[Coral-List] Artificial reef - cement or metallic /w electrical stimulation?

[Bill Allison]

Hi Philippe,
Thanks for the response.
I have heard it asserted that aragonite can be formed by fine-tuning the
current. I'm very interested in reading the research paper demonstrating
this and how it can be effected in real life. Please provide a citation.
Thanks



On Mon, Jul 10, 2017 at 1:54 AM, Philippe Sanchez <pipobs at gmail.com> wrote:

> Hi Bill,
>
> More and more I think reef balls wouldn't be the best approach. I have
> read that the reefs can be powered by using renewable energy (tide action,
> wind or solar). Since there is plenty of sun, maybe solar panels would be a
> good idea.
>
> Others have told me that the cations/anions formed can be controlled
> depending on the positioning of the cathode.
>
> "Incidentally, whether you get brucite or aragonite depends on the
> specifics of the current supplied"
>
> Thanks for you input!
>
> Philippe
>
>
> On 9 July 2017 at 15:20, Bill Allison <allison.billiam at gmail.com> wrote:
>
>> 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
>> anions.
>>
>> 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,
>> Bill
>>
>>
>> On Thu, Jul 6, 2017 at 7:24 AM, Philippe Sanchez <pipobs at gmail.com>
>> wrote:
>>
>>> 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?
>>>
>>> Thanks!
>>> _______________________________________________
>>> Coral-List mailing list
>>> Coral-List at coral.aoml.noaa.gov
>>> http://coral.aoml.noaa.gov/mailman/listinfo/coral-list
>>>
>>
>>
>>
>> --
>> "... 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
>>
>
>


-- 
"... 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