|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Rare Metal Extraction & Processing
||Recovering Lithium using Graphene Oxide Membranes
||Tobias Foller, Rakesh Joshi
|On-Site Speaker (Planned)
Graphene Oxide (GO) membranes consist of multiple stacked, one atom thick functionalized graphene sheets. Its unique assembly allows water to pass through the interlayer spaces of the stacks in a tortuous pathway. The distance of the interlayer space governs, which molecule can pass through by size exclusion mechanism. Therefore, GO membranes show a sharp molecular cut-off as an ion sieve in water purification. Here, we present a novel strategy that allows us to recover lithium from a saline solution. For that, we fine-tune the GO membranes and extending its selection mechanism beyond size-exclusion. Hence, the membranes block small ions like sodium while lithium can penetrate the membrane. This work gives a new perspective on how GO membranes might be used in recovering the so-far wasted lithium from brine in desalination plants.