Researchers Develop "Tea Bag" Water Filter 119
cybernanga writes "A group of researchers in South Africa has developed a filter that can purify water straight from the bottle. The filter sits inside a tube fitted on top of a bottle and purifies water as it is poured on a cup. From the article: 'The designer behind the filter, Dr Eugene Cloete, from the Stellenbosch University in South Africa, says the filter is only as big as an ordinary tea bag. He says the product is cost-effective and easy to use. "We are coming in here at the fraction of the cost of anything else that is currently on the market," says Dr Cloete on BBC World Service.'"
Small filter (Score:2, Insightful)
"We cover the tea bag material with nano-structured fibres, and instead of tea inside the tea bag, we incorporate activated carbon.
"The function of the activated carbon is to remove most of the dangerous chemicals that you would find in water."
1. It would have to be one shot - I don't see that little bag filtering more than one bottle.Wouldn't that little bit of carbon be exhausted after 500ml?
2. The pour rate would have to be really slow so that the water stays in contact with the carbon long enough to absorb the toxic stuff. Five minutes+ for a cup of water??
3. It doesn't say anything about metals.
Re:Cue the conservativism jokes! (Score:3, Insightful)
and does not make inappropriate sexual comments about Tea Partygoers.
I thought Teabaggers were all for restoring the rights given by the constitution, regardless as to whether what's being said doesn't agree with their worldview?
Oh, sorry, I got caught up in theory and rhetoric.
Re:The Clorox solution (Score:2, Insightful)
The charcoal filter would be good to use *after* you sanitized the water with chlorine bleach. Kill off the biologicals and then get rid of the chlorine taste.
Re:Small filter (Score:5, Insightful)
1. Yes, that's the point (might be a bit more than 500ml).
2. Not everybody is as impatient as you seem to be.
3. It's good old activated carbon again. There's plenty of info out there...
Re:Say it with me. (Score:4, Insightful)
I think their target market is "cheap", not "best".
The "lifesaver" water bottle may save lives, but a few very rich lives
This "tea bag" thing may not produce water as pure or safe, but might save many more lives if it really is cheaper, easy to use and practical.
FWIW the 100% way to prevent many trillions of human deaths is to kill all humans now, so be careful if you ever ask a super smart AI to minimize the long term total number of human deaths per year
Tea bag, except you don't use it like one (Score:1, Insightful)
my BS detector went wild (Score:5, Insightful)
Re:Say it with me. (Score:1, Insightful)
And part d is likely inhumane.
(Do you really think it's that easy? Take democracy, add water, poof! It's like a libertarian's wet dream)
Re:Small filter (Score:4, Insightful)
2. The pour rate would have to be really slow so that the water stays in contact with the carbon long enough to absorb the toxic stuff. Five minutes+ for a cup of water??
5 minutes for water versus running to the toilet every 5 minutes. Good trade.