- Volumes 84-95 (2024)
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Volumes 72-83 (2023)
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Volume 83
Pages 1-258 (December 2023)
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Volume 82
Pages 1-204 (November 2023)
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Volume 81
Pages 1-188 (October 2023)
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Volume 80
Pages 1-202 (September 2023)
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Volume 79
Pages 1-172 (August 2023)
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Volume 78
Pages 1-146 (July 2023)
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Volume 77
Pages 1-152 (June 2023)
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Volume 76
Pages 1-176 (May 2023)
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Volume 75
Pages 1-228 (April 2023)
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Volume 74
Pages 1-200 (March 2023)
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Volume 73
Pages 1-138 (February 2023)
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Volume 72
Pages 1-144 (January 2023)
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Volume 83
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Volumes 60-71 (2022)
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Volume 71
Pages 1-108 (December 2022)
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Volume 70
Pages 1-106 (November 2022)
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Volume 69
Pages 1-122 (October 2022)
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Volume 68
Pages 1-124 (September 2022)
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Volume 67
Pages 1-102 (August 2022)
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Volume 66
Pages 1-112 (July 2022)
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Volume 65
Pages 1-138 (June 2022)
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Volume 64
Pages 1-186 (May 2022)
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Volume 63
Pages 1-124 (April 2022)
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Volume 62
Pages 1-104 (March 2022)
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Volume 61
Pages 1-120 (February 2022)
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Volume 60
Pages 1-124 (January 2022)
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Volume 71
- Volumes 54-59 (2021)
- Volumes 48-53 (2020)
- Volumes 42-47 (2019)
- Volumes 36-41 (2018)
- Volumes 30-35 (2017)
- Volumes 24-29 (2016)
- Volumes 18-23 (2015)
- Volumes 12-17 (2014)
- Volume 11 (2013)
- Volume 10 (2012)
- Volume 9 (2011)
- Volume 8 (2010)
- Volume 7 (2009)
- Volume 6 (2008)
- Volume 5 (2007)
- Volume 4 (2006)
- Volume 3 (2005)
- Volume 2 (2004)
- Volume 1 (2003)
• Urban road silt load was studied using scanning electron microscopy.
• Equivalent spherical diameter of most particles was between 10 μm and 30 μm.
• Fine particles had a higher concentration at locations with high-traffic volume.
• Combustion was identified as the major source of spherical particles.
• The major source of mineral particles was crustal material.
Urban road dust was collected from Vellore City, Tamil Nadu, India, and analyzed. Scanning electron microscopy (SEM) was used to examine road dust from nine sampling locations in the study region. SEM image analysis was used to identify various shape factors of collected dust particles. The equivalent spherical diameter of most particles was between 10 μm and 30 μm. Fine particles had greater concentrations at locations with higher traffic flow. Particles were categorized into four classes based on their shape factors, viz., spherical, mineral, elongated, or irregular. Spherical particles had the smallest mean equivalent diameter (1.95 μm) and mineral particles had the largest diameter (33.3 μm). Spherical particles made up the smallest portion of road dust (0–12%) in the study region and mineral particles made up the largest (45–65%). Elongated and irregular particles, each made up 23–30% of road dust. Electron dispersive X-ray spectroscopy analysis was used to identify the elemental composition of dust particles. Spherical particles were mostly from combustion sources and mineral particles were largely of crustal origin. No individual source was found for irregular and elongated particles. Biological debris was the major source of irregular particles.