DIYbanter - View Single Post

wrote:

Once you fill that lye solution with zinc and cadmium salts it ain't
supposed to go down the drain, at least not anywhere in the states.

Fair 'nuff, but every bit of galvanized hardware in the US is leaching off
zinc. Slowly, but it adds up. Compared to this, a few grams from home ain't
peanuts. You're correct, of course. So suppose you dissolve some zinc into
NaOH and then neutralize it perfectly with muriatic (HCl) getting water,
zinc and salt. What do you suggest doing with this if you want to be
environmentally correct?

GWE