DOCTOR
Harmless
Posts: 1
Registered: 9-6-2006
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EDTA-exhuated by Ca-salts
Dar every body:
i have on my work a lot of quantities of sol.n of exhausted EDTA by hardness,
My Q. is :Ist possible to refresh this quantity to use it again,i.e: remove the hardness then can use it agian
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unionised
International Hazard
Posts: 5102
Registered: 1-11-2003
Location: UK
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It should be possible to add acid to a concentrated solution of the Ca EDTA complex and precipitate the free acid form of EDTA which isn't very
soluble in water.
Whether or ont it is worthwhile is another matter.
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