Phytoremediation
Our goal is to remediate the soil of lead and other heavy metals and decrease exposure to children in Atlanta. In order to accomplish this, we are using plants whose seeds are easily accessible to the community, grow well in Georgia, and are cost effective. We are currently growing plants for fall and winter, and will adjust plants as the seasons change.
Plants can "clean" soil by absorbing trace metals and metalloids, preventing harmful contaminants from leaking into nearby water sources, being kicked up into the air and/or being inhaled. Plants particularly good at extracting heavy metals are called hyperaccumulators (1). Some examples are sunflowers, kale, and carrots.
Bioavailability
Bioavailability is the amount of a substance (like heavy metals) that gets into the bloodstream after ingesting it. In other words, it is the percentage that could actually cause harm.
We measure bioavailability in the lab by putting the soil samples in a fake stomach and intestine, then measure the concentration of heavy metals. This gives us a much better estimate of the potential health effects than by just measuring the soil alone.
Slag
Slag is a solid waste from production of a metal, such as steel. It can contain heavy metal contaminants, such as lead. If disposed of improperly, slag contaminants can negatively impact soil and community health.
If you see slag in your neighborhood, please contact us for sampling and cleanup options.
