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Scientists "Invent Reverse Osmosis"

04/04/2017 6:48 AM

This has been all over the BBC news programs today:

http://www.bbc.co.uk/news/science-environment-39482342

Just like they'd never heard of reverse osmosis. Ok, the graphene version may work more efficiently than the currently-used membranes, but it's not exactly a new concept.

Interviewer: "So you just sieve the salt out?"

Interviewee: "Yes. You put the seawater onto the membrane, and apply a little bit of pressure."

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#1

Re: Scientists "invent reverse osmosis"

04/04/2017 7:04 AM

Where fractionalization is cause with high pressure.

One of the things that have changed is the design of the membranes,... in material and construction where the pressures are lowered from where it was say,... 25-30 years ago.

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#2

Re: Scientists "invent reverse osmosis"

04/04/2017 9:52 AM

It's so easy to take the popular media by surprise with supposedly 'new' concepts. Morons.

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#3

Re: Scientists "invent reverse osmosis"

04/04/2017 10:24 AM

Is it safe to ingest graphene? Yes?

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#4
In reply to #3

Re: Scientists "invent reverse osmosis"

04/04/2017 8:48 PM

Yes. It tastes like chicken.

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#5
In reply to #4

Re: Scientists "invent reverse osmosis"

04/05/2017 4:30 AM

Oh, i figured it out, carbon fiber is a different thing than graphene. I read some days ago, carbon fiber particles contaminates the air, or may be not exactly that is.

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#7
In reply to #5

Re: Scientists "invent reverse osmosis"

04/05/2017 10:10 AM

Ordinary graphite consists essentially of stacked layers of graphene. That stuff in your pencil lead (graphite mixed with clay or other compounds to control hardness). Anyone who has used a pencil has seen and touched - and probably ingested - graphene. Charcoal contains graphene.

The only difference here is that is that this graphene is synthesised under controlled conditions to produce a high-quality monolayer, but otherwise it is the same stuff.

Carbon fibres? Cellulose - the main constituent of wood - produces carbon fibres when burnt. Ever breathed the smoke from a wood fire or got ash on your hands? Lots of carbon fibres there. Soot from kerosene lamps and candles contains buckyballs - C60, aka fullerene. The Human race has encountered all of this stuff throughout history. We just didn't know it.

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#8
In reply to #7

Re: Scientists "invent reverse osmosis"

04/05/2017 10:19 AM

There is this thing called "carbon black". The MS data sheet says its carcinogen. Is it the same family of carbon materials? If it is, seem like not safe for use.

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#9
In reply to #8

Re: Scientists "invent reverse osmosis"

04/05/2017 10:28 AM

According to the criteria in OSHA HCS (2012) for classifying hazardous substances, carbon black is not classified for any toxicological or eco-toxicological endpoint. It is combustible however and the dust when dispersed in air can be explosive, but then, so is finely-divided sugar when similarly dispersed.

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#13
In reply to #8

Re: Scientists "invent reverse osmosis"

04/06/2017 8:22 AM

The LD50 for water in humans is about 180lb/individual. It's not the substance, it's the dose.

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#16
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Re: Scientists "invent reverse osmosis"

04/07/2017 1:01 AM

LD 50 for H2O for humans is much lower than that.

It depends on route of administration. We are likely most tolerant of intraperitoneal with an ld50 around 190 g/kg. ..... so 180 lbs could be the ld50 for a population of people as long as they weigh around 950 lbs.

We are probably least tolerant of inhaled water, especially if it is not salt water....it doesn't take much fresh water aspirated to result in death.

IV administration of pure water has an ld50 around 2.5% body weight or 2.5 g/kg.

Oral administration ld50 is somewhere around 10% body weight or 100 g/kg

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#14
In reply to #8

Re: Scientists "invent reverse osmosis"

04/06/2017 1:23 PM

Charcoal filters are commonly used for filtering drinking water.

https://en.wikipedia.org/wiki/Carbon_filtering

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#15
In reply to #14

Re: Scientists "invent reverse osmosis"

04/06/2017 3:39 PM

Usually for already potable water to remove off taste and smells...

RO for the more undrinkable water.

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#6

Re: Scientists "Invent Reverse Osmosis"

04/05/2017 5:57 AM

Thanks, I was puzzled by this 'revelation' too. It seems using any alternate materials is a scientific discovery when using old technology. The next discovery will be using salt water and fresh water to produce electricity using the graphine membrane, an existing technology not often discussed or mentioned.

Now we will see Marmite sales soar.

http://news.sky.com/topic/marmite-6535

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#10

Re: Scientists "Invent Reverse Osmosis"

04/05/2017 1:41 PM

Anybody heard of using sausage casings as the membrane in dialysis machines? Used to be done that way many, many decades ago before the synthetic membranes became commonplace.

I'm getting tired of "new" revelations that are rehashes of old ideas, like the "Secrets of the _______" tv shows (You fill in the blank) that are compilations of old footage.

Can't believe how lazy the reporters are these days.

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#11
In reply to #10

Re: Scientists "Invent Reverse Osmosis"

04/05/2017 2:25 PM

Anybody heard of using sausage casings as the membrane in dialysis machines? Used to be done that way many, many decades ago before the synthetic membranes became commonplace.

Really?,...

ok,... the old way is the natural way by using the animal intestines from the slaughter houses, new way is using collagen.

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#12

Re: Scientists "Invent Reverse Osmosis"

04/05/2017 9:44 PM

I was going to say although reverse osmosis already exists, maybe this is the English way to do it.

The response from​ the interviewee sounds like he has spent too many years in the colonies and has lost his native language decorum.

Then there was the article, nothing there, no really valuable information.

1. A picture of an artist's representation.

2. A picture of a hose bib.

How about,, a picture of a prototype process unit.

Nah, that kind of stuff just confuses the masses.

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