1
|
Christiansen MB, Stanier CO, Hughes DD, Stone EA, Pierce RB, Oleson JJ, Elzey S. Size-resolved aerosol at a Coastal Great Lakes Site: Impacts of new particle formation and lake spray. PLoS One 2024; 19:e0300050. [PMID: 38574045 PMCID: PMC10994298 DOI: 10.1371/journal.pone.0300050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 02/15/2024] [Indexed: 04/06/2024] Open
Abstract
The quantification of aerosol size distributions is crucial for understanding the climate and health impacts of aerosols, validating models, and identifying aerosol sources. This work provides one of the first continuous measurements of aerosol size distribution from 1.02 to 8671 nm near the shore of Lake Michigan. The data were collected during the Lake Michigan Ozone Study (LMOS 2017), a comprehensive air quality measurement campaign in May and June 2017. The time-resolved (2-min) size distribution are reported herein alongside meteorology, remotely sensed data, gravimetric filters, and gas-phase variables. Mean concentrations of key aerosol parameters include PM2.5 (6.4 μg m-3), number from 1 to 3 nm (1.80x104 cm-3) and number greater than 3 nm (8x103 cm-3). During the field campaign, approximately half of days showed daytime ultrafine burst events, characterized by particle growth from sub 10 nm to 25-100 nm. A specific investigation of ultrafine lake spray aerosol was conducted due to enhanced ultrafine particles in onshore flows coupled with sustained wave breaking conditions during the campaign. Upon closer examination, the relationships between the size distribution, wind direction, wind speed, and wave height did not qualitatively support ultrafine particle production from lake spray aerosol; statistical analysis of particle number and wind speed also failed to show a relationship. The alternative hypothesis of enhanced ultrafine particles in onshore flow originating mainly from new particle formation activity is supported by multiple lines of evidence.
Collapse
Affiliation(s)
- Megan B. Christiansen
- Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, Iowa, United States of America
| | - Charles O. Stanier
- Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, Iowa, United States of America
| | - Dagen D. Hughes
- Department of Chemistry, University of Iowa, Iowa City, Iowa, United States of America
| | - Elizabeth A. Stone
- Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, Iowa, United States of America
- Department of Chemistry, University of Iowa, Iowa City, Iowa, United States of America
| | - R. Bradley Pierce
- Space Science and Engineering Center, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Jacob J. Oleson
- Department of Biostatistics, University of Iowa, Iowa City, Iowa, United States of America
| | - Sherrie Elzey
- TSI Incorporated, Shoreview, Minnesota, United States of America
| |
Collapse
|
2
|
Xu M, Tchinda NT, Li S, Du L. Enhanced saccharide enrichment in sea spray aerosols by coupling surface-active fatty acids. Sci Total Environ 2024; 916:170322. [PMID: 38278262 DOI: 10.1016/j.scitotenv.2024.170322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/27/2023] [Accepted: 01/18/2024] [Indexed: 01/28/2024]
Abstract
The chemical composition of aerosols plays a significant role in aerosol-cloud interactions and, although saccharides make up their largest organic mass fraction, the current process model for understanding sea spray aerosol (SSA) composition struggles to replicate the enrichment of saccharides that has been observed. Here, we simulated the generation of SSA and quantified the enrichment of two soluble saccharides (glucose and trehalose) in SSA with a homemade sea spray aerosol generator. The results of the generation experiments demonstrated that both saccharides, especially trehalose, can promote the generation of SSA, whereas surface-active fatty acids primarily inhibit SSA production due to fewer bubble bursts caused by a large amount of foam accumulation. A significant decrease in surface tension of seawater with the addition of fatty acids was observed, while only a minor decrease was observed for seawater with the addition of only saccharide. Enrichment factors (EFs) of saccharides measured using high performance anion-exchange chromatography (HPAEC) with pulsed amperometric detection (PAD) revealed no enrichment of glucose in submicron SSA, while trehalose showed a slight enrichment. In the presence of surface-active fatty acids on the seawater surface, a significant increase in the enrichment of saccharides in SSA was observed, with glucose and trehalose showing EF of approximately 27-fold and 58-fold, respectively. Besides, this enrichment was accompanied by the accumulation of calcium and magnesium ions. The results presented here suggest that the coupling interaction mechanism of soluble saccharides and surface-active fatty acids on the ocean surface contributes to the enrichment of soluble saccharides in SSA.
Collapse
Affiliation(s)
- Minglan Xu
- Environment Research Institute, Shandong University, Binhai Road 72, Qingdao 266237, China
| | - Narcisse Tsona Tchinda
- Environment Research Institute, Shandong University, Binhai Road 72, Qingdao 266237, China
| | - Siyang Li
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation, School of Ecology and Environment, Hainan University, No. 58, Renmin Avenue, Haikou 570228, China
| | - Lin Du
- Environment Research Institute, Shandong University, Binhai Road 72, Qingdao 266237, China.
| |
Collapse
|
3
|
Pendergraft MA, Belda-Ferre P, Petras D, Morris CK, Mitts BA, Aron AT, Bryant M, Schwartz T, Ackermann G, Humphrey G, Kaandorp E, Dorrestein PC, Knight R, Prather KA. Bacterial and Chemical Evidence of Coastal Water Pollution from the Tijuana River in Sea Spray Aerosol. Environ Sci Technol 2023; 57:4071-4081. [PMID: 36862087 PMCID: PMC10018732 DOI: 10.1021/acs.est.2c02312] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 12/21/2022] [Accepted: 12/23/2022] [Indexed: 06/18/2023]
Abstract
Roughly half of the human population lives near the coast, and coastal water pollution (CWP) is widespread. Coastal waters along Tijuana, Mexico, and Imperial Beach (IB), USA, are frequently polluted by millions of gallons of untreated sewage and stormwater runoff. Entering coastal waters causes over 100 million global annual illnesses, but CWP has the potential to reach many more people on land via transfer in sea spray aerosol (SSA). Using 16S rRNA gene amplicon sequencing, we found sewage-associated bacteria in the polluted Tijuana River flowing into coastal waters and returning to land in marine aerosol. Tentative chemical identification from non-targeted tandem mass spectrometry identified anthropogenic compounds as chemical indicators of aerosolized CWP, but they were ubiquitous and present at highest concentrations in continental aerosol. Bacteria were better tracers of airborne CWP, and 40 tracer bacteria comprised up to 76% of the bacteria community in IB air. These findings confirm that CWP transfers in SSA and exposes many people along the coast. Climate change may exacerbate CWP with more extreme storms, and our findings call for minimizing CWP and investigating the health effects of airborne exposure.
Collapse
Affiliation(s)
- Matthew A. Pendergraft
- Scripps
Institution of Oceanography, University
of California San Diego, San Diego, La Jolla, California 92037, United States
| | - Pedro Belda-Ferre
- Department
of Pediatrics, University of California, San Diego, La Jolla, California 92093, United States
| | - Daniel Petras
- Scripps
Institution of Oceanography, University
of California San Diego, San Diego, La Jolla, California 92037, United States
- Collaborative
Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and
Pharmaceutical Science, University of California, San Diego, La Jolla, California 92093, United States
- CMFI
Cluster of Excellence, Interfaculty Institute of Microbiology and
Medicine, University of Tuebingen, Tuebingen 72076, Germany
| | - Clare K. Morris
- Scripps
Institution of Oceanography, University
of California San Diego, San Diego, La Jolla, California 92037, United States
- Department
of Chemistry and Biochemistry, University
of California, San Diego, La Jolla, California 92093, United States
| | - Brock A. Mitts
- Department
of Chemistry and Biochemistry, University
of California, San Diego, La Jolla, California 92093, United States
| | - Allegra T. Aron
- Collaborative
Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and
Pharmaceutical Science, University of California, San Diego, La Jolla, California 92093, United States
- Department
of Chemistry and Biochemistry, University
of Denver, Denver, Colorado 80210, United
States
| | - MacKenzie Bryant
- Department
of Pediatrics, University of California, San Diego, La Jolla, California 92093, United States
| | - Tara Schwartz
- Department
of Pediatrics, University of California, San Diego, La Jolla, California 92093, United States
| | - Gail Ackermann
- Department
of Pediatrics, University of California, San Diego, La Jolla, California 92093, United States
| | - Greg Humphrey
- Department
of Pediatrics, University of California, San Diego, La Jolla, California 92093, United States
| | - Ethan Kaandorp
- Independent
Researcher, Darwin, California 93522, United States
| | - Pieter C. Dorrestein
- Department
of Pediatrics, University of California, San Diego, La Jolla, California 92093, United States
- Collaborative
Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and
Pharmaceutical Science, University of California, San Diego, La Jolla, California 92093, United States
- Center
for Microbiome Innovation, University of
California, San Diego, La Jolla, California 92093, United States
| | - Rob Knight
- Department
of Pediatrics, University of California, San Diego, La Jolla, California 92093, United States
- Center
for Microbiome Innovation, University of
California, San Diego, La Jolla, California 92093, United States
- Department
of Bioengineering, University of California, San Diego, La Jolla, California 92093, United States
- Department
of Computer Sciences and Engineering, University
of California, San Diego, La Jolla, California 92093, United States
| | - Kimberly A. Prather
- Scripps
Institution of Oceanography, University
of California San Diego, San Diego, La Jolla, California 92037, United States
- Department
of Chemistry and Biochemistry, University
of California, San Diego, La Jolla, California 92093, United States
| |
Collapse
|
4
|
Chapple R, Chivas-Joly C, Roux JC, Dumazert L, Ferry L, Lopez-Cuesta JM, Erskine EL, Kandola BK. Characterization of aerosolized particles in effluents from carbon fibre composites incorporating nanomaterials during simultaneous fire and impact. NanoImpact 2023; 29:100446. [PMID: 36503111 DOI: 10.1016/j.impact.2022.100446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 11/30/2022] [Accepted: 12/06/2022] [Indexed: 06/17/2023]
Abstract
This work investigates the aerosols emitted from carbon fibre-reinforced epoxy composites (CFC) incorporating nanomaterials (nanoclays and nanotubes), subjected to simultaneous fire and impact, representing an aeroplane or automotive crash. Simultaneous fire and impact tests were performed using a previously described bespoke testing methodology with the capability to collect particles released from the front/back faces of the impacted composites plus the effluents. In this work the methodology has been further developed by connecting the Dekati Low Pressure Impactor (DLPI) and Mini Particle Sampler (MPS) sampling system in the extraction chimney. The aerosols emitted have been characterized using various devices devoted to the analysis of aerosols. The influence of the nanoadditives in the matrix on the number concentration and the size distribution of airborne particles produced, was studied with a cascade impactor in the 5 nm-10 μm range. The morphology of the separated soot fractions was examined by SEM. The measurement of aerodynamic size of particles that can deposit in human respiratory tract indicate that 75% of the soot and particles released from CFC could deposit in the lungs reaching the bronchi region at a minimum. There was however, a minimal difference between the number particle concentrations or particle-size mass distribution of particles from CFC and CFC containing nanoadditives. Moreover, no fibres were found in the effluents.
Collapse
Affiliation(s)
- R Chapple
- IMRI, University of Bolton, Deane Road, Bolton BL3 5AB, UK
| | - C Chivas-Joly
- LNE, CARMEN Platform, DMSI, 29 Avenue Roger Hennequin, 78197 Trappes, France
| | - J-C Roux
- PCH, IMT Mines Ales, 6 Avenue de Clavières 30319 Alès Cedex, France
| | - L Dumazert
- PCH, IMT Mines Ales, 6 Avenue de Clavières 30319 Alès Cedex, France
| | - L Ferry
- PCH, IMT Mines Ales, 6 Avenue de Clavières 30319 Alès Cedex, France
| | - J-M Lopez-Cuesta
- PCH, IMT Mines Ales, 6 Avenue de Clavières 30319 Alès Cedex, France
| | | | - B K Kandola
- IMRI, University of Bolton, Deane Road, Bolton BL3 5AB, UK.
| |
Collapse
|
5
|
Song Y, Li J, Tsona NT, Liu L, Du L. Enrichment of short-chain organic acids transferred to submicron sea spray aerosols. Sci Total Environ 2022; 851:158122. [PMID: 35988626 DOI: 10.1016/j.scitotenv.2022.158122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 08/10/2022] [Accepted: 08/15/2022] [Indexed: 06/15/2023]
Abstract
Organic acids, considered to be a substantial component of the marine carbon cycle, can enter the atmosphere through sea spray aerosol (SSA) and further affect the climate. Despite their importance, the distribution and mixing state of organic acids in SSA over the marine boundary layer are poorly understood and therefore need more investigation. Here, we have used ion chromatography (IC) in anion mode to measure short-chain organic acids concentrations in SSA collected throughout a custom-made SSA simulation chamber. The enrichment behavior and morphology of monocarboxylic acids (MAs, C1-8) and dicarboxylic acids (DAs) in submicron SSA were studied in seawater. We found that with MAs addition, the number concentration and mass concentration of SSA particles decreased gradually for C5-8 MAs, whereas they weakly varied with DAs addition due to the fact that carboxyl groups at both ends of DAs increased the surface tension of seawater. Moreover, the target compounds in submicron SSA displayed a surface activity-dependent enrichment behavior, where seawater with stronger surface activity, such as that containing MAs with >5 carbons, was more enriched in SSA in comparison to seawater with weaker surface activity. MAs with chain length <5 carbons were slightly enriched in SSA, whereas the enrichment factor (EF) of C5-8 MAs further increased with increasing chain length. These findings are of utmost importance in further understanding and quantifying the contribution of organic matter to SSA, which is crucial for assessing the atmosphere feedback of the marine carbon cycle. MAIN FINDING OF THE WORK: Surface tension of seawater is the key factor affecting the enrichment of short-chain organic acids in SSA.
Collapse
Affiliation(s)
- Yaru Song
- Environment Research Institute, Shandong University, Qingdao 266237, China
| | - Jianlong Li
- Environment Research Institute, Shandong University, Qingdao 266237, China
| | - Narcisse T Tsona
- Environment Research Institute, Shandong University, Qingdao 266237, China
| | - Lingrui Liu
- Environment Research Institute, Shandong University, Qingdao 266237, China
| | - Lin Du
- Environment Research Institute, Shandong University, Qingdao 266237, China.
| |
Collapse
|
6
|
Franklin EB, Amiri S, Crocker D, Morris C, Mayer K, Sauer JS, Weber RJ, Lee C, Malfatti F, Cappa CD, Bertram TH, Prather KA, Goldstein AH. Anthropogenic and Biogenic Contributions to the Organic Composition of Coastal Submicron Sea Spray Aerosol. Environ Sci Technol 2022; 56:16633-16642. [PMID: 36332100 DOI: 10.1021/acs.est.2c04848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The organic composition of coastal sea spray aerosol is important for both atmospheric chemistry and public health but remains poorly characterized. Coastal waters contain an organic material derived from both anthropogenic processes, such as wastewater discharge, and biological processes, including biological blooms. Here, we probe the chemical composition of the organic fraction of sea spray aerosol over the course of the 2019 SeaSCAPE mesocosm experiment, in which a phytoplankton bloom was facilitated in natural coastal water from La Jolla, California. We apply untargeted two-dimensional gas chromatography to characterize submicron nascent sea spray aerosol samples, reporting ∼750 unique organic species traced over a 19 day phytoplankton bloom experiment. Categorization and quantitative compositional analysis reveal three major findings. First, anthropogenic species made up 30% of total submicron nascent sea spray aerosol organic mass under the pre-bloom condition. Second, biological activity drove large changes within the aerosolized carbon pool, decreasing the anthropogenic mass fraction by 89% and increasing the biogenic and biologically transformed fraction by a factor of 5.6. Third, biogenic marine organics are underrepresented in mass spectral databases in comparison to marine organic pollutants, with more than twice as much biogenic aerosol mass attributable to unlisted compounds.
Collapse
Affiliation(s)
- Emily B Franklin
- Department of Civil and Environmental Engineering, University of California Berkeley, Berkeley, California94720, United States
| | - Sarah Amiri
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, California92093, United States
| | - Daniel Crocker
- Department of Chemistry & Biochemistry, University of California San Diego, La Jolla, California92093, United States
| | - Clare Morris
- Department of Chemistry & Biochemistry, University of California San Diego, La Jolla, California92093, United States
| | - Kathryn Mayer
- Department of Chemistry & Biochemistry, University of California San Diego, La Jolla, California92093, United States
| | - Jonathan S Sauer
- Department of Chemistry & Biochemistry, University of California San Diego, La Jolla, California92093, United States
| | - Robert J Weber
- Department of Environmental Science, Policy and Management, University of California, Berkeley, Berkeley, California94720, United States
| | - Christopher Lee
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, California92093, United States
| | - Francesca Malfatti
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, California92093, United States
- Department of Life Sciences, University of Trieste, Trieste34100, Italy
| | - Christopher D Cappa
- Department of Civil and Environmental Engineering, University of California Davis, Davis, California95616, United States
| | - Timothy H Bertram
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin53706, United States
| | - Kimberly A Prather
- Department of Chemistry & Biochemistry, University of California San Diego, La Jolla, California92093, United States
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, California92093, United States
| | - Allen H Goldstein
- Department of Civil and Environmental Engineering, University of California Berkeley, Berkeley, California94720, United States
- Department of Environmental Science, Policy and Management, University of California, Berkeley, Berkeley, California94720, United States
| |
Collapse
|
7
|
Monroe LW, Johnson JS, Gutstein HB, Lawrence JP, Lejeune K, Sullivan RC, Jen CN. Preventing spread of aerosolized infectious particles during medical procedures: A lab-based analysis of an inexpensive plastic enclosure. PLoS One 2022; 17:e0273194. [PMID: 36137079 PMCID: PMC9499281 DOI: 10.1371/journal.pone.0273194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 08/03/2022] [Indexed: 11/25/2022] Open
Abstract
Severe viral respiratory diseases, such as SARS-CoV-2, are transmitted through aerosol particles produced by coughing, talking, and breathing. Medical procedures including tracheal intubation, extubation, dental work, and any procedure involving close contact with a patient’s airways can increase exposure to infectious aerosol particles. This presents a significant risk for viral exposure of nearby healthcare workers during and following patient care. Previous studies have examined the effectiveness of plastic enclosures for trapping aerosol particles and protecting health-care workers. However, many of these enclosures are expensive or are burdensome for healthcare workers to work with. In this study, a low-cost plastic enclosure was designed to reduce aerosol spread and viral transmission during medical procedures, while also alleviating issues found in the design and use of other medical enclosures to contain aerosols. This enclosure is fabricated from clear polycarbonate for maximum visibility. A large single-side cutout provides health care providers with ease of access to the patient with a separate cutout for equipment access. A survey of medical providers in a local hospital network demonstrated their approval of the enclosure’s ease of use and design. The enclosure with appropriate plastic covers reduced total escaped particle number concentrations (diameter > 0.01 μm) by over 93% at 8 cm away from all openings. Concentration decay experiments indicated that the enclosure without active suction should be left on the patient for 15–20 minutes following a tracheal manipulation to allow sufficient time for >90% of aerosol particles to settle upon interior surfaces. This decreases to 5 minutes when 30 LPM suction is applied. This enclosure is an inexpensive, easily implemented additional layer of protection that can be used to help contain infectious or otherwise potentially hazardous aerosol particles while providing access into the enclosure.
Collapse
Affiliation(s)
- Luke W. Monroe
- Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA, United States of America
| | - Jack S. Johnson
- Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA, United States of America
| | - Howard B. Gutstein
- Anesthesiology Institute, Allegheny Health Network, Pittsburgh, PA, United States of America
| | - John P. Lawrence
- Anesthesiology Institute, Allegheny Health Network, Pittsburgh, PA, United States of America
| | - Keith Lejeune
- Anesthesiology Institute, Allegheny Health Network, Pittsburgh, PA, United States of America
| | - Ryan C. Sullivan
- Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA, United States of America
- * E-mail:
| | - Coty N. Jen
- Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA, United States of America
| |
Collapse
|
8
|
Kim C, Yu J, Lee YG, Kim J, Bae S. Identifying behavior of long-distance virus transmission and mitigation performance from a COVID-19 outbreak of a daycare center. Environ Res 2022; 212:113318. [PMID: 35461843 PMCID: PMC9022399 DOI: 10.1016/j.envres.2022.113318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 04/11/2022] [Accepted: 04/12/2022] [Indexed: 06/14/2023]
Abstract
During the last two years, hundreds of millions of people in the world have been infected with SARS-CoV-2 due to recurrent waves and closed spaces. Daycare centers are critical infrastructures that cannot be replaced, even during the COVID-19 period. However, the existing settings in daycare centers may pose risks of inevitable close contact between teachers and children, as well as fomite and airborne transmission during care hours. Therefore, reinforced mitigation strategies have been applied in daycare centers to reduce potential indoor virus transfer in many countries. However, numerous outbreaks of COVID-19 have been reported in daycare centers. Therefore, in this study, researchers focused on the risk and behavior of long-distance virus transmission based on the detected viruses on air purifier filter sampling in a daycare center outbreak in Korea. Various experiments of possible situations were conducted in nursing rooms based on field interviews. The experiments monitored the long-distance transmission behavior of aerosol-sized particles and visualized particle behavior at the daycare center. The results of this study revealed that long-distance virus transmission is possible under the current settings in the daycare center, and flush-out can be an important countermeasure with reinforced ventilation methods to prevent potential airborne spread in the daycare center. The results of air purifiers represented that air purifiers should be properly installed and operated in the daycare center to prevent airborne virus spread by airflow during occupied hours. The findings of this study will contribute to the understanding of airborne virus risk and the development of customized virus measures for daycare centers.
Collapse
Affiliation(s)
- Chul Kim
- Department of Building Research, Korea Institute of Civil Engineering and Building Technology, Goyang-Si, 10223, South Korea
| | - Jungyeon Yu
- Department of Building Research, Korea Institute of Civil Engineering and Building Technology, Goyang-Si, 10223, South Korea
| | - Yun Gyu Lee
- Department of Building Research, Korea Institute of Civil Engineering and Building Technology, Goyang-Si, 10223, South Korea
| | - Jieun Kim
- Chungcheong Regional Center for Disease Control and Prevention, Daejeon, 35233, South Korea
| | - Sanghwan Bae
- Department of Building Research, Korea Institute of Civil Engineering and Building Technology, Goyang-Si, 10223, South Korea.
| |
Collapse
|
9
|
Dall'Osto M, Sotomayor-Garcia A, Cabrera-Brufau M, Berdalet E, Vaqué D, Zeppenfeld S, van Pinxteren M, Herrmann H, Wex H, Rinaldi M, Paglione M, Beddows D, Harrison R, Avila C, Martin-Martin RP, Park J, Barbosa A. Leaching material from Antarctic seaweeds and penguin guano affects cloud-relevant aerosol production. Sci Total Environ 2022; 831:154772. [PMID: 35364145 DOI: 10.1016/j.scitotenv.2022.154772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 03/12/2022] [Accepted: 03/19/2022] [Indexed: 06/14/2023]
Abstract
Within the Southern Ocean, the greatest warming is occurring on the Antarctic Peninsula (AP) where clear cryospheric and biological consequences are being observed. Antarctic coastal systems harbour a high diversity of marine and terrestrial ecosystems heavily influenced by Antarctic seaweeds (benthonic macroalgae) and bird colonies (mainly penguins). Primary sea spray aerosols (SSA) formed by the outburst of bubbles via the sea-surface microlayer depend on the organic composition of the sea water surface. In order to gain insight into the influence of ocean biology and biogeochemistry on atmospheric aerosol, we performed in situ laboratory aerosol bubble chamber experiments to study the effect of different leachates of biogenic material - obtained from common Antarctic seaweeds as well as penguin guano - on primary SSA. The addition of different leachate materials on a seawater sample showed a dichotomous effect depending on the leachate material added - either suppressing (up to 52%) or enhancing (22-88%) aerosol particle production. We found high ice nucleating particle number concentrations resulting from addition of guano leachate material. Given the evolution of upper marine polar coastal ecosystems in the AP, further studies on ocean-atmosphere coupling are needed in order to represent the currently poorly understood climate feedback processes.
Collapse
Affiliation(s)
- Manuel Dall'Osto
- Department of Marine Biology and Oceanography, Institute of Marine Sciences (CSIC), Pg. Marítim de la Barceloneta, 37-49, E-08003 Barcelona, Catalonia, Spain.
| | - Ana Sotomayor-Garcia
- Department of Marine Biology and Oceanography, Institute of Marine Sciences (CSIC), Pg. Marítim de la Barceloneta, 37-49, E-08003 Barcelona, Catalonia, Spain
| | - Miguel Cabrera-Brufau
- Department of Marine Biology and Oceanography, Institute of Marine Sciences (CSIC), Pg. Marítim de la Barceloneta, 37-49, E-08003 Barcelona, Catalonia, Spain
| | - Elisa Berdalet
- Department of Marine Biology and Oceanography, Institute of Marine Sciences (CSIC), Pg. Marítim de la Barceloneta, 37-49, E-08003 Barcelona, Catalonia, Spain
| | - Dolors Vaqué
- Department of Marine Biology and Oceanography, Institute of Marine Sciences (CSIC), Pg. Marítim de la Barceloneta, 37-49, E-08003 Barcelona, Catalonia, Spain
| | - Sebastian Zeppenfeld
- Atmospheric Chemistry Department (ACD), Leibniz-Institute for Tropospheric Research (TROPOS), D-04318 Leipzig, Germany
| | - Manuela van Pinxteren
- Atmospheric Chemistry Department (ACD), Leibniz-Institute for Tropospheric Research (TROPOS), D-04318 Leipzig, Germany
| | - Hartmut Herrmann
- Atmospheric Chemistry Department (ACD), Leibniz-Institute for Tropospheric Research (TROPOS), D-04318 Leipzig, Germany
| | - Heike Wex
- Experimental Aerosol and Cloud Microphysics Department, Leibniz-Institute for Tropospheric Research (TROPOS), D-04318 Leipzig, Germany
| | - Matteo Rinaldi
- National Research Council, Institute of Atmospheric Sciences and Climate, Bologna, Italy
| | - Marco Paglione
- National Research Council, Institute of Atmospheric Sciences and Climate, Bologna, Italy
| | - David Beddows
- National Centre for Atmospheric Science Division of Environmental Health & Risk Management School of Geography, Earth & Environmental Sciences University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Roy Harrison
- National Centre for Atmospheric Science Division of Environmental Health & Risk Management School of Geography, Earth & Environmental Sciences University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Conxita Avila
- Department of Evolutionary Biology, Ecology, and Environmental Sciences, University of Barcelona & Biodiversity Research Institute (IRBio), Av. Diagonal 643, 08028 Barcelona, Catalonia, Spain
| | - Rafael P Martin-Martin
- Department of Evolutionary Biology, Ecology, and Environmental Sciences, University of Barcelona & Biodiversity Research Institute (IRBio), Av. Diagonal 643, 08028 Barcelona, Catalonia, Spain
| | - Jiyeon Park
- Korea Polar Research Institute, 26 Songdomirae-ro, Yeonsu-gu, Incheon 21990, South Korea
| | - Andrés Barbosa
- Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales, CSIC, C/José Gutiérrez Abascal, 2, 28006 Madrid, Spain
| |
Collapse
|
10
|
Crocker DR, Kaluarachchi CP, Cao R, Dinasquet J, Franklin EB, Morris CK, Amiri S, Petras D, Nguyen T, Torres RR, Martz TR, Malfatti F, Goldstein AH, Tivanski AV, Prather KA, Thiemens MH. Isotopic Insights into Organic Composition Differences between Supermicron and Submicron Sea Spray Aerosol. Environ Sci Technol 2022; 56:9947-9958. [PMID: 35763461 DOI: 10.1021/acs.est.2c02154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
To elucidate the seawater biological and physicochemical factors driving differences in organic composition between supermicron and submicron sea spray aerosol (SSAsuper and SSAsub), carbon isotopic composition (δ13C) measurements were performed on size-segregated, nascent SSA collected during a phytoplankton bloom mesocosm experiment. The δ13C measurements indicate that SSAsuper contains a mixture of particulate and dissolved organic material in the bulk seawater. After phytoplankton growth, a greater amount of freshly produced carbon was observed in SSAsuper with the proportional contribution being modulated by bacterial activity, emphasizing the importance of the microbial loop in controlling the organic composition of SSAsuper. Conversely, SSAsub exhibited no apparent relationship with biological activity but tracked closely with surface tension measurements probing the topmost ∼0.2-1.5 μm of the sea surface microlayer. This probing depth is similar to a bubble's film thickness at the ocean surface, suggesting that SSAsub organic composition may be influenced by the presence of surfactants at the air-sea interface that are transferred into SSAsub by bubble bursting. Our findings illustrate the substantial impact of seawater dynamics on the pronounced organic compositional differences between SSAsuper and SSAsub and demonstrate that these two SSA populations should be considered separately when assessing their contribution to marine aerosols and climate.
Collapse
Affiliation(s)
- Daniel R Crocker
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | | | - Ruochen Cao
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Julie Dinasquet
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, United States
| | - Emily B Franklin
- Department of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States
| | - Clare K Morris
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, United States
| | - Sarah Amiri
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, United States
| | - Daniel Petras
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, United States
| | - Tran Nguyen
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, United States
| | - Ralph R Torres
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, United States
| | - Todd R Martz
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, United States
| | - Francesca Malfatti
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, United States
- University of Trieste, Trieste 34100, Italy
- OGS (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale), Trieste 34100, Italy
| | - Allen H Goldstein
- Department of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States
- Department of Environmental Science, Policy and Management, University of California, Berkeley, California 94720, United States
| | - Alexei V Tivanski
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Kimberly A Prather
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, United States
| | - Mark H Thiemens
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| |
Collapse
|
11
|
Hunt N, Masiewicz S, Herbert L, Bassin B, Brent C, Haas NL, Tiba MH, Lillemoen J, Lowell MJ, Lott I, Basinger M, Smith G, Ward KR. Novel Negative Pressure Procedural Tent Reduces Aerosolized Particles in a Simulated Prehospital Setting. Prehosp Disaster Med 2022; 37:383-389. [PMID: 35379372 PMCID: PMC9118043 DOI: 10.1017/s1049023x22000474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 12/28/2021] [Accepted: 01/11/2022] [Indexed: 11/25/2022]
Abstract
BACKGROUND/OBJECTIVE The coronavirus disease 2019 (COVID-19) pandemic has challenged the ability of Emergency Medical Services (EMS) providers to maintain personal safety during the treatment and transport of patients potentially infected. Increased rates of COVID-19 infection in EMS providers after patient care exposure, and notably after performing aerosol-generating procedures (AGPs), have been reported. With an already strained workforce seeing rising call volumes and increased risk for AGP-requiring patient presentations, development of novel devices for the protection of EMS providers is of great importance.Based on the concept of a negative pressure room, the AerosolVE BioDome is designed to encapsulate the patient and contain aerosolized infectious particles produced during AGPs, making the cabin of an EMS vehicle safer for providers. The objective of this study was to determine the efficacy and safety of the tent in mitigating simulated infectious particle spread in varied EMS transport platforms during AGP utilization. METHODS Fifteen healthy volunteers were enrolled and distributed amongst three EMS vehicles: a ground ambulance, an aeromedical-configured helicopter, and an aeromedical-configured jet. Sodium chloride particles were used to simulate infectious particles and particle counts were obtained in numerous locations close to the tent and around the patient compartment. Counts near the tent were compared to ambient air with and without use of AGPs (non-rebreather mask, continuous positive airway pressure [CPAP] mask, and high-flow nasal cannula [HFNC]). RESULTS For all transport platforms, with the tent fan off, the particle generator alone, and with all AGPs produced particle counts inside the tent significantly higher than ambient particle counts (P <.0001). With the tent fan powered on, particle counts near the tent, where EMS providers are expected to be located, showed no significant elevation compared to baseline ambient particle counts during the use of the particle generator alone or with use of any of the AGPs across all transport platforms. CONCLUSION Development of devices to improve safety for EMS providers to allow for use of all available therapies to treat patients while reducing risk of communicable respiratory disease transmission is of paramount importance. The AerosolVE BioDome demonstrated efficacy in creating a negative pressure environment and workspace around the patient and provided significant filtration of simulated respiratory droplets, thus making the confined space of transport vehicles potentially safer for EMS personnel.
Collapse
Affiliation(s)
- Nathaniel Hunt
- Department of Emergency Medicine, University of Michigan, Ann Arbor, MichiganUSA
- Michigan Center for Integrative Research in Critical Care, Ann Arbor, MichiganUSA
| | - Spencer Masiewicz
- Department of Emergency Medicine, Northeast Georgia Medical Center, Gainesville, Georgia USA
| | - Logan Herbert
- Department of Emergency Medicine, University of Michigan, Ann Arbor, MichiganUSA
| | - Benjamin Bassin
- Department of Emergency Medicine, University of Michigan, Ann Arbor, MichiganUSA
- Michigan Center for Integrative Research in Critical Care, Ann Arbor, MichiganUSA
- Division of Critical Care, Department of Emergency Medicine, University of Michigan, Ann Arbor, MichiganUSA
| | - Christine Brent
- Department of Emergency Medicine, University of Michigan, Ann Arbor, MichiganUSA
- Michigan Center for Integrative Research in Critical Care, Ann Arbor, MichiganUSA
- Division of Critical Care, Department of Emergency Medicine, University of Michigan, Ann Arbor, MichiganUSA
| | - Nathan L. Haas
- Department of Emergency Medicine, University of Michigan, Ann Arbor, MichiganUSA
- Michigan Center for Integrative Research in Critical Care, Ann Arbor, MichiganUSA
- Division of Critical Care, Department of Emergency Medicine, University of Michigan, Ann Arbor, MichiganUSA
| | - Mohamad Hakam Tiba
- Department of Emergency Medicine, University of Michigan, Ann Arbor, MichiganUSA
- Michigan Center for Integrative Research in Critical Care, Ann Arbor, MichiganUSA
| | - Jon Lillemoen
- University of Michigan Environment, Health and Safety, Ann Arbor, MichiganUSA
| | - Mark J. Lowell
- Department of Emergency Medicine, University of Michigan, Ann Arbor, MichiganUSA
- Michigan Center for Integrative Research in Critical Care, Ann Arbor, MichiganUSA
| | - Isabel Lott
- University of Michigan Medical School, Ann Arbor, MichiganUSA
| | - Matthew Basinger
- Department of Emergency Medicine, University of Michigan, Ann Arbor, MichiganUSA
| | - Graham Smith
- Department of Emergency Medicine, University of Michigan, Ann Arbor, MichiganUSA
- Michigan Center for Integrative Research in Critical Care, Ann Arbor, MichiganUSA
| | - Kevin R. Ward
- Department of Emergency Medicine, University of Michigan, Ann Arbor, MichiganUSA
- Michigan Center for Integrative Research in Critical Care, Ann Arbor, MichiganUSA
| |
Collapse
|
12
|
He J, Zhang H, Ma Y, He Y, Liu Z, Liu J, Wang S, Liu Y, Yu K, Jiang J. Sea spray aerosols intervening phospholipids ozonolysis at the air-water interface. J Hazard Mater 2022; 430:128466. [PMID: 35739660 DOI: 10.1016/j.jhazmat.2022.128466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 01/22/2022] [Accepted: 02/08/2022] [Indexed: 06/15/2023]
Abstract
With more than half of the world's population lives along the coast and in its vicinity, the sea spray aerosols (SSAs) with respect to respiratory system impact has attracted increasing attention. In this paper, ozonolysis of model lung phospholipids intervened by salt cations in SSAs at air-water interface was investigated using acoustic levitation-nano-electrospray ionization-mass spectrometry (AL-nano-ESI-MS). The cation species facilitated the interfacial ozonolysis of phospholipids, and this increased ozonolysis showed a dependence on the concentration of salt cations. The charge number and ion radius of salt cations were also investigated, and the times of increased efficiency for phospholipids ozonolysis at the air-water interface were higher with more charge numbers or lower ion radius. The mechanism study revealed that the electrostatic interaction between the electronegative headgroup of phospholipids and the cations disturbed the packing of phospholipids, and resulted in oleyl chains more vulnerable with ozone. Finally, aerosolization of the salt-dominated artificial seawater and real seawater revealed a significant increase on ozonolysis of phospholipid intervened by salt cations. These results reveal SSAs intervening phospholipids interfacial reaction at the molecule level, which will be beneficial to gain the knowledge of the negative health effect concerning the components involved in SSAs.
Collapse
Affiliation(s)
- Jing He
- School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, Shandong 264209, PR China; School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, PR China
| | - Hong Zhang
- School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, Shandong 264209, PR China.
| | - Yingxue Ma
- School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, Shandong 264209, PR China
| | - Yuwei He
- School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, Shandong 264209, PR China
| | - Zhuo Liu
- School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, Shandong 264209, PR China
| | - Junyu Liu
- School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, Shandong 264209, PR China
| | - Sheng Wang
- School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, Shandong 264209, PR China
| | - Yaqi Liu
- School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, Shandong 264209, PR China
| | - Kai Yu
- School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai, Shandong 264209, PR China
| | - Jie Jiang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, Heilongjiang 150090, PR China; School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, PR China.
| |
Collapse
|
13
|
Xu M, Tsona NT, Li J, Du L. Atmospheric chemical processes of microcystin-LR at the interface of sea spray aerosol. Chemosphere 2022; 294:133726. [PMID: 35085608 DOI: 10.1016/j.chemosphere.2022.133726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 01/06/2022] [Accepted: 01/20/2022] [Indexed: 06/14/2023]
Abstract
Microcystins are the most toxic toxins released by cyanobacteria and they have adverse effects on aquatic ecosystems and even human health. Although the removal and detoxification of microcystins in various water bodies have been extensively studied, the interaction mechanism and reaction process of microcystins once they enter the atmosphere are largely unknown, especially at the organic-enriched sea spray aerosol (SSA) interface. Herein, using the surface technique of Langmuir trough coupled in-situ infrared reflection-absorption spectra, we studied the interfacial behavior of microcystin-LR (MC-LR) in artificial seawater containing humic acid and typical surfactants in the presence or absence of UV-irradiation. Zwitterionic 1,2-distearoyl-sn-glycero-3-phosphocholine (DSPC) and anionic stearic acid (SA) were chosen as typical film-forming species, results obtained from the surface pressure-area isotherms showed that MC-LR caused greater expansion of the DSPC monolayer. The comparable results of MC-LR in DSPC/SA-containing systems indicated that the interaction ability was closely related to the monolayer molecular structure and was regulated by electrostatic interaction. Furthermore, the presence of humic acid (HA) could enhance the interaction between microcystin and monolayer molecules. UV-irradiation experiments showed that the photosensitized reaction greatly promoted the removal of microcystin embedded in the SSA surface compared with the direct photolysis effect in the absence of HA. These findings highlight that the toxic effects of microcystins after entering the atmosphere may be weakened by photochemical reactions.
Collapse
Affiliation(s)
- Minglan Xu
- Environment Research Institute, Shandong University, Binhai Road 72, Qingdao, 266237, China
| | - Narcisse T Tsona
- Environment Research Institute, Shandong University, Binhai Road 72, Qingdao, 266237, China
| | - Jianlong Li
- Environment Research Institute, Shandong University, Binhai Road 72, Qingdao, 266237, China
| | - Lin Du
- Environment Research Institute, Shandong University, Binhai Road 72, Qingdao, 266237, China.
| |
Collapse
|
14
|
Gong C, Li D, Kang C. Visualization of the evolution of bubbles in the spray sheet discharged from the air-induction nozzle. Pest Manag Sci 2022; 78:1850-1860. [PMID: 35060319 DOI: 10.1002/ps.6803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 01/11/2022] [Accepted: 01/20/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND The air-induction nozzle greatly reduces drift potential by increasing spray droplet size compared with a standard flat-fan nozzle. The current study aims to reveal the mechanism behind the formation of large droplets through the air-induction nozzle from the aspect of bubble evolution in the spray sheet. RESULTS Bubble break-up leads directly to the formation of perforations because large bubbles reach both sides of the spray sheet. The surface disturbance induced by bubble break-up modulates spray sheet thickness, which indirectly leads to the generation of perforations. Compared with the spray pressure, nozzle configuration has a more significant effect on both the volumetric flow rate of intake air and the thickness of the spray sheet. As the nozzle is changed from ID-120-01 to ID-120-05, the volumetric flow rate of intake air increases by 801.30% at a spray pressure of 0.3 MPa, whereas spray sheet thickness increases by 412.50% at a radial distance of 10 mm. CONCLUSION Bubble break-up is the main reason for the generation of perforations within an air-induction nozzle, leading to early break-up of the spray sheet and the production of large spray droplets. Bubble break-up can be effectively controlled by modifying the nozzle configuration.
Collapse
Affiliation(s)
- Chen Gong
- School of Agricultural Engineering, Jiangsu University, Zhenjiang, China
| | - Dongyang Li
- School of Agricultural Engineering, Jiangsu University, Zhenjiang, China
| | - Can Kang
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang, China
| |
Collapse
|
15
|
Liu L, Du L, Xu L, Li J, Tsona NT. Molecular size of surfactants affects their degree of enrichment in the sea spray aerosol formation. Environ Res 2022; 206:112555. [PMID: 34922983 DOI: 10.1016/j.envres.2021.112555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 11/25/2021] [Accepted: 12/09/2021] [Indexed: 06/14/2023]
Abstract
Sea spray aerosol (SSA), the largest source of natural primary aerosol, plays an important role in atmospheric chemical processes and the earth radiation balance. Its formation process is controlled by many factors. In this study, ethylene glycol (EG) and polyethylene glycol (PEG) with three different molecular weights (200, 400, 600) were used to investigate the influence of molecular size on the properties of submicron SSA produced by plunging jet from an adjustable home-built SSA generator. Different parameters were tested to obtain the optimum experimental conditions. The addition of EG and PEG inhibited the production of SSA and increased the geometric mean diameter (GMD) between 10 and 35 nm. However, PEG with a molecular weight of 600 could promote the production of SSA at higher concentrations, which means that the molecular weight and concentration of the polymer would affect the production efficiency of SSA. Combining with the measurement of surface tension, we found no clear relationship between surface tension and the yield of SSA, due to the properties of the substances themselves. Transmission electron microscopy images show that the addition of EG and PEG could significantly change the structure of salt nuclei in SSA. PEG was significantly enriched in SSA (with enrichment factors within the range 92.9-133.4), and the enrichment was independent of the sampling time, while increasing with the increase of molecular weight. Our results highlight the influence of polymer molecular weight on the properties of SSA, and their importance to improve the accuracy of aerosol emission model parameters.
Collapse
Affiliation(s)
- Lingrui Liu
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Lin Du
- Environment Research Institute, Shandong University, Qingdao, 266237, China.
| | - Li Xu
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Jianlong Li
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Narcisse T Tsona
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| |
Collapse
|
16
|
Ishmatov A. "SARS-CoV-2 is transmitted by particulate air pollution": Misinterpretations of statistical data, skewed citation practices, and misuse of specific terminology spreading the misconception. Environ Res 2022; 204:112116. [PMID: 34562486 PMCID: PMC8489301 DOI: 10.1016/j.envres.2021.112116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/14/2021] [Accepted: 09/21/2021] [Indexed: 05/03/2023]
Abstract
In epidemiology, there are still outdated myths associated with the spread of respiratory infections. Recently, we have witnessed the origination of a new misconception, to the effect that SARS-CoV-2 is transmitted in the open air by way of particulate air pollution (atmospheric particulate matter (PM)). There is no evidence to support the idea behind this misconception. Nevertheless, more and more people are involved in animated debate and the number of studies concerning atmospheric PM as a carrier of SARS-CoV-2 is growing rapidly. In this work, the origin of the misconception was investigated, and the published papers which have contributed to the spread of this myth were analyzed. The results show that the following factors lie behind the origin and spread of the misconception: a) The specific terminology is not always clearly defined or consistently used by scientists. In particular, the terms 'particulate matter', 'atmospheric aerosol particles', 'air pollutants', and 'atmospheric aerosols' need to be clarified, and besides they are often equated to 'infectious aerosols', 'virus-bearing aerosols', 'bio-aerosols', 'virus-laden particles', 'respiratory aerosol/droplets', and 'droplet nuclei'. b) Authors misinterpret statistical data and information from other sources. Interpretation of the correlation between PM levels and the increasing incidence and severity of COVID-19 infection, is often changed from "PM may reflect the indirect action of certain atmospheric conditions that maintain infectious nuclei suspended for prolonged periods, parameters that also act on atmospheric pollutants" to "PM could cause an increase in infectious droplets/aerosols containing SARS-CoV-2." This is a dramatic change to the meaning. Moreover, it is often not taken into account that PM may reflect activities in areas with high population density and this population density at the same time contributes to the spread COVID-19. c) Skewed citation practices. Many authors cite a hypothetical conclusion from an original study, then other authors cite the papers of these authors as primary sources. This practice leads to the effect that there are many witnesses to a 'phenomenon' that did not ever occur. Thus, the terminology used in interdisciplinary communications should be more nuanced and defined precisely. Authors should be more careful when citing unconfirmed data (and hypotheses) as well as in interpreting statistical data so as to avoid confusion and spreading false information. This is especially important now in the era of the COVID-19 pandemic.
Collapse
Affiliation(s)
- Alexander Ishmatov
- Research Institute of Experimental and Clinical Medicine, Timakova St., Bild. 2., Novosibirsk, 630117, Russian Federation; Kazan Federal University, Kremlyovskaya St. 18, Kazan, 420008, Russian Federation; Togliatti State University, Belorusskaya St. 14, Togliatti, 445020, Russian Federation.
| |
Collapse
|
17
|
Abstract
Emergence and spread of malaria vectors resistant to the available insecticides required a new and efficacious insecticide. Residual efficacy of Fludora® Fusion was evaluated against insecticide susceptible Anopheles arabiensis in ten circular huts similar to the residential huts. Fludora® Fusion WP-SB 56.25, FICAM WP80 and Clothianidin WG70 were sprayed, by experienced technician, on interior wall surfaces: paint, dung, smooth mud, and rough mud. WHO cone bioassays were carried out a month after spraying and thereafter on monthly intervals for 12 months. Knockdown was recorded at 60 minutes and mortality at 24 hours, 48 hours and 72 hours holding time post-exposure. Fludora Fusion induced 100% An. arabiensis mortality during the first four months post-treated on all surface types at 24 hours holding time post-exposure. Its activity remained over 80% from the fifth to the twelfth month post-treated on the surfaces with the exception of two assessment points, at seventh month and eleventh month, on paint and smooth mud surfaces. FICAM induced 100% mortality rate during the first 4 months and 92% mortality during the fifth month post-treatment on painted surfaces. Its activity was over 96% mortality 1-month post-treatment on smooth mud and rough mud surfaces and 92% mortality 2-month post-treatment on dung surfaces. Clothianidin caused 89% and 86% mortality 1-month post-treatment on smooth mud and rough mud surfaces. Fludora Fusion can be used as alternative indoor residual insecticide spraying against An. arabiensis in Ethiopia.
Collapse
Affiliation(s)
- Abebe Animut
- Medical Entomology, Aklilu Lemma Institute of Pathobiology, Addis Ababa University, Addis Ababa, Ethiopia
- * E-mail: ,
| | - Sebastian Horstmann
- Research & Development, Bayer AG Crop Science, Laboratory Vector Control, Field Testing, Monheim, Germany
| |
Collapse
|
18
|
Sem K, Jang M, Pierce R, Blum P, Yu Z. Characterization of Atmospheric Processes of Brevetoxins in Sea Spray Aerosols from Red Tide Events. Environ Sci Technol 2022; 56:1811-1819. [PMID: 35050617 DOI: 10.1021/acs.est.1c05740] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Atmospheric processes can affect the longevity of harmful toxins in sea spray aerosols (SSA). This study characterized the degradation of brevetoxin (BTx) in SSA under different environmental conditions. The samples of seawater collected during a Karenia brevis bloom in Manasota, Florida, were nebulized into a large outdoor photochemical chamber to mimic the atmospheric oxidation of aerosolized toxins and then aged in the presence or absence of sunlight and/or O3. Aerosol samples were collected during the aging process using a Particle-Into-Liquid Sampler. Their BTx concentrations were measured using an enzyme-linked immuno-sorbent assay (ELISA) and high-performance liquid chromatography/tandem mass spectroscopy. The BTx ozonolysis rate constant measured by ELISA was 5.74 ± 0.21 × 103 M-1 s-1. The corresponding lifetime for decay of 87.5% BTx in the presence of 20 ppb of O3 was 7.08 ± 0.26 h, suggesting that aerosolized BTx can still travel long distances at night before SSA deposition. BTx concentrations in SSA decreased more rapidly in the presence of sunlight than in its absence due to oxidation with photochemically produced OH radicals.
Collapse
Affiliation(s)
- Karen Sem
- Department of Environmental Engineering Sciences, University of Florida, P.O. Box 116450, Gainesville, Florida 32611, United States
| | - Myoseon Jang
- Department of Environmental Engineering Sciences, University of Florida, P.O. Box 116450, Gainesville, Florida 32611, United States
| | - Richard Pierce
- Mote Marine Laboratory, 1600 Ken Thompson Parkway, Sarasota, Florida 34326, United States
| | - Patricia Blum
- Mote Marine Laboratory, 1600 Ken Thompson Parkway, Sarasota, Florida 34326, United States
| | - Zechen Yu
- Department of Environmental Engineering Sciences, University of Florida, P.O. Box 116450, Gainesville, Florida 32611, United States
| |
Collapse
|
19
|
Sha B, Johansson JH, Tunved P, Bohlin-Nizzetto P, Cousins IT, Salter ME. Sea Spray Aerosol (SSA) as a Source of Perfluoroalkyl Acids (PFAAs) to the Atmosphere: Field Evidence from Long-Term Air Monitoring. Environ Sci Technol 2022; 56:228-238. [PMID: 34907779 PMCID: PMC8733926 DOI: 10.1021/acs.est.1c04277] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The effective enrichment of perfluoroalkyl acids (PFAAs) in sea spray aerosols (SSA) demonstrated in previous laboratory studies suggests that SSA is a potential source of PFAAs to the atmosphere. In order to investigate the influence of SSA on atmospheric PFAAs in the field, 48 h aerosol samples were collected regularly between 2018 and 2020 at two Norwegian coastal locations, Andøya and Birkenes. Significant correlations (p < 0.05) between the SSA tracer ion, Na+, and PFAA concentrations were observed in the samples from both locations, with Pearson's correlation coefficients (r) between 0.4-0.8. Such significant correlations indicate SSA to be an important source of atmospheric PFAAs to coastal areas. The correlations in the samples from Andøya were observed for more PFAA species and were generally stronger than in the samples from Birkenes, which is located further away from the coast and closer to urban areas than Andøya. Factors such as the origin of the SSA, the distance of the sampling site to open water, and the presence of other PFAA sources (e.g., volatile precursor compounds) can have influence on the contribution of SSA to PFAA in air at the sampling sites and therefore affect the observed correlations between PFAAs and Na+.
Collapse
Affiliation(s)
- Bo Sha
- Department
of Environmental Science, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Jana H. Johansson
- Department
of Environmental Science, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Peter Tunved
- Department
of Environmental Science, Stockholm University, SE-106 91 Stockholm, Sweden
- Bolin
Centre for Climate Research, SE-106 91 Stockholm, Sweden
| | | | - Ian T. Cousins
- Department
of Environmental Science, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Matthew E. Salter
- Department
of Environmental Science, Stockholm University, SE-106 91 Stockholm, Sweden
- Bolin
Centre for Climate Research, SE-106 91 Stockholm, Sweden
| |
Collapse
|
20
|
Stewart IE, Durham PG, Sittenauer JM, Barreda AP, Stowell GW, Moody C, Mecham JB, Simpson C, Daily S, Maloney SE, Williams MD, Severynse-Stevens D, Hickey AJ. Optimization and Scale Up of Spray Dried CPZEN-45 Aerosol Powders for Inhaled Tuberculosis Treatment. Pharm Res 2022; 39:3359-3370. [PMID: 36114362 PMCID: PMC9483285 DOI: 10.1007/s11095-022-03393-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Accepted: 09/06/2022] [Indexed: 12/27/2022]
Abstract
PURPOSE Tuberculosis (TB) remains one of the most serious diseases caused by a single organism. Multiple (MDR) and extensively (XDR) drug resistant disease poses a threat to global health and requires new drugs and/or innovative approaches to treatment. A number of drugs have been proposed as inhaled therapy for TB, frequently prepared by spray drying. CPZEN-45 is a novel anti-tubercular drug that has poor oral bioavailability but has shown promise when administered via inhalation. METHODS Excipient-free CPZEN-45 HCl has been spray dried into a powder with physicochemical characteristics, aerodynamic particle size distribution, and delivered dose suitable for consideration as an inhaled product. RESULTS The mass median aerodynamic diameter (MMAD) and geometric standard deviation (GSD) of the powder delivered using a RS01 inhaler were 2.62 ± 0.04 μm and 1.76 ± 0.09, respectively. Additionally, the powder was physically and chemically stable after storage at ambient conditions for >1.5 years with particle size similar to freshly manufactured product. Overages in spray dried powder were recycled the powder and resprayed into drug product likewise resulting in negligible change in quality thus allowing for further preclinical characterization as necessary. CPZEN-45 was scaled up using pilot-scale manufacturing equipment where the density of the powder was increased to facilitate larger delivered doses without affecting the aerodynamic performance properties. CONCLUSION The spray dried powders were suitable for pharmacokinetics, efficacy and preclinical toxicology studies. The final method of manufacture may be used directly for CGMP particle manufacture to support IND and Phase I clinical trials and beyond.
Collapse
Affiliation(s)
- Ian E Stewart
- Technology Advancement and Commercialization, RTI International, Durham, NC, USA
| | - Phillip G Durham
- Department of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | | | | | - Grayson W Stowell
- Social, Statistical, and Environmental Sciences, RTI International, Durham, NC, USA
| | - Carmella Moody
- Social, Statistical, and Environmental Sciences, RTI International, Durham, NC, USA
| | - Jeffery B Mecham
- Technology Advancement and Commercialization, RTI International, Durham, NC, USA
| | - Catherine Simpson
- Social, Statistical, and Environmental Sciences, RTI International, Durham, NC, USA
| | - Sharon Daily
- Social, Statistical, and Environmental Sciences, RTI International, Durham, NC, USA
| | - Sara E Maloney
- Technology Advancement and Commercialization, RTI International, Durham, NC, USA
| | | | | | - Anthony J Hickey
- Technology Advancement and Commercialization, RTI International, Durham, NC, USA.
| |
Collapse
|
21
|
Miyaoka Y, Yamaguchi M, Kadota C, Hasan MA, Kabir MH, Shoham D, Murakami H, Takehara K. Rapid in vitro virucidal activity of slightly acidic hypochlorous acid water toward aerosolized coronavirus in simulated human-dispersed droplets. Virus Res 2022; 311:198701. [PMID: 35093473 PMCID: PMC8799933 DOI: 10.1016/j.virusres.2022.198701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/26/2021] [Accepted: 01/26/2022] [Indexed: 11/16/2022]
Abstract
The virucidal activities were evaluated by spraying slightly acidic hypochlorous acid waters (SAHWs) containing various concentrations of free available chlorine - 100, 200, 300 and 500 ppm (SAHW-100, -200, -300 and -500, respectively) - toward aerosol of an avian coronavirus (infectious bronchitis virus: IBV). The viral solution was supplemented with 0.5% fetal bovine serum (FBS) to simulate normal human droplets generated by sneezing or coughing in a real-life scenario. The virus containing 0.5% FBS was sprayed and exposed to SAHWs for a few seconds in a closed chamber, before reaching the air sampler. The results showed that IBV exposed to SAHW-100 and -200 for a few seconds decreased by 0.21 log10 and 0.80 log10, respectively, compared to the pre-exposed samples to SAHWs as controls. On the other hand, reductions of 1.16 log10 and 1.67 log10 were achieved following the exposure to SAHW-300 and -500, respectively, within a few seconds. These results suggest that SAHWs have rapid in vitro virucidal activity toward aerosolized IBV. The findings obtained for IBV might basically be applicable in relation to SARS-CoV-2, given the resemblance between the two viruses. To prevent human-to-human transmissions by aerosols, the inactivation of viruses in the air by exposure to SAHWs for a few seconds seems to be an effective way.
Collapse
Affiliation(s)
- Yu Miyaoka
- Laboratory of Animal Health, Cooperative Division of Veterinary Sciences, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
| | - Makiko Yamaguchi
- Laboratory of Animal Health, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
| | - Chisaki Kadota
- Laboratory of Animal Health, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
| | - Md Amirul Hasan
- Laboratory of Animal Health, Cooperative Division of Veterinary Sciences, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
| | - Md Humayun Kabir
- Laboratory of Animal Health, Cooperative Division of Veterinary Sciences, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
| | - Dany Shoham
- Bar-Ilan University, Begin-Sadat Center for Strategic Studies, Ramat Gan 5290002, Israel
| | - Harumi Murakami
- Laboratory of Animal Health, Cooperative Division of Veterinary Sciences, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan; Laboratory of Animal Health, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
| | - Kazuaki Takehara
- Laboratory of Animal Health, Cooperative Division of Veterinary Sciences, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan; Laboratory of Animal Health, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan.
| |
Collapse
|
22
|
Van Acker E, De Rijcke M, Liu Z, Asselman J, De Schamphelaere KAC, Vanhaecke L, Janssen CR. Sea Spray Aerosols Contain the Major Component of Human Lung Surfactant. Environ Sci Technol 2021; 55:15989-16000. [PMID: 34793130 DOI: 10.1021/acs.est.1c04075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Marine phytoplankton influence the composition of sea spray aerosols (SSAs) by releasing various compounds. The biogenic surfactant dipalmitoylphosphatidylcholine (DPPC) is known to accumulate in the sea surface microlayer, but its aerosolization has never been confirmed. We conducted a 1 year SSA sampling campaign at the Belgian coast and analyzed the SSA composition. We quantified DPPC at a median and maximum air concentration of 7.1 and 33 pg m-3, respectively. This discovery may be of great importance for the field linking ocean processes to human health as DPPC is the major component of human lung surfactant and is used as excipient in medical aerosol therapy. The natural airborne exposure to DPPC seems too low to induce direct human health effects but may facilitate the effects of other marine bioactive compounds. By analyzing various environmental variables in relation to the DPPC air concentration, using a generalized linear model, we established that wave height is a key environmental predictor and that it has an inverse relationship. We also demonstrated that DPPC content in SSAs is positively correlated with enriched aerosolization of Mg2+ and Ca2+. In conclusion, our findings are not only important from a human health perspective but they also advance our understanding of the production and composition of SSAs.
Collapse
Affiliation(s)
- Emmanuel Van Acker
- Laboratory of Environmental Toxicology and Aquatic Ecology, Department of Animal Sciences and Aquatic Ecology, Ghent University, Campus Coupure, Coupure Links 653, Ghent 9000, Belgium
| | - Maarten De Rijcke
- Flanders Marine Institute (VLIZ), InnovOcean site, Wandelaarkaai 7, Ostend 8400, Belgium
| | - Zixia Liu
- Laboratory of Environmental Toxicology and Aquatic Ecology, Department of Animal Sciences and Aquatic Ecology, Ghent University, Campus Coupure, Coupure Links 653, Ghent 9000, Belgium
| | - Jana Asselman
- Laboratory of Environmental Toxicology and Aquatic Ecology, Department of Animal Sciences and Aquatic Ecology, Ghent University, Campus Coupure, Coupure Links 653, Ghent 9000, Belgium
- Blue Growth Research Lab, Ghent University, Campus Oostende, Wetenschapspark 1, Ostend 8400, Belgium
| | - Karel A C De Schamphelaere
- Laboratory of Environmental Toxicology and Aquatic Ecology, Department of Animal Sciences and Aquatic Ecology, Ghent University, Campus Coupure, Coupure Links 653, Ghent 9000, Belgium
| | - Lynn Vanhaecke
- Laboratory of Chemical Analysis, Faculty of Veterinary Medicine, Ghent University, Campus Merelbeke, Salisburylaan 133, Merelbeke 9820, Belgium
- Queen's University Belfast, School of Biological Sciences, Lisburn Road 97, Belfast BT7 1NN, United Kingdom
| | - Colin R Janssen
- Laboratory of Environmental Toxicology and Aquatic Ecology, Department of Animal Sciences and Aquatic Ecology, Ghent University, Campus Coupure, Coupure Links 653, Ghent 9000, Belgium
- Blue Growth Research Lab, Ghent University, Campus Oostende, Wetenschapspark 1, Ostend 8400, Belgium
| |
Collapse
|
23
|
Franklin EB, Alves MR, Moore AN, Kilgour DB, Novak GA, Mayer K, Sauer JS, Weber RJ, Dang D, Winter M, Lee C, Cappa CD, Bertram TH, Prather KA, Grassian VH, Goldstein AH. Atmospheric Benzothiazoles in a Coastal Marine Environment. Environ Sci Technol 2021; 55:15705-15714. [PMID: 34787411 DOI: 10.1021/acs.est.1c04422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Organic emissions from coastal waters play an important but poorly understood role in atmospheric chemistry in coastal regions. A mesocosm experiment focusing on facilitated biological blooms in coastal seawater, SeaSCAPE (Sea Spray Chemistry and Particle Evolution), was performed to study emission of volatile gases, primary sea spray aerosol, and formation of secondary marine aerosol as a function of ocean biological and chemical processes. Here, we report observations of aerosol-phase benzothiazoles in a marine atmospheric context with complementary measurements of dissolved-phase benzothiazoles. Though previously reported dissolved in polluted coastal waters, we report the first direct evidence of the transfer of these molecules from seawater into the atmosphere. We also report the first gas-phase observations of benzothiazole in the environment absent a direct industrial, urban, or rubber-based source. From the identities and temporal dynamics of the dissolved and aerosol species, we conclude that the presence of benzothiazoles in the coastal water (and thereby their emissions into the atmosphere) is primarily attributable to anthropogenic sources. Oxidation experiments to explore the atmospheric fate of gas-phase benzothiazole show that it produces secondary aerosol and gas-phase SO2, making it a potential contributor to secondary marine aerosol formation in coastal regions and a participant in atmospheric sulfur chemistry.
Collapse
Affiliation(s)
- Emily B Franklin
- Department of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States
| | - Michael R Alves
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Alexia N Moore
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Delaney B Kilgour
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Gordon A Novak
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Kathryn Mayer
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Jonathan S Sauer
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Robert J Weber
- Department of Environmental Science, Policy and Management, University of California, Berkeley, California 94720, United States
| | - Duyen Dang
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Margaux Winter
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Christopher Lee
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, United States
| | - Christopher D Cappa
- Department of Civil and Environmental Engineering, University of California, Davis, California 95616, United States
| | - Timothy H Bertram
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Kimberly A Prather
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, United States
| | - Vicki H Grassian
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, United States
| | - Allen H Goldstein
- Department of Civil and Environmental Engineering, University of California, Berkeley, California 94720, United States
- Department of Environmental Science, Policy and Management, University of California, Berkeley, California 94720, United States
| |
Collapse
|
24
|
Coleman S, Yihdego Y, Sherrard-Smith E, Thomas CS, Dengela D, Oxborough RM, Dadzie SK, Boakye D, Gyamfi F, Obiri-Danso K, Johns B, Siems LV, Lucas B, Tongren JE, Zigirumugabe S, Dery D, Fornadel C, George K, Belemvire A, Carlson J, Irish SR, Armistead JS, Seyoum A. Partial indoor residual spraying with pirimiphos-methyl as an effective and cost-saving measure for the control of Anopheles gambiae s.l. in northern Ghana. Sci Rep 2021; 11:18055. [PMID: 34508114 PMCID: PMC8433436 DOI: 10.1038/s41598-021-97138-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 08/19/2021] [Indexed: 11/09/2022] Open
Abstract
The scale up of indoor residual spraying (IRS) and insecticide treated nets have contributed significantly to global reductions in malaria prevalence over the last two decades. However, widespread pyrethroid resistance has necessitated the use of new and more expensive insecticides for IRS. Partial IRS with pirimiphos-methyl in experimental huts and houses in a village-wide trial was evaluated against Anopheles gambiae s.l. in northern Ghana. Four different scenarios in which either only the top or bottom half of the walls of experimental huts were sprayed, with or without also spraying the ceiling were compared. Mortality of An. gambiae s.l. on partially sprayed walls was compared with the standard procedures in which all walls and ceiling surfaces are sprayed. A small-scale trial was then conducted to assess the effectiveness, feasibility, and cost of spraying only the upper walls and ceiling as compared to full IRS and no spraying in northern Ghana. Human landing catches were conducted to estimate entomological indices and determine the effectiveness of partial IRS. An established transmission dynamics model was parameterized by an analysis of the experimental hut data and used to predict the epidemiological impact and cost effectiveness of partial IRS for malaria control in northern Ghana. In the experimental huts, partial IRS of the top (IRR 0.89, p = 0.13) or bottom (IRR 0.90, p = 0.15) half of walls and the ceiling was not significantly less effective than full IRS in terms of mosquito mortality. In the village trial, the annual entomological inoculation rate was higher for the unsprayed control (217 infective bites/person/year (ib/p/yr)) compared with the fully and partially sprayed sites, with 28 and 38 ib/p/yr, respectively. The transmission model predicts that the efficacy of partial IRS against all-age prevalence of malaria after six months would be broadly equivalent to a full IRS campaign in which 40% reduction is expected relative to no spray campaign. At scale, partial IRS in northern Ghana would have resulted in a 33% cost savings ($496,426) that would enable spraying of 36,000 additional rooms. These findings suggest that partial IRS is an effective, feasible, and cost saving approach to IRS that could be adopted to sustain and expand implementation of this key malaria control intervention.
Collapse
Affiliation(s)
- Sylvester Coleman
- PMI VectorLink Project, Abt Associates, Plot 11 Waterson Road, Fuo, Tamale, Ghana.
| | - Yemane Yihdego
- PMI VectorLink Project, Abt Associates, 6130 Executive Blvd, Rockville, MD, 20852, USA
| | - Ellie Sherrard-Smith
- Department of Infectious Disease Epidemiology, MRC Centre for Global Infectious Disease Analysis, Imperial College London, London, UK
| | - Churcher S Thomas
- Department of Infectious Disease Epidemiology, MRC Centre for Global Infectious Disease Analysis, Imperial College London, London, UK
| | - Dereje Dengela
- PMI VectorLink Project, Abt Associates, 6130 Executive Blvd, Rockville, MD, 20852, USA
| | - Richard M Oxborough
- PMI VectorLink Project, Abt Associates, 6130 Executive Blvd, Rockville, MD, 20852, USA
| | - Samuel K Dadzie
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
| | - Daniel Boakye
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
| | - Frank Gyamfi
- PMI VectorLink Project, Abt Associates, Plot 11 Waterson Road, Fuo, Tamale, Ghana
| | - Kwasi Obiri-Danso
- Department of Theoretical and Applied Biology, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Ben Johns
- PMI VectorLink Project, Abt Associates, 6130 Executive Blvd, Rockville, MD, 20852, USA
| | - Lilly V Siems
- PMI VectorLink Project, Abt Associates, 6130 Executive Blvd, Rockville, MD, 20852, USA
| | - Bradford Lucas
- PMI VectorLink Project, Abt Associates, 6130 Executive Blvd, Rockville, MD, 20852, USA
| | - Jon Eric Tongren
- US. President's Malaria Initiative, U.S. Agency for International Development, Accra, Ghana
| | - Sixte Zigirumugabe
- US. President's Malaria Initiative, U.S. Agency for International Development, Accra, Ghana
| | - Dominic Dery
- US. President's Malaria Initiative, U.S. Agency for International Development, Accra, Ghana
| | - Christen Fornadel
- U.S. President's Malaria Initiative, U.S. Agency for International Development, Washington, DC, USA
| | - Kristen George
- U.S. President's Malaria Initiative, U.S. Agency for International Development, Washington, DC, USA
| | - Allison Belemvire
- U.S. President's Malaria Initiative, U.S. Agency for International Development, Washington, DC, USA
| | - Jenny Carlson
- U.S. President's Malaria Initiative, U.S. Agency for International Development, Washington, DC, USA
| | - Seth R Irish
- U.S. President's Malaria Initiative, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Jennifer S Armistead
- U.S. President's Malaria Initiative, U.S. Agency for International Development, Washington, DC, USA
| | - Aklilu Seyoum
- PMI VectorLink Project, Abt Associates, 6130 Executive Blvd, Rockville, MD, 20852, USA
| |
Collapse
|