environmental chemistry 9/14/2015aphy1011. environmental chemistry the carbon cycle...

Environmental ChemistryEnvironmental Chemistry

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Environmental ChemistryEnvironmental Chemistry The Carbon Cycle

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Environmental ChemistryEnvironmental Chemistry Air Pollution

Carbon Monoxide• 80% from natural sources• 20% from automobile combustion (urban

problem)

Photochemical Smog• Nitrogen Oxide from automobile combustion• Nitrogen Dioxide forms Ozone NO2 + sunlight → NO + O

O + O2 → O3

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Environmental ChemistryEnvironmental Chemistry Air Pollution

Industrial Smog• Sulfur oxides (SO2 and SO3)

• Smelters that produce Cu, Zn, Pb• Coal burning

SO2 + O2 → SO3

SO3 + H2O → H2SO4

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Environmental ChemistryEnvironmental Chemistry

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Environmental ChemistryEnvironmental Chemistry

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Environmental ChemistryEnvironmental Chemistry

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Environmental ChemistryEnvironmental Chemistry Purifying Our Water

Remove dirt and bacteria• Boiling, iodine tablets or UV light

Aerate to remove odors and improve taste

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Environmental ChemistryEnvironmental Chemistry Desalination

Removing salt from seawater or brackish groundwater

• Distillation and reverse osmosis

Osmosis – the net flow of a fluid into a more concentrated solution

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Environmental ChemistryEnvironmental Chemistry Desalination

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Wastewater Treatment Plant in Wastewater Treatment Plant in Prichard, AlabamaPrichard, Alabama

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180 MGD Wastewater Treatment Plant in 180 MGD Wastewater Treatment Plant in Baltimore, MarylandBaltimore, Maryland

Environmental ChemistryEnvironmental Chemistry Wastewater Treatment with algae

Advanced Integrated Pond Systems• Plants use waste as fertilizer• Paddlewheels aerate the waste• Sunlight disinfects the waste• Saves electricity and reduces the volume of

sludge• Plants are harvested for fuel• Example 1, 2

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Environmental ChemistryEnvironmental Chemistry

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Environmental ChemistryEnvironmental Chemistry

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