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Which of the following is not a potential metal biosorbents?

(a) Algae

(b) Bacteria

(c) Fungi

(d) Nitrifying bacteria

I have been asked this question in an internship interview.

Enquiry is from Biological Removal, Biotransformation and Biosorption of Metal Ions from Contaminated Wastewater topic in portion Bacterial Metabolism in Wastewater Treatment Systems of Environmental Biotechnology

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The correct answer is (d) Nitrifying bacteria

Explanation: Explanation: Algae, Fungi, bacteria and yeasts are potential metal biosorbents because of their adsorbent properties sorption to the heavy metals, Nitrifying bacteria oxidizes inorganic nitrogen compounds resulting in the formation of nitrate.

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