Task 5 FAQs

Please contact us to let us know you’re working on the taskWe will contact you right away with any breaking news.

Announcement: Teams need to submit three 100-mL samples of their treated water for testing(the original task stated the amount as one 100 mL)

Task 5: Produced Water: Rare-Earth Element Recovery and Clean Water Production

Q1: What is the mixing method for the synthetic produced water? We are having issues with salts precipitating out of solution.

A1: (Posted on 3/4/2020) We have not yet actually attempted to create the sample solution for task 5 because we only late last week were able to acquire all of the chemicals that are to be mixed into the water (it took us a while to get europium chloride).  The composition shown for the produced water comes from the task sponsor.  As it turns out, I plan to make a sample of this solution tomorrow morning (Wednesday), and I can let you know how it goes.  Do note that solubilities can be affected by temperature, with some solubilities increasing as temperature is decreased.  In any event, I’ll be in touch again with you soon.

Q2: Is there a time limit on how long we can run our experiment?

A2: You may start running your experiment as soon as you are issued an on-site safety permit. The run-time may go until the sample is taken (1:30 PM on Tuesday).

We begin issuing permits around 7:00 pm on Sunday evening, after the Safety meeting and finish for the evening at 8:15 PM. We continue issuing the permits on Monday between 8 am and noon. Priority is first given to teams that have their ESPs approved prior to arrival at the contest, and next, to teams in the order in which they sign up (your team will sign up for a permit inspection when your bench-scale is completely set up).


Q3. Is there a requirement for all 5 gallons to be run through the column before taking the sample?

A3: No. We do not anticipate that your team will need all 18 liters of synthetic solution. We provide more than enough to ensure that you do not need to come ask for more while you are running your bench-scale demonstration.


Please check back regularly.


In the News–Articles related to Task 5

America’s Reliance on Mineral Imports