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Homework Help: Method to remove salt from water (Not distillation or RO)

  1. Nov 16, 2011 #1
    Hello all.

    I'm tutoring a high school student and am having trouble with a seemingly simple science project that was assigned: How to remove table salt from water. Having graduated as a Chemical Engineer, I said distillation! But the problem statement says you can't be that boring. Then I said reverse osmosis, thinking that would make for a great presentation (lots of good calculations to do and theory to discuss)... until I found the student has to actually perform the desalination process for the class. And RO units aren't that easy to build or operate with household materials.

    So know I don't really know. I'm thinking some kind of liquid-liquid extraction or forced precipitation of the NaCl.

    Any other "at home" desalination methods you can think of? Thanks!
     
    Last edited: Nov 16, 2011
  2. jcsd
  3. Nov 17, 2011 #2

    Borek

    User Avatar

    Staff: Mentor

    Ion-exchange resin?
     
  4. Nov 17, 2011 #3
    IX Resin is a cool idea.

    I don't suppose it's possible to do a "homemade" resin, so in that case from where would be a good place to purchase some that can exchange typical Na and Cl ions? (hopefully not to expensive!)

    Thanks.
     
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