[Terrapreta] Char sorption of water.

[Kevin Chisholm]

Dear Brian

You could expect a wide variation in results...

 From the 225% you observed, but probably as not as much as teh 850% one 
can get with peat moss.

Some variables could be:
*Physical size of charcoal
*Soaking time
*Soaking pressure
*Water Temperature
*Whether water was saturated with air, or if it had been de-aerated
*Presence or absence of wetting agents
*Presence or absence of salts
*Charcoal firing temerature
etc...

What do you want to accomplish? What is the purpose of your testing?

Best wishes,

Kevin

Brian Hans wrote:
> Im looking for a bit of help.
>  
> Some of you with access to char, could you run a simple experiment and 
> offer some results?
>  
> Putting a fixed amount of charcoal in a vessel, add water until it 
> doesnt pour out of the vessel anymore and record that sorption #.
>  
> An example is that I put in 10g of material into a glass and started 
> adding water until it couldnt uptake it anymore. I then poured out the 
> excess water from the glass and recorded the amount of uptake. In this 
> case, I got ~225% weight uptake.
> Im looking for some others results to compare my material with...
>  
> FYI perlite <http://www.perlite.info/indexes/main.html> = 200-600%
>  
> Thanks for the inputs!
> Brian
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