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Water, Air, and Soil Pollution

, Volume 183, Issue 1–4, pp 447–454 | Cite as

Ambient Levels and Sources of Lower Carbonyls at Montelibretti, Rome (Italy)

  • Massimiliano Possanzini
  • Giorgio Tagliacozzo
  • Angelo Cecinato
Article

Abstract

Concentration levels of 11 lower carbonyls were studied at Montelibretti, a semi-rural area near Rome, Italy, over July–September 2005 and February 2006. In both periods the most abundant carbonyls were acetone and formaldehyde, followed by methylglyoxal, acetaldehyde and hexanal. Monthly variation was apparent with maximum values observed in July, when levels at least a factor two higher compared to the successive months were observed. In summer all carbonyls except acetone were reasonably well correlated among themselves and with ozone. In addition very high formaldehyde/benzene concentration ratios were measured in the summer months compared to February. These findings indicated that photochemical reactions should be the major source of carbonyls in summer. Ranking of carbonyls respect to ozone production potential emphasized the predominance of formaldehyde and methylglyoxal, followed at a distance by glyoxal and acetaldehyde.

Keywords

Aldehydes and ketones Ambient levels Ozone formation Photochemical reactivity 

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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Massimiliano Possanzini
    • 1
  • Giorgio Tagliacozzo
    • 1
  • Angelo Cecinato
    • 1
  1. 1.Istituto Inquinamento Atmosferico CNRMonterotondo Scalo (RM)Italy

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