A soils contaminated with a heavy metal may be bioremediated by ____.
A)applying genetically engineered bacteria that can degrade the metal
B)growing and harvesting plants that take up large quantities of the toxic metal
C)burying the contaminated soil in a secure landfill
D)applying a source of carbon and nitrogen to the soil
E)all of the above

Question

Quizplus · Accepted Answer

Growing and harvesting plants that take up large quantities of the toxic metal is a process known as phytoremediation, which is a form of bioremediation. The plants absorb the contaminants through their roots and store them in their stems and leaves, which can then be harvested and properly disposed of. This is a cost-effective and environmentally-friendly method of remediation. The other options (A, C, and D) may also be used for bioremediation of contaminated soils, but growing plants is the most suitable option for heavy metals.

A Soils Contaminated with a Heavy Metal May Be Bioremediated