| Abstract |
The present work includes the study of linear alkylbenzene sulphonates (LAS) in atmospheric aerosols, the determination their sources of origin and the investigation of the conditions responsible for the transfer of LAS from water to the atmosphere. For this purpose samples were collected i) above aeration tanks of waste water treatment plant (WWTP) of Heraklion, ii) in the Coastal area of the northern beach of Crete, iii) in the urban area of Heraklion and iv) in the research station of ECPL in Finokalia. Samples were also collected in waste water, coastal water of north Heraklion, in the gulf of Finokalia and during total atmospheric deposition. LAS were analysed by HPLC UV detection, with solid-phase extraction pretreatment. A new method was developed for the analysis of aerosols. The analysis of the water samples was undertaken by a method that was optimized in order to improve the results. The extraction, separation and detection of LAS homologs in the above alnalytical methods, included high resolution, recovery, low limit of detection and satisfactory time of analysis. The analysis of air samples showed that LAS were distributed mostly in the particles of the atmosphere (GFF). A minor percentage was found in the the air phase (PUF) and it was due to desorption of LAS from the corresponding particles that were collected on the filters. The total concentrations in the aerosols near the WWTP were higher than the ones in the coastal area. The distribution of the individual LAS homologs in aerosol samples of WWTP was very similar to that of the waste water while the aerosol samples of the coastal area was similar the sea water. So it can be concluded that aerosol particles are released from the bursting bubbles of waste and sea water transporting LAS to the atmosphere. The distribution of the individual LAS homologs in urban aerosols was very similar to the coastal ones meaning that the most basic source of contribution of LAS in the atmosphere is the sea.
|
Μελέτη των εκπομπών και των παραγόντων που καθορίζουν την παρουσία των γραμμικών αλκυλοβενζολισουλφονικών επιφανειοδραστικών στην ατμόσφαιρα πα΄ρακτιων περιοχών
