| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Rare Metal Extraction & Processing
|
| Presentation Title |
Di-phenols Functionalized Chitosan as Selective Adsorbents for Extraction of Germanium |
| Author(s) |
Madhav Patel, Athanasios Karamalidis |
| On-Site Speaker (Planned) |
Madhav Patel |
| Abstract Scope |
In the current study, catechol functionalized chitosan, C-Cat, was investigated for selective solid-phase extraction of germanium. Germanium is one of the critical elements because of its growing demand, supply risk, and inefficient production. The current Ge production processes, such as chlorination-distillation and solvent extraction, suffer from high energy requirements, high chemical consumptions, impurities co-extractions, and waste stream generations. The adsorbent was synthesized via Schiff's base reaction. The adsorbent morphology was different from the chitosan due to surface modification. C-Cat adsorbed Ge selectively in the presence of competitive ions with Kd values of 10832.0 mL/g at pH 3 and 7417.6 mL/g at pH 4. The selectivity for Ge was also observed in Ge-spiked coal fly ash leachate. The distribution coefficients were correlated with metal hydrolysis constants, and linear free energy relationships were developed for C-Cat. These LFERs can be used to predict the selectivity of C-Cat using the metal hydrolysis constants. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Hydrometallurgy, Surface Modification and Coatings, Other |