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Which of the following technique is not used to filter out heavy metals?

(a) Activated Alumina

(b) Carbon

(c) Reverse osmosis

(d) Chemical precipitation

This question was addressed to me in an internship interview.

The above asked question is from Microbial Applications for Metal Removal topic in portion Microbial Transformation of Heavy Metals of Environmental Biotechnology

1 Answer

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Right answer is (d) Chemical precipitation

Explanation: Chemical precipitation is used to remove heavy metals by use of chemicals which ultimately leads to precipitation of the heavy metals but it doesn’t filter out. Activated Alumina, Carbon and Reverse osmosis is used to filter out heavy metals.

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