e-journal

Sources and reactivity of NMHCs and VOCs in the atmosphere: A review

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Abstract.
Nonmethane hydrocarbons (NMHCs) and volatile organic compounds (VOCs) are important species
present in the environment, which results in alteration of the chemistry of atmosphere. On the global
scale natural emissions of NMHCs and VOCs exceed anthropogenic emissions, although anthropogenic
sources usually dominate within urban areas. Among the natural sources, vegetation is the dominant
source. Oceanic and microbial production of these species is minimal as compared to other sources of
input. Isoprene and terpenes are main species of NMHCs which are emitted from plants as a protective
mechanism against temperature stress tolerance and protection from ravages of insects and pests. The
major anthropogenic sources for NMHCs emissions are biomass burning and transportation. NMHCs play
a significant role in ozone (O3) production in the presence of adequate concentration of oxides of nitrogen
in the atmosphere. The production of O3 is based on Maximum Incremental Reactivity (MIR) of NMHCS
and VOCs. The compound’s MIR multiplied by molecularweight gives Relative Ozone Productivity (ROPi).
To check the reliability of current methods of measuring the NMHCs the Nonmethane Hydrocarbon Intercomparison
Experiment (NMHICE) had been designed. The sample of known composition and unknown
concentration of different hydrocarbons was supplied to different laboratories worldwide and less than
50% laboratories correctly separated the unknown mixture. Atmospheric scientists throughout theworld
are evaluating current analytical methods being employed and are trying to correct the problems to
ensure quality control in hydrocarbon analysis.

Keywords:
NMHCs
VOCs
Sources
Reactivity

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Informasi Detail

Judul Seri

Journal of Hazardous Materials

No. Panggil

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Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Journal of Hazardous Materials 166 (2009) 17–26

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

LINGKUNGAN HIDUP

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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