Decolorization of synthetic dyes by hydrogen peroxide with heterogeneous catalysis by mixed iron oxides

Preparation of magnetite-based catalysts and their application in heterogeneous Fenton oxidation – A review

“…As can be seen in Figure 4a, the interest of the scientific community on this field started only around 2008 and has been increasingly growing in the last years. Before that, several attempts studying the potential application of magnetite and other natural minerals as catalysts in Fenton oxidation were carried out [36][37][38][39][40]. However, the first work published devoted uniquely to magnetite as CWPO catalyst is that reported by Zhang et al (2008) [41], who studied the degradation of phenol by Fenton oxidation using ferromagnetic nanoparticles (MNPs).…”

Photoassisted degradation of endocrine disruptors over CuOx–FeOOH with H2O2 at neutral pH

“…Recently, several copper-and iron-based heterogeneous Fenton-like systems have been reported [9][10][11][12][13], which exhibited high activity in degradation of organic pollutants. However, few studies were conducted to investigate the catalytic activity of a nanoscale bimetallic catalyst consisting of Cu and Fe in degrading EDs via photo-Fenton reaction.…”

The contribution of vanadium and titanium on improving methylene blue decolorization through heterogeneous UV-Fenton reaction catalyzed by their co-doped magnetite

“…Predetermined amount of FeSO 4 and TiCl 4 was dissolved in an HCl solution. 1.0 mL hydrazine was added to prevent the oxidation of ferrous cations, and pH was low enough (<1) to prevent iron oxidation and hydroxide precipitation.…”

“…The temperature was controlled at 25 • C. The initial pH of solution was adjusted to 7.0 by H 2 SO 4 and NaOH solution. The suspension containing 20.0 mg dry adsorbent and 20 mL varying concentrations (12.5-100 mg L −1 ) of MB solution was constantly magnetically stirred for 1 h, predetermined time for achieving adsorption equilibrium.…”

“…Especially in environmental engineering, the incorporation of transition metals into magnetite, such as Mn, Cr and Co, can greatly increase the heterogeneous Fenton catalytic activity of magnetite with high efficiency and easy recycle in wastewater purification, e.g. printing and dyeing water [4,5] and wastewater containing persistent organics [6]. Metalsubstituted magnetites have been considered as an outstanding candidate of catalysts in advanced oxidation processes (AOPs).…”