Rising bubbles as mechanism for scavenging and aerosolization of diatoms. (February 2019)

• Record Type: Journal Article
• Authors: Marks, Roman; Górecka, Ewa; McCartney, Kevin; Borkowski, Wojciech
• Is Part Of: Journal of aerosol science. Volume 128(2019)
• Page Start: 79
• Page End: 88
• Publication Date: 2019-02
• Subjects: Bioaerosols -- Biomolecule scavenge -- Jet droplet enrichment -- Diatoms -- Bacteria; Aerosols -- Periodicals; Aerosols -- Periodicals; Aérosols -- Périodiques; 541.34515
• DOI: 10.1016/j.jaerosci.2018.12.003
• Languages: English
• ISSNs: 0021-8502

Abstract

Abstract: Bubbles rising in saline water cause steady displacement of ions at the bubble boundaries which creates anionic upper half sphere and significantly stronger cationic vortex. Since viable diatoms as well as bacteria develop negative charge on outer membranes, these are attracted to the cationic bubble bottom vortex that forms a whirling collection pocket. When bubble bursts at the air/water interface the diatoms and bacteria are ejected into the air with initial or secondary jet droplets that are projected upward with a small water column derived from a sub-bubble cationic vortex. Laboratory experiments conducted in brackish and oceanic saline water on Nanofrustulum and Cyclotella cells indicate that their incorporation into jet droplets compared to original concentration in bulk water (here termed the enrichment factor) may range from 8 to 307. Highlights: The research outline a bubble-mediated mechanism that is responsible for scavenge/ aerosolization of diatoms and bacteria. The mechanism incorporates assembly of cationic domains that are ejected into jet droplets with biological particles. Thus the synergistic bubble-mediated processing of matter in saline water may assembled biological molecules. The same mechanism is also responsible for accumulation of biological materials at the ocean surface microlayer.