Talk:Activated carbon

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[edit] Methods of preparation of activated carbon

The two broad processes by which we can make activated carbon area physical and chemical activation, not steam and chemical activation, actually steam activation is part of it. I found it wrong so correcting this now, beside this i am adding some more details about the two processes. In case anyone have some questions then please discuss. Regards---SUHAS

I stumbled over the term "aBsorption" in this article in the last sentence of the first paragraph. Unless I'm very much mistaken, this should be "aDsorption", shouldn't it ? I'd appreciate some comments on this before we change it. Regards, Fkoenig 17:50, 2 June 2006 (UTC)

Carbon!

Old encyclopedias mention "bone black" on this topic...maybe that phrase should appear somewhere...
User:Polyparadigm
It appears that bone black is slightly different than the processed activated carbon.
Why do we have that second link on the page? It appears to have nothing to do with carbon, other than that the students applying for the internship/grant money might use it...
-- ~ender 19:09:MST

[edit] Incomprehensible

"Tests of adsorption behaviour are usually done with nitrogen gas at 77 K under high vacuum, but in everyday terms activated carbon is perfectly capable of producing the equivalent, by adsorption from its environment, liquid water from steam at 100 °C and a pressure of 1/10,000 of an atmosphere." Seems unintelligible to me. Does it mean that adsorption tests are done with both nitrogen gas and activated carbon? If so, what is the role of liquid water in such a prosedure, and the meaning of pressure? Should the quoted content be simplified, explained, divided to multiple parts or what? 193.166.173.23 13:55, 1 Jun 2005 (UTC)

Ok, I think I got it. Adsorpion can be tested either with gas or steam. They way it's told is really tricky tho. 193.166.173.23 16:53, 1 Jun 2005 (UTC)

[edit] Mechanism of adsorption

What is the chemical mechanism by which adsorption occurs? Charge, hydrophobicity, hydrogen bonding, etc.? Could be explained in more detail.


London dispersion force linking Done.

[edit] Clean up?

It strikes me that the following words are subjective, confusing and too casual for an encyclopedia. (from anon march 1 2006)

"...with a few wood chips thrown in for good measure. There are a great number of nooks and crannies..."

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[edit] Alcohols

"Alcohol (such as ethanol, methanol, isopropyl alcohol, glycols, and acetone)" - acetone is not an alcohol

Oh but it is. See Enol.:) GreatMizuti 12:06, 3 September 2006 (UTC)

[edit] Desorption and recovery

It seems there are methods to recover adsorbed material from activated carbon, but I can't find any information on methods of doing so. If anyone has access to such information, adding it to the article would be welcome. --Six.oh.six 16:45, 10 May 2006 (UTC)


[edit] Applications

It's used in a hangover cure sold in Ireland.

http://www.getalifeline.com http://www.rte.ie/health/2005/0708/health1054118.html

I've used it a few times because it was free but don't know for sure if it's effective because I'm pretty random with my hangovers anyway. Could someone who knows wikipedia standards maybe add a line about it.

[edit] Cleaning of activated carbon

In the water purification process,there is a wash back step to clean up. This step normally using water. Is there any effect to the activated carbon use in the column by using alkali solution? How about acid solution? Will carbon become less effective and brittle?

Thanks

[edit] Vodka

Wasn't this debunked on Mythbusters? As I recall, professional taster was unable to discern any difference in the quality of charcoal filtered vodka. I trust them much more the reference given for this section. Gorman 11:46, 26 November 2006 (UTC)

The expert put them in perfect order, worst was control, up to 6 passes then top shelf, he even said it wont make it perfect but it does make it better. They considered it a bust because to make it as good as the top self you would need to spend more on brita filters then just buying the good stuff! Wolfmankurd 21:21, 1 June 2007 (UTC)

I hate to say it but Mythbusters is not reliable science. Good spirits are almost always passed through activated carbon to remove impurities. Nitrates can be removed using this method if I'm not mistaken. —Preceding unsigned comment added by 129.133.142.224 (talk) 00:06, 3 September 2007 (UTC)

Does anyone remember Rick's Spiked Lemonade? There's an old rumor it was made from lemon flavored and sweetened vodka. There's also a rumor that Mike's Hard Lemonade is a malt beverage (i.e. beer) that has gone through so much activated carbon that the beer flavor and color is removed so lemon-flavor and sugars can make it taste completely different. If someone can verify, that's more useful than the Vodka section. —Preceding unsigned comment added by Dagordon01 (talk • contribs) 21:11, 15 October 2007 (UTC)

[edit] Surface Area

If we're talking about surface area on a microscopic level, wouldn't a tennis court have a much higher surface area than given here in that case? Maybe this should be clarified as "a microscopically perfectly smooth surface the size of a tennis court" or something to that effect.

[edit] Carborabbi

What do observing jews use instead of carbo activatus tablets to treat diarrhea? If I understand correctly, actived carbon pills for medical use are manufactured via controlled burning of animal blood, a "dirty" substance whose ingestion is banned according to Moses' Law. This ban was overturned for christians (as described in the Acts of the Apostles), but not for religious jews. 82.131.210.162 16:22, 15 August 2007 (UTC)

[edit] Examples of adsorption SECTION

is there any DIRECT connection between this section and the activated carbon??

I dont think so, they dont even name AC! Why dont we remove it ?


Nandobike 05:41, 4 September 2007 (UTC)

It seems more appropriation under the separate wikipedia article "adsorption". -Dagordon01 19:08, 1 December 2007 (UTC)