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<div class="moz-cite-prefix">Dan,<br>
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.<br>
Alex<br>
<br>
On 20/01/2013 12:12 AM, <a class="moz-txt-link-abbreviated" href="mailto:Carefreeland@aol.com">Carefreeland@aol.com</a> wrote:<br>
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<div>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. </div>
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<div> Dan Dimiduk </div>
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<div>In a message dated 1/18/2013 5:34:45 P.M. Eastern
Standard Time, <a class="moz-txt-link-abbreviated" href="mailto:rongretlarson@comcast.net">rongretlarson@comcast.net</a> writes:</div>
<blockquote style="BORDER-LEFT: blue 2px solid; PADDING-LEFT:
5px; MARGIN-LEFT: 5px"><font style="BACKGROUND-COLOR:
transparent" size="3" color="#000000" face="Arial">Kevin,
Crispin and list:<br>
<br>
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? <br>
You can't prove biochar is worthless by talking to
this list only about credits of $6/tonne CO2.<br>
<br>
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