Sandi Janson-Selk on fri 3 may 96
After several years of time off I am preparing to become active making pottery
again. From what I have seen on Clayart some of what I was taught before is no
longer valid; e.g. barium carbonate is safe after it is fired i cone 6 or
higher.
I have decided to substitute strontium carbonate for barium in my glaze recipes.
How can I dispose of the 5 gallon bucket full of barium carbonate with safety to
humans, other animals, plants and the ground water below? What is suggested for
disposal of other glaze chemicals? I can not use all the "crap glaze" I know I
will create again. One can use only so much high gloss green glaze!
TIA
Sandi - getting ready to relocate to South Central Oregon. The zucchini
explosion is about to happen in my garden - stand back!
!^NavFont02F026B0007NGHHI6D2B36
Sandi Janson-Selk
San Diego
70732,3440
03-May-1996 10:20:48
Mike & Donna Eyring on tue 7 may 96
>----------------------------Original message----------------------------
>After several years of time off I am preparing to become active making pottery
>again. From what I have seen on Clayart some of what I was taught before is no
>longer valid; e.g. barium carbonate is safe after it is fired i cone 6 or
>higher.
>
>I have decided to substitute strontium carbonate for barium in my glaze
>recipes.
>How can I dispose of the 5 gallon bucket full of barium carbonate with
>safety to
>humans, other animals, plants and the ground water below? What is
>suggested for
>disposal of other glaze chemicals? I can not use all the "crap glaze" I know I
>will create again. One can use only so much high gloss green glaze!
>
>TIA
>
>Sandi - getting ready to relocate to South Central Oregon. The zucchini
>explosion is about to happen in my garden - stand back!
------------------
Sandi:
My chemist hubby tells me that to safely dispose of barium carbonate
you should:
Take your 5 gallons of dry barium carbonate and add it slowly to a 10
gallon bucket of solution of 50% sulfuric acid and 50% water (be
sure to add acid to water to dilute it. NEVER add acid to water). It will
bubble a lot while you're at it, but the bubbles are carbon dioxide. No
big deal. Your carbonate should form an insoluble slurry of barium
sulphate. Just make sure your sulfuric acid mixture always stays acidic.
You may have to add sulfuric acid as you progress. Use an acid test paper
to make sure the solution stays acidic.
The barium sulfate that you end up with is the same stuff doctors use for
barium enemas and it's harmless, you can dump it in the landfill or flush
it. Just don't try to flush 15 gallons at once or you'll need an
appointment with a rotorooter guy!!!
If this sounds too complicated, donate it to your local university's
chemistry department and write it off as a donation on your tax return.
Hope this is helpful.
Donna Eyring
microfor@amug.org
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