Page 191 - Soil and water contamination, 2nd edition

178 Soil and Water Contamination

c. If reduced lake bed sediment contaminated by PAHs is exposed to air, what does this
mean for the adsorption of PAHs in the sediment?

5. Describe the effect of halogens in organic compounds on:
a. Water solubility
b. Environmental persistence
6. Name three POPs that are ubiquitous in the global environment and give their main
sources.

7. What is the principal source of environmental contamination by aliphatic chlorinated
hydrocarbons?

8. What is the main physical property that determines the difference in environmental
behaviour of aliphatic chlorinated hydrocarbons and BTEX in groundwater?

9. Describe in brief the fate of PCBs and dioxins released into stream water.
10. Name three emerging substances of concern and give their main sources.

11. What are the main sources of microplastics in aquatic ecosystems?

10/1/2013 6:44:40 PM
Soil and Water.indd 190 10/1/2013 6:44:40 PM
Soil and Water.indd 190