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EPM821S - ENVIRONMENTAL POLLUTION MONITORING AND REMEDIATION - 2ND OPP - JAN 2023 |
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nAm I BI A u n IVE RS ITV
OF SCIEn CE Ano TECHn OLOGY
FACULTY OF HEALTH, NATURAL RESOURCESAND APPLIED SCIENCES
DEPARTMENTOF NATURALAND APPLIEDSCIENCES
QUALIFICATION: BACHELOR OF SCIENCE HONOURS
QUALIFICATION CODE: 08BOSH
LEVEL: 8
COURSENAME: ENVIRONMENTAL POLLUTION,
MONITORING AND REMEDIATION
COURSECODE: EPM821S
SESSION:JANUARY 2023
DURATION: 3 HOURS
PAPER:THEORY
MARKS: 100
SUPPLEMENTARY /SECOND OPPORTUNITY EXAMINATION QUESTION PAPER
EXAMINER{S) DR JULIEN LUSILAO
MODERATOR: DR JAMES ABAH
INSTRUCTIONS
1. Answer ALL the questions in the answer book provided.
2. Write and number your answers clearly.
3. All written works MUST be done in blue or black ink.
PERMISSIBLE MATERIALS
None
ATTACHMENT
None
THIS QUESTION PAPERCONSISTSOF 4 PAGES(Including this front page)
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Question 1
[20]
1.1 Define the following properties of hazardous waste:
(a) Explosive
(2)
(b) Oxidising
(2)
(c) Harmful
(2)
(d) Infectious
(2)
1.2 The different components of a Hazard Incident Response are: Recognition,
Evaluation, Information, Safety and Control. Briefly describe the process involving
these components.
(6)
1.3 Name the main categories of waste-treatment technologies.
(6)
Question 2
[20]
2.1 Many climate experts agree that it is not possible to unambiguously separate
atmospheric compounds into distinct groups of either air pollutants or climate-
influencing gases and particles. Use different examples of known compounds to
demonstrate the air pollution and climate nexus (i.e. connection).
(5)
2.2 (a) Define Radiative Forcing Geoengineering Technologies with respect to climate
change.
(2)
(b) Describe how are the strategies in (a) achieved.
(4)
(c) Name two technologies that belong to this group.
(2)
2.3. The following questions relate to the remote sensing technique called LIDAR.
(a) What does LIDAR stand for?
(1)
(b) What is the basic principle of this analytical method?
(2)
(c) What useful information can be obtained from the atmospheric components
that are analysed through this method?
(4)
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Question 3
[20]
3.1 Define the following concepts:
(a) Water pollution
(2)
(b) Watershed
(2)
(c) Estuary
(2)
(d) True water colour
(2)
3.2 (a) Differentiate between external and internal treatments of industrial waters.
(4)
(b) Describe the process of wastewater treatment in facultative ponds (with generic
reactions).
(8)
Question 4
[20]
4.1 Briefly discuss the main sources of acid drainage (AD) generation with examples.
(6)
4.2 (a) Define the term carbonation.
(2)
(b) Write the generic chemical reaction(s) involved in the carbonation process.
(2)
(c) What are the key factors controlling the carbonation process?
(3)
4.3 (a) What are the main goals of the neutralization of acid-pyritic waste?
(2)
(b) Discuss the Anoxic Limestone Drain (ALD) process.
(5)
Question 5
[20]
5.1 (a) Define a dense phase fluid.
(2)
(b) Supercritical carbon dioxide is the most used dense phase fluid in Green
procedures. Provide the advantages of this solvent.
(5)
5.2 (a) Define a feedstock.
(2)
(b) The schematic representation below shows the major steps in obtaining and
utilising feedstock.
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:
A
","-
B
","-
C
' ,..
'f
' ,..
[
Byproducts and Environmental Effects
]
Describe the steps in A, Band C.
(3)
(c) What are the main advantage and disadvantage of biological feedstock?
(2)
5.3 (a) What was the problem with the old model of industrial production?
(2)
(b) Describe the different streams of recycled materials in industrial ecosystems.
(4)
END
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