PMID- 17097127
OWN - NLM
STAT- MEDLINE
DCOM- 20070315
LR  - 20131121
IS  - 0045-6535 (Print)
IS  - 0045-6535 (Linking)
VI  - 66
IP  - 11
DP  - 2007 Feb
TI  - Sequential photochemical-biological degradation of chlorophenols.
PG  - 2201-9
AB  - UV/TiO2/H2O2, UV/TiO2 and UV/H2O2 were compared as pre-treatment processes for 
      the detoxification of mixtures of 4-chlorophenol (4CP), 2,4-dichlorophenol (DCP), 
      2,4,6-trichlorophenol (TCP) and pentachlorophenol (PCP) prior to their biological 
      treatment. When each chlorophenol was initially supplied at 50 mg l(-1), 
      UV/TiO2/H2O2 treatment supported the highest pollutant removal, COD removal, and 
      dechlorination efficiencies followed by UV/TiO2 and UV/H2O2. The remaining 
      toxicity to Lipedium sativum was similar after all pre-treatments. Chlorophenol 
      photodegradation was always well described by a first order model kinetic 
      (r2>0.94) and the shortest 4CP, DCP, TCP and PCP half-lives of 8.7, 7.1, 4.5 and 
      3.3 h, respectively, were achieved during UV/TiO2/H2O2 treatment. No pollutant 
      removal was observed in the controls conducted with H2O2 or TiO2 only. 
      Inoculation of all the photochemically pre-treated mixtures with activated sludge 
      microflora was followed by complete removal of the remaining pollutants. Combined 
      UV/TiO2/H2O2-biological supported the highest detoxification, dechlorination 
      (99%) and COD removal (88%) efficiencies. Similar results were achieved when each 
      chlorophenol was supplied at 100 mg l(-1). COD and Cl mass balances indicated UV, 
      UV/H2O2, and UV/TiO2 treatments lead to the formation of recalcitrant 
      photoproducts, some of which were chlorinated.
FAU - Essam, Tamer
AU  - Essam T
AD  - Department of Biotechnology, Lund University, P.O. Box 124, S-22100 Lund, Sweden.
FAU - Amin, Magdy Aly
AU  - Amin MA
FAU - el-Tayeb, Ossama
AU  - el-Tayeb O
FAU - Mattiasson, Bo
AU  - Mattiasson B
FAU - Guieysse, Benoit
AU  - Guieysse B
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20061109
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Chlorophenols)
RN  - 0 (Environmental Pollutants)
RN  - 0 (Sewage)
RN  - 15FIX9V2JP (titanium dioxide)
RN  - BBX060AN9V (Hydrogen Peroxide)
RN  - D1JT611TNE (Titanium)
SB  - IM
MH  - Bacteria/metabolism
MH  - Biodegradation, Environmental
MH  - Chlorophenols/*chemistry/metabolism
MH  - Chromatography, High Pressure Liquid
MH  - Environmental Pollutants/*chemistry/metabolism
MH  - Environmental Pollution/*prevention & control
MH  - Half-Life
MH  - Hydrogen Peroxide/*chemistry
MH  - Kinetics
MH  - Photochemistry/*methods
MH  - Sewage/microbiology
MH  - Titanium/*chemistry
MH  - *Ultraviolet Rays
EDAT- 2006/11/14 09:00
MHDA- 2007/03/16 09:00
CRDT- 2006/11/14 09:00
PHST- 2006/05/02 00:00 [received]
PHST- 2006/08/16 00:00 [revised]
PHST- 2006/08/18 00:00 [accepted]
PHST- 2006/11/14 09:00 [pubmed]
PHST- 2007/03/16 09:00 [medline]
PHST- 2006/11/14 09:00 [entrez]
AID - S0045-6535(06)01176-3 [pii]
AID - 10.1016/j.chemosphere.2006.08.036 [doi]
PST - ppublish
SO  - Chemosphere. 2007 Feb;66(11):2201-9. doi: 10.1016/j.chemosphere.2006.08.036. Epub 
      2006 Nov 9.