Transcript Water Pollution

Water Pollution
TIC-TAC-TOE Review Game
Directions: You and your partner select 9
vocabulary terms from the list below and write
them in the Tic-Tac-Toe boxes.
Point Source
Phosphate (PO43¯)
Dead Zone
Nitrate (NO3¯)
Infectious Agents
Indicator species
Nonpoint Source
Thermal
Eutrophication
Biomagnification
Heavy Metals
Biochemical oxygen demand (BOD)
Phosphate (PO43¯)
This nutrient is needed for plants to build
nucleic acids (DNA)
Indicator species
A species that indicates the whether or not
disease-causing pathogens are likely present
in a body of water
Point Source
any single identifiable source of pollution from
which pollutants are discharged
Biomagnification
The increase of a chemical concentration in
animal tissues as the chemical moves up the
food chain
Nonpoint Source
Eutrophication
BOD (Biochemical Oxygen Demand)
The amount of oxygen a quantity of water
uses over a period of time at specific
temperatures
Heavy Metals
Cause cancer, disrupt immune system and
some act as endocrine disruptors
Infectious agents
Cause disease
Dead Zone
An area with an extremely low level of
oxygen concentration and very little life
Point Source
Phosphate (PO43¯)
This nutrient is insoluble in water; it is only
returned to land through guano
Biomagnification
Fat soluble chemicals; examples include:
DDT
Hg (Mercury)
PCBs
Agent orange
Indicator species
Fecal coliform bacteria are generally
harmless and live in the intestines of humans
and other animals. Tests can be preformed
to determine if a body of water has potentially
been contaminated with sewage
Nonpoint Source
Examples include the following:
1.) Sediments from nearby land
2.) Bacteria and microorganisms
3.) Nutrients (from fertilizers and yard debris)
and pesticides from agricultural areas, golf
courses, athletic fields and residential yards
4.) Oil, grease, antifreeze washed from roads,
parking lots and driveways
5.) Toxic chemicals and cleaners
6.) Litter
Eutrophication
The process by which a body of water acquires
a high concentration of nutrients, especially
phosphates and nitrates. These typically
promote excessive growth of algae.
Heavy Metals
Examples include:
Lead
Mercury
Arsenic
Infectious agents
Bacteria
Viruses
Protists
Parasites
Dead Zone
Zone of Hypoxia in the Gulf of Mexico
Nitrate (NO3¯)
This nutrient is needed by plants to build
proteins and nucleic acid (DNA)
BOD (Biochemical Oxygen Demand)
Low values indicate that a body of water is
less polluted by wastewater and higher
values indicate that a body of water is more
polluted by wastewater
Point Source
Examples include:
discharges from wastewater treatment
plants
operational wastes from industries
combined sewer outfalls
Nonpoint Source
does not come from a specific source.
Instead, it originates from many places, or
from a widespread area.
Eutrophication
Remediation includes:
• Removal of excess weeds
• Pumping oxygen into the water
• Using herbicides and algaecides go control
unwanted populations
• Preventing excess nutrients from entering
waterways
• Removing nitrates and phosphates from
wastewater in advanced treatment plants
Infectious agents
The only sources:
Human waste (sewage runoff)
Animal waste
Heavy Metals
Major sources include:
Unlined landfills
Household chemicals
Mining refuse
Industrial discharge
Indicator species
Because of their thin skin, amphibians absorb
many pollutants in their aquatic environment.
The health of amphibians usually means the
aquatic ecosystem is also healthy and free of
pollutants
BOD (Biological Oxygen Demand)
The point marked “X”
on the graph
indicates the body of
water has a high level
of
X
Phosphate (PO43¯) or Nitrate (NO3¯)
This nutrient is considered to be a limiting
factor to aquatic plants
Biomagnification