Podcast
Questions and Answers
What is biosorption?
What is biosorption?
- The breakdown of heavy metals by microbial cells.
- The release of heavy metals into aqueous solutions.
- The selective sequestering of heavy metals by living microbes.
- The binding and concentration of heavy metals from aqueous solutions by microbial biomass. (correct)
Which countries consume about 75% of the world's most widely used metals?
Which countries consume about 75% of the world's most widely used metals?
- Germany, Brazil, France
- United States, Germany, Russia (correct)
- India, China, Japan
- United Kingdom, Canada, Australia
What specific gravity must a chemical element have to be classified as a heavy metal?
What specific gravity must a chemical element have to be classified as a heavy metal?
- $\geq 3$ times the specific gravity of water
- $\geq 2$ times the specific gravity of water
- $\geq 7$ times the specific gravity of water (correct)
- $\geq 10$ times the specific gravity of water
When do heavy metals become toxic?
When do heavy metals become toxic?
Which of the following symptoms is NOT associated with heavy metal toxicity?
Which of the following symptoms is NOT associated with heavy metal toxicity?
Once dispersed in the biosphere, why are toxic metals said to be permanent in terms of environmental effects?
Once dispersed in the biosphere, why are toxic metals said to be permanent in terms of environmental effects?
What is the main function of biosorption in the context of heavy metals?
What is the main function of biosorption in the context of heavy metals?
Why do heavy metals become toxic when they accumulate in the soft tissues?
Why do heavy metals become toxic when they accumulate in the soft tissues?
Which of the following elements is NOT classified as a heavy metal?
Which of the following elements is NOT classified as a heavy metal?
What is the specific gravity range of heavy metals compared to water?
What is the specific gravity range of heavy metals compared to water?
Why are the environmental effects of metal pollution considered permanent?
Why are the environmental effects of metal pollution considered permanent?
Which of the following symptoms is commonly associated with heavy metal toxicity?
Which of the following symptoms is commonly associated with heavy metal toxicity?
In which process do toxic metals like Chromium and Zinc cause environmental concerns?
In which process do toxic metals like Chromium and Zinc cause environmental concerns?
