Size distribution of metals in urban aerosols in Seville (Spain) |
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| Institution: | 1. CSIR-National Physical Laboratory (CSIR-NPL), Dr. K S Krishnan Road, New Delhi 110012, India;2. Academy of Scientific & Innovative Research (AcSIR), Ghaziabad 201002, India;3. University College of Medical Sciences (UCMS), GTB Hospital, Dilshad Garden, Delhi 110095, India;4. Department of Physics and Electronics, Rajdhani College, University of Delhi, New Delhi 110015, India;5. Department of Applied Sciences and Humanities, Indira Gandhi Delhi Technical University for Women (IGDTUW), Delhi 110006, India;6. Department of Environmental Studies (DES), University of Delhi, Delhi 110007, India;7. Ministry of Environment and Forest & Climate Change, New Delhi 110003, India;8. Department of Economics, Indraprastha College for Women, University of Delhi, Delhi 110054, India;9. Department of Botany, DeshBandhu College, University of Delhi, Delhi 110019, India;10. School of Earth Sciences, Banasthali Vidyapith, Jaipur, Rajasthan 304022, India;1. Center for Environmental Nanoscience and Risk, Department of Environmental Health Sciences, University of South Carolina, Columbia, SC 29208, USA;2. Department of Geosciences, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, China;3. Center for NanoBioEarth, Department of Geosciences, Virginia Tech, Blacksburg, VA 24061-0420, USA;4. Institute for Critical Technology and Applied Science, 410 Kelly Hall, Virginia Tech, Blacksburg, VA 24061-0420, USA;5. Biology Department, Duke University, Durham, NC 27708, USA;6. Department of Ecosystem and Conservation Sciences, University of Montana, Missoula, MT 59812, USA;7. College of Agriculture and Life Sciences, Virginia Tech, Blacksburg, VA 24061-0420, USA;8. Geosciences Group, Pacific Northwest National Laboratory, Richland, WA 99354, USA;1. State Key Laboratory of Severe Weather & Key Laboratory for Atmospheric Chemistry, Chinese Academy of Meteorological Sciences, Beijing 100081, China;2. State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing 100084, China;3. Division of Atmospheric Sciences, Desert Research Institute, Reno, NV, USA;4. School of Environment, Harbin Institute of Technology, Harbin 150001, China;5. National Satellite Meteorological Center, China Meteorological Administration, Beijing 100081, China;6. National Research Center for Environmental Analysis and Measurement, Beijing, China;7. Lin''an Regional Atmosphere Background Station, Lin''an, China |
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| Abstract: | The size distribution of metals in aerosols has been studied in 12 areas of the city of Seville. Urban particles were collected with a high-volume sampling system equipped with a cascade impactor, which effectively separates the particulate matter into six-size ranges. Forty-one samples were collected in spring 1996. Each filter was extracted with a mixture of nitric and percloric acids. The acid solutions of the samples were analysed in six-particle fractions by inductively coupled plasma atomic emission spectrometry (ICP-AES). The impactor stage fractionation of particles shows a typical bimodal distributions, one corresponding to the fine mode below 1 μm (55%), and the other to the coarse mode around 10 μm (32%). With regard to the size distribution of metals, we concluded that potentially toxic metals, such as nickel, lead and cadmium are mainly accumulated in the smaller particles, with percentages of 72.6, 69.4 and 63.8%, respectively. Lead have a concentration of 63.7 ng m?3, more than copper and manganese (26.7 and 16.5 ng m?3) and above all more than nickel, cobalt and cadmium (1.97, 0.54 and 0.32 ng m?3). |
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