lecture_22 - LECTURE 22 - ENVIRONMENTAL ISOTOPES 21.1...

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LECTURE 22 - ENVIRONMENTAL ISOTOPES 21.1 ENVIRONMENTAL ISOTOPES PROTEUM 99.984% STABLE DEUTERIUM 0.016% STABLE TRITIUM 10 UNSTABLE (12.3YRS) -18 OXYGEN 16 99.76% STABLE OXYGEN 17 0.04% STABLE OXYGEN 18 0.02% STABLE OXYGEN 19 - UNSTABLE CARBON 12 98.89 STABLE CARBON 13 1.11 STABLE CARBON 14 10 UNSTABLE -10 CHLORINE 36 UNSTABLE RADON 222 UNSTABLE STRONTIUM 90 AND 89 CESIUM 137
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21.2 CIRCULATION OF O AND D IN THE HYDROLOGIC 18 CYCLE FRACTIONATION OF O AND D 18 CONTROLLED BY: BIOLOGICAL ACTIVITY CHEMICAL AND EXCHANGE PROCESSES PHYSICAL EFFECTS MOST IMPORTANT FRACTIONATING EFFECT IN WATER IS DIFFERENCES IN VAPOR PRESSURE BETWEEN WATER MOLECULES H O, HD O, AND 2 18 16 H O 2 16 FOR EXAMPLE AT STP k H O/ k HDO = 1.08 2 k H O/ k H O = 1.009 2 2 16 18 FRACTIONATION IS ALSO EFFECTED BY TEMPERATURE RATE OF REACTION EQUILIBRIUM VS. KINETIC REACTIONS 21.3 MEASUREMENT OF O AND D 18 RATIO MASSPECTROMETRY GAS (D/H OR C O /C O ) IONIZED 18 16 2 2
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ION BEAM PASSED BY MAGNETIC FIELD RATIO DETERMINED IN ION COLLECTOR
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This note was uploaded on 07/25/2008 for the course GLG 411 taught by Professor Larson during the Fall '06 term at Michigan State University.

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lecture_22 - LECTURE 22 - ENVIRONMENTAL ISOTOPES 21.1...

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