[sdiy] Eu might be banning Vactrols and LDRs??

[Bob Weigel]

It's just a common sense issue.  Common sense should tell someone that 
Cadmium is a naturally occurring element.  So it's all over the place in 
*some* quantity.  AND THE REAL question is...will the tiny amount 
integrated (even if it were RAW..though as David and others note, it's a 
compound that has nothing in common electro chemically with RAW Cadmium 
in this instance :-)  )  into a plastic sealed object in some electronic 
device...how *much* of that is really going to ...'wander out' some day 
and interact in anyone's life in a significant way??

Common sense should tell us 'uhhh..neverrrrr' :-)

This kind of thing like I say is usually purely driven by someone who 
actually has knowledge of a way to make money off the scam at the top.  
I just don't believe people who get into office can be both that stupid 
AND REMAIN that stupid amidst having the counsel of scientific advisors 
who should immediately see the flaw in their irrational fear.

-Bob

richarnt wrote:

> Ian Fritz wrote:
>
>> At 10:39 AM 9/9/2009, David G. Dixon wrote:
>>
>>> Yes, but sulfides are amenable to oxidative
>>
>>
>> So you are saying that CdS cells oxidize?  I did not know that.  :-)
>>
>>
>>>  Cadmium contamination is a nasty proposition, as it can cause 
>>> serious birth defects.
>>> However, there are cheap and effective ways to dispose of it.  It just
>>> requires a little coordination and forethought.
>>
>>
>> Cd plating is all around you.
>> http://www.thomasnet.com/products/cadmium-plating-61520300-1.html
>>
>> Ian
>
> Ian, you need to refresh your basic chemistry. There is a difference 
> between atoms in their STP ground state (as Cd metal, Na metal, or 
> chlorine gas for example) and their various other states as ions, 
> radicals, part of a covalent bonding or whatever other state that is 
> relevant in a given substance. David is talking about Cd2+ ions which 
> can replace more common metal ions (typically Fe2+ as far as I can 
> recall) in water seeping through soil, this then enter plant life, 
> aggregates through the food chain and severely mess up biochemistry 
> near the top of the chain (that would be us). Cd metal is fairly 
> harmless, but when it ends up as waste at the dump it will tend to 
> oxidize and become Cd2+.
>
> The constituents of NaCl are Na+ and Cl-. When dissolved in water, you 
> get complexes of water molecules and these ions, and they are very 
> inert. You need to add energy to get the highly reactive and dangerous 
> neutral sodium metal and chlorine gas (you can do that by melting the 
> salt and do electrolysis of the melt in an inert atmosphere...not 
> recommended for DIY). But roughly two tablespoons of table salt will 
> kill you if ingested as the salt will dissolve, enter the blood stream 
> and suck the water out of the cells in your body by osmosis. That is 
> however not dangerous enough to be labelled toxic. And usually you 
> will vomit before the salt is dissolved, the body has some tricks up 
> its sleeve.
>
> Richard
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