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Han E, Vijayarangamuthu K, Youn JS, Park YK, Jung SC, Jeon KJ. Degussa P25 TiO 2 modified with H 2 O 2 under microwave treatment to enhance photocatalytic properties. Catal Today 2018. [DOI: 10.1016/j.cattod.2017.08.057] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Youn JS, Csavina J, Rine KP, Shingler T, Taylor MP, Sáez AE, Betterton EA, Sorooshian A. Hygroscopic Properties and Respiratory System Deposition Behavior of Particulate Matter Emitted By Mining and Smelting Operations. Environ Sci Technol 2016; 50:11706-11713. [PMID: 27700056 PMCID: PMC5089925 DOI: 10.1021/acs.est.6b03621] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [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: 05/21/2023]
Abstract
This study examines size-resolved physicochemical data for particles sampled near mining and smelting operations and a background urban site in Arizona with a focus on how hygroscopic growth impacts particle deposition behavior. Particles with aerodynamic diameters between 0.056-18 μm were collected at three sites: (i) an active smelter operation in Hayden, AZ, (ii) a legacy mining site with extensive mine tailings in Iron King, AZ, and (iii) an urban site, inner-city Tucson, AZ. Mass size distributions of As and Pb exhibit bimodal profiles with a dominant peak between 0.32 and 0.56 μm and a smaller mode in the coarse range (>3 μm). The hygroscopicity profile did not exhibit the same peaks owing to dependence on other chemical constituents. Submicrometer particles were generally more hygroscopic than supermicrometer ones at all three sites with finite water-uptake ability at all sites and particle sizes examined. Model calculations at a relative humidity of 99.5% reveal significant respiratory system particle deposition enhancements at sizes with the largest concentrations of toxic contaminants. Between dry diameters of 0.32 and 0.56 μm, for instance, ICRP and MPPD models predict deposition fraction enhancements of 171%-261% and 33%-63%, respectively, at the three sites.
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Affiliation(s)
- Jong-sang Youn
- Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, AZ, USA
| | - Janae Csavina
- National Ecological Observatory Network (NEON), 1685 38 Street, Boulder, CO USA
| | - Kyle P. Rine
- Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ, USA
| | - Taylor Shingler
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA
| | - Mark Patrick Taylor
- Department of Environmental Sciences, Macquarie University, North Ryde, Sydney, NSW 2109, Australia
| | - A. Eduardo Sáez
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA
| | - Eric A. Betterton
- Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ, USA
| | - Armin Sorooshian
- Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, AZ, USA
- Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ, USA
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA
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