The residual brine can also go through treatment and packaged as...

The residual brine can also go through treatment and packaged as bottled water and sold.

but I think LKE should be in talk with Argentina Govt and environmental groups and scientists as to what's the right way, as injecting it back to ground may dilute existing brine. and lower the efficiency of lithium extraction.

unless it is injected at different place and at different levels.
but risk will lie.

then again this is something which all DLE companies are going to face. So a solution will need to be agreed

- residual pumped to some water treatment plant and routed to households
- residual treated locally and bottled and sold, or donated to third world countries
- residual treated and dumped in some nearby river or canal.