seeder Posted April 3, 2017 #1 Share Posted April 3, 2017 This will be a great, now you can filter salt water/dirty water ... and drink it Quote Graphene sieve turns seawater into drinking water Graphene-oxide membranes have attracted considerable attention as promising candidates for new filtration technologies. Now the much sought-after development of making membranes capable of sieving common salts has been achieved. New research demonstrates the real-world potential of providing clean drinking water for millions of people who struggle to access adequate clean water sources. The new findings from a group of scientists at The University of Manchester were published today in the journal Nature Nanotechnology. Previously graphene-oxide membranes have shown exciting potential for gas separation and water filtration. Graphene-oxide membranes developed at the National Graphene Institute have already demonstrated the potential of filtering out small nanoparticles, organic molecules, and even large salts. Until now, however, they couldn't be used for sieving common salts used in desalination technologies, which require even smaller sieves. Read more at: https://phys.org/news/2017-04-graphene-sieve-seawater.html#jCp 6 Link to comment Share on other sites More sharing options...
aka CAT Posted April 3, 2017 #2 Share Posted April 3, 2017 Thinking this report promising, I searched "Projected cost efficiency of desalinating water with graphene membranes?" I found: ------------------------------------------------------------------------------------------------------------------- Low Cost Nanomaterials for Water Desalination and ... - Unesco www.unesco.org/fileadmin/MULTIMEDIA/FIELD/Cairo/Desal...Proxy Highlight enhancement of the rate of water desalination due to presence of efficient photothermal ... of silver nanomaterials and Graphene to enhance the photothermal ... nanoparticles, nanostructured catalytic membranes and nanoparticle ..... Figure (7): Low energy DFT 3D band structure and its projection on kx close to k point K ------------------------------------------------------------------------------------------------------------------- Nonetheless, I await additional news from a worthier source. 2 Link to comment Share on other sites More sharing options...
seeder Posted April 3, 2017 Author #3 Share Posted April 3, 2017 heres is an invention called the Lifestraw.... http://lifestraw.com/ 1 Link to comment Share on other sites More sharing options...
aka CAT Posted April 4, 2017 #4 Share Posted April 4, 2017 The smell would gag me. 2 Link to comment Share on other sites More sharing options...
Parsec Posted April 4, 2017 #5 Share Posted April 4, 2017 About time! It's years that we are talking about it, maybe finally we'll see some concrete development. 2 Link to comment Share on other sites More sharing options...
Chortle Posted April 4, 2017 #6 Share Posted April 4, 2017 Way too many "could" and "may" like statements in there... I "may" get excited about this in the future if they "could" offer something more concrete 6 Link to comment Share on other sites More sharing options...
Farmer77 Posted April 5, 2017 #7 Share Posted April 5, 2017 On 4/3/2017 at 4:04 PM, seeder said: heres is an invention called the Lifestraw.... http://lifestraw.com/ I know many who have used the lifestraw in all kinds of back country situations and never once has anyone had any problems with it not working. 3 Link to comment Share on other sites More sharing options...
aka CAT Posted April 5, 2017 #8 Share Posted April 5, 2017 (edited) 7 hours ago, Chortle said: Way too many "could" and "may" like statements in there... I "may" get excited about this in the future if they "could" offer something more concrete Much is possible with nanotechnology today. Thus, key to the main article, the development of graphene-oxide membranes and the feasibility of using them to purify water was the statement following: "Professor Rahul Nair, at The University of Manchester said: "Realisation of scalable membranes with uniform pore size down to atomic scale is a significant step forward and will open new possibilities for improving the efficiency of desalination technology." Edited April 5, 2017 by aka CAT 2 Link to comment Share on other sites More sharing options...
Myles Posted April 5, 2017 #9 Share Posted April 5, 2017 On 4/3/2017 at 4:04 PM, seeder said: heres is an invention called the Lifestraw.... http://lifestraw.com/ She may have issues. She keeps drinking it. 1 Link to comment Share on other sites More sharing options...
seeder Posted April 5, 2017 Author #10 Share Posted April 5, 2017 1 hour ago, seanjo said: How will it be cleaned? the pores will get blocked up...maybe turn it upside down and tap it? maybe they will just add new filters and discard the old? Link to comment Share on other sites More sharing options...
danielost Posted April 6, 2017 #11 Share Posted April 6, 2017 On 4/3/2017 at 11:08 PM, aka CAT said: The smell would gag me. we taste with our nose as much as with our mouth. so only if absolutely needed. 1 Link to comment Share on other sites More sharing options...
danielost Posted April 6, 2017 #12 Share Posted April 6, 2017 7 hours ago, seanjo said: Pretty sure they can do that anyway with present materials tech....is graphene cheaper maybe? i don't think you can filter sea water until now. Link to comment Share on other sites More sharing options...
danielost Posted April 6, 2017 #13 Share Posted April 6, 2017 10 hours ago, seeder said: maybe they will just add new filters and discard the old? what do you do with the used filters and how often do you need to change them. we need cleanable filters that don't get thrown away every time they get dirty. Link to comment Share on other sites More sharing options...
seeder Posted April 6, 2017 Author #14 Share Posted April 6, 2017 5 minutes ago, danielost said: what do you do with the used filters and how often do you need to change them. we need cleanable filters that don't get thrown away every time they get dirty. they are re-useable do read https://phys.org/news/2017-03-reusable-carbon-nanotubes-filter-future.html 1 Link to comment Share on other sites More sharing options...
danielost Posted April 6, 2017 #15 Share Posted April 6, 2017 12 minutes ago, seeder said: they are re-useable do read https://phys.org/news/2017-03-reusable-carbon-nanotubes-filter-future.html good, but what do you do with the waste product. the salt could be used on icy sidewalks. but what about the rest. Link to comment Share on other sites More sharing options...
seeder Posted April 6, 2017 Author #16 Share Posted April 6, 2017 2 minutes ago, danielost said: good, but what do you do with the waste product. the salt could be used on icy sidewalks. but what about the rest. sell it, as sea salt,,, like we do already 2 Link to comment Share on other sites More sharing options...
danielost Posted April 6, 2017 #17 Share Posted April 6, 2017 6 minutes ago, seeder said: sell it, as sea salt,,, like we do already i was thinking of the bacteria that might be in it. Link to comment Share on other sites More sharing options...
seeder Posted April 6, 2017 Author #18 Share Posted April 6, 2017 11 minutes ago, danielost said: i was thinking of the bacteria that might be in it. who gives a crap...people need water....and you just focus on salt!! 1 1 Link to comment Share on other sites More sharing options...
danielost Posted April 6, 2017 #19 Share Posted April 6, 2017 (edited) yes people need more water than food but not by much. of course the salt could destroy the bacteria and you could use it for table salt. i am also thinking of a project in which i could use as much fresh water from sea water as i can get and this looks cheaper and faster than other ways of doing it. Edited April 6, 2017 by danielost Link to comment Share on other sites More sharing options...
seeder Posted April 6, 2017 Author #20 Share Posted April 6, 2017 4 minutes ago, danielost said: project in which i could use as much fresh water from sea water as i can get and this looks cheaper and faster than other ways of doing it. OK. Look up how much salt is in a ton of seawater...and come back with some info. It may be less that you think Link to comment Share on other sites More sharing options...
danielost Posted April 6, 2017 #21 Share Posted April 6, 2017 1 minute ago, seeder said: OK. Look up how much salt is in a ton of seawater...and come back with some info. It may be less that you think not enough to sell but more than you need to cook with. Link to comment Share on other sites More sharing options...
seeder Posted April 6, 2017 Author #22 Share Posted April 6, 2017 3 minutes ago, danielost said: not enough to sell but more than you need to cook with. Quote The concentration of salt in seawater (salinity) is about 35 parts per thousand. Stated in another way, about 3.5 percent of the weight of seawater comes from the dissolved salts; in a cubic mile of seawater, the weight of the salt (in the form of sodium chloride) would be about 120 million tons. Link to comment Share on other sites More sharing options...
danielost Posted April 6, 2017 #23 Share Posted April 6, 2017 5 minutes ago, seeder said: ok sell it as table salt or preservative. Link to comment Share on other sites More sharing options...
Unfortunately Posted April 6, 2017 #24 Share Posted April 6, 2017 1 hour ago, seeder said: who gives a crap...people need water....and you just focus on salt!! I have to agree with Seeder on this, finding a way to produce fresh water en mass is much more important for the world and is an incredible feat of engineering. The byproduct (unless directly/indirectly harmful to life) is pretty irrelevant. 2 Link to comment Share on other sites More sharing options...
danielost Posted April 6, 2017 #25 Share Posted April 6, 2017 5 minutes ago, Unfortunately said: I have to agree with Seeder on this, finding a way to produce fresh water en mass is much more important for the world and is an incredible feat of engineering. The byproduct (unless directly/indirectly harmful to life) is pretty irrelevant. too much salt is harmful to life. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now