Degradation of dimethyl phthalate (DMP) in aqueous solution by UV/Si–FeOOH/H2O2

Review on the application of modified iron oxides as heterogeneous catalysts in Fenton reactions

“…In other iron oxides, the incorporated transition metal replaced Fe III cations (Silva et al, 2009(Silva et al, , 2011. For non-metal incorporations, the ion forms a complex with structural iron as reported by Yuan et al (2011) for Si-goethite.…”

“…A large number of studies have dealt with introduction of the transition metals of period 4 in periodic table such as Titanium (Liang et al, 2012;Yang et al, 2009a;Zhong et al, 2012), Vanadium (Liang et al, 2012(Liang et al, , 2010, Chromium (Magalhães et al, 2007;Zhong et al, 2013), Manganese (Coker et al, 2008;Costa et al, 2003;Oliveira et al, 2000), Cobalt (Coker et al, 2008;Costa et al, 2003;Lelis et al, 2004), Nickel (Coker et al, 2008;Costa et al, 2003), Copper (Lee and Joe, 2010), Zinc (Coker et al, 2008) and other metals like Aluminium (Jentzsch et al, 2007) into the magnetite structure. Several other studies related to goethite, hematite or maghemite impregnated with Manganese (Alvarez et al, 2006;, Copper (Guimaraes et al, 2009), Nickel (Krehula et al, 2005), Zinc , Niobium (Silva et al, 2009), Silicon (Yuan et al, 2011) and Gallium (dos Santos et al, 2001) or with metal oxides (Baldrian et al, 2006;Nie et al, 2009;Oliveira et al, 2007) also were carried out. Careful study of the recent investigations reported in the literature indicate that such catalysts can be considered as modern promising heterogeneous catalysts capable of activating Fenton oxidation of recalcitrant compounds with or without the illumination of UVeVis light.…”

Degradation of methylene blue with magnetic Co-doped Fe3O4@FeOOH nanocomposites as heterogeneous catalysts of peroxymonosulfate

“…was converted to TM 2+ (eqn (15) and (16)). 43,44 In addition, eqn (17) and (18) explain the quenching process of SO 4 À c and the generation of $OH. 32,45 Co 2+ and Fe 2+ both can be regenerated according to eqn (11) and (13) As discussed before, the reaction rate of the system can increase with the increased pH; this is because SO 4 À c can react with hydrone and hydroxide to produce $OHSO 4 À c$OH, which has a higher oxidation-reduction potential (2.80 eV).…”

“…Considering its abundance, availability, relative stability and cost-effectiveness, goethite (a-FeOOH) has been widely used as a heterogeneous catalyst. 17,18 However, its catalytic activity decreases rapidly under neutral or even alkaline conditions. 19,20 a-FeOOH is mostly applied in the form of ne powders, which leads to difficult solid/liquid separation and recycling.…”

Silicon-modified ferric hydroxide for catalytic ozonation of nitrobenzene in aqueous solution

“…FeOOH, due to its simple preparation process, low cost, high surface area, and stable chemical properties, has been widely used as a catalyst in water treatment processes, such as catalytic ozonation of benzene compounds, control of trihalomethane formation potential, and degradation of methyl orange [8][9][10][11]. However, studies have shown many discrepancies of FeOOH.…”