Assessing Community Health Risks from Exposure to Ultrafine Particles Containing Transition Metals in the Greater Houston Area

Details

• Personal Author:
  Afshar M ; Han I ; Lee J ; Su W-C ; Zhang K
• Description:
  Ultrafine particles (UFPs) in urban air environments have been an essential public health concern. The inhalation of UFPs can introduce transition metals contained in the UFP into the human airways, leading to adverse health effects. Therefore, it is crucial to investigate urban air UFP exposure and health risks induced by transition metals. This research carried out a series of field measurements to study urban air UFP exposure in the Greater Houston Area. Three sampling sites in the Greater Houston Area representing varying levels of UFP exposures were selected. The newly developed Mobile Aerosol Lung Deposition Apparatus (MALDA) which consists of a complete set of human airway replicas and a pair of UFP particle sizers was deployed in the sampling sites during three sampling timeframes (morning rush hours, noon, and afternoon rush hours) to obtain on-site UFP respiratory deposition data. UFP samples were collected at the sampling sites for metal composition analysis. The acquired UFP respiratory deposition data and UFP composition data were then used to calculate the respiratory deposited mass of transition metals and estimate the associated health risks for individuals living near sampling sites. Our results showed that transition metal-induced non-cancer risks caused by exposure to urban UFPs were within acceptable limits. The estimated lifetime excess cancer risks were generally <10?6, indicating an overall acceptable level of transition metal-induced cancer risk. [Description provided by NIOSH]
• Subjects:
  Aerosols Community Health Services Occupational Health Particulate Matter Respiratory System Safety Vehicle Emissions
• Keywords:
  Author Keywords: Ultrafine Particle Community Health Diesel Exhausts Health Risk Inhalation Particulates Respiratory Deposition Transition Metal Transition Metals Ultrafine Particles Urban Area

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• ISSN:
  0048-9697
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  New York ; OSHA Region 2 ; OSHA Region 3 ; OSHA Region 6 ; Pennsylvania ; Texas
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  912
• NIOSHTIC Number:
  nn:20068978
• Citation:
  Sci Total Environ 2024 Feb; 912:169067
• Contact Point Address:
  Wei-Chung Su, University of Texas Health Science Center at Houston, 1200 Pressler St., Houston, TX 77030, USA
• Email:
  Wei-Chung.Su@uth.tmc.edu
• Federal Fiscal Year:
  2024
• Performing Organization:
  University of Texas Health Science Center, Houston
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Science of the Total Environment
• End Date:
  20250630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:5c49bc37910fa5cc45058d420767e50d58361571d9920f493ce357cfa22f7d528097fafd0a09e8449221de53a0a1aa59e71e83f5de4cd04fed8d78da8f54b333
• Download URL:
  https://stacks.cdc.gov/view/cdc/207535/cdc_207535_DS1.pdf
• File Type:
  [PDF - 6.18 MB ]