aim: what are some inorganic pollutants that can contaminate our water? dn: what are toxic...
Post on 27-Dec-2015
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AIM: What are some inorganic pollutants that can contaminate our water?
DN: What are toxic chemicals? How do they get into our drinking water?
HW: Article due Friday
Inorganic Chemicals
• Metals, salt, minerals
• Enter water as a result of seepage, runoff, direct discharge from rivers, lakes, streams
Arsenic• Natural deposits and
Runoff from agriculture and industry
• Odorless and tasteless• Symptoms:
– Skin lesions– Gastrointestinal upset– cancer
Copper• Natural deposits and
corrosion of plumbing
• Symptoms:– Short term:
gastrointestinal upset– Long term: kidney
and liver
Lead
• Behavioral problems and learning disabilities in young children
• Plumbing systems
• 1986- ban of lead in pipes
Mercury Poisoning“Mad hatters disease”
• Common to hat makers
• caused tremors, nerve damage, insanity, lack of coordination
• biomagnification of mercury
Metal Drums filled with factory waste
• Drums eventually begin to corrode causing the waste to seep into groundwater
Oil Spills• Oil spills: kills many organisms,
upsets the ecosystem
– 1989- Exxon Valdez Oil Spill in the Prince William Sound
– 2010- Deep Water Horizon oil spill in the Gulf of Mexico
• Cat Island
• BP Oil Spill timeline
1. What are toxic chemicals?2. What is the difference between organic and
inorganic chemicals?3. What are heavy metals? Give some examples
of heavy metals.4. How do heavy metals enter the water
systems?5. What are some health risks associated with
heavy metals?6. Identify some examples of organic pollutants.7. Why are oil spills dangerous to water
ecosystems?
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