[Stoves] New paper on atmospheric Black Carbon

[Alex English]

Dan,
It is being studied widely. Everything from pesticides, PCB's and 
miscelaneous hydrocarbons to specific heavy metals. Biochar gets 
compared straight up with Granular Activated Carbons, with some added 
agronomic benefits. That is where it could scale up in the near term.
Alex

On 20/01/2013 12:12 AM, Carefreeland at aol.com wrote:
> I wonder if anyone has tried to clean up contaminated land with 
> biochar?  What effect would it have on heavy metals or oil based 
> contaminants? Lots of prime real estate worthless because of trace 
> contaminants.
>     Dan Dimiduk
> In a message dated 1/18/2013 5:34:45 P.M. Eastern Standard Time, 
> rongretlarson at comcast.net writes:
>
>     Kevin, Crispin and list:
>
>        This is to also answer the two following messages from
>     yourselves.  I did not find them helpful - as they assume the only
>     economics relate to the carbon credit.  They assume nothing
>     (repeat nothing) about the value to the user in outyear ag
>     benefits.  Tell me how farmers in the world will react to news
>     that (for example) land worth zero today can be brought up to a
>     productivity level the same as other existing ag land nearby (same
>     rainfall etc.)   Let's say that land can, after applying biochar
>     be worth $500/ha rather than $0/ha.   If those farmers have a
>     discount rate of 5% or 50% will make a big difference on how much
>     they will be willing to spend per tonne of biochar and how many
>     tonnes per ha  (which could be in rows or holes - not uniformly
>     scattered).   Which discount rate are you using for these out-year
>     benefit computations?
>          You can't prove biochar is worthless by talking to this list
>     only about credits of $6/tonne CO2.
>
>
>
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