Photocatalytic degradation of E. coliform in water

Photocatalytic degradation of E. coliform in water This study aims to further investigate the total mineralization of the bacteria to the extent of death and cell-mass inactivation using a TiO 2 –Fe 2 O 3 membrane photocatalytic oxidation reactor. Experimental results clearly indicated that dissolved oxygen (DO), hydraulic retention time (HRT) and concentration of the model bacteria ( Escherichia coliform ) affected the removal efficiency. It was found that the ultimate removal efficiency was 99% at DO level of 21.34 mg/L, HRT at 60 s and high concentration of E. coli at 10 9 CFU/mL. The morphologic studies also showed that E. coliform could be further mineralized into CO 2 and H 2 O. Dissolved organic carbon, pH and gas chromatograph analysis had justified most importantly the evolution of CO 2 . Experimental results revealed that the photomineralization rate of E. coliform followed pseudo-first-order kinetics by the role of DO. The derived empirical models were found consistent with the proposed reaction pathways of a combined UV breakdown on mass cell and a dual-site Langmuir–Hinshelwood mechanism where the rate-controlling step is the surface interaction between the adsorbed cleavage bacterial cells and hydroxyl radicals. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Water Research Elsevier

Photocatalytic degradation of E. coliform in water

Water Research, Volume 37 (14) – Aug 1, 2003

Loading next page...
 
/lp/elsevier/photocatalytic-degradation-of-e-coliform-in-water-TABvtzdnEU
Publisher
Elsevier
Copyright
Copyright © 2003 Elsevier Science Ltd
ISSN
0043-1354
D.O.I.
10.1016/S0043-1354(03)00228-8
Publisher site
See Article on Publisher Site

Abstract

This study aims to further investigate the total mineralization of the bacteria to the extent of death and cell-mass inactivation using a TiO 2 –Fe 2 O 3 membrane photocatalytic oxidation reactor. Experimental results clearly indicated that dissolved oxygen (DO), hydraulic retention time (HRT) and concentration of the model bacteria ( Escherichia coliform ) affected the removal efficiency. It was found that the ultimate removal efficiency was 99% at DO level of 21.34 mg/L, HRT at 60 s and high concentration of E. coli at 10 9 CFU/mL. The morphologic studies also showed that E. coliform could be further mineralized into CO 2 and H 2 O. Dissolved organic carbon, pH and gas chromatograph analysis had justified most importantly the evolution of CO 2 . Experimental results revealed that the photomineralization rate of E. coliform followed pseudo-first-order kinetics by the role of DO. The derived empirical models were found consistent with the proposed reaction pathways of a combined UV breakdown on mass cell and a dual-site Langmuir–Hinshelwood mechanism where the rate-controlling step is the surface interaction between the adsorbed cleavage bacterial cells and hydroxyl radicals.

Journal

Water ResearchElsevier

Published: Aug 1, 2003

References

  • Disinfection effects of chlorine dioxide on viruses, algae and animal planktons in water
    Huang, J.L.; Wang, L.; Ren, N.Q.; Liu, X.L.; Sun, R.F.; Yang, G.L.
  • Disinfection effects of chlorine dioxide on viruses, algae and animal planktons in water
    Junli, H.; Li, W.; Nenqi, L.; Li, L.X.; Fun, S.R.; Guanle, Y.
  • The photo-oxidative degradation of sodium dodecyl sulphate in aerated aqueous TiO 2 suspension
    Lea, J.; Adesina, A.A.

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create folders to
organize your research

Export folders, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off