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Postdoctoral Appointee: Hydrometallurgy
Posted Sep 24, 2026 · We last checked this listing on Oct 6, 2026
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Likely interview questions for this role
Written from this job description, not a generic list. Each one notes what the interviewer is really checking.
About your past
Tell me about a materials recovery system you built or operated. What went wrong and how did you fix it?
What they are checking: Whether they have hands-on experience building and running recovery systems.
How do you take detailed observations during an experiment so the data is useful later?
What they are checking: Whether they keep careful records, which the posting specifically calls out.
Tell me about a proposal or report you helped write. What was your part?
What they are checking: Whether they can contribute to proposals and reports, which help fund future work.
What would you do
Your process recovers the target metal well but also pulls in an impurity. What would you try?
What they are checking: Whether they can think about selectivity problems from chemistry and process angles.
How would you work with an industry partner who wants faster results than your data supports?
What they are checking: Whether they can communicate honestly with partners while keeping the work credible.
About the work
How would you set up a continuous hydrometallurgical process for recovering critical materials from an unconventional source?
What they are checking: Whether they can think beyond batch experiments to continuous processing, the focus of this role.
What challenges come with slurry-based processing, and how would you handle them?
What they are checking: Whether they understand solids handling, settling, viscosity and mass transfer in slurries.
How would you study material transport and reaction behavior during leaching?
What they are checking: Whether they can design experiments to understand kinetics and transport, not just measure yield.
What makes a feedstock unconventional, and how does that change your process design?
What they are checking: Whether they can adapt to variable, low-grade or waste feedstocks.
What role do heating and conversion steps play before leaching, and how would you study them?
What they are checking: Whether they understand pretreatment steps like roasting and how they affect recovery.
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Practice this out loudThe full job description
As published by Argonne National Laboratory.