Effect of Fenton and photo-Fenton reactions on the degradation and biodegradability of 2 and 4-nitrophenols in water treatment

Fundamental Mechanistic Studies of the Photo-Fenton Reaction for the Degradation of Organic Pollutants

“…types of AOPs that have been proposed in the literature include (oxidant [catalyst, when present]/light): H 2 O 2 /UV (Gryglik et al, 2010;Ho & Bolton, 1998); O 3 /UV (Esplugas et al, 1994;Machulek et al, 2009a); O 3 -H 2 O 2 /UV (Yue, 1993); [TiO 2 ]/UV (Gaya & Abdullah, 2008;Henderson, 2011;Jenks, 2005;Matthews, 1992); Fe(III)/[TiO 2 ]/UV-Vis (Domínguez et al, 1998); direct photolysis of water with vacuum UV (Gonzalez et al, 2004); Fenton reaction or H 2 O 2 -Fe(II) (Dao & Laat, 2011;Haddou et al, 2010;Kwon et al, 1999;Pignatello et al, 2006;Pontes et al, 2010); and the photo-Fenton reaction or H 2 O 2 [Fe(II)/Fe(III)]/UV (Benitez et al, 2011;Kim & Vogelpohl, 1998;Kiwi et al, 1994;Machulek et al, 2007;Martyanov et al, 1997;Nichela et al, 2010;Pignatello et al, 2006;Ruppert et al, 1993). In most AOP, the objective is to use systems that produce the hydroxyl radical, HO…”

Degradation of Acrylic Acid-Grafted Cellulose in Aqueous Medium With Radical Initiators

“…The ability to use Fenton-based systems in dark or light irradiation has been a topic of interest in the field of advanced oxidation technologies involving degradation of polulants. It has been found that illumination of the Fe 2+ -Fe 3+ -H 2 O 2 system increases the degradation rate of many organic substances [16,17]. Photo -Fenton catalityc of an azo -dye, Orange II, has been studied.…”

PHOTO-FENTON REACTION OF DYES WITH Fe(III)-TREATED HYDROXYAPATITES AS HETEROGENEOUS CATALYSTS IN WATER

“…Although some homogeneous photo-Fenton systems using Fe ions [20][21][22][23][24][25] feature a merit of powerful degradation of organic compounds, they have a disadvantage of requirement to remove Fe ions from water after water treatment. 9 From a viewpoint of smoothing and recycling usage, or running cost in future water purification plants, a heterogeneous system must be superior to homogenous one.…”