An isotopic analysis of ionising radiation as a source of sulphuric acid

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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An isotopic analysis of ionising radiation as a source of sulphuric acid. / Enghoff, Martin Andreas Bødker; Bork, Nicolai Christian; Hattori, S.; Meusinger, C.; Nakagawa, M.; Pedersen, Jens Olaf Pepke; Danielache, S.; Ueno, Y.; Johnson, M. S.; Yoshida, N.; Svensmark, Henrik.

In: Atmospheric Chemistry and Physics, Vol. 12, No. 12, 2012, p. 5319-5327.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Harvard

Enghoff, MAB, Bork, NC, Hattori, S, Meusinger, C, Nakagawa, M, Pedersen, JOP, Danielache, S, Ueno, Y, Johnson, MS, Yoshida, N & Svensmark, H 2012, 'An isotopic analysis of ionising radiation as a source of sulphuric acid' Atmospheric Chemistry and Physics, vol 12, no. 12, pp. 5319-5327., 10.5194/acp-12-5319-2012

APA

CBE

Enghoff MAB, Bork NC, Hattori S, Meusinger C, Nakagawa M, Pedersen JOP, Danielache S, Ueno Y, Johnson MS, Yoshida N, Svensmark H. 2012. An isotopic analysis of ionising radiation as a source of sulphuric acid. Atmospheric Chemistry and Physics. 12(12):5319-5327. Available from: 10.5194/acp-12-5319-2012

MLA

Vancouver

Author

Enghoff, Martin Andreas Bødker; Bork, Nicolai Christian; Hattori, S.; Meusinger, C.; Nakagawa, M.; Pedersen, Jens Olaf Pepke; Danielache, S.; Ueno, Y.; Johnson, M. S.; Yoshida, N.; Svensmark, Henrik / An isotopic analysis of ionising radiation as a source of sulphuric acid.

In: Atmospheric Chemistry and Physics, Vol. 12, No. 12, 2012, p. 5319-5327.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{64ba78a87859498a95c66ad55ac16c21,
title = "An isotopic analysis of ionising radiation as a source of sulphuric acid",
publisher = "Copernicus GmbH",
author = "Enghoff, {Martin Andreas Bødker} and Bork, {Nicolai Christian} and S. Hattori and C. Meusinger and M. Nakagawa and Pedersen, {Jens Olaf Pepke} and S. Danielache and Y. Ueno and Johnson, {M. S.} and N. Yoshida and Henrik Svensmark",
year = "2012",
doi = "10.5194/acp-12-5319-2012",
volume = "12",
number = "12",
pages = "5319--5327",
journal = "Atmospheric Chemistry and Physics",
issn = "1680-7316",

}

RIS

TY - JOUR

T1 - An isotopic analysis of ionising radiation as a source of sulphuric acid

A1 - Enghoff,Martin Andreas Bødker

A1 - Bork,Nicolai Christian

A1 - Hattori,S.

A1 - Meusinger,C.

A1 - Nakagawa,M.

A1 - Pedersen,Jens Olaf Pepke

A1 - Danielache,S.

A1 - Ueno,Y.

A1 - Johnson,M. S.

A1 - Yoshida,N.

A1 - Svensmark,Henrik

AU - Enghoff,Martin Andreas Bødker

AU - Bork,Nicolai Christian

AU - Hattori,S.

AU - Meusinger,C.

AU - Nakagawa,M.

AU - Pedersen,Jens Olaf Pepke

AU - Danielache,S.

AU - Ueno,Y.

AU - Johnson,M. S.

AU - Yoshida,N.

AU - Svensmark,Henrik

PB - Copernicus GmbH

PY - 2012

Y1 - 2012

N2 - Sulphuric acid is an important factor in aerosol nucleation and growth. It has been shown that ions enhance the formation of sulphuric acid aerosols, but the exact mechanism has remained undetermined. Furthermore some studies have found a deficiency in the sulphuric acid budget, suggesting a missing source. In this study the production of sulphuric acid from SO2 through a number of different pathways is investigated. The production methods are standard gas phase oxidation by OH radicals produced by ozone photolysis with UV light, liquid phase oxidation by ozone, and gas phase oxidation initiated by gamma rays. The distributions of stable sulphur isotopes in the products and substrate were measured using isotope ratio mass spectrometry. All methods produced sulphate enriched in S-34 and we find an enrichment factor (delta S-34) of 8.7 +/- 0.4 parts per thousand (1 standard deviation) for the UV-initiated OH reaction. Only UV light (Hg emission at 253.65 nm) produced a clear non-mass-dependent excess of S-33. The pattern of isotopic enrichment produced by gamma rays is similar, but not equal, to that produced by aqueous oxidation of SO2 by ozone. This, combined with the relative yields of the experiments, suggests a mechanism in which ionising radiation may lead to hydrated ion clusters that serve as nanoreactors for S(IV) to S(VI) conversion.

AB - Sulphuric acid is an important factor in aerosol nucleation and growth. It has been shown that ions enhance the formation of sulphuric acid aerosols, but the exact mechanism has remained undetermined. Furthermore some studies have found a deficiency in the sulphuric acid budget, suggesting a missing source. In this study the production of sulphuric acid from SO2 through a number of different pathways is investigated. The production methods are standard gas phase oxidation by OH radicals produced by ozone photolysis with UV light, liquid phase oxidation by ozone, and gas phase oxidation initiated by gamma rays. The distributions of stable sulphur isotopes in the products and substrate were measured using isotope ratio mass spectrometry. All methods produced sulphate enriched in S-34 and we find an enrichment factor (delta S-34) of 8.7 +/- 0.4 parts per thousand (1 standard deviation) for the UV-initiated OH reaction. Only UV light (Hg emission at 253.65 nm) produced a clear non-mass-dependent excess of S-33. The pattern of isotopic enrichment produced by gamma rays is similar, but not equal, to that produced by aqueous oxidation of SO2 by ozone. This, combined with the relative yields of the experiments, suggests a mechanism in which ionising radiation may lead to hydrated ion clusters that serve as nanoreactors for S(IV) to S(VI) conversion.

UR - http://www.atmos-chem-phys.net/12/5319/2012/acp-12-5319-2012.html

U2 - 10.5194/acp-12-5319-2012

DO - 10.5194/acp-12-5319-2012

JO - Atmospheric Chemistry and Physics

JF - Atmospheric Chemistry and Physics

SN - 1680-7316

IS - 12

VL - 12

SP - 5319

EP - 5327

ER -