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Marijuana users found to have lead and another heavy metal in their blood and urine
(www.nbcnews.com)
this post was submitted on 30 Aug 2023
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So does that mean we could use hemp as a fiber replacement in places with contaminated soil?
Yes.
It's called phytoremediation. Hemp is an insanely cool plant. The issues with phytoremediation are:
time consuming; you got to wait for the plants to grow
generally only a few metals are taken up by a given spp., so application is limited and depends on metals present and plants growing conditions and the metals they uptake intersecting
you then have to harvest the plants and dispose of them in a landfill, which means you have to truck them.
Generally, during soil remediation projects they just excavate the soil and landfill it. They then bring in clean soil or use organic amendments to improve the subsoil horizons to the point they can support plants
Why would you need to send it to a landfill, and release the chemicals there as the plant decays, when you could just make stuff out of it.
Because the chemicals and metals are not biostable, and you would be creating further contamination pathways.
Landfills are designed to not release anything into the environment.
That may or may not happen in reality, but there is an attempt.