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Which of the following doesn’t lead to toxicity of waste water?

(a) Magnesium

(b) Arsenic

(c) Lead

(d) Chromium

The question was asked during an internship interview.

I need to ask this question from Biological Removal, Biotransformation and Biosorption of Metal Ions from Contaminated Wastewater topic in division Bacterial Metabolism in Wastewater Treatment Systems of Environmental Biotechnology

1 Answer

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Right option is (a) Magnesium

The explanation is: Arsenic, lead, mercury, cadmium, chromium, copper, nickel, silver, and zinc are few toxic heavy metals that lead to toxicity of waste water causing serious health and environmental issues, Magnesium is a metal but not toxic.

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