A lifestyle-based scenario for U.S. buildings: Implications for energy use

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Dynamic measures of air and vegetation concentrations in an exposure chamber and a two-box mass balance model are used to quantify factors that control the rate and extent of chemical partitioning between vegetation and the atmosphere. A continuous stirred flow-through exposure chamber was used to investigate the gas-phase transfer of pollutants between air and plants. A probabilistic two-compartment mass-balance model of plant/air exchange within the exposure chamber was developed and used with measured concentrations from the chamber to simultaneously evaluate partitioning (K{sub pa}), overall mass transfer across the plant/air interface (U{sub pa}) and loss rates in the atmosphere (R{sub a}) ... continued below

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35 pages

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Diamond, Rick January 1, 2003.

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Dynamic measures of air and vegetation concentrations in an exposure chamber and a two-box mass balance model are used to quantify factors that control the rate and extent of chemical partitioning between vegetation and the atmosphere. A continuous stirred flow-through exposure chamber was used to investigate the gas-phase transfer of pollutants between air and plants. A probabilistic two-compartment mass-balance model of plant/air exchange within the exposure chamber was developed and used with measured concentrations from the chamber to simultaneously evaluate partitioning (K{sub pa}), overall mass transfer across the plant/air interface (U{sub pa}) and loss rates in the atmosphere (R{sub a}) and aboveground vegetation (R{sub p}). The approach is demonstrated using mature Capsicum annuum (bell pepper) plants exposed to phenanthrene (PH), anthracene (AN), fluoranthene (FL) and pyrene (PY). Measured values of log K{sub pa} (V{sub [air]}/V{sub [fresh plant]}) were 5.7, 5.7, 6.0 and 6.2 for PH, AN, FL and PY, respectively. Values of U{sub pa} (m d{sup -1}) under the conditions of this study ranged from 42 for PH to 119 for FL. After correcting for wall effects, the estimated reaction half-lives in air were 3, 9 and 25 hours for AN, FL and PY. Reaction half-lives in the plant compartment were 17, 6, 17 and 5 days for PH, AN, FL and PY. The combined use of exposure chamber measurements and models provides a robust tool for simultaneously measuring several different transfer factors that are important for modeling the uptake of pollutants into vegetation.

Physical Description

35 pages

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OSTI as DE00841094

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  • Journal Name: Energy Policy; Journal Volume: 31; Journal Issue: 12; Other Information: Submitted to Energy Policy: Volume 31, No.12; Journal Publication Date: 09/2003

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  • Report No.: LBNL--50969
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 841094
  • Archival Resource Key: ark:/67531/metadc781938

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  • January 1, 2003

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • April 4, 2016, 1:29 p.m.

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Diamond, Rick. A lifestyle-based scenario for U.S. buildings: Implications for energy use, article, January 1, 2003; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc781938/: accessed June 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.