For the clay pot see: http://s189535770.onlinehome.us/pottersforpeace/?page_id=9
http://www.filtersfast.com/blog/index.php/2010/07/filterpure-distributes -clay-pot-water-filters-to-developing-nations/ - Steve N -----Original Message----- From: needling around [mailto:[email protected]] Sent: Wednesday, September 01, 2010 8:50 AM To: [email protected] Subject: EXTERNAL:Re: CS>High-speed filter uses electrified nanostructures to purify water at low cost Do you have the actual name of this pot? When I googled it I got your email below! Thanks. PT ----- Original Message ----- From: "Ode Coyote" <[email protected]> To: <[email protected]> Sent: Wednesday, September 01, 2010 10:23 AM Subject: Re: CS>High-speed filter uses electrified nanostructures to purify water at low cost > > > Then there is Harvey Reid [?] [a silverlister] > That impregnated saw dust with silver [nitrate?] and mixed it with clay to > fire, making activated carbon/silver ceramic pot water filters [in > Africa?] > " Barefoot Native tech".....on a shoe without even a string from WalMart. > > Now, to hook it up to a solar panel and pass a few microamps through it > all...... > > ode > > > > At 07:11 PM 8/31/2010 -0500, you wrote: > >>Some extracts from the article are below. >> >>- Steve N >> >><http://www.rdmag.com/News/2010/08/Materials-Nanotechnology-High-speed -filter-uses-electrified-nanostructures-to-purify-water-at-low-cost/>htt p://www.rdmag.com/News/2010/08/Materials-Nanotechnology-High-speed-filte r-uses-electrified-nanostructures-to-purify-water-at-low-cost/ >> >>High-speed filter uses electrified nanostructures to purify water at low >>cost >> >>By dipping plain cotton cloth in a high-tech broth full of silver >>nanowires and carbon nanotubes, Stanford researchers have developed a new >>high-speed, low-cost filter that could easily be implemented to purify >>water in the developing world. >> >>Instead of physically trapping bacteria as most existing filters do, the >>new filter lets them flow on through with the water. But by the time the >>pathogens have passed through, they have also passed on, because the >>device kills them with an electrical field that runs through the highly >>conductive "nano-coated" cotton. >> >>Silver has long been known to have chemical properties that kill bacteria. >>"In the days before pasteurization and refrigeration, people would >>sometimes drop silver dollars into milk bottles to combat bacteria, or >>even swallow it," Heilshorn said. >> >>Cui's group knew from previous projects that carbon nanotubes were good >>electrical conductors, so the researchers reasoned the two materials in >>concert would be effective against bacteria. "This approach really takes >>silver out of the folk remedy realm and into a high-tech setting, where it >>is much more effective," Heilshorn said. >> >>Using the commonplace keeps costs down >> >>But the scientists also wanted to design the filters to be as inexpensive >>as possible. The amount of silver used for the nanowires was so small the >>cost was negligible, Cui said. Still, they needed a foundation material >>that was "cheap, widely available and chemically and mechanically robust." >>So they went with ordinary woven cotton fabric. >> >>"We got it at Wal-mart," Cui said. >> >>To turn their discount store cotton into a filter, they dipped it into a >>solution of carbon nanotubes, let it dry, then dipped it into the silver >>nanowire solution. They also tried mixing both nanomaterials together and >>doing a single dunk, which also worked. They let the cotton soak for at >>least a few minutes, sometimes up to 20, but that was all it took. > > > -- > The Silver List is a moderated forum for discussing Colloidal Silver. > Rules and Instructions: http://www.silverlist.org > > Unsubscribe: > <mailto:[email protected]?subject=unsubscribe> > Archives: http://www.mail-archive.com/[email protected]/maillist.html > > Off-Topic discussions: <mailto:[email protected]> > List Owner: Mike Devour <mailto:[email protected]> > >
