KVV E-Modules

1. Detoxification using bioremediation

1. MCQ and Short note type questions

Assignment on Environmental Toxicology Q. Write short note on • What is the fundamental difference between bioremediation and chemical remediation? • Distinguish between indigenous and exogenous microorganisms in waste management. • Name three environmental parameters manipulated during biostimulation. • What is the primary operational difference between in situ and ex situ bioremediation? • Under what environmental conditions is bioaugmentation preferred over biostimulation? • Explain the primary purpose of bioventing and identify the zone of soil it targets. • Define mycoremediation and name one major type of pollutant fungi can degrade. • Why can heavy metals not be degraded like organic pollutants? Q. Provide answers for given MCQ 1. What is the fundamental principle of bioremediation? A) The use of chemical agents to neutralize toxic spills B) The application of living organisms to degrade or detoxify environmental pollutants C) The mechanical separation of hazardous waste from soil D) The incineration of non-biodegradable plastics 2. Which bioremediation strategy involves the deliberate addition of specialized, exogenous microorganisms to a contaminated site to enhance pollutant degradation? A) Bioaugmentation B) Biostimulation C) Bioleaching D) Phytostabilization 3. In the context of bioremediation, what does Biostimulation refer to? A) Injecting pressurized air directly into the water table B) Introducing genetically modified bacteria to eat oil C) The addition of nutrients and oxygen to stimulate indigenous microbes D) Using plants to extract heavy metals from the soil 4. Which specific type of bioremediation relies on the use of green plants to extract, sequester, and detoxify pollutants from soil and water? A) Mycoremediation B) Bioaccumulation C) Bioventing D) Phytoremediation 5. Which of the following phytoremediation techniques uses plant roots to absorb and precipitate heavy metals from contaminated water? A) Phytovolatilization B) Rhizofiltration C) Phytodegradation D) Phytoextraction 6. What is the primary environmental factor that must be strictly monitored during bioremediation to ensure optimal enzyme activity and microbial growth? A) Atmospheric pressure B) Nitrogen levels C) Temperature and pH D) Wind speed 7. What is the key limitation of in situ bioremediation techniques compared to ex situ approaches? A) It generally requires larger land areas for excavation B) It has a higher risk of secondary pollution spreading to the atmosphere C) It relies on physically removing contaminated soil for off-site treatment D) It offers less environmental control over conditions like temperature and moisture 8. Which method is classified as an ex situ bioremediation technique? A) Bioventing B) Biosparging C) Bio-pile treatment D) Phytostabilization 9. During Bioventing, how is the degradation of contaminants primarily enhanced? A) By injecting air or oxygen into the soil to stimulate aerobic microbes B) By pumping contaminated groundwater to the surface C) By introducing hyper-tolerant fungal strains D) By raising the ambient temperature of the site using artificial heat 10. Which of the following is a common biological mechanism used by microorganisms to detoxify heavy metals in the environment? A) Photodegradation B) Biosorption C) Volatilization D) Combustion