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Science Forum

Science Forum

  1. Standard member sonhouse
    Fast and Curious
    29 Nov '17 12:52
    Quite a mouthful It is an easily manufactured complex that removes lead, mercury, flourides, cadmium and such from water when made to a filter.

    https://phys.org/news/2017-11-easily-compound-fluoride-metal-ions.html
  2. Subscriber moonbus
    Uber-Nerd
    01 Dec '17 13:56
    Yes, it's great to get clean water out of polluted water, but we still have dispose of the heavy metals somewhere safe.
  3. Subscriber ogb
    02 Dec '17 14:03
    it's OK to pollute ..as long as there is money to be made, To hell with the EPA..
  4. Standard member sonhouse
    Fast and Curious
    05 Dec '17 17:23
    Originally posted by @moonbus
    Yes, it's great to get clean water out of polluted water, but we still have dispose of the heavy metals somewhere safe.
    Well, it's a lot better for those poisons to be out of the water. The levels are seldom past the part per million in the water but some metals that is enough to cause damage so there wouldn't be all that much left, besides it would be in higher contaminated water after the filtration I assume. Heck, maybe they could make a secondary business selling the byproduct to industry. Mercury is still used in some places, high pressure lights and the like. We use a 2000 watt UV lamp based on mercury and we have to find a way to safely dispose of the mercury inside the lamps when they die. About one drop is all they use but that could contaminate a lot of water, one drop of mercury.
  5. Subscriber moonbus
    Uber-Nerd
    05 Dec '17 22:12
    The article did not say how easy it is to get the heavy metals out of the gel, once the contaminated water has been filtered through it, or whether the gel can be re-used (assuming the heavy metals can be extracted from it). Filtering contaminated water is a nice idea, but we don't need a lot of contaminated gel left over any more than we needed the contaminated water.
  6. Standard member wolfgang59
    Infidel
    06 Dec '17 04:52
    Originally posted by @moonbus
    The article did not say how easy it is to get the heavy metals out of the gel, once the contaminated water has been filtered through it, or whether the gel can be re-used (assuming the heavy metals can be extracted from it). Filtering contaminated water is a nice idea, but we don't need a lot of contaminated gel left over any more than we needed the contaminated water.
    Dump the gel in a river. Soon be washed away.
  7. Standard member sonhouse
    Fast and Curious
    06 Dec '17 14:40
    Originally posted by @moonbus
    The article did not say how easy it is to get the heavy metals out of the gel, once the contaminated water has been filtered through it, or whether the gel can be re-used (assuming the heavy metals can be extracted from it). Filtering contaminated water is a nice idea, but we don't need a lot of contaminated gel left over any more than we needed the contaminated water.
    The filter material can certainly be burned off leaving only the metals which can then be sold to industry if nothing else. Just remember when you are dealing with PPB or PPM contamination you are not talking about large amounts of metals. Grams at most. Milligrams most likely.
  8. Subscriber moonbus
    Uber-Nerd
    07 Dec '17 22:19
    Originally posted by @sonhouse
    The filter material can certainly be burned off leaving only the metals which can then be sold to industry if nothing else. Just remember when you are dealing with PPB or PPM contamination you are not talking about large amounts of metals. Grams at most. Milligrams most likely.
    Yes, but milligrams can still be lethal, if ingested. Extracting them from contaminated water is not a bad start but still only half a solution.
  9. Standard member sonhouse
    Fast and Curious
    08 Dec '17 11:56
    Originally posted by @moonbus
    Yes, but milligrams can still be lethal, if ingested. Extracting them from contaminated water is not a bad start but still only half a solution.
    Do you seriously think anyone will injest contaminated filters? They will be processed like any other hazardous waste.