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1. Are these statements True or False?

- Environmental problems require the expertise of people with differing scientific backgrounds.

- There are many devices on the market which can be used to solve all kinds of air and water problems.

- Liquid wastes can be largely recycled after treatment.

- Mining industry is no longer allowed to leave the land surface in a disturbed condition.

- The highest proportion of atmospheric pollutants produced by man comprises carbon monoxides.

- 30 % of air pollutants have natural causes.

- Regulations are concerned with emissions into the atmosphere of gases rather than solids.

- Limestone slurries and caustic solutions are used to control sulphur oxide gas emissions.

- Useful by-products can be obtained by treating gas streams from modern copper smelting operations.

- New methods of producing copper by chemical means have been highly successful.

2. Classify the following items into four lists according to their role in environmental engineering. Then find a heading for each list.

Electrolytic grade copper Liquid sulphur dioxide

Electrostatic precipitator Hydrocarbons

Electrowinning Hydrometallurgical plant

Fabric arrester Nitrogen oxide gases

Flash furnace Sulphur dioxide gas

Liquid ion exchange Sulphuric acid

3. Discuss the following points.

- Why do you think air quality management is important?

- What kinds of air pollution are found in your area? What could be done to control them?

Johnson C.N. & D. General Engineering. Prentice Hall, Europe, 1998.

12. 9 You will hear a lecture on impact of some trace elements of ore mineral on the environment. For questions 1-5, choose the best answer a, b, or c.

  1. Weathering of the ore minerals results in

a) release of trace elements

b) release of major ore elements

c) release of trace and major elements.

2.The sulphide ore minerals represent the most serious threat of

environmental contamination because

a) they are easily oxidised

b) environment can be seriously impacted

c) they produce considerably more soluble sulphates

3. A particular problem concerning weathering of sulphide minerals is

a) iron sulphides

b) pyrite

c) marcasite

4. Ochre is

a) oxides and hydroxides

b) oxidation products

c) iron sulphides

5. Acid mine drainage is

a) oxidation process

b) acidic solutions

c) resultant runoff from mines

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