BROWSE

Related Researcher

Author's Photo

Lee, Changha
Advanced Redox Technology (ART) Lab
Research Interests
  • Water Treatment, Advanced Oxidation/Reduction, Water Chemistry, Environmental Catalyst

ITEM VIEW & DOWNLOAD

Oxidant production from corrosion of nano- and microparticulate zero-valent iron in the presence of oxygen: A comparative study

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Oxidant production from corrosion of nano- and microparticulate zero-valent iron in the presence of oxygen: A comparative study
Author
Lee, HongshinLee, Hye-jinKim, Hyung-EunKweon, JihyangLee, Byeong-DaeLee, Changha
Issue Date
2014-01
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF HAZARDOUS MATERIALS, v.265, pp.201 - 207
Abstract
In aqueous solution, zero-valent iron (ZVI, Fe0) is known to activate oxygen (O2) into reactive oxidants such as hydroxyl radical and ferryl ion capable of oxidizing contaminants. However, little is known about the effect of the particle size of ZVI on the yield of reactive oxidants. In this study, the production of reactive oxidants from nanoparticulate and microparticulate ZVIs (denoted as nZVI and mZVI, respectively) was comparatively investigated in the presence of O2 and EDTA. To quantify the oxidant yield, excess amount of methanol was employed, and the formation of its oxidation product, formaldehyde (HCHO), was monitored. The concentration of HCHO in the nZVI/O2 system rapidly reached the saturation value, whereas that in the mZVI/O2 system gradually increased throughout the entire reaction time. The mZVI/O2 system exhibited higher yields of HCHO than the nZVI/O2 system under both acidic and neutral pH conditions. The higher oxidant yields in the mZVI/O2 system are mainly attributed to the less reactivity of the mZVI surface with hydrogen peroxide (H2O2) relative to the surface of nZVI, which minimize the loss of H2O2 by ZVI (i.e., the two-electron reduction of H2O2 into water). In addition, the slow dissolution of Fe(II) from mZVI was found to be partially responsible for the higher oxidant yields at neutral pH.
URI
https://scholarworks.unist.ac.kr/handle/201301/4092
URL
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84890671960
DOI
10.1016/j.jhazmat.2013.11.066
ISSN
0304-3894
Appears in Collections:
UEE_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU