Results 261 to 270 of about 104,175 (308)

Heterogeneous photocatalytic degradation of nitrophenols

Journal of Photochemistry and Photobiology A: Chemistry, 2003
The photocatalytic degradation of 2-, 3- and 4-nitrophenol has been investigated in oxygenated aqueous suspensions containing TiO2. The organic reaction intermediates have been determined by high performance liquid chromatography. The results indicate the complete mineralisation of the substrates and the formation of both nitrate and ammonium ions ...
Di Paola A, Augugliaro V, Palmisano L, Pantaleo G, Savinov E   +4 more
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Photocatalytic Degradation of Metoprolol Tartrate

Topics in Catalysis, 2013
The advanced oxidation of high purity metoprolol tartrate, extracted from a commercial medicament, with TiO2 and UV light (365 nm) was investigated to determine the effect of initial reactant concentration on the reaction rate and the role of direct photolysis on the photocatalytic process.
Edgar Moctezuma, Elisa Leyva, Mariana López, Alfonso Pinedo, Brenda Zermeño, Benito Serrano   +5 more
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Photocatalytic Degradation of Hexaethylene Glycol

Catalysis Letters, 2017
Polyethylene glycol (PEG) photodegradation was studied in water under UV irradiation in the presence of catalytic amount of TiO2 using hexaethylene glycol as a model compound. Full conversion was achieved in 7 h with an average quantum yield around 1%. Formic acid was found to be the main intermediate and was slower to oxidize into CO2 (traces remains ...
Simangoye Ngobissi, Drocilia Ednah, Soufi, Jihène, Vanoye, Laurent, Richard, Dominique   +3 more
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Photocatalytic degradation of 2,4,6-trinitrotoluene

Science in China Series B: Chemistry, 2008
A Pt/TiO 2 photocatalyst was used in the photocatalytic degradation of 2,4,6-trinitrotoluene (TNT) under the irradiation of the simulated sunlight. The results show that the destruction of TNT is faster and more complete with the photocatalyst. The photocatalytic degradation of TNT follows first order kinetics.
XiuHua Liu, YiBei Fu, HeYi Wang, ZhiJing Zhong, YunShu Xu   +4 more
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Photocatalytic Degradation of Perfluorooctanoic Acid

2014
Perfluorooctanoic acid (PFOA) is an emerging persistent organic pollutant receiving increasing attention due to its global occurrence and resistance to most conventional degradation methods. Some special techniques such as ultrasonication, aqueous electron reduction, persulfate photolysis, and phosphotungstic-acid photocatalysis have been developed to ...
Pengyi Zhang, Zhenmin Li
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Solar photocatalytic degradation of Aldrin

Catalysis Today, 2002
Abstract Photocatalytic degradation of the pesticide Aldrin dissolved in water was carried out, in one case, using concentrated solar radiation and, in another case, using non-concentrated solar radiation. In these experiments, the effects of catalyst concentration, oxidant agent concentration, and solar irradiation were tested.
Erick R Bandala, Silvia Gelover, Maria Teresa Leal, Camilo Arancibia-Bulnes, Antonio Jimenez, Claudio A Estrada   +5 more
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The Photocatalytic Degradation of Imazapyr

Monatshefte für Chemie - Chemical Monthly, 2007
The degradation of imazapyr, an imidazolinone herbicide, in aqueous solution has been investigated with TiO2 slurry as photocatalyst at 30°C under UV radiation. The depletion of imazapyr concentration in an aqueous suspension followed 1st order kinetic behavior.
Josy Anteveli Osajima, Hamilton M. Ishiki, Keiko Takashima   +2 more
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PHOTOLYTIC AND PHOTOCATALYTIC DEGRADATION OF PHARAMCEUTICALS

2016
Pharmaceuticals are highly diverse group of compounds used for treating and preventing diseases in humans and animals. They are designed to be biologically active and therefore they might negatively affect non- target living organisms. Owing to the advances of different analytical methodologies during the last decade, the widespread occurrence of these
Čizmić, Mirta, Babić, Sandra, Ćurković, Lidija, Ljubas, Davor   +3 more
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Photocatalytic degradation of E. coliform in water

Water Research, 2003
This study aims to further investigate the total mineralization of the bacteria to the extent of death and cell-mass inactivation using a TiO2-Fe2O3 membrane photocatalytic oxidation reactor. Experimental results clearly indicated that dissolved oxygen (DO), hydraulic retention time (HRT) and concentration of the model bacteria (Escherichia coliform ...
Darren Delai, Sun, Joo Hwa, Tay, Koh Min, Tan   +2 more
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Photocatalytic Degradation Of Dyes

Introduction Water pollution is an escalating global issue, with industrial effluents being one of the major contributors. Many synthetic dyes are known to be toxic, carcinogenic, and mutagenic. When released into aquatic ecosystems without adequate treatment, they can significantly reduce light penetration, disrupt photosynthetic activity in aquatic ...
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