[Alt-photo] Dichromates and Septic System?

David Christensen agitprop at telus.net
Thu Feb 15 16:12:49 UTC 2018

It may not necessarily be applicable to well water, but Don Nelson on 
the Carbon List and Udo Schnitzbauer on this list both pointed to the 
use of ascorbic acid (vitamin C) for reducing hexavalent chromium.

See this link for the paper “Reduction of hexavalent chromium by 
ascorbic acid in aqueous solutions”:


And this link for Udo Schnitzbauer's post on the forum:



On 2018-02-15 6:46 AM, Diana Bloomfield via Alt-photo-process-list wrote:
> I'm sure this question has been asked and answered before, but I can't
> locate it.  A friend who wants to learn gum printing asked about what to do
> if you have well water?  Does anyone know the answer?  I thought there was
> something you could add to a septic system that neutralizes the dichromate
> somehow??  Thanks!
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