[Coral-List] Artificial reef - cement or metallic /w electrical stimulation?
wijgerde at coralpublications.com
Wed Jul 12 10:27:10 EDT 2017
Interesting hypothesis. I think bicarbonate transport occurs via an anion
exchanger and/or via CO2 diffusion. I reckon that if the pH around the coral
increases, this would help the calcium ATPase pump remove protons from the
calcifying medium, per Paul Jokiel's proton flux model.
From: coral-list-bounces at coral.aoml.noaa.gov
[mailto:coral-list-bounces at coral.aoml.noaa.gov] On Behalf Of Damien Beri
Sent: Sunday, July 9, 2017 11:45 PM
To: Bill Allison <allison.billiam at gmail.com>
Cc: coral-list coral-list <coral-list at coral.aoml.noaa.gov>
Subject: Re: [Coral-List] Artificial reef - cement or metallic /w electrical
Does the electrical field generated by the anode and cathode inside the reef
frame, not raise the pH across the surface of the corals thus making it
easier and less costly for the CCM to sequester bicarbonate into the
calicoblastic cells of the coral, and force the precipitate of CaCO3?
Sent from my iPhone
> On Jul 9, 2017, at 7:20 AM, Bill Allison <allison.billiam at gmail.com>
> Hi Philippe,
> You might want to consider:
> 1. Production of both concrete (reef balls) and steel (electro reef)
> have large carbon footprints.
> Transport of materials and transport and emplacement of the structures
> also produce carbon dioxide and heat.
> I have not seen a cost-benefit incorporating these considerations.
> 2. Re. electric current approach.
> A negative current will draw cations and a positive current will draw
> Presumably the Ca2+ and Mg2+ are of interest but there are other
> cations out there.
> The area becomes supersaturated with cations and whatever is in the
> vicinity will be precipitated.
> The amorphous mass formed is mostly brucite and unlikely to crystalize.
> Good luck,
>> On Thu, Jul 6, 2017 at 7:24 AM, Philippe Sanchez <pipobs at gmail.com>
>> Hi all,
>> I've been looking at some artificial reef projects, specifically in
>> the UAE. Reef balls seem to be quite popular. A friend recently told
>> me about increasing growth and survival rate by applying a small
>> electrical current (I'd never heard of this before). I read the paper
>> (Goreau, T.J. 2014) and it seems very promising. I wondered why this
wasn't more well known??
>> Perhaps it's too expensive for people to set up?
>> Does anyone here have any experience working with such a project or
>> can give some insight on the pros and cons of this innovative method?
>> Coral-List mailing list
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> "... the earth is, always has been, and always will be more beautiful
> than it is useful."
> - Ophuls, 1977
> "My name is Ozymandias, King of Kings; Look on my Works, ye Mighty,
> and despair!"
> - Shelly
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