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4.4 WATER POLLUTION (Pollution sources (Marine dumping, Accidental oil…
4.4 WATER POLLUTION
Pollution sources
Marine dumping
Accidental oil spillage
Mining activities
Sewage and wastewater
Industrial waste
Chemical fertilizers and pesticides
Burning of fossil fuels
Types of aquatic pollutants
Pesticides
Oils
Toxic metals
Synthetic compounds
Suspended matter
Microbial pollution
Parameters to test water quality
Suspended soilds
Metals
Temperature
Nitrates
pH level
Phosphates
Dead zones
occurs when not enough oxygen to support marine life
Low oxyen levels
Nutrient sources
Algal bloom
Biochemical oxygen demand (BOD)
Calculating BOD
Measuring BOD
Indications
HIGH- more needed oxygen for respiration
LOW- less needed oxygen for respiration
Eutrophication
bodies of water receive inputs of nutrient
Biotic index
Types of macroinvertebrates
Semi pollution intolerant
Semi pollution tolerant
Pollution tolerant
Pollution intolerant
Biodegradation of organic materials