[TheForge] Sodium Bisulphate Pickle

[Bruce Freeman]

Well, the concerns would be iron (probably iron II =  Fe++ = Fe(II) = ferrous ion), sulfate ion, and any residual acid (hydrogen ion).  

Acid is the acute concern:  It can ruin plumbing and mess up septic systems.  Acid can easily be neutralized over marble chips, with baking soda or with washing soda (which is present in dishwasher detergent powder).  Neutralizing the waste may also largely precipitate the iron sulfate/calcium carbonate mixture, allowing it to be filtered or decanted off.

Iron is not an environmental pollutant.

Sulfate is probably not an environmental pollutant, and we're not talking about great quantities of the stuff.  Remember that this chemical is intended for use in swimming pools.

So, without bothering to read up on the subject, my impression is that if you neutralize the acid, and remove the solids for disposal as trash, the remaining neutral liquid could be poured down the drain or even on the garden (iron is a nutrient).

Bruce
NJ

>>> jonned at hvc.rr.com 2/23/2006 4:04:15 PM >>>
Question for Bruce, or anyone else, what considerations are there for 
clean-up/disposal of the sodium bisulfate solution when it is depleted.

Jon Nedbor 


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