| Title |
Selective leaching of indium from spent LCD screens by siderophore desferrioxamine E |
| ID_Doc |
19871 |
| Authors |
Zheng, K; Benedetti, MF; Jain, R; Guy, BM; Pollmann, K; van Hullebusch, ED |
| Title |
Selective leaching of indium from spent LCD screens by siderophore desferrioxamine E |
| Year |
2024 |
| Published |
|
| DOI |
10.1016/j.jhazmat.2024.134013 |
| Abstract |
Given the criticality of indium (In) in high-tech applications, spent LCD screens can represent a viable secondary In resource. In this work, an innovative and alternative technology to selectively leach In from spent LCD screens using a microbial chelating agent, desferrioxamine E (DFOE), was developed. Indium was concentrated from spent LCD screens by implementing an adapted pre-treatment procedure, allowing the isolation of an indium -rich glassy fraction. During leaching, the competition between aluminum (Al) and In for complexation with DFOE leads to the precipitation of In(OH) 3 at low DFOE concentrations (12 - 240 mu M). After adjusting the optimal conditions (fraction size: 0 - 36 mu M, pH: 5.5, S/L ratio: 1 g/L, 25 degrees C), the In leaching yield reached 32%, ten times higher than Al over 90 days with 5 mM DFOE. Thus, achieving high In recovery is possible through i) prolonging leaching durations, ii) selective leaching, and iii) minimizing Al interference. This is the first attempt to selectively leach In using a selected siderophore from end -of -life products with high concentrations of non -targeted elements (i.e. Al, Si, and Ca). This study demonstrates the potential of generating indium -rich leachates, which can be subsequently processed through the GaLIophore technology for In refining. |
| Author Keywords |
Waste liquid crystal displays; Selective leaching; Optimal conditions; Competition; Modeling |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:001218317600001 |
| WoS Category |
Engineering, Environmental; Environmental Sciences |
| Research Area |
Engineering; Environmental Sciences & Ecology |
| PDF |
https://doi.org/10.1016/j.jhazmat.2024.134013
|