Problem 1
Describe the function of aeration in the purification of drinking water.
Problem 4
Describe how water can be disinfected by (a) membrane filtration, (b) reverse osmosis, and (c) ultraviolet irradiation.
Problem 5
Describe the two main methods used to desalinate seawater. Why is the drinking water produced by desalination relatively expensive?
Problem 6
What two other chemical methods, other than chlorination, are used to disinfect water? What are some advantages and disadvantages to these alternatives? What does DBP stand for?
Problem 7
Explain the chemistry underlying the disinfection of water by chlorination. What is the active agent in the destruction of the pathogens? What are the practical sources of the active ingredient?
Problem 8
Explain why pH control of water in swimming pools is important. What compounds are formed when the chlorinated water reacts with ammonia?
Problem 9
Discuss the advantages and disadvantages of using chlorination to disinfect water, including the nature of the THM compounds. What is "combined chlorine"?
Problem 10
Describe three important point-of-use techniques by which water can be disinfected.
Problem 11
What is meant by the terms groundwater and aquifer? How does the saturated zone of soil differ from the unsaturated zone?
Problem 17
What is the formula for the perchlorate ion? What is the origin of perchlorate ion in U.S. drinking water?
