Can a silver necklace be used like Colloidal Silver ?

Collodial Silver (silver ions in suspension - usually water) is supposed to have antiseptic properties. Do you think it would be enough to simply place a piece of solid silver jewellery into water to get more or less the same effect - even if the item was left in solution for, say, a week or so? Thanks.

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kelseymh7 years ago
Not really. Solid metallic silver is not soluble in water. You would need to grind the metal into microscopic particles in order to put them into suspension (that's what a colloid is). You can also use electrolysis to produce silver ions in aqueous solution.

Silver ions are known to have topical antiseptic/antibiotic properties, and are currently used as an additive in wound dressings. Note that ingestion of "colloidal silver" has no demonstrated medical benefit whatsoever, and substantial evidence of adverse side effects.
kevinhannan (author)  kelseymh7 years ago
I also meant to add that boats/ships water tanks are silver-plated internally as well.
Can you provide a source for this? I can't find evidence for it, and I'm familiar with numerous large water tanks (polyethylene) which are not painted internally.
kevinhannan (author)  kelseymh7 years ago
I was helping a friend with building a canal boat a few years ago - he had all the internet sources which I read but did not take a copy. I did a quick search before replying to you, but could not recognise the websites he accessed. He is not on the 'net at the moment, but for sure, if I can get the sources within a reasonable time I will give them. He went so far as to ask for several quotes to get his main water tank silver-plated but I think it was too much for him.
I really would be interested in your friends sources. What you've mentioned may be historically true (i.e., those cultures certainly used silver eating and drinking implements among their upper classes), but the science is not consistent with my knowledge of chemistry and biochemistry.

Since I'm a professional physicist, and not a chemist or biologist, there may well be gaps in my knowledge, which I appreciate having filled in :-)
kevinhannan (author)  kelseymh7 years ago
I believe this to be not true because in the Medieval times and Ancient Greek times there have been documented uses of solid silver to 'purify' the water - the solid silver vessels made the water safe(r) to drink.

I appreciate that the efficacy is improved by ionising the silver and also by using electrically-charged silver nano-rods to produce collodial silver - but these are beyond me and my skills - hence my desire to get some backup information about using solid silver.

I am led to believe that the action of the water also minutely dissolves the silver, something which is ehanced by rubbing actions such as lips against a silver vessel, water being allowed to fall or cascade onto the silver which is minutely abrasive, thus releasing some silver particles into the water.

I'm not challenging your answer - which I'm grateful for, just trying to share the 'knowledge' such as it is for further discussion. Thanks enormously for your time to write. ;-)
Just because "the old ones" conducted certain activities doesn't mean that they had either evidence to back up those activities, or that those activities actually did anything useful. Consider bloodletting as a well-known example.

It's certainly true that silver drinking and eating implements would be cleaner than wood or iron. The silver surfaces do resist contamination. Extending that to having the vessels "purify water" is a stretch; I would very much appreciate a link to documentation supporting that description.

As for solubility, silver is insoluble at ambient temperature and pressure. In pure water, it doesn't not tarnish, but in water containing ozone or hydrogen sulfide it will tarnish (forming either an oxide or sulfide surface layer).

maddogfenby7 years ago

The medical uses of silver include its incorporation into wound dressings to treat external infections, and its use as an antiseptic and disinfectant in medical appliances. Silver is also promoted within alternative medicine in the form of colloidal silver, although it has never been proven to be safe and effective in this application.

Also read the part that talks about Adverse Health Effects, and the section on Regulation
Nor has it been disproved as having medicinal value. Just because it hasn't been studied (because it can't be patented), doesn't mean it isn't valuable.

I mean what medically proven value does dihydrous oxide have? Many people have been killed by it.
kevinhannan (author)  maddogfenby7 years ago
Yes, I agree its use is contentious at best. I am aware of the Agyra condition which is more than a little worrying! Thanks for your time to reply ;-)