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Lecture 4

EARTHSC 2WW3 Lecture 4: Class 4

4 Pages
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Department
Earth Sciences
Course Code
EARTHSC 2WW3
Professor
johnmaclachlan

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More on pollution
Agriculture
o Arable and livestock
o Sediment produced
o Nitrogen/phosphorus highly mobile
Used in laundry detergent
Pesticide
Creates algae build up
o If surface water is polluted, its still okay and relatively easy to clean.. Ground water, no you
are talking about millions of dollars
Water Chemistry - Nutrients
Nitrogen
o important plant nutrient
o exists in atmosphere (78% of total volume)
o Nitrate created by lightning, bacteria
o Nitrite created by bacteria
o Ammonia is a by-product of decaying plant tissue
o excessive amounts can be detrimental to human health
Phosphorus
o can be natural or artificial
o can be a hindrance in water treatment plants
Large amounts of all of this can be detrimental to health, but we are more concerned about how it
affects water
Eutrophication
moving from a oligtrophic to mesotrophic to eutrophic
L. Superior is Oligtrophic
o Lots of nutrients
Tobermory eutrophic
o You can see 30 feet down
natural process humans impact
more likely to happen in standing water
Nitrate from wastewater treatment plans can assist in process
http://www.youtube.com/watch?v=UGqZsSuG7ao
Water Chemistry
All surface water contains
o Dissolved substances
Dissolved ions
Sum of all dissolved solutes plus silicais the TDS
Suspended substances (aka suspended sediment)
o Usually 0.004mm to 1.0mm
o Where does it come from?
o Kill animal life. Through turbidity? Turbidity: depth of visibility
Inorganic and organic substances
o Sand, cilica, rocks, animal waste
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Description
More on pollution Agriculture o Arable and livestock o Sediment produced o Nitrogenphosphorus highly mobile Used in laundry detergent Pesticide Creates algae build up o If surface water is polluted, its still okay and relatively easy to clean.. Ground water, no you are talking about millions of dollars Water Chemistry Nutrients Nitrogen o important plant nutrient o exists in atmosphere (78 of total volume) o Nitrate created by lightning, bacteria o Nitrite created by bacteria o Ammonia is a byproduct of decaying plant tissue o excessive amounts can be detrimental to human health Phosphorus o can be natural or artificial o can be a hindrance in water treatment plants Large amounts of all of this can be detrimental to health, but we are more concerned about how it affects water Eutrophication moving from a oligtrophic to mesotrophic to eutrophic L. Superior is Oligtrophic o Lots of nutrients Tobermory eutrophic o You can see 30 feet down natural process humans impact more likely to happen in standing water Nitrate from wastewater treatment plans can assist in process http:www.youtube.comwatch?v=UGqZsSuG7ao Water Chemistry All surface water contains o Dissolved substances Dissolved ions Sum of all dissolved solutes plus silicais the TDS Suspended substances (aka suspended sediment) o Usually 0.004mm to 1.0mm o Where does it come from? o Kill animal life. Through turbidity? Turbidity: depth of visibility Inorganic and organic substances o Sand, cilica, rocks, animal waste
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