Page 162 - Enzymes in Tropical Soils

150 Enzymes In Tropical Soils

2. Explain the effects of contaminant heavy metals on soil enzymes!
3. Explain the two important sources of heavy metals in the environment, the natural
sources and the antropogenic sources!
4. Explain the spread of contaminant heavy metals from their sources to the livig
things! Use a flow chart!
5. Explain the immobilization and screening of contaminant heavy metals in the soil
system!
6. Contaminant heavy metals are usefull at low concentrations! Explain! What about at
high concentrations?
7. Explain the toxicities of heavy metals to the living things! Compare one heavy metal
to another!
8. Explain some heavy metal related deseases: Itai-Itai, Minamata Desease, and Wilson
Desease!
9. Explain the direct effects of contaminant heavy metals on soil enzymes! Use some
heavy metal as examples!
10. Explain the indirect effects of heavy metals on soil enzymes! Use some heavy metals
for examples!
11. Explain some of the methods to decrease the solubility of contaminant heavy metals
in soils!
12. Explain the method to decrease heavy metals used in industry!
13. Explain the use of lime in lowering heavy metal solubilities in the soil system!
14. Explain the use of organic matters in lowering heavy metal solubility in the soil
system! What are functional groups? What are the effect of pH or lime on the role
of organic matters in lowering heavy metal solubility? Explain!
15. How is the interaction of lime and organic matter in lowering heavy metal solubilities
in the soil system! Use a real example!
16. Explain the methods for extracting the contaminant heavy metals from soils!
17. What are bioaccumator, bioextraction, and bioremediation? Explain!

Abdul Kadir Salam - 2014