DeAdFX
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Need help destroying nasty organics
I was recently using a motar and pestle to grind up some pentachlorophenol(PCP) for some pyrotechnic experiments. Now that I am finished grinding up
PCP I wish to use it for more "benign" grinding. Technical grade PCP also contains chlorinated Dioxins.
I was wondering if basified hydrogen peroxide (oxy-clean) would be an acceptable way to destroy this compound. To be more specific I wish to only
have Chloride ions/Carbonate ions/water/benign organic compounds left over. I hear that a mixture of Iron +2 or +3 ions are used in conjunction with
Hydrogen peroxide to destroy organics but I currently lack any soluble iron compounds. I do have steel wool though...
[Edited on 23-7-2007 by DeAdFX]
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BromicAcid
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Don't let the EPA find that stuff. There are no incinerators in the US that will take pentachlorophenol waste, as it is a dioxin precursor and
carries the F027 code. You have to ship the stuff to Canada and the minimum disposal cost might be $400 or more depending on where you take it. But
enough of this kind of warning crap, H<sub>2</sub>O<sub>2</sub> with iron, or Fentons Reagent as I prefer is good for chewing
up organics. Steel wool with a little bit of NaCl will work to generate your iron compounds in situ, add a little acid too, to speed things along.
However pentachlorophenol is surprisingly resilient to many forms of attack. There are methods to reduce chloro groups off benzene using magnesium
metal however the exact details are lost to me. Hopefully someone here will have some better ideas for you.
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Ozone
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I was going to suggest the ol' Fenton myself. I do know that pentachlorophenol is quite soluble in acidified ether, for what that's worth. Another
route may be to expose it to strong sun for several days (most chlorinated organics will bite it this way, albeit rather slowly).
FeCl3 is an ideal (and acidic) water soluble iron salt which (recently, I have found) contains around 0.78% Fe2+ (on iron) when dissolved under N2
(from hydrate, lumps). This is more than enough to get your Fenton cycle started. It can be had at radio shack as PC board etchant.
Good old bleach might work too.
Cheers,
O3
[Edited on 23-7-2007 by Ozone]
-Anyone who never made a mistake never tried anything new.
--Albert Einstein
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halogen
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Or a UV lamp if sun is not quite available.
"I was recently using a motar and pestle to grind up some pentachlorophenol(PCP) for some pyrotechnic experiments. "
"There are no incinerators in the US that will take pentachlorophenol waste, as it is a dioxin precursor and carries the F027 code. You have to ship
the stuff to Canada and the minimum disposal cost might be $400 or more depending on where you take it."
I suppose you could incinerate it yourself given your interests? I don't suppose KOH and strong heat in low water env. would do the trick would it?
F. de Lalande and M. Prud'homme showed that a mixture of boric oxide and sodium chloride is decomposed in a stream of dry air or oxygen at a red heat
with the evolution of chlorine.
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The_Davster
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Conc. Sulfuric then slow addition of KMnO4, or perhaps pirhanna solution.
Or do all of what has been mentioned, one after the other. Can never be too careful.
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BromicAcid
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Yeah, dioxin precursors have the stigma of necessitating 6-9's disposal. I.e., after disposal 99.9999% of the material must be destroyed.
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DeAdFX
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Hmm thanks guys... I think I might have some HCL kicking around somewhere. I will probably dump a little HCL + water + steel wool to make some
FeCl2-3.
I might try permanganate or dichromate oxidization. I think I have more dichromate to spare anywho..
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jokull
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| Quote: | Originally posted by DeAdFX
Hmm thanks guys... I think I might have some HCL kicking around somewhere. I will probably dump a little HCL + water + steel wool to make some
FeCl2-3.
I might try permanganate or dichromate oxidization. I think I have more dichromate to spare anywho.. |
Hi, if you are going to try the Fenton's reagent option it would be useful to add some titanium dioxide and irradiate this mixture under a black light
lamp (the UV lamp someone suggested).
With this method I have destroyed PCP in soil at concentrations up to 105ppm within 8 hours. Hope you may try it 
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