Phytoremediation and Environmental Phytotechnologies
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Questions and Answers

What is the estimated transpiration rate of a five-year-old poplar tree?

  • 50 liters per day
  • 500 liters per day
  • 100 liters per day (correct)
  • 200 liters per day

    • Which of the following plants is NOT mentioned as a phytoremediation species?

  • Maple (Acer spp.)
  • Willow (Salix spp.)
  • Oak (Quercus spp.) (correct)
  • Lotus spp.

    • What is an advantage of phytotechnology compared to conventional methods?

  • It is more expensive
  • It is cost-effective (correct)
  • It requires more land disturbance
  • It is more intrusive to the environment

    • What is the benefit of hyperaccumulators in phytoremediation?

    <p>They reduce the volume of toxic waste</p> Signup and view all the answers

    Which of the following is NOT a type of plant mentioned in the text?

    <p>Mosses</p> Signup and view all the answers

    What is the estimated transpiration rate of a willow tree?

    <p>200 liters per day</p> Signup and view all the answers

    What is phytoremediation?

    <p>A plant-based approach to extract and remove elemental pollutants or lower their bioavailability in soil</p> Signup and view all the answers

    Why are plant-based treatments preferred over rival systems?

    <p>They are considerably cheaper than rival systems</p> Signup and view all the answers

    What is an advantage of using phytotechnology to remove contaminants?

    <p>Multiple contaminants can be removed with the same plant</p> Signup and view all the answers

    What is a crucial factor in selecting a species for phytoremediation?

    <p>The plant's ability to survive in contact with the contamination</p> Signup and view all the answers

    How many species are considered suitable for use as phytoremediators?

    <p>Over 400 different species</p> Signup and view all the answers

    What is a disadvantage of using Terrestrial Phyto-Systems (TPS) in winter months?

    <p>Decrease in action during winter months when trees are dormant</p> Signup and view all the answers

    What is one way that some plants act as phytoremediators?

    <p>By accumulating contaminants within the plant biomass</p> Signup and view all the answers

    What is a concern with contaminated plants entering the food chain?

    <p>Possibility of contaminated plants entering the food chain</p> Signup and view all the answers

    Why is EPA approval necessary for phytotechnology procedures?

    <p>Much testing is needed before a procedure can be utilized</p> Signup and view all the answers

    What is a beneficial effect of some phytoremediators on their environment?

    <p>Encouraging localized microbial growth</p> Signup and view all the answers

    What is a difference between Aquatic Phyto-Systems (APS) and Terrestrial Phyto-Systems (TPS)?

    <p>APS is used for water contaminants, TPS is used for soil contaminants</p> Signup and view all the answers

    What is a concern with the disposal of plant biomass in phytotechnology?

    <p>It can be hazardous and regulated by RCRA</p> Signup and view all the answers

    What is the effect of mycorrhiza fungi on the absorption area of plants?

    <p>It increases the absorption area by up to 1000 times</p> Signup and view all the answers

    Why is it important to work with contamination tolerant mycorrhiza or use additional measures like inoculation with bacteria?

    <p>To prevent high concentrations of contaminants from killing mycorrhiza</p> Signup and view all the answers

    What is the primary factor that influences the duration of remediation in phytotechnology?

    <p>Growth rate</p> Signup and view all the answers

    Which of the following is NOT a factor that influences root depth in plants?

    <p>Plant species</p> Signup and view all the answers

    What is the advantage of rapid growth in terms of root depth for rhizodegradation, rhizofiltration, and phytostabilization?

    <p>It allows for faster remediation</p> Signup and view all the answers

    Which process is more influenced by the growth rate of aboveground biomass?

    <p>Phytodegradation</p> Signup and view all the answers

    What is the primary goal of phytostabilization?

    <p>To immobilize pollutants, reducing their bio-availability and preventing their migration off site</p> Signup and view all the answers

    What is the importance of phytostabilization for exposed sites?

    <p>Minimizing the effects of wind erosion</p> Signup and view all the answers

    What is the role of the rhizosphere in phytostabilization?

    <p>To accumulate and contain pollutants</p> Signup and view all the answers

    What is the advantage of using rapid-growth plants for rhizofiltration?

    <p>They can remove toxic metals from solution over an extended period of time</p> Signup and view all the answers

    What is the importance of acclimatizing plants to the specific character of the water to be treated?

    <p>To ensure the plant can remove toxic metals effectively</p> Signup and view all the answers

    What is the limitation of phytostabilization in terms of metal removal?

    <p>Metals do not ultimately degrade, so holding them in place is the best option</p> Signup and view all the answers

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