Skip to main content

Advertisement

Log in

Aerosol-associated non-polar organic compounds (NPOCs) at Jammu, India, in the North-Western Himalayan Region: seasonal variations in sources and processes

  • Research Article
  • Published:
Environmental Science and Pollution Research Aims and scope Submit manuscript

Abstract

Fine particulate (PM2.5) bound non-polar organic compounds (NPOCs) and associated diagnostic parameters were studied at Jammu, an urban location in the foothills of North-Western Himalayan Region. PM2.5 was collected daily (24 h, once a week) over a year to assess monthly and seasonal variations in NPOC concentration and their source(s) activity. Samples were analyzed on thermal desorption-gas chromatography mass spectrometry to identify and quantify source-specific organic markers. Homologous series of n-alkanes, polycyclic aromatic hydrocarbons (PAHs), isoprenoid hydrocarbons and nicotine were investigated to understand the sources of aerosols in the region. The annual mean concentration of PM2.5 during the sampling period was found higher than the permissible limit of India’s National Ambient Air Quality Standards (NAAQS) and World Health Organisation (WHO) guidelines. The rise of concentration for PM2.5 and associated NPOCs in summer season was attributed to enhanced emission. The n-alkane-based diagnostic parameters indicated mixed contributions of NPOCs from anthropogenic sources like fossil fuel-related combustion with significant inputs from biogenic emission. Moreover, high influence of petrogenic contribution was observed in summer (monsoon) months. The quantifiable amounts of isoprenoid hydrocarbons further confirmed this observation. Total PAH concentration also followed an increasing trend from March to June, and June onwards a sharp decrease was observed. The higher concentration of environmental tobacco smoke marker nicotine in winter months was plausibly due to lower air temperature and conditions unfavourable to photo-degradation. A clear dominance of low molecular weight PAHs was noticed with rare presence of toxic PAHs in the ambient atmosphere of Jammu. PAH-based diagnostic parameters suggested substantial contribution from low temperature pyrolysis processes like biomass/crop-residue burning, wood and coal fire in the region. Specific wood burning markers further confirmed this observation.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8

Similar content being viewed by others

Abbreviations

ACL:

Average chain length

BBs:

Box blanks

CA:

Carbonaceous aerosols

CCN:

Cloud condensation nuclei

C max :

Carbon number of the most abundant n-alkane

CPCB:

Central pollution control board

CPI:

Carbon preference index

DCF:

Dilution correction factor

Dp:

Dew point

EBs:

Equipment blanks

ETS:

Environmental tobacco smoke

HMW:

High molecular weight

IBs:

Instrument blanks

KMO:

Kaiser-Meyer-Olkin

LMW:

Low molecular weight

MDRs:

Molecular diagnostic ratios

MFC:

Mass flow controller

NAAQS:

National ambient air quality standards

NIST:

National institute of standards and testing

NOAA-HYSPLIT:

National oceanic and atmospheric administration-the hybrid single particle lagrangian integrated trajectory model

NPOCs:

Non-polar organic compounds

NWHR:

North-Western Himalayan Region

OCs:

Organic compounds

PAHs:

Polycyclic aromatic hydrocarbons

PBL:

Planetary boundary layer

PCA:

Principal component analysis

PM:

Particulate matter

PNA:

Petrogenic n-alkanes

RH:

Relative humidity

RT:

Retention time

SMVDS:

Shri Mata Vaishno Devi Shrine

TD-GC-MS:

Thermal desorption gas chromatography mass spectrometry

TNA:

Total n-alkanes

TPAH:

Total polycyclic aromatic hydrocarbons

WD:

Wind direction

WHO:

World health organization

WINS:

Well impactor ninety-six

WNA:

Wax n-alkanes

WS:

Wind speed

References

Download references

Acknowledgements

We thank NOAA-ARL for providing meteorological data. We are thankful to Prof. Arun K. Attri for providing access to his laboratory facility in School of Environmental Sciences, Jawaharlal Nehru University, New Delhi. Prof. Arun K. Attri and Dr. Ajay Kumar have been acknowledged for TD-GC-MS analysis at Advanced Instrumentation Research Facility at Jawaharlal Nehru University. Authors thank anonymous reviewers for their contribution in improving the manuscript.

Funding

This research was funded by University Grants Commission, India, in the form of Major Research Project no. MRP-MAJOR-ENVI-2013-30069 vide file no. 43-332/2014.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Shweta Yadav.

Additional information

Responsible editor: Constantini Samara

Publisher’s note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Electronic supplementary material

ESM 1

(DOCX 15599 kb)

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Yadav, S., Bamotra, S. & Tandon, A. Aerosol-associated non-polar organic compounds (NPOCs) at Jammu, India, in the North-Western Himalayan Region: seasonal variations in sources and processes. Environ Sci Pollut Res 27, 18875–18892 (2020). https://doi.org/10.1007/s11356-020-08374-3

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11356-020-08374-3

Keywords

Navigation