[Terrapreta] Char sorption of water.

[Brian Hans]

But ofc we all know peatmoss breaks down. So peat vs TP is like comparing a house of cards vs Ayer's rock :) 
   
  Regardless, Im just trying to get a feel for what TP people are working with. I know there will be alot of varied #s which is what Im looking for, real numbers. Just thought it would be an easy experiment for anyone to do in 5 minutes. 
   
  Brian

in Chisholm <kchisholm at ca.inter.net> wrote:
  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 = 200-600%
> 
> Thanks for the inputs!
> Brian
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