It might be easier to use an inert tracer like sulfur hexafluoride.
SF6 has been successfully used in the oceanography community to track
mixing of water masses many times now. Assuming a 3000 gallon
injection, and a price of about $4/mole for SF6, you could spike your
entire experiment to 500 uM for about $25 worth of tracer.
Also, for those of you teaching students, this is a fun and
attention-getting classroom exercise that uses SF6 to display aspects
of buoyancy, density, and isostasy:
http://sciencehack.com/videos/view/mb3ktPn1MQk
-Steve
------------------------------
Stephen Romaniello
Ph.D. Student
Science Foundation of Arizona Graduate Fellow
School of Earth & Space Exploration
Arizona State University
Tempe, AZ 85287
m. 860-462-6906
On Wed, Aug 19, 2009 at 8:19 PM, Howard Spero<[log in to unmask]> wrote:
> How much of an offset do you need from the original aquifer? Could you use
> glacial ice and inject water with delta D of -350 or -400 per mil (-35 to
> -40 d18O)?
> Howie
>
>
>
> Please note that as of July 1, 2009,
> Howie's email address will permanently change to:
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> ***********************************************
> Prof. Howard Spero
> Department of Geology
> University of California Davis
> Davis CA 95616
> https://www.geology.ucdavis.edu/faculty/spero.html
> (530)752-3307
> [log in to unmask]
> UC Davis Stable Isotope Laboratory:
> http://stable-isotopes.geology.ucdavis.edu/
> ***********************************************
> On Aug 19, 2009, at 7:10 PM, Devon Rowe wrote:
>
> We are contemplating injecting potassium permanganate to study effects on
> contaminants in a shallow groundwater aquifer – in recent discussion with a
> colleague of mine, the idea of mixing our permanganate salt with
> isotopically labeled water was brought up, to be able to track the migration
> through a fractured bedrock system after the permanganate is consumed.
> Where/how does one obtain large quantities of labeled water – we need to
> inject several thousand gallons. Does anyone experience with such an
> exercise, or suggestions? I recall the recent discussion about how to make
> your own enriched waters in a lab setting via evaporation, but the
> quantities were much less than we need (and we don’t have access to a lab).
>
> Any suggestions welcome,
> Devon
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