specific Ionic Liquids for Metal Removal

Area of Science:

• Materials Science
• Environmental Chemistry
• Polymer Chemistry

Background:

• Heavy metal contamination in aqueous solutions poses significant environmental and health risks.
• Development of efficient and reusable sorbent materials is crucial for effective water purification.

Purpose of the Study:

• To investigate the potential of novel polymer sorbents functionalized with imprinted IL-groups for the removal of Cu(II), Cd(II), and Zn(II).
• To characterize the synthesized sorbents and optimize metal ion removal efficiency based on various operational parameters.

Main Methods:

• Synthesis of polymer matrices (poly(vinylbenzyl chloride-divinylbenzene) and poly(vinylbenzyl bromide-divinylbenzene)) functionalized with pyridyl undecanone derivatives.
• Characterization using FT-IR, Raman, TG, DSC, SEM, contact-angle goniometry, XPS, and Zeta potential analysis.
• Batch mode experiments to study the removal of Cd(II), Cu(II), and Zn(II) under varying pH, temperature, concentration, and time.

Main Results:

• The functionalized polymer sorbents exhibited high efficiency in removing Cu(II), Cd(II), and Zn(II) from aqueous solutions.
• Sorbents demonstrated fast kinetics and significant adsorption capacities at 25 °C (e.g., 84 mg/g for Zn(II)).
• Adsorption capacity increased with temperature, showing a 100% increase at 45 °C, and the sorbents were regenerable without significant loss of efficiency.

Conclusions:

• Novel polymer sorbents with imprinted IL-functional groups show great promise for heavy metal removal from wastewater.
• Sorbent performance is dependent on the functional group structure, with optimized materials offering efficient and sustainable metal remediation.
• The developed materials are stable, reusable, and effective under various conditions, highlighting their potential for practical applications.