Question

What does physical method of treatment of contaminated materials include?

(a) Microorganisms

(b) Concentration and excavation

(c) Toxic compounds

(d) Ethidium bromide

The question was asked in a job interview.

This key question is from Introduction on Management Steps for Problem Soil Remediation in division Management and Remediation of Problem Soil of Environmental Biotechnology

Answer 1

Right answer is (b) Concentration and excavation

To elaborate: Concentration and excavation is a physical method of treatment of contaminants, use of microorganisms is a biological method of treatment which is based on the activity of biological compounds, Ethidium bromide is carcinogenic, toxic compounds are not cost effective and also, harmful to the environment.