Characterization of airborne dust samples collected from core areas of Kathmandu Valley.
Asbestos
Cement
Chemistry
Clay minerals
Earth sciences
Environmental science
Health sciences
Microscopy materials science
Particulate matter
Journal
Heliyon
ISSN: 2405-8440
Titre abrégé: Heliyon
Pays: England
ID NLM: 101672560
Informations de publication
Date de publication:
Apr 2020
Apr 2020
Historique:
received:
14
12
2019
revised:
05
02
2020
accepted:
14
04
2020
entrez:
6
5
2020
pubmed:
6
5
2020
medline:
6
5
2020
Statut:
epublish
Résumé
Kathmandu Valley is reported to be one of the highly polluted and populated cities in the world. Particulate matter is one of the major contributors of unhealthy air in Kathmandu. Although there are several reports on spatial and temporal variation of air quality of Kathmandu Valley, the morphological and mineralogical characteristics of particulate matter are very limited or none. In this study, we report on the mineralogical and morphological analysis of airborne particulate matter collected from densely populated core areas of Kathmandu Valley using spectroscopic and microscopic techniques. The Fourier Transform Infrared (FTIR) and X-ray Diffraction (XRD) data showed the presence of clay minerals, crystalline silicate mineral, carbonate minerals, and asbestiform mineral in the dust samples. The field emission scanning electron microscopic analysis confirmed the existence of particles having diverse morphology with some of the particles having aspect ratio as high as twenty; indicating the existence of asbestiform type minerals. Based on SEM-EDX data, we found that the relative distribution of elements to be different in different samples and C, O, Mg, Ca, and Si were the major elements in the dust samples. Interestingly, the XRD data analysis showed that in all the samples quartz mineral having high degree of crystallinity was present. The XRD measurement was also carried out in three different brands of cement samples. Few minerals present in dust samples were also identified in the cement samples. This observation could indicate that cement is one of the sources of minerals in the airborne particulate matter in the Kathmandu Valley.
Identifiants
pubmed: 32368645
doi: 10.1016/j.heliyon.2020.e03791
pii: S2405-8440(20)30636-8
pii: e03791
pmc: PMC7184532
doi:
Types de publication
Journal Article
Langues
eng
Pagination
e03791Informations de copyright
© 2020 The Author(s).
Références
Micron. 2017 Dec;103:90-98
pubmed: 29031165
Sci Total Environ. 2015 Dec 15;538:86-92
pubmed: 26298251
Angew Chem Int Ed Engl. 2005 Nov 25;44(46):7520-40
pubmed: 16302183
Heart Asia. 2011 Jan 01;3(1):87-91
pubmed: 27326001
Environ Res. 2013 Jul;124:54-64
pubmed: 23664080
Environ Health Perspect. 2005 Mar;113(3):255-60
pubmed: 15743711
Environ Health Perspect. 2000 Aug;108 Suppl 4:665-74
pubmed: 10931785
J Air Waste Manag Assoc. 2006 Jun;56(6):709-42
pubmed: 16805397
Nature. 2005 Nov 17;438(7066):310-7
pubmed: 16292302
Lancet. 2018 Feb 3;391(10119):462-512
pubmed: 29056410
J Environ Monit. 2008 Dec;10(12):1394-408
pubmed: 19037480
Arch Toxicol. 2002 Jan;75(11-12):625-34
pubmed: 11876495
J Occup Health. 2003 Mar;45(2):94-103
pubmed: 14646300
Circulation. 2004 Jun 1;109(21):2655-71
pubmed: 15173049
J Expo Sci Environ Epidemiol. 2012 May-Jun;22(3):235-42
pubmed: 22395259
Phys Chem Chem Phys. 2014 Sep 7;16(33):17634-9
pubmed: 25027312
Int J Environ Anal Chem. 1986;27(4):315-23
pubmed: 3028969
Environ Pollut. 2008 Jan;151(2):362-7
pubmed: 17646040
Aerosol Air Qual Res. 2018 Sep 28;18(6):1431-1447
pubmed: 30344547
Eur Respir J. 2001 Apr;17(4):733-46
pubmed: 11401072
Environ Int. 2015 Jan;74:136-43
pubmed: 25454230
Lancet. 2017 May 13;389(10082):1907-1918
pubmed: 28408086
Am Rev Respir Dis. 1971 Oct;104(4):525-35
pubmed: 5094050
Scand J Work Environ Health. 1997 Apr;23(2):93-103
pubmed: 9167232
Ann Occup Hyg. 1985;29(2):149-67
pubmed: 2998257