Geology and Health_1

Geology and Health_1 - Environmental Geology Environmental...

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Unformatted text preview: Environmental Geology Environmental Geology and and Human Health Human Health Airborne lead concentration has increased during human civilization Glacial ice cores record lead levels through time Use of Lead in Gasoline • Lead added to gasoline to promote combustion since 1920’s • Lead-containing particles emitted in exhaust • Largest source of lead pollution worldwide • Phase out of leaded-gas in the US from 1975-1996 • Decline in use of leaded-gas resulted in decreased lead levels in human blood • Leaded-gas still used in many LDC Lead in Paint • Prior to 1955 most white paint contained up to 50% lead • In 1955 lead content reduced to 1%; in 1977 0.06% • 85% of homes built before 1978 have lead-based paint • As paint deteriorates, lead-containing dust is inhaled, ingested • Children at greatest risk (mental development problems) Mielke 1999 Lead abundances in New Orleans (Pre-Katrina) Urban Lead Lead in Plumbing • Historically, lead used in pipes and in solder for plumbing • Lead may dissolve from pipes/solder if water is corrosive • In 1991, EPA enacted “ Lead and Copper Rule” Environmental Aspects of Health and Disease...
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This note was uploaded on 05/13/2011 for the course GEO 101 taught by Professor Hanson during the Spring '08 term at SUNY Stony Brook.

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Geology and Health_1 - Environmental Geology Environmental...

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