Lecture 36 - Partitioning Processes (VOCs) Lecture#36...

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1 Partitioning Processes (VOCs) ± Lecture#36 ± Partitioning Processes ± VOCs and Vapor Pressure ± VOCs and Solubility ± VOCs and Air-Water Partitioning ± MSDS ± ICP #34 ± N: Ch. 3: 3.1.B-.2 (CNP: pg. 19-27) Partitioning and Water Pollution Modeling ± Just finished Airshed Pollution and Modeling ± Emission sources (stationary and mobile) ± Pollutants (CAP, Air Toxics) ± Air Quality Issues (smog, ozone depletion, global warming) ± Starting today on Water Pollution and Modeling ± Hazardous Organics (VOCs, pesticides) ± Non hazardous organics (BOD) ± Water Transport Partitioning Processes (VOCs) ± 1. What is the difference between steady state and equilibrium? ± 2. What chemical properties determine relative partitioning among phases (air, water, solid)? ± 3. How do we assess the relative amounts of mass among the different phases present? First Back to Mass Balance ± hydrologic cycle is a closed system (control volume is earth and atmosphere) ± isolating one aspect of the system would make it an open system (e.g., the sea) Mass Balance Equations ± accumulation rate = inflow rate – outflow rate + net transformation rate ± transformation: either reaction producing mass or converting mass (decaying) to another form ± conservative: no generation or decay m rxn = 0 ± steady-state: amount of mass in control volume stays constant ( dm/dt = 0) dm/dt = m in - m out +m rxn 0 0 Mass Balance Equations ± steady-state: amount of mass in control volume stays
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Lecture 36 - Partitioning Processes (VOCs) Lecture#36...

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