Question

Which of the following metals is NOT explicitly mentioned as a heavy metal posing a significant threat due to toxicity?

• A. Mercury (Hg)
• B. Cadmium (Cd)
• C. Lead (Pb)
• D. Iron (Fe)

Answer 1

Answer:

D. Iron (Fe)

• Heavy metal contamination which poses a serious threat to living organisms of aquatic and soil ecosystems.

• Heavy metals are a distinct group of metals that possess comparatively high densities, atomic numbers, and atomic weights within the periodic table.

• Heavy metals such as mercury (Hg), cadmium (Cd), lead (Pb), chromium (Cr), and arsenic (As) are considered to pose a significant threat to untargeted living entities due to their toxicity character, even at low concentrations.

• Heavy metals are released into the environment from various sources including mining, urbanization, chemical industry, sewage plants, pesticide plants, biomedical and unsafe agricultural practices.