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



摘要Optimal physico-chemical conditions for the photocatalytic degradation of pentachlorophenol (PCP) by UV-TiO2 system were determined. Under the optimized conditions (200 mg/L of TiO2, 6.7 mM of H2O2, 17 mW/cm2 UV and pH at 10), the removal of total organic carbon (TOC) reached 95% after 60 min. The degradation pathway was 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). There was no detectable intermediates found after 60 min treatment.

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, the photocatalytic treatment shows 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, while reduced toxicity was found for amphipod survival test.
著者Wong Po Keung
會議名稱Applied Environmental Nanotechnology Workshop
會議地點Hong Kong University of Science and Technology
關鍵詞Photocatalysis, Pentachloropehnol Detoxification

上次更新時間 2018-23-05 於 12:50