I have searched, found similar questions but none answer my specific need.
I have built a raised garden bed to grow vegetables (ironically due to a high lead content in our garden soil - planning to put new, lead-free soil in the raised bed).
I used galvanised corrugated steel panels for the sides. I believe any zinc leaching would be beneficial, not a hazard.
However, now I learn that the galvanising process often involves lead. When something is "hot-dipped", apparently adding lead to the process helps the zinc run off. My understanding is limited. A crude 3M home swab test indicates lead, possibly a high content (it went very dark red). https://en.wikipedia.org/wiki/Hot-dip_galvanization https://galvanizeit.org/knowledgebase/article/why-is-lead-added-to-the-galvanizing-bath
My chemistry isn't very good, which is why I came to the experts. Here are my concerns:
- How much lead would be likely to leach into the soil?
- Would this lead be in a form that could be absorbed by lead-absorbing plants (e.g. lettuce)?
- Would this lead be in a form that might endanger small children "helping" with the vegetables?
- Would this lead be in a form that might be absorbed by the body when eating these vegetables, if not carefully washed?
Thanks in advance!