Physico-chemical speciation and transformation reactions of particulate atmospheric nitrogen and sulphur compounds |
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| Affiliation: | 1. Department of Health and Human physiology, College of Liberal Arts and Sciences, University of Iowa, Iowa City, IA, USA;2. Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA, USA;3. Division of Epidemiology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN;4. Metabolic Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Rockville, MD, USA;1. State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Arizona Department of Environmental Quality, Phoenix, AZ 85007, USA;4. John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA;5. College of Resources and Environment, Southwest University, Chongqing 400715, China |
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| Abstract: | Using X-ray powder diffraction it is possible to identify a number of discrete compounds of nitrogen and sulphur in atmospheric aerosols. The compounds observed include ammonia neutralization products of airborne acids, including mixed ammonium nitrate-sulphate salts. Products of hydrogen halide displacement by HNO3 and H2SO4 are identified both from size-differentiated ion balance studies and X-ray diffraction. A number of mixed metal-ammonium sulphate salts are attributed to reactions of ammonium sulphate subsequent to aerosol coagulation processes. |
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