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Which of the following is not a method of heavy metal removal from water?

(a) Adsorption

(b) Chemical precipitation

(c) Biogas

(d) Reverse osmosis

The question was posed to me in semester exam.

Enquiry is from Microbial Applications for Metal Removal topic in chapter Microbial Transformation of Heavy Metals of Environmental Biotechnology

1 Answer

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Best answer
The correct choice is (c) Biogas

The explanation: Biogas is the end product of sewage treatment when methane gas is produced, it is not used for heavy metal removal from water. Whereas, adsorption, chemical precipitation, reverse osmosis and solvent extraction is used for heavy metal removal from water.

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