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Using Thlaspi plants to clean zinc-contaminated soilFeatured science projectScience project video

Observation

It is observed that the level of zinc content in the soil showed a small decline after every growth cycle of the Thlaspi plant.

Contaminant Zinc content in soil (ppm)
  Initial Cycle 1 Cycle 2 Cycle 3 Cycle 4
Zinc content 598 592 584 573 565

Our results were then plotted on a graph as show below:

Thlaspi science fair project

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Complexity level:
8
Project cost ($):
180
Time required:
1 day for preparation, 120 days for observation
Material availability:
Easily obtained from a gardening supplies store. However, you will need to send your soil samples to a laboratory for testing
Safety concerns:

None