Application of photochemical technologies for treatment of landfill leachate

Employing TiO 2 photocatalysis to deal with landfill leachate: Current status and development

“…That's why a number of researchers have applied TiO 2 for MSW leachate treatment [34], [35], [36] or pretreatment [37], [38], and [39] to enhance biodegradability of refractory organic compounds in landfill leachate and post treatment [22], [23], [40] and [41] to attain an acceptable discharge standard of MSW leachate.…”

Photo-Fenton degradation of ammonia via a manganese–iron double-active component catalyst of graphene–manganese ferrite under visible light

“…NH 3 , as a recalcitrant water contaminant, is the final nitrogen species contaminant in landfill leachates released by bio-fermentation [1][2][3] and the predominant product mineralized during photocatalytic degradation of nitrogen-containing organic pollutants [4][5][6][7]. That is, NH 3 is the most stable form of nitrogen-containing species, and breakage of the NAH bond is very difficult to achieve.…”

“…However, the TiO 2 -based material can make use of only approximately 4% of the available solar energy due to wide band gap and 43% of the visible light energy cannot be utilized effectively. As such, novel photocatalysts that respond to visible light irradiation must be developed to decompose NH 3 .…”

“…In fact, graphene can increase photocatalytic activities and widen spectral responses to solar irradiation [23][24][25][26][27][28]. rG-MnFe 2 O 4 hybrid materials have not been previously studied as double-effect heterogeneous photo-Fenton catalysts for degradation of recalcitrant NH 3 . In the current study, we prepare a rG-MnFe 2 O 4 hybrid catalyst and evaluate its photo-Fenton catalytic activities during NH 3 decomposition under visible light irradiation in the presence of hydrogen peroxide (H 2 O 2 ).…”

Synergetic Effect of Ultrasound, the Heterogeneous Fenton Reaction and Photocatalysis by TiO2 Loaded on Nickel Foam on the Degradation of Pollutants

“…As one of advanced oxidation processes (AOP), the Fenton reaction can efficiently degrade various pollutants [1,2,3]. Free radicals are produced in the Fenton reaction, which can damage and degrade organic molecules.…”