Environmental Chemistry 4/22/2017 APHY101

Environmental Chemistry The Carbon Cycle 4/22/2017 APHY101

Environmental 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 Catalytic converter 4/22/2017 APHY101

Environmental Chemistry Air Pollution Industrial Smog Sulfur oxides (SO2 and SO3) Smelters that produce Cu, Zn, Pb Coal burning SO2 + O2 → SO3 SO3 + H2O → H2SO4 4/22/2017 APHY101

Environmental Chemistry 4/22/2017 APHY101

Environmental Chemistry 4/22/2017 APHY101

Environmental Chemistry 4/22/2017 APHY101

Environmental Chemistry Purifying Our Water Remove dirt and bacteria Boiling, iodine tablets or UV light Aerate to remove odors and improve taste 4/22/2017 APHY101

Environmental 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 4/22/2017 APHY101

Environmental Chemistry Desalination 4/22/2017 APHY101

Wastewater Treatment Plant in Prichard, Alabama 4/22/2017 APHY101

180 MGD Wastewater Treatment Plant in Baltimore, Maryland 4/22/2017 APHY101

Environmental 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 4/22/2017 APHY101

Environmental Chemistry 4/22/2017 APHY101

Environmental Chemistry 4/22/2017 APHY101