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Short-Term Effects: Elemental and Morphological Assessment of Aerosols Over Old Delhi Region, India

This study presents morphological and elemental characteristics of aerosols for the duration January-June, 2021, using Scanning Electron Microscope coupled with Energy Dispersive X-Ray (SEM–EDX). The results revealed that there were numerous spherical particles (D(α) ≤ 2.5 µm) but did not produced t...

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Autores principales: Shankar, Shobhna, Gadi, Ranu, Sharma, S. K., Mandal, T. K.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer India 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10115371/
http://dx.doi.org/10.1007/s12647-023-00646-w
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author Shankar, Shobhna
Gadi, Ranu
Sharma, S. K.
Mandal, T. K.
author_facet Shankar, Shobhna
Gadi, Ranu
Sharma, S. K.
Mandal, T. K.
author_sort Shankar, Shobhna
collection PubMed
description This study presents morphological and elemental characteristics of aerosols for the duration January-June, 2021, using Scanning Electron Microscope coupled with Energy Dispersive X-Ray (SEM–EDX). The results revealed that there were numerous spherical particles (D(α) ≤ 2.5 µm) but did not produced the expected EDX-spectra for elemental constituents. Limited deposited particles were observed which showed definite elemental constitutions. The results show that Cl, S, Al, Ca, K, Fe, Zn, Na, Mg, N, Tb, Ti, Ni, F, Cd, Cu, Mn, P and Cr were the overall determined elements, out of which Cl, S, Al, Ca, K, Fe, Zn, Na and Mg were the major constituents. Variation in particles’ shapes whether definite or irregular, columnar or spherical, flaky or aggregate or crystal-accumulation were attained on the basis of the major constituting element, majorly Ca-rich, S-rich, Cl-rich and Fe-rich. Interestingly, the physical characteristics of the particles varied with variation in elemental composition. All these indicate that there were specific sources contributing toward distinct particle-morphs. Ti, Tb and Cd need more analytical studies for their percent contribution. S, Cl and K contributed the most to the elemental composition as revealed by elemental relative proportion. Atomic weight percent curves for elements were slightly scattered during May. These probably played important role in defining the diversity indices, which was highest for April (2.17 ± 0.12). Particles containing six (P(6)) to nine (P(9)) elements dominated in this study, and particles containing seven elements (P(7)) were generally observed.
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spelling pubmed-101153712023-04-20 Short-Term Effects: Elemental and Morphological Assessment of Aerosols Over Old Delhi Region, India Shankar, Shobhna Gadi, Ranu Sharma, S. K. Mandal, T. K. MAPAN Original Paper This study presents morphological and elemental characteristics of aerosols for the duration January-June, 2021, using Scanning Electron Microscope coupled with Energy Dispersive X-Ray (SEM–EDX). The results revealed that there were numerous spherical particles (D(α) ≤ 2.5 µm) but did not produced the expected EDX-spectra for elemental constituents. Limited deposited particles were observed which showed definite elemental constitutions. The results show that Cl, S, Al, Ca, K, Fe, Zn, Na, Mg, N, Tb, Ti, Ni, F, Cd, Cu, Mn, P and Cr were the overall determined elements, out of which Cl, S, Al, Ca, K, Fe, Zn, Na and Mg were the major constituents. Variation in particles’ shapes whether definite or irregular, columnar or spherical, flaky or aggregate or crystal-accumulation were attained on the basis of the major constituting element, majorly Ca-rich, S-rich, Cl-rich and Fe-rich. Interestingly, the physical characteristics of the particles varied with variation in elemental composition. All these indicate that there were specific sources contributing toward distinct particle-morphs. Ti, Tb and Cd need more analytical studies for their percent contribution. S, Cl and K contributed the most to the elemental composition as revealed by elemental relative proportion. Atomic weight percent curves for elements were slightly scattered during May. These probably played important role in defining the diversity indices, which was highest for April (2.17 ± 0.12). Particles containing six (P(6)) to nine (P(9)) elements dominated in this study, and particles containing seven elements (P(7)) were generally observed. Springer India 2023-04-19 /pmc/articles/PMC10115371/ http://dx.doi.org/10.1007/s12647-023-00646-w Text en © Metrology Society of India 2023, Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. This article is made available via the PMC Open Access Subset for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the World Health Organization (WHO) declaration of COVID-19 as a global pandemic.
spellingShingle Original Paper
Shankar, Shobhna
Gadi, Ranu
Sharma, S. K.
Mandal, T. K.
Short-Term Effects: Elemental and Morphological Assessment of Aerosols Over Old Delhi Region, India
title Short-Term Effects: Elemental and Morphological Assessment of Aerosols Over Old Delhi Region, India
title_full Short-Term Effects: Elemental and Morphological Assessment of Aerosols Over Old Delhi Region, India
title_fullStr Short-Term Effects: Elemental and Morphological Assessment of Aerosols Over Old Delhi Region, India
title_full_unstemmed Short-Term Effects: Elemental and Morphological Assessment of Aerosols Over Old Delhi Region, India
title_short Short-Term Effects: Elemental and Morphological Assessment of Aerosols Over Old Delhi Region, India
title_sort short-term effects: elemental and morphological assessment of aerosols over old delhi region, india
topic Original Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10115371/
http://dx.doi.org/10.1007/s12647-023-00646-w
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