geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Study of the carbonaceous aerosol and morphological analysis of fine particles along with their mixing state in Delhi, India: a case study


, : Study of the carbonaceous aerosol and morphological analysis of fine particles along with their mixing state in Delhi, India: a case study. Environmental Science and Pollution Research International 22(14): 10744-10757

Because of high emissions of anthropogenic as well as natural particles over the Indo-Gangetic Plains (IGP), it is important to study the characteristics of fine (PM2.5) and inhalable particles (PM10), including their morphology, physical and chemical characteristics, etc., in Delhi during winter 2013. The mean mass concentrations of fine (PM2.5) and inhalable (PM10) (continuous) was 117.6 ± 79.1 and 191.0 ± 127.6 μg m(-3), respectively, whereas the coarse mode (PM10-2.5) particle PM mass was 73.38 ± 28.5 μg m(-3). During the same period, offline gravimetric monitoring of PM2.5 was conducted for morphological analysis, and its concentration was ~37 % higher compared to the continuous measurement. Carbonaceous PM such as organic carbon (OC) and elemental carbon (EC) were analyzed on the collected filters, and their mean concentration was respectively 33.8 and 4.0 μg m(-3) during the daytime, while at night it was 41.2 and 10.1 μg m(-3), respectively. The average OC/EC ratio was 8.97 and 3.96 during the day and night, respectively, indicating the formation of secondary organic aerosols during daytime. Effective carbon ratio was studied to see the effect of aerosols on climate, and its mean value was 0.52 and 1.79 during night and day, indicating the dominance of absorbing and scattering types of aerosols respectively into the atmosphere over the study region. Elemental analysis of individual particles indicates that Si is the most abundant element (~37-90 %), followed by O (oxide) and Al. Circularity and aspect ratio was studied, which indicates that particles are not perfectly spherical and not elongated in any direction. Trajectory analysis indicated that in the months of February and March, air masses appear to be transported from the Middle Eastern part along with neighboring countries and over Thar Desert region, while in January it was from the northeast direction which resulted in high concentrations of fine particles.

US$19.90

PMID: 25758418

DOI: 10.1007/s11356-015-4272-6


Other references

Gale, E.F., 1947: Correlation between penicillin resistance and assimilation affinity in Staphylococcus aureus. Nature 160(4064): 407-407

Simel D.L.; Feussner J.R., 1989: A randomized trial of the informed consent process in ambulatory patients. Clinical Research 37(2): 822A

Njos, A.A.modt, H., 1978: Preparing land for cultivation. Smaskrift (6)

Shelton, E.J., 1944: Selection of breeding stock. The purpose of selection of good pig breeding stock is to increase numbers and reduce production costs. First provide ample nourishing food and accommodations. Get animals from dependable herds of clean, disease-free, stock. Present demand is for...

Rodrigues, L.; Machado, D.; Couto, I.; Amaral, L.; Viveiros, M., 2012: Contribution of efflux activity to isoniazid resistance in the Mycobacterium tuberculosis complex. Resistance to isoniazid (INH), one of the main drugs used in tuberculosis (TB) therapy, is mostly due to chromosomal mutations in target genes. However, approximately 20-30% of INH resistant Mycobacterium tuberculosis isolates do not have mutation...

Shibaoka, T.; Ishikura, K.; Inatani, T.; Fukube, H.; Hiromi, K., 1974: Inhibition by analogues of the hydrolysis of phenyl alpha-maltoside catalyzed by saccharifying alpha-amylase from Bacillus subtilis. Journal of Biochemistry 76(5): 909-914

Gates, G.A., 1983: Deep neck infection. American Journal of Otolaryngology 4(6): 420-421

Celis, R.; Torres, A.; Gatell, J.M.; Almela, M.; Rodríguez-Roisin, R.; Agustí-Vidal, A., 1988: Nosocomial pneumonia. A multivariate analysis of risk and prognosis. One hundred and twenty consecutive episodes of nosocomial pneumonia (NP) in 118 nonneutropenic adults admitted to a 1,000-bed teaching hospital were studied in order to investigate the prognosis and risk factors. The overall fatality rate was 36.6...

Ryan K.J., 1982: Human bartonellosis. Wedgwood, R J Et Al (Ed ) Infections in Children Xxiii+1623p Harper And Row, Publishers: Philadelphia, Pa , Usa; London, England Illus P898-902

Bäumert, H.G.; Mainka, L.; Zimmer, G., 1981: Crosslinking studies in oligomycin-sensitive ATPase from beef heart mitochondria: interrelations of subunits with an Mr 31 000 protein. Febs Letters 132(2): 308-312