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Spectral Properties of Black Carbon Produced during Biomass Burning

Category: Aerosol and Atmospheric Chemistry

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DOI: 10.4209/aaqr.2017.03.0102
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Chaithanya D. Jain 1, Harish S. Gadhavi1, Tushar Wankhede1, Kanakaraju Kallelapu1, Suryasree Sudhesh2, Lidiya N. Das2, Rahul U. Pai2, Achutan Jayaraman1

  • 1 National Atmospheric Research Laboratory (NARL), DoS, Government of India, Gadanki A.P. 517112, India
  • 2 M.G. University Kottayam, Kerala 686560, India

Highlights

Spectral properties of BC produced during different biofuel burning are studied.
Biofuel sample selection was upon a survey.
Aerosol Absorption Coefficient (α) calculated found to be ranging from 1.2–2.1.
Fast and slow burning biofuels have shown low and high α values respectively.


Abstract

Spectral properties of Black Carbon (BC) produced during the burning of different biofuels have been studied using a 7 channel Aethalometer (Magee Scientific, USA). Different biofuels used for household purpose in the rural regions were selected after a survey conducted in Gadanki, A.P. – a typical village in South India. Biofuels were burnt in a custom made burning chamber and BC produced has been allowed to mix with ambient air and measured using Aethalometer kept 4 meters away from the burning chamber. The observed absorption coefficient spectra have been characterized by fitting to a power-law equation. The power co-efficient (α) values found to be ranging from 1.2–2.1 for different biofuels. It has been observed that the α values are related to the speed of burning; fast burning biofuels shown low values, whereas slow burning biofuels have shown higher values.

Keywords

Black carbon Aethalometer Biofuels Spectral properties Angstrom exponent


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