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Determination of the chemical states of sulfur in ambient pollution aerosols by x-ray photoelectron spectroscopy
Authors:N L Craig  A B Harker  T Novakov
Affiliation:1. State Research Institute Center for Physical Sciences and Technology, Vilnius, Lithuania;2. Institute for Marine and Atmospheric Research Utrecht (IMAU), Utrecht University, The Netherlands;3. School of Physics & Ryan Institute''s Centre for Climate and Air Pollution Studies, National University of Ireland Galway, Galway, Ireland;4. Centre for Isotope Research (CIO), University of Groningen, Groningen, The Netherlands;1. UMDI-J Facultad de Ciencias, Universidad Nacional Autónoma de México, Querétaro QRO, Mexico;2. Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, México DF, Mexico;3. Centro de Geociencias, Universidad Nacional Autónoma de México, Querétaro QRO, Mexico;4. Molina Center for Energy and the Environment, La Jolla CA, USA;5. Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma de Baja California, Tijuana BC, Mexico;6. Department of Earth, Atmospheric and Planetary Science, Massachusetts Institute of Technology, Cambridge MA, USA;1. The Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing, 100124, China;2. College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China;3. Department of Physics, University of Peshawar, Peshawar, Khyber Pakhtunkhwa, Pakistan;4. Department of Physics, Jinnah College for Women, University of Peshawar, Peshawar, Khyber Pakhtunkhwa, Pakistan;5. Department of Chemistry, Bacha Khan University, Charsadda, Khyber Pakhtunkhwa, Pakistan;6. Department of Botany, Hazara University, Mansehra, Khyber Pakhtunkhwa, Pakistan;7. Department of Chemistry, University of Swabi, Anbar, 23561, Khyber Pakhtunkhwa, Pakistan;8. Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, 21589, P.O. Box 80203, Saudi Arabia;9. Chemistry Department, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia
Abstract:The chemical states of sulfur present in ambient paniculate matter have been identified by use of X-ray photoelectron spectroscopy (X.P.S.-E.S.C.A.) Seven separate chemical species of sulfur were found in atmospheric samples taken in California. These, in terms of net sulfur charge, are SO3.SO42−, SO2. SO32−, S0 and two kinds of sulfides. Sulfates were found to be the dominant species, although reduced forms of sulfur were at times comparable to the sulfate concentrations.
Keywords:
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