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231223s2005 xx ||||| 00| ||eng c |
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Zoh, K D
|e verfasserin
|4 aut
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|a Degradation of parathion and the reduction of acute toxicity in TiO2 photocatalysis
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|c 2005
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 12.07.2006
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|a Date Revised 21.11.2013
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|a published: Print
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|a Citation Status MEDLINE
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|a Photocatalytic degradation of methyl parathion was done using a circulating TiO2/UV and TiO2/solar reactor. Indoor experimental results showed that, under the photocatalysis conditions, parathion was more effectively degraded than under the photolysis and TiO2 only conditions. Parathion (38 microM) was completely degraded under photocatalysis within 90 min, and more than 80% TOC decrease after 150 minutes. The main ionic byproducts during the photocatalysis were measured, and almost complete nitrogen recovery was achieved as mainly NO3- NO2-, and NH4+, and 80% of sulfur as recovered as SO4(2)-. Organic intermediates such as nitrophenol and methyl paraoxon were also identified during the photocatalysis of parathion, and these were further degraded after 90 minutes. Microtox bioassay using Vibrio fischeri was used in evaluating the toxicity of solutions treated by photocatalysis and photolysis of parathion. The results showed that the acute toxicity expressed as EC50 almost reduced after 90 min under the photocatalysis condition whereas only 40% reduction of toxicity as EC50 was achieved in photolysis condition. The outdoor results using a TiO2/solar system were similar to the TiO2 indoor system, indicating the possibility of applying TiO2/solar system for the treatment of parathion-contaminated water
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|a Comparative Study
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Insecticides
|2 NLM
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|a Nitrogen Compounds
|2 NLM
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|a titanium dioxide
|2 NLM
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|a 15FIX9V2JP
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|a Parathion
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|a Titanium
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| 700 |
1 |
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|a Kim, T S
|e verfasserin
|4 aut
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|a Kim, J G
|e verfasserin
|4 aut
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| 700 |
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|a Choi, K H
|e verfasserin
|4 aut
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| 773 |
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8 |
|i Enthalten in
|t Water science and technology : a journal of the International Association on Water Pollution Research
|d 1986
|g 52(2005), 8 vom: 24., Seite 45-52
|w (DE-627)NLM098149431
|x 0273-1223
|7 nnns
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| 773 |
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|g volume:52
|g year:2005
|g number:8
|g day:24
|g pages:45-52
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