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, [email protected] 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,
[email protected] 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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