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Imprints of vehicular pollution in roadside dust from Kolkata, India: insights from magnetic susceptibility, geo-statistical and SEM studies


Affiliations
1 Department of Geological Sciences, Jadavpur University, 188 Raja S.C. Mullick Road, Kolkata 700 032, India, India
2 Department of Geological Sciences, Jadavpur University, 188 Raja S.C. Mullick Road, Kolkata 700 032, India; Department of Geology, Rajiv Gandhi University, Rono Hills, Papum Pare 791 112, India, India
3 Department of Geological Sciences, Jadavpur University, 188 Raja S.C. Mullick Road, Kolkata 700 032, India, India
4 Department of Geological Sciences, Jadavpur University, 188 Raja S.C. Mullick Road, Kolkata 700 032, India; Geology Department, Asutosh College, S.P. Mukherjee Road, Kolkata 700 026, India, India
 

The present study aimed to determine the magnetic susceptibility of roadside dust collected from different parts of Kolkata city, West Bengal, India. The average value of susceptibility was 4.96 ´ 10–6 m3/kg, the highest being 19.6 ´ 10–6 m3/kg and the lowest being 1.2 ´ 10–6 m3/kg. The frequency-dependent susceptibility value (average = 2.19) indicated the dominance of stable-single domain grains with a low concentration of superparamagnetic grains at a few locations. SEM analysis showed morphological diversity of road dust – irregular, aggregate, angular and cloudy. Energy dispersive X-ray spectroscopy analysis of the dust particles revealed that Ca-rich, Na-rich and Fe-rich particles were abundant. Compositions were variable with the morphology. The mapping of magnetic susceptibility indicated that the susceptibility values were higher in areas with heavy vehicular traffic and other polluting sources. However, some areas with high pollution had open spaces, indicating the dispersion of magnetic pollutants. The study indicated the degradation of the environment due to anthropogenic activities
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  • Imprints of vehicular pollution in roadside dust from Kolkata, India: insights from magnetic susceptibility, geo-statistical and SEM studies

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Authors

Supriya Mondal
Department of Geological Sciences, Jadavpur University, 188 Raja S.C. Mullick Road, Kolkata 700 032, India, India
Saurodeep Chatterjee
Department of Geological Sciences, Jadavpur University, 188 Raja S.C. Mullick Road, Kolkata 700 032, India; Department of Geology, Rajiv Gandhi University, Rono Hills, Papum Pare 791 112, India, India
Rimjhim Maity
Department of Geological Sciences, Jadavpur University, 188 Raja S.C. Mullick Road, Kolkata 700 032, India, India
Debesh Gain
Department of Geological Sciences, Jadavpur University, 188 Raja S.C. Mullick Road, Kolkata 700 032, India, India
Dipanjan Mazumdar
Department of Geological Sciences, Jadavpur University, 188 Raja S.C. Mullick Road, Kolkata 700 032, India; Geology Department, Asutosh College, S.P. Mukherjee Road, Kolkata 700 026, India, India

Abstract


The present study aimed to determine the magnetic susceptibility of roadside dust collected from different parts of Kolkata city, West Bengal, India. The average value of susceptibility was 4.96 ´ 10–6 m3/kg, the highest being 19.6 ´ 10–6 m3/kg and the lowest being 1.2 ´ 10–6 m3/kg. The frequency-dependent susceptibility value (average = 2.19) indicated the dominance of stable-single domain grains with a low concentration of superparamagnetic grains at a few locations. SEM analysis showed morphological diversity of road dust – irregular, aggregate, angular and cloudy. Energy dispersive X-ray spectroscopy analysis of the dust particles revealed that Ca-rich, Na-rich and Fe-rich particles were abundant. Compositions were variable with the morphology. The mapping of magnetic susceptibility indicated that the susceptibility values were higher in areas with heavy vehicular traffic and other polluting sources. However, some areas with high pollution had open spaces, indicating the dispersion of magnetic pollutants. The study indicated the degradation of the environment due to anthropogenic activities

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DOI: https://doi.org/10.18520/cs%2Fv124%2Fi1%2F56-62