Kinetic Consideration of the Effect of Organic Impurities on Photocatalytic Phage Inactivation with TiO2

• Sato Takashi

  Division of Chemical Engineering, Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University

• Taya Masahito

  Division of Chemical Engineering, Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University

Bibliographic Information

Other Title

• 二酸化チタン光触媒によるファージ不活化に及ぼす有機物の影響に関する速度論的考察
• 2サンカ チタン ヒカリ ショクバイ ニ ヨル ファージ フカツカ ニ オヨボス ユウキブツ ノ エイキョウ ニ カンスル ソクドロンテキ コウサツ

Abstract

Photocatalytic inactivation tests were conducted on TiO₂ suspensions containing bacteriophage MS2 under the irradiation from a black-light fluorescent lamp in the presence of glucose or ethanol as a model impurity. In the absence of impurity, the semi-logarithmic plot of relative phage titer decreased linearly obeying a first-order reaction, while the addition of glucose or ethanol gave plots with curved profiles of decreasing phage titer. These results suggest that the presence of organic impurity changes the kinetics of the photocatalytic phage inactivation. The profiles of phage titer during the photoreaction could be kinetically analyzed by applying a series-event model. Estimating the kinetic parameters (lethal number, n, and apparent inactivation rate constant, k′) obtained from the applied model, it was found that an increase in the concentration of organic impurity resulted in an increase in n value and a decrease in k′ value. It was considered that the organic molecules are adsorbed on the surfaces of phage particles and function as scavengers of oxidative radicals (OX), and as protectors for the phage surfaces against oxidation by OX. This consideration was supported by the finding that an elevation of reaction temperature (T=283–313 K) in the presence of glucose resulted in reduction of n value as well as enhancement of k′ value.

Journal

• KAGAKU KOGAKU RONBUNSHU

  KAGAKU KOGAKU RONBUNSHU 32 (3), 288-292, 2006

  The Society of Chemical Engineers, Japan

Keywords

• Titanium Dioxide
• Photocatalytic Reaction
• Phage Inactivation
• Reactive Oxygen Species
• Organic Impurity
• Kinetic Model

Details

• CRID: 1390001204508376448
• NII Article ID: 10017582010
• NII Book ID: AN00037234
• DOI: 10.1252/kakoronbunshu.32.288
• ISSN: 13499203
• ISSN: 0386216X
• NDL BIB ID: 7971024
• Web Site: http://id.ndl.go.jp/bib/7971024
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7971024
• Web Site: http://www.jstage.jst.go.jp/article/kakoronbunshu/32/3/32_3_288/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed