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Boil Carbon to reuse?

This is a discussion on Boil Carbon to reuse? within the Freshwater Aquarium Equipment forums, part of the Beginner Freshwater Aquarium category; --> Originally Posted by jaysee It's not my theory. Which publications do you speak of? A simple google on activated carbon will reveal many....

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Boil Carbon to reuse?
Old 09-04-2012, 01:32 PM   #11
 
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Originally Posted by jaysee View Post
It's not my theory. Which publications do you speak of?
A simple google on activated carbon will reveal many.
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Old 09-04-2012, 03:27 PM   #12
 
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You talk about these experts and publications but can't provide more direction than that???

I'll stand by the words of Physical Chemists.
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Old 09-04-2012, 09:07 PM   #13
 
One example - Activated Carbon in the Aquarium

"Does Activated Carbon De-Adsorb?
You may hear that once activated carbon has reached its capacity, it will start leaching some materials it previously adsorbed back into the water. This is not an accurate claim. Although technically possible, to de-adsorb requires changes in the water chemistry that simply do not occur in the aquarium. "
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Old 09-04-2012, 10:05 PM   #14
 
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wow, about.com - a highly respected publication. Written by an avid fish keeper and photographer. That HARDLY makes her an expert on activated carbon, or anything related to chemistry....
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Old 09-05-2012, 07:35 AM   #15
 
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wow, about.com - a highly respected publication. Written by an avid fish keeper and photographer. That HARDLY makes her an expert on activated carbon, or anything related to chemistry....
Again, that was just one example. I've read this over and over in many publications. The notion that once at capacity, activated carbon begins releasing all that it's adsorbed is a myth used by many to discredit it's value in water purification.
I guess we'll have to agree to disagree.
End of discussion.
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Old 09-05-2012, 08:26 AM   #16
 
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Well, you can believe the fish experts and I'll believe the real experts.
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Old 09-05-2012, 01:37 PM   #17
 
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Again, that was just one example. I've read this over and over in many publications. The notion that once at capacity, activated carbon begins releasing all that it's adsorbed is a myth used by many to discredit it's value in water purification.
I guess we'll have to agree to disagree.
End of discussion.
Based on the quality of information cited in this thread, I don't think anyone should be obliged to agree to anything.

I also think it unneccesary to "end a discussion" simply because you can't locate your sources.

Reading the oft-referred-to citation (which I found cut and pasted in at least two other generic sources) I note that wide swings in pH level can cause de-adsorption. I would like to know what level of change in pH is necessary to accomplish de-adsorption. For example, if a person suddenly decided to convert a marine tank to a planted tank and the pH dropped from 8.4 to 6.0, would that do it?

This is the kind of thing alluded to on marine forums with respect to copper adsorbed by calcareous materials, and one of the reasons that use of copper in anything but a quarantine tank comes with its own set of caveats. But if it's true that very low pH could cause a cleansing of activated carbon, shouldn't we be telling our friend verbosity to quit boiling the stuff and use some sort of acidic formulation? Not that the de-adsorbed carbon would ever be safe for aquarium use. . .
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Old 09-05-2012, 03:33 PM   #18
 
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Originally Posted by AbbeysDad View Post
Again, that was just one example. I've read this over and over in many publications. The notion that once at capacity, activated carbon begins releasing all that it's adsorbed is a myth used by many to discredit it's value in water purification.
.
Let's stay on point here. No one is talking about the carbon releasing ALL that it has adsorbed. That's been established as a myth, yes, because it is one - carbon will not spontaneously dump everything. That claim was never made in this thread, however. The point of discussion, up to now has been whether or not things can be bumped out.

There is great shortage of ACTUAL science in fish keeping. There is a lot of uncited information (like in the link) that gets copied and pasted and parroted. This is something that is pervasive in the hobby, across all categories. Just because you read something over and over (in fish keeping publications?) doesn't make it true, especially when one source is just copying another. This occurs in fish profiles ALL THE TIME, and it doesn't end there.
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Old 09-06-2012, 10:17 AM   #19
 
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Based on the quality of information cited in this thread, I don't think anyone should be obliged to agree to anything. I also think it unneccesary to "end a discussion" simply because you can't locate your sources.
My 'end of discussion' remark was intended for Jaysee to communicate a reluctance for further debate for the sake of argument. I saw no reason or purpose to further produce documented evidence that the earth was round, regardless of what some relatives believe.

Here are a few more examples:

Using activated carbon (charcoal) in the aquarium
Activated Carbon in the Aquarium
Using Activated Carbon in the Aquarium - Algone.com
Activated Carbon In Aquarium | Aquariums Life
Activated Carbon - The Free Freshwater and Saltwater Aquarium Encyclopedia Anyone Can Edit - The Aquarium Wiki

Perhaps these sources are all wrong and/or just copied the myth around, but nowhere do I find ANY documentation that de-adsorbtion is possible except, as you point out, in extreme cases of a pH shift so great it could not exist in an aquarium with any surviving fish.

However, before suggesting that the OP soak the carbon in vinegar, it might be better to just throw it out and start fresh.
Or better still... don't use it at all or certainly don't use it regularly. It is understood that activated carbon removes impurities. But it doesn't discriminate and some 'impurities' (including dissolved organics) are important elements for beneficial bacteria, plants and fish.
We might further argue that the glass box aquarium can't truly be compared to waters in nature. However, emulating and leveraging natural conditions in the aquarium would seem to result in a more healthy environment.

Okay, so you called me out and made me go back on my word. Time now to move on to more exciting topics
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Old 09-06-2012, 11:07 AM   #20
 
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Originally Posted by AbbeysDad View Post
My 'end of discussion' remark was intended for Jaysee to communicate a reluctance for further debate for the sake of argument. I saw no reason or purpose to further produce documented evidence that the earth was round, regardless of what some relatives believe.

Here are a few more examples:

Using activated carbon (charcoal) in the aquarium
Activated Carbon in the Aquarium
Using Activated Carbon in the Aquarium - Algone.com
Activated Carbon In Aquarium | Aquariums Life
Activated Carbon - The Free Freshwater and Saltwater Aquarium Encyclopedia Anyone Can Edit - The Aquarium Wiki
Relatives with PhDs. None of the people that wrote any of those "articles" are experts on anything more than MAYBE keeping fish. You should step outside the fish keeping world from time to time....
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