Do bromine and surface-active substances influence the coastal atmospheric particle growth?

Autor:	Vidović K; National Institute of Chemistry, Department of Analytical Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia.; Ruđer Bošković Institute, Division for Marine and Environmental Research, Laboratory for Physical Oceanography Chemistry of Aquatic Systems, Bijenička cesta 54, 10000, Zagreb, Croatia., Hočevar S; National Institute of Chemistry, Department of Analytical Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia., Grgić I; National Institute of Chemistry, Department of Analytical Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia., Metarapi D; National Institute of Chemistry, Department of Analytical Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia., Dominović I; Ruđer Bošković Institute, Division for Marine and Environmental Research, Laboratory for Physical Oceanography Chemistry of Aquatic Systems, Bijenička cesta 54, 10000, Zagreb, Croatia., Mifka B; Faculty of Physics University of Rijeka, Radmile Matejčić 2, 51000, Rijeka, Croatia., Gregorič A; Aerosol d.o.o., Kamniška 39A, 1000, Ljubljana, Slovenia.; University of Nova Gorica, Center for Atmospheric Research, Vipavska 11c, 5270 Ajdovščina, Slovenia., Alfoldy B; Aerosol d.o.o., Kamniška 39A, 1000, Ljubljana, Slovenia., Ciglenečki I; Ruđer Bošković Institute, Division for Marine and Environmental Research, Laboratory for Physical Oceanography Chemistry of Aquatic Systems, Bijenička cesta 54, 10000, Zagreb, Croatia.
Jazyk:	angličtina
Zdroj:	Heliyon [Heliyon] 2024 May 21; Vol. 10 (11), pp. e31632. Date of Electronic Publication: 2024 May 21 (Print Publication: 2024).
DOI:	10.1016/j.heliyon.2024.e31632
Abstrakt:	New particle formation (NPF) is considered a major source of aerosol particles and cloud condensation nuclei (CCN); however, our understanding of NPF and the subsequent particle growth mechanisms in coastal areas remains limited. This study provides evidence of frequent NPF events followed by particle growth in the middle Adriatic Sea during the summer months at the coastal station of Rogoznica in Croatia. To our knowledge, this is the first study to report such events in this region. Our research aims to improve the understanding of NPF by investigating particle growth through detailed physicochemical characterization and event classification. We used a combination of online measurements and offline particle collection, followed by a thorough chemical analysis. Our results suggest the role of bromine in the particle growth process and provide evidence for its involvement in combination with organic compounds. In addition, we demonstrated the significant influence of surface-active substances (SAS) on particle growth. NPF and particle growth events have been observed in air masses originating from the Adriatic Sea, which can serve as an important source of volatile organic compounds (VOC). Our study shows an intricate interplay between bromine, organic carbon (OC), and SAS in atmospheric particle growth, contributing to a better understanding of coastal NPF processes. In this context, we also introduced a new approach using the semi-empirical 1 st derivative method to determine the growth rate for each time point that is not sensitive to the nonlinear behavior of the particle growth over time. We observed that during NPF and particle growth event days, the OC concentration measured in the ultrafine mode particle fraction was higher compared to non-event days. Moreover, in contrast to non-event days, bromine compounds were detected in the ultrafine mode atmospheric particle fraction on nearly all NPF and particle growth event days. Regarding sulfuric acid, the measured sulfate concentration in the ultrafine mode atmospheric particle fraction on both NPF event and non-event days showed no significant differences. This suggests that sulfuric acid may not be the primary factor influencing the appearance of NPF and the particle growth process in the coastal region of Rogoznica. Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (© 2024 The Authors.)
Databáze:	MEDLINE
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