Don't forget that silver hydroxide is formed from silver ions and
hydroxide [hydroxl] anions both produced by the generator at a one to one
ratio, which is what the article says *precipitates* the metal as a
metallic hydroxide.
The 100PPM solubility does not pertain to the Metallic Hydroxide, it
pertains to the dissolved metal content BEFORE it became a Hydroxide AFTER
the addition of the alkalizing agent.
OH[-] Hydroxyl rich water is "Alkaline Water"..the *bitter* in the batch
and is made at the same time, in our case.
The bigger question here is how is it possible to wind up with ANY ionic
Silver content and not ALL of the silver ions eventually convert to
precipitated Silver Hydroxides.
Metal Treatment by Hydroxide Precipitation
"As metals enter the treatment process, they are in a stable, dissolved
aqueous form and are unable to form solids. The goal of metals treatment
hydroxide precipitation is then to adjust the pH (hydroxide ion concentration)
the water so that the metals will form insoluble precipitates. Once the metals
precipitate and form solids, they can then easily be removed, and the water,
with low metal concentrations, can be discharged.
Metal precipitation is primarily dependent upon two factors:
concentration of the metal, and the pH of the water. Heavy metals are usually
present in wastewaters in dilute quantities (1 - 100 mg/L) and at neutral
or acidic
pH values (< 7.0). Both of these factors are disadvantageous with regard to
metals
removal. However, when one adds caustic to water which contains dissolved
metals, the metals react with hydroxide ions to form metal hydroxide solids:"
Ode
At 12:46 PM 7/6/2009 -0500, you wrote:
This article shows the theoretical soluability of silver hydroxide at
a pH of 9 as 100mg/l which would be 100ppm. See page 8:
http://www.mtes.org/documents/pmg_metal_precip_man1.pdf
Dan
On Fri, Jul 3, 2009 at 9:27 AM, Marshall Dudley<mdud...@king-cart.com> wrote:
> Silver hydroxide has a solubility of approximately 13 ppm. It converts
back
> and forth with silver oxide, which also has a 13 ppm solubility. Thus a
> silver hydroxide/oxide solution of silver has a maximum concentration of
> approximately 26 ppm. It is, BTW, the ionic portion of EIS.
>
> Marshall
>
> Rachel Smithies wrote:
>>
>> Hello All,
>> I am curently looking at "ionic silver products" for medicinal purposes. I
>> have found a brand which is 100ppm Ionic Silver by Metabolics. Their
website
>> says that:
>>
>> 10 drops contain:
>> Silver
>> (as Silver Hydroxide).............;9mcg;+;+
>>
>> http://www.metabolics.com/store/natural+healthcare/product/ionsi0100t/
>>
>> I have never seen ionic silver described as silver hydroxide before; is
>> this true soluble ionic silver or actually a silver particle colloid ?
>> I have looked up silver hydroxide on the net but I'm not a chemist and I
>> can't figure out what exactly silver hydroxide is. Can anyone shed sny
light
>> on this? Many thanks.
>> Kind Regards
>> Rachel
>>
>> ------------------------------------------------------------------------
>> Beyond Hotmail - see what else you can do with Windows Live. Find out
>> more. <http://clk.atdmt.com/UKM/go/134665375/direct/01/>
>
>
>
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