Radical scavenging reaction kinetics with multiwalled carbon nanotubes

Details

• Personal Author:
  Akiba E ; Cassee FR ; Castranova, Vincent ; Endo M ; Kobayashi S ; Koyama K ; Matsumoto H ; Porter DW ; Saito N ; Tsuruoka S ; Usui Y ; Yanagisawa T
• Description:
  Progress in the development of carbon nanotubes (CNTs) has stimulated great interest among industries providing new applications. Meanwhile, toxicological evaluations on nanomaterials are advancing leading to a predictive exposure limit for CNTs, which implies the possibility of designing safer CNTs. To pursue safety by design, the redox potential in reactions with CNTs has been contemplated recently. However, the chemical reactivity of CNTs has not been explored kinetically, so that there is no scheme to express a redox reaction with CNTs, though it has been investigated and reported. In addition, the reactivity of CNTs is discussed with regard to impurities that consist of transition metals in CNTs, which obfuscates the contribution of CNTs to the reaction. The present work aimed at modeling CNT scavenging in aqueous solution using a kinetic approach and a simple first-order reaction scheme. The results show that CNTs follow the redox reaction assumption in a simple chemical system. As a result, the reaction with multiwalled CNTs is semiquantitatively denoted as redox potential, which suggests that their biological reactions may also be evaluated using a redox potential scheme. [Description provided by NIOSH]
• Subjects:
  Chemistry Occupational Health Safety Toxicology
• Keywords:
  Biological-effects Carbon-compounds Chemical-reactions Models Nanotechnology Reaction-rates Safety Engineering
• ISSN:
  0008-6223
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  HELD - Health Effects Laboratory Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  232-239
• Volume:
  83
• NIOSHTIC Number:
  nn:20045389
• Citation:
  Carbon 2015 Mar; 83:232-239
• Contact Point Address:
  Shuji Tsuruoka, Aquatic Innovation Center, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan
• Email:
  s_tsuruoka@shinshu-u.ac.jp
• Federal Fiscal Year:
  2015
• NORA Priority Area:
  Manufacturing
• Peer Reviewed:
  True
• Source Full Name:
  Carbon
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:e792f93831f0902353858785ea6c0c0ad57d33b64316607df335eb549847facfe1c8d062e309df1fb5a6af82a8c3f225a77d1bf9fbcdcf1366b7dd1b68934b2a
• Download URL:
  https://stacks.cdc.gov/view/cdc/200829/cdc_200829_DS1.pdf
• File Type:
  [PDF - 977.84 KB ]