Photocatalytic oxidation of 2,4,6-trinitrotoluene in the presence of ozone under irradiation with UV and visible light

A review on photocatalytic ozonation used for the treatment of water and wastewater

“…This photocatalyst is relatively inexpensive and commercially available as Degussa P-25, BDH, PSB-P200, TP-2, Sachtleben Hombikat UV100 and Millennium TiONA PC50 [72,86,87]. Some research groups reported preparation of TiO 2 [51,62,64] and also the modification of TiO 2 particles by doping or mixing with activated carbon [5,71], metal oxides [3,34,48,88] and noble metals [73,89] in order to improve photocatalytic properties. However, photocatalysts other than TiO 2 are also used for photocatalytic ozonation treatments [65,90].…”

“…These results were explained by the insertion of manganese ions in the TiO 2 lattice shifting the ability of TiO 2 to produce less hole and electron pairs and consequently, hydroxyl radicals. Likewise, Tomova et al [34] showed that doping Garcia-Araya et al [39] and Beltran et al [68] indicated that performing photocatalytic ozonation at pH 7 using buffered solutions led to a decrease in the mineralisation efficiency compared to unbuffered acidic solutions. This was explained by the formation of bicarbonate ions (as oxidation by-products) which can accumulate in water at pH 7 and scavenge the hydroxyl radicals produced, reducing oxidation efficiency.…”

“…The particular importance of this oxidation method applies to destroying poorly-biodegradable organic compounds or for improving the biological degradability of wastewater samples containing these compounds [19,21]. In general, particular groups of chemical substances such as pharmaceutical compounds [22,23], surfactants [24,25], detergents [26], colouring matters [15,17], organic herbicides and pesticides [27][28][29], aromatic and aliphatic organohalogens [30,31], saturated aliphatic carboxylic acids [32,33], nitroaromatics [12,34], are the primary target compounds for photocatalytic ozonation.…”

Preparation and application of novel catalytic-ceramic-filler in a coupled system for TNT manufacturing wastewater treatment

“…The applied processes mainly include adsorption [4], alkaline hydrolysis [5], photocatalytic [6], catalytic oxidation [7], fenton oxidation [8], vacuum distillation [9] and biological treatment [10], etc. Although these studies obtained a high performance in TNT removal from aqueous solution, very few of them had been applied to practical problems due to rigorous reaction conditions and high operating cost.…”

Synthesis and Application of Magnetic Photocatalyst of Ni-Zn Ferrite/TiO2from IC Lead Frame Scraps

“…Advanced oxidation processes such as UV/H 2 O 2 [2], ozonation [3][4][5], Fenton processes [5][6][7][8], ozone/Fenton [9], and TiO 2 and modified TiO 2 [10][11][12][13][14][15][16][17] are promising alternatives for the mineralization of textile dyes or other pollutants. Among them, semiconductor TiO 2 's simultaneous photocatalytic oxidation and reduction show significant potential due to being photoreactive, nontoxic, chemically and biologically inert, photostable, and lower in cost.…”