Structurally and Chemically modified PAN-Based Fibrous Adsorbents for Precious Metal Recovery from Seawater
발표자
김영웅 (충남대학교)
연구책임자
이택승 (충남대학교)
초록
내용
Polyacrylonitrile (PAN)-based fibrous adsorbents were fabricated and evaluated. These include PAN staple fibers, nonwoven mats, nanofibers, porous nanofibers, and zeolite imidazole framwork (ZIF) incorporated nanofibers. Amidoxime groups were introduced through post-treatment with hydroxylamine to provide selective binding affinity for metal ions. The nanofibrous and porous structure offers advantages such as a high surface area, tunable porosity, and rapid ion diffusion pathways, enabling enhanced adsorption properties. ZIF further improves selectivity and chemical affinity in saline environments. All fabricated adsorbents were tested in both batch systems and real seawater to evaluate their uptake performance. Adsorption kinetics and isotherm models were applied to analyze the adsorption behavior of each type of adsorbent. This study demonstrates the potential of structural control for designing high-performance fibrous adsorbents for marine precious metal recovery.