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Ranpara A, Stefaniak AB, Fernandez E, Bowers LN, Arnold ED, LeBouf RF. Influence of puff topographies on e-liquid heating temperature, emission characteristics and modeled lung deposition of Puff Bar ™. Aerosol Sci Technol 2023; 57:450-466. [PMID: 37969359 PMCID: PMC10641718 DOI: 10.1080/02786826.2023.2190786] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 02/27/2023] [Indexed: 11/17/2023]
Abstract
Puff Bar™, one of the latest designs of e-cigarettes, heats a mixture of liquid using a battery-powered coil at certain temperatures to emit aerosol. This study presents a mass-based characterization of emissions from seven flavors of Puff Bar™ devices by aerosolizing with three puff topographies [(puff volume: 55 < 65 < 75-mL) within 4-seconds at 30-seconds interval]. We evaluated the effects of puff topographies on heating temperatures; characterized particles using a cascade impactor; and measured volatile carbonyl compounds (VCCs). Modeled dosimetry and calculated mass median aerodynamic diameters (MMADs) were used to estimate regional, total respiratory deposition of the inhaled aerosol and exhaled fractions that could pose secondhand exposure risk. Temperatures of Puff Bar™ e-liquids increased with increasing puff volumes: 55mL (116.6 °C), 65 mL (128.3 °C), and 75mL (168.9 °C). Flavor types significantly influenced MMADs, total mass of particles, and VCCs (μg/puff: 2.15-2.30) in Puff Bar™ emissions (p < 0.05). Increasing puff volume (mL:55 < 65 < 75) significantly increased total mass (mg/puff: 4.6 < 5.6 < 6.2) of particles without substantially changing MMADs (~1μm:1.02~0.99~0.98). Aerosol emissions were estimated to deposit in the pulmonary region of e-cigarette user (41-44%), which could have toxicological importance. More than 2/3 (67-77%) of inhaled particles were estimated to be exhaled by users, which could affect bystanders. The VCCs measured contained carcinogens-formaldehyde (29.6%) and acetaldehyde (16.4%)-as well as respiratory irritants: acetone (23.9%), isovaleraldehyde (14.5%), and acrolein (4.9%). As Puff Bar™ emissions contain respirable particles and harmful chemicals, efforts should be made to minimize exposures, especially in indoor settings where people (including vulnerable populations) spend most of their life-time.
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Affiliation(s)
- Anand Ranpara
- Department of Physiology and Pharmacology, School of Medicine, West Virginia University, Health Science Center, Morgantown, West Virginia, USA
| | - Aleksandr B. Stefaniak
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia, USA
| | - Elizabeth Fernandez
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia, USA
| | - Lauren N. Bowers
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia, USA
| | - Elizabeth D. Arnold
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia, USA
| | - Ryan F. LeBouf
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia, USA
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Bowers LN, Stefaniak AB, Knepp AK, LeBouf RF, Martin SB, Ranpara AC, Burns DA, Virji MA. Potential for Exposure to Particles and Gases throughout Vat Photopolymerization Additive Manufacturing Processes. Buildings (Basel) 2022; 12:10.3390/buildings12081222. [PMID: 37961074 PMCID: PMC10641710 DOI: 10.3390/buildings12081222] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Vat photopolymerization (VP), a type of additive manufacturing process that cures resin to build objects, can emit potentially hazardous particles and gases. We evaluated two VP technologies, stereolithography (SLA) and digital light processing (DLP), in three separate environmental chambers to understand task-based impacts on indoor air quality. Airborne particles, total volatile organic compounds (TVOCs), and/or specific volatile organic compounds (VOCs) were monitored during each task to evaluate their exposure potential. Regardless of duration, all tasks released particles and organic gases, though concentrations varied between SLA and DLP processes and among tasks. Maximum particle concentrations reached 1200 #/cm3 and some aerosols contained potentially hazardous elements such as barium, chromium, and manganese. TVOC concentrations were highest for the isopropyl alcohol (IPA) rinsing, soaking, and drying post-processing tasks (up to 36.8 mg/m3), lowest for the resin pouring pre-printing, printing, and resin recovery post-printing tasks (up to 0.1 mg/m3), and intermediate for the curing post-processing task (up to 3 mg/m3). Individual VOCs included, among others, the potential occupational carcinogen acetaldehyde and the immune sensitizer 2-hydroxypropyl methacrylate (pouring, printing, recovery, and curing tasks). Careful consideration of all tasks is important for the development of strategies to minimize indoor air pollution and exposure potential from VP processes.
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Affiliation(s)
- Lauren N. Bowers
- National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
| | | | - Alycia K. Knepp
- National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
| | - Ryan F. LeBouf
- National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
| | - Stephen B. Martin
- National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
| | - Anand C. Ranpara
- National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
| | - Dru A. Burns
- National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
| | - M. Abbas Virji
- National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
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Bowers LN, Ranpara AC, Roach KA, Knepp AK, Arnold ED, Stefaniak AB, Virji MA. Comparison of product safety data sheet ingredient lists with skin irritants and sensitizers present in a convenience sample of light-curing resins used in additive manufacturing. Regul Toxicol Pharmacol 2022; 133:105198. [PMID: 35659913 PMCID: PMC9351547 DOI: 10.1016/j.yrtph.2022.105198] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 05/24/2022] [Accepted: 05/25/2022] [Indexed: 11/25/2022]
Abstract
Material jetting and vat photopolymerization additive manufacturing (AM) processes use liquid resins to build objects. These resins can contain skin irritants and/or sensitizers but product safety data sheets (SDSs) might not declare all ingredients. We characterized elemental and organic skin irritants and sensitizers present in 39 commercial products; evaluated the influence of resin manufacturer, system, color, and AM process type on the presence of irritants and sensitizers; and compared product SDSs to results. Among all products, analyses identified 23 irritant elements, 54 irritant organic substances, 22 sensitizing elements, and 23 sensitizing organic substances; SDSs listed 3, 9, 4, and 6 of these ingredients, respectively. Per product, the number and total mass (an indicator of potential dermal loading) of ingredients varied: five to 17 irritant elements (8.32-4756.65 mg/kg), one to 17 irritant organics (3273 to 356,000 mg/kg), four to 17 sensitizing elements (8.27-4755.63 mg/kg), and one to seven sensitizing organics (15-382,170 mg/kg). Median numbers and concentrations of irritants and sensitizers were significantly influenced by resin system and AM process type. The presence of undeclared irritants and sensitizers in these resins supports the need for more complete information on product SDSs for comprehensive dermal risk assessments.
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Affiliation(s)
- Lauren N Bowers
- National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV, 26505, USA
| | - Anand C Ranpara
- National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV, 26505, USA
| | - Katherine A Roach
- National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV, 26505, USA
| | - Alycia K Knepp
- National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV, 26505, USA
| | - Elizabeth D Arnold
- National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV, 26505, USA
| | - Aleksandr B Stefaniak
- National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV, 26505, USA.
| | - M Abbas Virji
- National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV, 26505, USA
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Stefaniak AB, Bowers LN, Cottrell G, Erdem E, Knepp AK, Martin SB, Pretty J, Duling MG, Arnold ED, Wilson Z, Krider B, Fortner AR, LeBouf RF, Virji MA, Sirinterlikci A. Towards sustainable additive manufacturing: The need for awareness of particle and vapor releases during polymer recycling, making filament, and fused filament fabrication 3-D printing. Resour Conserv Recycl 2022; 176:10.1016/j.resconrec.2021.105911. [PMID: 35982992 PMCID: PMC9380603 DOI: 10.1016/j.resconrec.2021.105911] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Fused filament fabrication three-dimensional (FFF 3-D) printing is thought to be environmentally sustainable; however, significant amounts of waste can be generated from this technology. One way to improve its sustainability is via distributed recycling of plastics in homes, schools, and libraries to create feedstock filament for printing. Risks from exposures incurred during recycling and reuse of plastics has not been incorporated into life cycle assessments. This study characterized contaminant releases from virgin (unextruded) and recycled plastics from filament production through FFF 3-D printing. Waste polylactic acid (PLA) and acrylonitrile butadiene styrene (ABS) plastics were recycled to create filament; virgin PLA, ABS, high and low density polyethylenes, high impact polystyrene, and polypropylene pellets were also extruded into filament. The release of particles and chemicals into school classrooms was evaluated using standard industrial hygiene methodologies. All tasks released particles that contained hazardous metals (e.g., manganese) and with size capable of depositing in the gas exchange region of the lung, i.e., granulation of waste PLA and ABS (667 to 714 nm) and filament making (608 to 711 nm) and FFF 3-D printing (616 to 731 nm) with waste and virgin plastics. All tasks released vapors, including respiratory irritants and potential carcinogens (benzene and formaldehyde), mucus membrane irritants (acetone, xylenes, ethylbenzene, and methyl methacrylate), and asthmagens (styrene, multiple carbonyl compounds). These data are useful for incorporating risks of exposure to hazardous contaminants in future life cycle evaluations to demonstrate the sustainability and circular economy potential of FFF 3-D printing in distributed spaces.
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Affiliation(s)
- Aleksandr B. Stefaniak
- National Institute for Occupational Safety and Health, Respiratory Health Division, Morgantown, WV, 26505, United States
- Corresponding author at: National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV, 26505, United States. (A.B. Stefaniak)
| | - Lauren N. Bowers
- National Institute for Occupational Safety and Health, Respiratory Health Division, Morgantown, WV, 26505, United States
| | - Gabe Cottrell
- Robert Morris University, School of Engineering, Mathematics, and Science, Moon Township, PA, 15108, United States
| | - Ergin Erdem
- Robert Morris University, School of Engineering, Mathematics, and Science, Moon Township, PA, 15108, United States
| | - Alycia K. Knepp
- National Institute for Occupational Safety and Health, Respiratory Health Division, Morgantown, WV, 26505, United States
| | - Stephen B. Martin
- National Institute for Occupational Safety and Health, Respiratory Health Division, Morgantown, WV, 26505, United States
| | - Jack Pretty
- National Institute for Occupational Safety and Health, Health Effects Laboratory Division, Cincinnati, OH, 45213, United States
| | - Matthew G. Duling
- National Institute for Occupational Safety and Health, Respiratory Health Division, Morgantown, WV, 26505, United States
| | - Elizabeth D. Arnold
- National Institute for Occupational Safety and Health, Respiratory Health Division, Morgantown, WV, 26505, United States
| | - Zachary Wilson
- Robert Morris University, School of Engineering, Mathematics, and Science, Moon Township, PA, 15108, United States
| | - Benjamin Krider
- Robert Morris University, School of Engineering, Mathematics, and Science, Moon Township, PA, 15108, United States
| | - Alyson R. Fortner
- National Institute for Occupational Safety and Health, Respiratory Health Division, Morgantown, WV, 26505, United States
| | - Ryan F. LeBouf
- National Institute for Occupational Safety and Health, Respiratory Health Division, Morgantown, WV, 26505, United States
| | - M. Abbas Virji
- National Institute for Occupational Safety and Health, Respiratory Health Division, Morgantown, WV, 26505, United States
| | - Arif Sirinterlikci
- Robert Morris University, School of Engineering, Mathematics, and Science, Moon Township, PA, 15108, United States
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5
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Stefaniak AB, Bowers LN, Cottrell G, Erdem E, Knepp AK, Martin S, Pretty J, Duling MG, Arnold ED, Wilson Z, Krider B, LeBouf RF, Virji MA, Sirinterlikci A. Use of 3-Dimensional Printers in Educational Settings: The Need for Awareness of the Effects of Printer Temperature and Filament Type on Contaminant Releases. ACS Chem Health Saf 2021; 28:444-456. [DOI: 10.1021/acs.chas.1c00041] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Aleksandr B. Stefaniak
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Lauren N. Bowers
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Gabe Cottrell
- School of Engineering, Mathematics, and Science, Robert Morris University, Moon Township, Pennsylvania 15108, United States
| | - Ergin Erdem
- School of Engineering, Mathematics, and Science, Robert Morris University, Moon Township, Pennsylvania 15108, United States
| | - Alycia K. Knepp
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Stephen Martin
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Jack Pretty
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Cincinnati, Ohio 45213, United States
| | - Matthew G. Duling
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Elizabeth D. Arnold
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Zachary Wilson
- School of Engineering, Mathematics, and Science, Robert Morris University, Moon Township, Pennsylvania 15108, United States
| | - Benjamin Krider
- School of Engineering, Mathematics, and Science, Robert Morris University, Moon Township, Pennsylvania 15108, United States
| | - Ryan F. LeBouf
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - M. Abbas Virji
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Arif Sirinterlikci
- School of Engineering, Mathematics, and Science, Robert Morris University, Moon Township, Pennsylvania 15108, United States
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6
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Stefaniak AB, Bowers LN, Martin SB, Hammond DR, Ham JE, Wells JR, Fortner AR, Knepp AK, Preez SD, Pretty JR, Roberts JL, du Plessis JL, Schmidt A, Duling MG, Bader A, Virji MA. Large-Format Additive Manufacturing and Machining Using High-Melt-Temperature Polymers. Part I: Real-Time Particulate and Gas-Phase Emissions. ACS Chem Health Saf 2021; 28:190-200. [DOI: 10.1021/acs.chas.0c00128] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Aleksandr B. Stefaniak
- National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Lauren N. Bowers
- National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Stephen B. Martin
- National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Duane R. Hammond
- National Institute for Occupational Safety and Health, Cincinnati, Ohio 45213, United States
| | - Jason E. Ham
- National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - J. R. Wells
- National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Alyson R. Fortner
- National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Alycia K. Knepp
- National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Sonette du Preez
- North-West University, Occupational Hygiene and Health Research Initiative, Private Bag X6001, Potchefstroom 2520, South Africa
| | - Jack R. Pretty
- National Institute for Occupational Safety and Health, Cincinnati, Ohio 45213, United States
| | - Jennifer L. Roberts
- National Institute for Occupational Safety and Health, Cincinnati, Ohio 45213, United States
| | - Johan L. du Plessis
- North-West University, Occupational Hygiene and Health Research Initiative, Private Bag X6001, Potchefstroom 2520, South Africa
| | - Austin Schmidt
- Additive Engineering Solutions, Akron, Ohio 44305, United States
| | - Matthew G. Duling
- National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Andrew Bader
- Additive Engineering Solutions, Akron, Ohio 44305, United States
| | - M. Abbas Virji
- National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
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Stefaniak AB, Bowers LN, Martin SB, Hammond DR, Ham JE, Wells JR, Fortner AR, Knepp AK, du Preez S, Pretty JR, Roberts JL, du Plessis JL, Schmidt A, Duling MG, Bader A, Virji MA. Large-Format Additive Manufacturing and Machining Using High-Melt-Temperature Polymers. Part II: Characterization of Particles and Gases. ACS Chem Health Saf 2021; 28:268-278. [DOI: 10.1021/acs.chas.0c00129] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aleksandr B. Stefaniak
- National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Lauren N. Bowers
- National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Stephen B. Martin
- National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Duane R. Hammond
- National Institute for Occupational Safety and Health, Cincinnati, Ohio 45213, United States
| | - Jason E. Ham
- National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - J. R. Wells
- National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Alyson R. Fortner
- National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Alycia K. Knepp
- National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Sonette du Preez
- North-West University, Occupational Hygiene and Health Research Initiative, Private Bag X6001, Potchefstroom 2520, South Africa
| | - Jack R. Pretty
- National Institute for Occupational Safety and Health, Cincinnati, Ohio 45213, United States
| | - Jennifer L. Roberts
- National Institute for Occupational Safety and Health, Cincinnati, Ohio 45213, United States
| | - Johan L. du Plessis
- North-West University, Occupational Hygiene and Health Research Initiative, Private Bag X6001, Potchefstroom 2520, South Africa
| | - Austin Schmidt
- Additive Engineering Solutions, Akron, Ohio 44305, United States
| | - Matthew G. Duling
- National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
| | - Andrew Bader
- Additive Engineering Solutions, Akron, Ohio 44305, United States
| | - M. Abbas Virji
- National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, United States
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Olgun NS, Morris AM, Stefaniak AB, Bowers LN, Knepp AK, Duling MG, Mercer RR, Kashon ML, Fedan JS, Leonard SS. Biological effects of inhaled hydraulic fracturing sand dust. III. Cytotoxicity and pro-inflammatory responses in cultured murine macrophage cells. Toxicol Appl Pharmacol 2020; 408:115281. [PMID: 33065155 PMCID: PMC7952011 DOI: 10.1016/j.taap.2020.115281] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 10/07/2020] [Accepted: 10/10/2020] [Indexed: 12/16/2022]
Abstract
Cultured murine macrophages (RAW 264.7) were used to investigate the effects of fracking sand dust (FSD) for its pro-inflammatory activity, in order to gain insight into the potential toxicity to workers associated with inhalation of FSD during hydraulic fracturing. While the role of respirable crystalline silica in the development of silicosis is well documented, nothing is known about the toxicity of inhaled FSD. The FSD (FSD 8) used in these studies was from an unconventional gas well drilling site. FSD 8was prepared as a 10 mg/ml stock solution in sterile PBS, vortexed for 15 s, and allowed to sit at room temperature for 30 min before applying the suspension to RAW 264.7cells. Compared to PBS controls, cellular viability was significantly decreased after a 24 h exposure to FSD. Intracellular reactive oxygen species (ROS) production and the production of IL-6, TNFα, and endothelin-1 (ET-1) were up-regulated as a result of the exposure, whereas the hydroxyl radical (.OH) was only detected in an acellular system. Immunofluorescent staining of cells against TNFα revealed that FSD 8 caused cellular blebbing, and engulfment of FSD 8 by macrophages was observed with enhanced dark-field microscopy. The observed changes in cellular viability, cellular morphology, free radical generation and cytokine production all confirm that FSD 8 is cytotoxic to RAW 264.7 cells and warrants future studies into the specific pathways and mechanisms by which these toxicities occur.
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Affiliation(s)
- Nicole S Olgun
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America.
| | - Anna M Morris
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Aleksandr B Stefaniak
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Lauren N Bowers
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Alycia K Knepp
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Matthew G Duling
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Robert R Mercer
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Michael L Kashon
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Jeffrey S Fedan
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
| | - Stephen S Leonard
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States of America
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9
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Olgun NS, Morris AM, Bowers LN, Stefaniak AB, Friend SA, Reznik SE, Leonard SS. Mild steel and stainless steel welding fumes elicit pro-inflammatory and pro-oxidant effects in first trimester trophoblast cells. Am J Reprod Immunol 2020; 83:e13221. [PMID: 31943498 PMCID: PMC7079021 DOI: 10.1111/aji.13221] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 11/18/2019] [Accepted: 12/07/2019] [Indexed: 12/17/2022] Open
Abstract
Problem As more women join the skilled‐trade workforce, the effects of workplace exposures on pregnancy need to be explored. This study aims to identify the effects of mild steel and stainless steel welding fume exposures on cultured placental trophoblast cells. Method of study Welding fumes (mild steel and stainless steel) were generously donated by Lincoln Electric. Electron microscopy was used to characterize welding fume particle size and the ability of particles to enter extravillous trophoblast cells (HTR‐8/SVneo). Cellular viability, free radical production, cytokine production, and ability of cells to maintain invasive properties were analyzed, respectively, by WST‐1, electron paramagnetic resonance, DCFH‐DA, V‐plex MULTI‐SPOT assay system, and a matrix gel invasion assay. Results For all three welding fume types, average particle size was <210 nm. HTR‐8/SVneo cells internalized welding particles, and nuclear condensation was observed. Cellular viability was significantly decreased at the high dose of 100 µg/mL for all three welding fumes, and stainless steel generated the greatest production of the hydroxyl radical, and intracellular reactive oxygen species. Production of the cytokines IL‐1β and TNFα were not observed in response to welding fume exposure, but IL‐6 and IL‐8 were. Finally, the invasive capability of cells was decreased upon exposure to both mild steel and stainless steel welding fumes. Conclusion Welding fumes are cytotoxic to extravillous trophoblasts, as is evident by the production of free radicals, pro‐inflammatory cytokines, and the observed decrease in invasive capabilities.
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Affiliation(s)
- Nicole S Olgun
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia
| | - Anna M Morris
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia
| | - Lauren N Bowers
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia
| | - Aleksandr B Stefaniak
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia
| | - Sherri A Friend
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia
| | - Sandra E Reznik
- Department of Pharmaceutical Sciences, St. John's University, Queens, New York
| | - Stephen S Leonard
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia
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10
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Yi J, Duling MG, Bowers LN, Knepp AK, LeBouf RF, Nurkiewicz TR, Ranpara A, Luxton T, Martin SB, Burns DA, Peloquin DM, Baumann EJ, Virji MA, Stefaniak AB. Particle and organic vapor emissions from children's 3-D pen and 3-D printer toys. Inhal Toxicol 2019; 31:432-445. [PMID: 31874579 PMCID: PMC6995422 DOI: 10.1080/08958378.2019.1705441] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 12/11/2019] [Indexed: 01/09/2023]
Abstract
Objective: Fused filament fabrication "3-dimensional (3-D)" printing has expanded beyond the workplace to 3-D printers and pens for use by children as toys to create objects.Materials and methods: Emissions from two brands of toy 3-D pens and one brand of toy 3-D printer were characterized in a 0.6 m3 chamber (particle number, size, elemental composition; concentrations of individual and total volatile organic compounds (TVOC)). The effects of print parameters on these emission metrics were evaluated using mixed-effects models. Emissions data were used to model particle lung deposition and TVOC exposure potential.Results: Geometric mean particle yields (106-1010 particles/g printed) and sizes (30-300 nm) and TVOC yields (
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Affiliation(s)
- Jinghai Yi
- Department of Physiology and Pharmacology, and the Center for Inhalation Toxicology, West Virginia University School of Medicine, Morgantown, WV, 26506
| | - Matthew G. Duling
- National Institute for Occupational Safety and Health, Morgantown, WV, 26505
| | - Lauren N. Bowers
- National Institute for Occupational Safety and Health, Morgantown, WV, 26505
| | - Alycia K. Knepp
- National Institute for Occupational Safety and Health, Morgantown, WV, 26505
| | - Ryan F. LeBouf
- National Institute for Occupational Safety and Health, Morgantown, WV, 26505
| | - Timothy R. Nurkiewicz
- Department of Physiology and Pharmacology, and the Center for Inhalation Toxicology, West Virginia University School of Medicine, Morgantown, WV, 26506
- National Institute for Occupational Safety and Health, Morgantown, WV, 26505
| | - Anand Ranpara
- National Institute for Occupational Safety and Health, Morgantown, WV, 26505
| | - Todd Luxton
- U.S. Environmental Protection Agency, Office of Research and Development, National Risk Management Research Laboratory, Cincinnati, OH, 45224
| | - Stephen B. Martin
- National Institute for Occupational Safety and Health, Morgantown, WV, 26505
| | - Dru A. Burns
- National Institute for Occupational Safety and Health, Morgantown, WV, 26505
| | | | | | - M. Abbas Virji
- National Institute for Occupational Safety and Health, Morgantown, WV, 26505
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11
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Mandler WK, Qi C, Orandle MS, Sarkisian K, Mercer RR, Stefaniak AB, Knepp AK, Bowers LN, Battelli LA, Shaffer J, Friend SA, Qian Y, Sisler JD. Mouse pulmonary response to dust from sawing Corian®, a solid-surface composite material. J Toxicol Environ Health A 2019; 82:645-663. [PMID: 31290376 DOI: 10.1080/15287394.2019.1640816] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 06/09/2023]
Abstract
Corian®, a solid-surface composite (SSC), is composed of alumina trihydrate and acrylic polymer. The aim of the present study was to examine the pulmonary toxicity attributed to exposure to SSC sawing dust. Male mice were exposed to either phosphate buffer saline (PBS, control), 62.5, 125, 250, 500, or 1000 µg of SSC dust, or 1000 µg silica (positive control) via oropharyngeal aspiration. Body weights were measured for the duration of the study. Bronchoalveolar lavage fluid (BALF) and tissues were collected for analysis at 1 and 14 days post-exposure. Enhanced-darkfield and histopathologic analysis was performed to assess particle distribution and inflammatory responses. BALF cells and inflammatory cytokines were measured. The geometric mean diameter of SSC sawing dust following suspension in PBS was 1.25 µm. BALF analysis indicated that lactate dehydrogenase (LDH) activity, inflammatory cells, and pro-inflammatory cytokines were significantly elevated in the 500 and 1000 µg SSC exposure groups at days 1 and 14, suggesting that exposure to these concentrations of SSC induced inflammatory responses, in some cases to a greater degree than the silica positive control. Histopathology indicated the presence of acute alveolitis at all doses at day 1, which was largely resolved by day 14. Alveolar particle deposition and granulomatous mass formation were observed in all exposure groups at day 14. The SSC particles were poorly cleared, with 81% remaining at the end of the observation period. These findings demonstrate that SSC sawing dust exposure induces pulmonary inflammation and damage that warrants further investigation. Abbreviations: ANOVA: Analysis of Variance; ATH: Alumina Trihydrate; BALF: Bronchoalveolar Lavage Fluid; Dpg: Geometric Mean Diameter; FE-SEM: Field Emission Scanning Electron Microscopy; IACUC: Institutional Animal Care and Use Committee; IFN-γ: Interferon Gamma; IL-1 Β: Interleukin-1 Beta; IL-10: Interleukin-10; IL-12: Interleukin-12; IL-2: Interleukin-2; IL-4: Interleukin-4; IL-5: Interleukin-5; IL-6: Interleukin-6; KC/GRO: Neutrophil-Activating Protein 3; MMAD: Mass Median Aerodynamic Diameter; PBS: Phosphate-Buffered Saline; PEL: Permissible Exposure Limit; PM: Polymorphonuclear Leukocytes; PNOR: Particles Not Otherwise Regulated; SEM/EDX: Scanning Electron Microscope/Energy-Dispersive X-Ray; SSA: Specific Surface Area; SSC: Solid Surface Composite; TNFα: Tumor Necrosis Factor-Alpha; VOC: Volatile Organic Compounds; σg: Geometric Standard Deviation.
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Affiliation(s)
- W Kyle Mandler
- a Health Effects Laboratory Division, National Institute for Occupational Safety and Health , Morgantown , WV , USA
| | - Chaolong Qi
- b Division of Applied Research, National Institute for Occupational Safety and Health , Cincinnati , OH , USA
| | - Marlene S Orandle
- a Health Effects Laboratory Division, National Institute for Occupational Safety and Health , Morgantown , WV , USA
| | - Khachatur Sarkisian
- a Health Effects Laboratory Division, National Institute for Occupational Safety and Health , Morgantown , WV , USA
| | - Robert R Mercer
- a Health Effects Laboratory Division, National Institute for Occupational Safety and Health , Morgantown , WV , USA
| | - Aleksandr B Stefaniak
- c Respiratory Health Division, National Institute for Occupational Safety and Health , Morgantown , WV , USA
| | - Alycia K Knepp
- c Respiratory Health Division, National Institute for Occupational Safety and Health , Morgantown , WV , USA
| | - Lauren N Bowers
- c Respiratory Health Division, National Institute for Occupational Safety and Health , Morgantown , WV , USA
| | - Lori A Battelli
- a Health Effects Laboratory Division, National Institute for Occupational Safety and Health , Morgantown , WV , USA
| | - Justine Shaffer
- a Health Effects Laboratory Division, National Institute for Occupational Safety and Health , Morgantown , WV , USA
| | - Sherri A Friend
- a Health Effects Laboratory Division, National Institute for Occupational Safety and Health , Morgantown , WV , USA
| | - Yong Qian
- a Health Effects Laboratory Division, National Institute for Occupational Safety and Health , Morgantown , WV , USA
| | - Jennifer D Sisler
- a Health Effects Laboratory Division, National Institute for Occupational Safety and Health , Morgantown , WV , USA
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12
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Stefaniak AB, Johnson AR, du Preez S, Hammond DR, Wells JR, Ham JE, LeBouf RF, Menchaca KW, Martin SB, Duling MG, Bowers LN, Knepp AK, Su FC, de Beer DJ, du Plessis JL. Evaluation of emissions and exposures at workplaces using desktop 3-dimensional printer. J Chem Health Saf 2019; 26:19-30. [PMID: 31798757 PMCID: PMC6889885 DOI: 10.1016/j.jchas.2018.11.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
There is a paucity of data on additive manufacturing process emissions and personal exposures in real-world workplaces. Hence, we evaluated atmospheres in four workplaces utilizing desktop "3-dimensional" (3-d) printers [fused filament fabrication (FFF) and sheer] for production, prototyping, or research. Airborne particle diameter and number concentration and total volatile organic compound concentrations were measured using real-time instruments. Airborne particles and volatile organic compounds were collected using time-integrated sampling techniques for off-line analysis. Personal exposures for metals and volatile organic compounds were measured in the breathing zone of operators. All 3-d printers that were monitored released ultrafine and fine particles and organic vapors into workplace air. Particle number-based emission rates (#/min) ranged from 9.4 × 109 to 4.4 × 1011 (n = 9samples) for FFF3-d printers and from 1.9 to 3.8 × 109 (n = 2 samples) for a sheer 3-d printer. The large variability in emission rate values reflected variability from the printers as well as differences in printer design, operating conditions, and feedstock materials among printers. A custom-built ventilated enclosure evaluated at one facility was capable of reducing particle number and total organic chemical concentrations by 99.7% and 53.2%, respectively. Carbonyl compounds were detected in room air; however, none were specifically attributed to the 3-d printing process. Personal exposure to metals (aluminum, iron) and 12 different organic chemicals were all below applicable NIOSH Recommended Exposure Limit values, but results are not reflective of all possible exposure scenarios. More research is needed to understand 3-d printer emissions, exposures, and efficacy of engineering controls in occupational settings.
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Affiliation(s)
- A B Stefaniak
- National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - A R Johnson
- National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - S du Preez
- North-West University, Occupational Hygiene and Health Research Initiative, Private Bag X6001, Potchefst-room, 2520, South Africa
| | - D R Hammond
- National Institute for Occupational Safety and Health, Cincinnati, OH, USA
| | - J R Wells
- National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - J E Ham
- National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - R F LeBouf
- National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - K W Menchaca
- National Institute for Occupational Safety and Health, Cincinnati, OH, USA
| | - S B Martin
- National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - M G Duling
- National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - L N Bowers
- National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - A K Knepp
- National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - F C Su
- National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - D J de Beer
- North-West University, Technology Transfer and Innovation Support Office, Private BagX6001, Potchefstroom, 2520, South Africa
| | - J L du Plessis
- NorthWest University, Occupational Hygiene and Health Research Initiative, Private Bag X6001, Potchefstroom, 2520, South Africa
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13
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Stefaniak AB, Bowers LN, Knepp AK, Virji MA, Birch EM, Ham JE, Wells JR, Chaolong Q, Schwegler-Berry D, Friend S, Johnson AR, Martin SB, Qian Y, LeBouf RF, Birch Q, Hammond D. Three-dimensional printing with nano-enabled filaments releases polymer particles containing carbon nanotubes into air. Indoor Air 2018; 28:840-851. [PMID: 30101413 PMCID: PMC6398333 DOI: 10.1111/ina.12499] [Citation(s) in RCA: 30] [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] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 08/03/2018] [Accepted: 08/06/2018] [Indexed: 05/14/2023]
Abstract
Fused deposition modeling (FDM™) 3-dimensional printing uses polymer filament to build objects. Some polymer filaments are formulated with additives, though it is unknown if they are released during printing. Three commercially available filaments that contained carbon nanotubes (CNTs) were printed with a desktop FDM™ 3-D printer in a chamber while monitoring total particle number concentration and size distribution. Airborne particles were collected on filters and analyzed using electron microscopy. Carbonyl compounds were identified by mass spectrometry. The elemental carbon content of the bulk CNT-containing filaments was 1.5 to 5.2 wt%. CNT-containing filaments released up to 1010 ultrafine (d < 100 nm) particles/g printed and 106 to 108 respirable (d ~0.5 to 2 μm) particles/g printed. From microscopy, 1% of the emitted respirable polymer particles contained visible CNTs. Carbonyl emissions were observed above the limit of detection (LOD) but were below the limit of quantitation (LOQ). Modeling indicated that, for all filaments, the average proportional lung deposition of CNT-containing polymer particles was 6.5%, 5.7%, and 7.2% for the head airways, tracheobronchiolar, and pulmonary regions, respectively. If CNT-containing polymer particles are hazardous, it would be prudent to control emissions during use of these filaments.
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Affiliation(s)
| | - Lauren N. Bowers
- National Institute for Occupational Safety and Health, Morgantown, West Virginia
| | - Alycia K. Knepp
- National Institute for Occupational Safety and Health, Morgantown, West Virginia
| | - M. Abbas Virji
- National Institute for Occupational Safety and Health, Morgantown, West Virginia
| | - Eileen M. Birch
- National Institute for Occupational Safety and Health, Cincinnati, Ohio
| | - Jason E. Ham
- National Institute for Occupational Safety and Health, Morgantown, West Virginia
| | - J. R. Wells
- National Institute for Occupational Safety and Health, Morgantown, West Virginia
| | - Qi Chaolong
- National Institute for Occupational Safety and Health, Cincinnati, Ohio
| | | | - Sherri Friend
- National Institute for Occupational Safety and Health, Morgantown, West Virginia
| | - Alyson R. Johnson
- National Institute for Occupational Safety and Health, Morgantown, West Virginia
| | - Stephen B. Martin
- National Institute for Occupational Safety and Health, Morgantown, West Virginia
| | - Yong Qian
- National Institute for Occupational Safety and Health, Morgantown, West Virginia
| | - Ryan F. LeBouf
- National Institute for Occupational Safety and Health, Morgantown, West Virginia
| | - Quinn Birch
- Department of Chemical and Environmental Engineering, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, Ohio
| | - Duane Hammond
- National Institute for Occupational Safety and Health, Cincinnati, Ohio
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