Re: Cu/Zn dechlorination was: Recycling activated charcoal

[George Slusarczuk <yurko at warwick_net>]

Hello Lee,

I share your worry, that copper/zinc are probably leaching into the
water. We have known for a long time, that copper leaches from fresh
copper pipes. In order to act as a _filter_ (at 4 gal/min flow) the
Cu/Zn surface area has to be huge. Leaching is almost inevitable.

If it is a _couple_, than by definition both copper and zinc ions will
be in solution at some time. What happens to those ions?

Best,

George



LeeH920226 at aol_com wrote:
> 
> In a message dated 2/4/03 1:22:53 PM, jwwiii at pacbell_net writes:
> 
> <<  Can
> anyone explain exactly what is different about this product and the
> common Cu-Zn alloy (aka brass) used for plumbing fixtures for centuries? :-)
> >>
> 
> Maybe I can, now that I read more about it. I believe this is a zinc/copper
> couple not an alloy. There is a lot more information at other sites than the
> one I cited first. Such as:
> http://www.tbaytel.net/gjgourle/index.htm
> http://www.purewaterforu.com/whatiskdf.html
> http://www.naturalsolutions1.com/rainbal1.htm
> http://www.kdfft.com/
> 
>     The claims about removing chloramine are a little vague. Rates may be
> slower and may not work under some conditions. Another concern that I have is
> the inhibiting effects claimed on biological activity, especially focused on
> microorganisms, but what about fish, daphnia, etc.? What is the fate of the
> copper and zinc? Is it leached into the effluent gradually? Will the
> concentration of zinc and copper be harmful?
>     Someone may have to run an experiment ;-?
> 
> Lee Harper
> Media, PA
> USA
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