Photocatalytic Degradation and Detoxification of Pentachlorophenol
Invited conference paper presented and published in conference proceedings


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AbstractThe optimal physico-chemical conditions of photocatalytic degradation of PCP were determined. For the UV irradiated photocatalytic system (UV-PC), the operating conditions were optimized at 200 mg/L of TiO2, 6.7 mM of H2O2, 17 mW/cm2 of light intensity and pH at 10. For the visible light (VL) irradiated photocatalytic system (VL-PC), the operating conditions were optimized at 500 mg/L of TiO2, 4 mM of H2O2, 1.04 mW/cm2 of light intensity and pH at 6. After 60 min of UV-PC and VL-PC, the removal of total organic carbon (TOC) reached 95 and 80%, respectively.

The degradation pathways of UV-PC and VL-PC were determined by analysis of their degradation products and intermediates by gas chromatography/mass spectrometry (GC/MS). Their major intermediates were tetrachlorohydroquinone (TeHQ) and tetrachlorobenzoquinone (TeBQ). For the UV-PC, there was no detectable intermediates found after 60 min irradiation respectively. However, for the VL-PC, it still had small amount of intermediates remained.

Although photocatalysis is a powerful treatment of contaminated water, it may generate toxic intermediates during the degradation and contribute part of toxicity in the solution. For the Microtox test and amphipod survival test, UV-PC and VL-PC show a reduction on the toxicity of PCP. Based on the results of the study, the toxicity of PCP was non-detectable for Microtox test after 60 min of UV-PCO respectively.
All Author(s) ListWONG Po Keung
Name of Conference2016 Workshop of Chinese Academy of Sciences/State Administration of Foreign Experts Affairs (CAS/SAFEA) International Partnership Program for Creative Research Teams on “Rapid Detection of Toxic Pollutants Nanomaterials and Devices”
Start Date of Conference24/10/2016
End Date of Conference26/10/2016
Place of ConferenceHeifei
Country/Region of ConferenceChina
Proceedings TitleRapid Detection of Toxic Pollutants Nanomaterials and Devices
Year2016
Month10
Day24
PublisherChinese Academy of Sciences
Place of PublicationHefei
Pages1 - 1
LanguagesEnglish-United States
KeywordsPhotocatalysis, Pentachlorophenol

Last updated on 2018-22-01 at 05:54