Alchemy in the Desert, Diesel Exhaust into H2O

Carl Bialik writes "The Wall Street Journal is reporting that 'Using technologies developed for the space program, the U.S. Army is conducting an experiment that could convert the exhaust pipes of military vehicles into water fountains.' The idea is meant to help alleviate the logistical challenges presented by two essential army liquids: water and diesel fuel. A soldier in the desert needs about 20 gallons of water a day, for all purposes; 'Water gets to the front in vulnerable, slow-moving truck convoys that require armed escorts, or it is pumped from local rivers, lakes or ponds and purified by heavy-duty filters.' And maybe, in the future, it will also be extracted from diesel exhaust. The president of a company that developed the test technology tells the WSJ: 'This is one of those things where, when you first hear about it, you think the scientists have gone out of their minds. But once you taste the water, you realize the potential.'"

Comments

This has come out before

[Wierd Willy]

Scientific American had an article about 15 years ago on this.

Wired has a good article on this:
http://www.wired.com/news/print/0,1294,65035,00.ht ml

Re:Chlorine?

[DasBub]

If you re-read the article you'd notice that the amber-coloured water was after four filtering steps, not the entire six.

After the amber stage is reached, it goes through two more filters and then chlorine is added to keep the water from getting funky while waiting to be dispensed.

So chlorine isn't used as a filtering agent, more of a preservative.

Re:What about the nasties in the exhaust?

[kimvette]

You intake uranium every day in your food anyhow, and it's actually a very common element (just not the isotopes used to build nukes). It's in everyone's drinking water. http://www.epa.gov/radiation/radionuclides/uranium .htm has some info you'll want to read.