Today I cleaned up the corrosion on the terminals of my car battery. I have a 2010 VW Jetta. I used a toothbrush and baking soda mixed with water to clean the battery terminals.
Now the terminals are clean, but my container I used for my baking soda solution now contains some bits of the corrosion from my dipping the toothbrush in there repeatedly to clean the terminals. I have mixed sufficient baking soda in the solution that any acid that remains has been neutralized. I am wondering how I should dispose of this now. With it no longer being acidic, is it safe to pour down the drain? I know car batteries often have lead in them, but I wasn't sure if this lead would transfer into the corrosion on the terminals.