Steven’s Institute of Technology
CIESE
SaGE Project Water Module
Contaminant Removal Quiz
Student Name:
Period Number:
Work as a team and complete the quiz.
Fill in the correct answer from the word bank to complete the statements below.
Deionization Method
Distillation Method
Filtration Method
Reverse Osmosis Method
Settling Method
Ultrafiltration Method
UV Radiation Method
1. The _______________________ can be used before the purification process begins. Some
contaminants, such as oil, can be removed easily, after they have reached the bottom of the
tank.
2. The _______________________ can be use as an effective viricide and bactericide.
Disinfection using this method is commonly used in wastewater treatment applications and is
finding an increased usage in drinking water treatment. Many bottlers of spring water use this
method equipment to sterilize their water.
3. The _______________________ is the act of putting a fluid flow through a medium that the
fluids can pass while the solids cannot.
4. The _______________________ uses a membrane designed to allow only water to pass
through this dense layer while preventing the passage of solutes (such as salt ions). This
process requires that a high pressure be exerted on the high concentration side of the
membrane.
5. The _______________________ uses hydrostatic pressure to force a liquid against a semipermeable membrane. Suspended solids and solutes of high molecular weight are retained,
while water and low molecular weight solutes pass through the membrane
6. The _______________________ is “a physical process which uses specially-manufactured
ion exchange resins which bind to and filter out the mineral salts from water.”
7. The _______________________ is effective in disinfecting water and in the removal of
inorganic contaminants. This method is a two-step process. The process begins by boiling
water in a chamber to produce steam. In the second step, the steam is moved to a second
chamber where it is condensed back to liquid water. The water is than stored until needed.
ContamRemovPrePostTest.doc
Steven’s Institute of Technology
CIESE
SaGE Project Water Module
Contaminant Removal Quiz
What are the following methods capable of removing from the water? Be very specific.
1. Activated Carbon Filters
2. Deionization Method
3. Distillation Method
4. Filtration Method
5. Reverse Osmosis Method
6. Settling Method
7. Ultrafiltration Method
8. UV Radiation Method
9. Flocculation process
What methods and in what order would you use the methods to remove lead, suspended
solids and motor oil from the same water?
ContamRemovPrePostTest.doc
Steven’s Institute of Technology
CIESE
SaGE Project Water Module
Contaminant Removal Quiz
Student Name:
Period Number:
Fill in the correct answer to complete the statements below.
Deionization Method
Filtration Method
Reverse Osmosis Method
Settling Method
Ultrafiltration Method
UV Radiation Method
1. The Settling Method can be used before the purification process begins. Some contaminants,
such as oil, can be removed easily, after they have reached the bottom of the tank.
2. The UV Radiation Method can be use as an effective viricide and bactericide. Disinfection
using this method is commonly used in wastewater treatment applications and is finding an
increased usage in drinking water treatment. Many bottlers of spring water use this method
equipment to sterilize their water.
3. The Filtration Method is the act of putting a fluid flow through a medium that the fluids can
pass while the solids cannot.
4. The Reverse Osmosis Method uses a membrane designed to allow only water to pass
through this dense layer while preventing the passage of solutes (such as salt ions). This
process requires that a high pressure be exerted on the high concentration side of the
membrane.
5. The Ultrafiltration Method uses hydrostatic pressure to force a liquid against a semipermeable membrane. Suspended solids and solutes of high molecular weight are retained,
while water and low molecular weight solutes pass through the membrane
6. The Deionization Method is “a physical process which uses specially-manufactured ion
exchange resins which bind to and filter out the mineral salts from water.”
What do each of the following methods capable of removing from the water?
1. Activated Carbon Filters are effective in removing organic contaminants from water.
Organic chemical contaminants include synthetic and volatile organic chemicals that are
byproducts of industrial processes and petroleum production. Organic chemical contaminants
can also come from gas stations, urban storm water runoff, and septic systems.
2. Deionization Method is an excellent system for removing dissolved solids and gases. It also
removes the mineral salts from the water.
ContamRemovPrePostTest.doc
Steven’s Institute of Technology
CIESE
SaGE Project Water Module
Contaminant Removal Quiz
3. Distillation Method can remove inorganic minerals such as arsenic, lead, manganese,
uranium and most other minerals. Distillation is not effective in removing many organics
(carbon based contaminants) from water, particularly industrial solvents or hydrocarbons.
These solvents and hydrocarbons have boiling temperatures similar to that of water, and thus
will vaporize and condense just as the water does.
4. Filtration Method can be used to remove suspended solids in the water.
5. Reverse Osmosis Method is highly effective in removing several impurities from water such
as total dissolved solids (TDS), turbidity, asbestos, lead and other toxic heavy metals,
radium, and many dissolved organics. The process will also remove chlorinated pesticides
and the heavier-weight Volatile Organic Compounds (VOCs) such as such as aldehydes,
ketones, and other light hydrocarbons.
6. Settling Method is used to remove suspended solids once they have dropped to the bottom
of the tank.
7. Ultrafiltration Method is used as a germicidal treatment for water, effectively removes
most particles, pyrogens, microorganisms, and colloids above the rated size.
8. UV Radiation Method has been used widely as a germicidal treatment for water. The
adsorption of UV light by the DNA and proteins in the microbial cell results in the
inactivation of the microorganism.
9. Flocculation process causes fine particulates to clump together into floc. The floc may then
float to the top of the liquid, settle to the bottom of the liquid or can be readily filtered from
the liquid. Flocculants are used in water treatment processes to improve the sedimentation or
filterability of small particles. For example, a flocculant may be used in swimming pool or
drinking water filtration to aid removal of microscopic particles that would otherwise cause
the water to be cloudy and which would be difficult or impossible to remove by filtration
alone.
What methods and in what order would you use the methods to remove lead, suspended
solids and motor oil from the same water?
ContamRemovPrePostTest.doc