| Titolo | Surface tension of atmospheric wet aerosol and cloud/fog droplets in relation to their organic carbon content and chemical composition |
|---|---|
| Tipo di pubblicazione | Articolo su Rivista peer-reviewed |
| Anno di Pubblicazione | 2000 |
| Autori | Facchini, M.C., Decesari S., Mircea Mihaela, Fuzzi S., and Loglio G. |
| Rivista | Atmospheric Environment |
| Volume | 34 |
| Paginazione | 4853-4857 |
| Parole chiave | aerosol, aerosol composition, article, Atmospheric aerosols, Atmospheric chemistry, Atmospheric wet aerosols, carbon, carboxylic acid, Chemical composition, chemical structure, cloud, Clouds, Composition effects, dicarboxylic acid, Drop formation, Fog, fractionation, Geographic distribution, humic substance, Molecular Structure, Organic carbon, priority journal, structure activity relation, Surface active behavior, surface tension, total organic carbon, Water, water content |
| Abstract | A decrease in surface tension with respect to pure water was observed in wet aerosol and cloud/fog samples. The measured decrease of surface tension is positively correlated with the concentration of total soluble organic compounds in the samples. On the basis of a previously developed methodology to fractionate soluble organic compounds into three different classes (neutral compounds, mono- and dicarboxylic acids and polycarboxylic acids), we investigated the surface-active behaviour of the compounds within each of these classes. Polycarboxylic acids having a molecular structure analogous to that of humic substances (humic-like substances) were found to be the most effective surface-active species within the droplets: three times more effective than mono- and dicarboxylic acids and one order of magnitude more than neutral compounds. (C) 2000 Elsevier Science Ltd. A decrease in surface tension with respect to pure water was observed in wet aerosol and cloud/fog samples. The measured decrease of surface tension is positively correlated with the concentration of total soluble organic compounds in the samples. On the basis of a previously developed methodology to fractionate soluble organic compounds into three different classes (neutral compounds, mono- and dicarboxylic acids and polycarboxylic acids), we investigated the surface-active behaviour of the compounds within each of these classes. Polycarboxylic acids having a molecular structure analogous to that of humic substances (humic-like substances) were found to be the most effective surface-active species within the droplets: three times more effective than mono- and dicarboxylic acids and one order of magnitude more than neutral compounds. |
| Note | cited By 203 |
| URL | https://www.scopus.com/inward/record.uri?eid=2-s2.0-0034283462&partnerID=40&md5=54425e47229f4fa9f8cc91e4ef7b97b6 |
| Citation Key | Facchini20004853 |
