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Air Pollution Source Assessment using MIMOS II

Air Pollution Source Assessment using MIMOS II. Paulo de Souza 1,2 , G. Klingelh öfer 2 , P. Gütlich 2 Tasmanian ICT Centre, CSIRO, Hobart, Australia; E-mail: paulo.desouza@csiro.au Inst. Anorg. Analytical Chemie, Universit ä t Mainz, Germany.

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Air Pollution Source Assessment using MIMOS II

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  1. Air Pollution Source Assessment using MIMOS II Paulo de Souza1,2, G. Klingelhöfer2, P. Gütlich2 Tasmanian ICT Centre, CSIRO, Hobart, Australia; E-mail: paulo.desouza@csiro.au Inst. Anorg. Analytical Chemie, Universität Mainz, Germany “Gütlich, Bill, Trautwein: Mössbauer Spectroscopy and Transition Metal Chemistry@Springer-Verlag 2009”

  2. Outlook • Motivation • Constraints in Air Pollution Source Particle assessment • Some Roadblocks • Results • Conclusions “Gütlich, Bill, Trautwein: Mössbauer Spectroscopy and Transition Metal Chemistry@Springer-Verlag 2009”

  3. Motivation Does that dust come from my company, or not? “Gütlich, Bill, Trautwein: Mössbauer Spectroscopy and Transition Metal Chemistry@Springer-Verlag 2009”

  4. Approach to a Complete Air Pollution Source Assessment • Dust source inventory • Meteorological & Air Quality Data • Dust sampling (source and receptors) • Characterization using different techniques • Modelling “Gütlich, Bill, Trautwein: Mössbauer Spectroscopy and Transition Metal Chemistry@Springer-Verlag 2009”

  5. Constraints in Airborne Particle assessment • Source Inventory (material oriented) • Inside and outside sources • Description of each source • Seasonal? • Chemical composition changes in time? • Emission factor is available? • Sampling campaign • Standards • Representative “Gütlich, Bill, Trautwein: Mössbauer Spectroscopy and Transition Metal Chemistry@Springer-Verlag 2009”

  6. Can we use MIMOS II in Outdoor Studies? Propose Approach “Gütlich, Bill, Trautwein: Mössbauer Spectroscopy and Transition Metal Chemistry@Springer-Verlag 2009”

  7. Motivation • MIMOS II performs transmission and backscattering geometries • No-sample preparation is required • Low power consumption allows long term measurements • Portable and compact • Radiation can be easily shielded “Gütlich, Bill, Trautwein: Mössbauer Spectroscopy and Transition Metal Chemistry@Springer-Verlag 2009”

  8. On MIMOS II • Weight (~ 400 g) • Vibration resistant • Power (~ 3 W) • Size (5x5x9) cm3 • Backscattering mode • Calibrations “Gütlich, Bill, Trautwein: Mössbauer Spectroscopy and Transition Metal Chemistry@Springer-Verlag 2009”

  9. Some Roadblocks • Vibrations from the sampler • Time required for a measurement depends on: • Source strength • Geometry • Amount of Dust • Fe content in the dust • Radiation • Handling the instrument • Shielding • Safety “Gütlich, Bill, Trautwein: Mössbauer Spectroscopy and Transition Metal Chemistry@Springer-Verlag 2009”

  10. Laboratory Measurement of Airborne Particles using MIMOS II “Gütlich, Bill, Trautwein: Mössbauer Spectroscopy and Transition Metal Chemistry@Springer-Verlag 2009”

  11. Dust Collected in a Chimney Measured by MIMOS II in the Laboratory “Gütlich, Bill, Trautwein: Mössbauer Spectroscopy and Transition Metal Chemistry@Springer-Verlag 2009”

  12. Different Configuration of MIMOS II in Airborne Particle Samplers “Gütlich, Bill, Trautwein: Mössbauer Spectroscopy and Transition Metal Chemistry@Springer-Verlag 2009”

  13. Simultaneous Transmission and Backscattering Measurements using MIMOS II MIMOS II in the Field P. A. de Souza Jr., et al. 94th AWMA Meeting, 2001, Sect. AB-2D, 569. “Gütlich, Bill, Trautwein: Mössbauer Spectroscopy and Transition Metal Chemistry@Springer-Verlag 2009”

  14. Larger Contribution at Ilha do Boi comes from Mineral Processing Industry MIMOS II in the Field “Gütlich, Bill, Trautwein: Mössbauer Spectroscopy and Transition Metal Chemistry@Springer-Verlag 2009”

  15. Conclusions • MIMOS II is useful in characterization of Fe-bearing compounds in particulate matter. • The analysis is automated. • Composition of the dust depends drastically from the sampling point. • Hematite is the main component of the collected dust. Subordinated phases are goethite, pyrite and ultra-fine Fe3+ particles. Traces of Fe-containing silicates, and magnetite. • Local Industry and Environmental protection agency based their investments and policy on these results. “Gütlich, Bill, Trautwein: Mössbauer Spectroscopy and Transition Metal Chemistry@Springer-Verlag 2009”

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