Sequential photochemical-biological degradation of chlorophenols
(2007) In Chemosphere 66(11). p.2201-2209- Abstract
- 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 50mg 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 Lipediurn sativurn was similar after all pre-treatments. Chlorophenol photodegradation was always well described by a first order model kinetic (r(2) > 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... (More)
- 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 50mg 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 Lipediurn sativurn was similar after all pre-treatments. Chlorophenol photodegradation was always well described by a first order model kinetic (r(2) > 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. (c) 2006 Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/692783
- author
- Essam, Tamer LU ; Amin, Magdy Aly ; El Tayeb, Ossama ; Mattiasson, Bo LU and Guieysse, Benoit LU
- organization
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- hazardous pollutants, advanced oxidation processes, biodegradation, industrial wastewater, photodegradation
- in
- Chemosphere
- volume
- 66
- issue
- 11
- pages
- 2201 - 2209
- publisher
- Elsevier
- external identifiers
-
- wos:000248678100022
- scopus:33846084395
- ISSN
- 1879-1298
- DOI
- 10.1016/j.chemosphere.2006.08.036
- language
- English
- LU publication?
- yes
- id
- a0f76a8e-4a7d-4877-a11a-41cb0dd29876 (old id 692783)
- date added to LUP
- 2016-04-01 12:20:58
- date last changed
- 2022-04-21 06:16:04
@article{a0f76a8e-4a7d-4877-a11a-41cb0dd29876,
abstract = {{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 50mg 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 Lipediurn sativurn was similar after all pre-treatments. Chlorophenol photodegradation was always well described by a first order model kinetic (r(2) > 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. (c) 2006 Elsevier Ltd. All rights reserved.}},
author = {{Essam, Tamer and Amin, Magdy Aly and El Tayeb, Ossama and Mattiasson, Bo and Guieysse, Benoit}},
issn = {{1879-1298}},
keywords = {{hazardous pollutants; advanced oxidation processes; biodegradation; industrial wastewater; photodegradation}},
language = {{eng}},
number = {{11}},
pages = {{2201--2209}},
publisher = {{Elsevier}},
series = {{Chemosphere}},
title = {{Sequential photochemical-biological degradation of chlorophenols}},
url = {{http://dx.doi.org/10.1016/j.chemosphere.2006.08.036}},
doi = {{10.1016/j.chemosphere.2006.08.036}},
volume = {{66}},
year = {{2007}},
}