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16 new Pollution.pdf.edu

# 16 new Pollution.pdf.edu - Environmental Pollution Air...

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1 Environmental Pollution Water Pollution Air Pollution Land Pollution Pollution Undesirable or detrimental levels of various substances in air, water, or soil. Units of pollution measurement percent = parts per 100 parts ppm = parts per 1,000,000 parts ppb = parts / 1,000,000,000 parts ppt = parts / 1,000,000,000,000 parts

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2 Units of pollution measurement percent = parts per 100 parts ppm = parts per 1,000,000 parts Units of pollution measurement ppm = parts per 1,000,000 parts ppm (w/w)= mg/1,000,000 mg = mg/kg Water quality workers often use the unit mg/L (1000 cm 3 /L)x(1 g/cm 3 )x(1 kg/1000 g) =1 kg/L water One liter of water has a mass of one kg, therefore: mg/L (water) = mg/kg = ppm Units of pollution measurement ppm = parts per 1,000,000 parts ppm (v/v)= cm 3 /1,000,000 cm 3 Concentrations of gases in air are reported on a volume/volume basis. Units of pollution measurement ppm = parts per 1,000,000 parts ppm (v/v)= cm 3 /1,000,000 cm 3 Concentrations of gases in air are reported on a volume/volume basis. A cubic meter: 100cm 100cm 100cm Problem 1. Sea water contains 3.5% salt. What is the concentration in mg/L?
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