Humic acid coated Fe3O4 magnetic nanoparticles as highly efficient Fenton-like catalyst for complete mineralization of sulfathiazole

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

“…That was mainly attributed to iron leaching (≈1 mg L -1 ). Xu and Wang (2012b) [108] also found a loss of activity upon 6 runs (from 100% to 40% conversion for 1 st to 6 th runs, respectively) in In contrast to the relatively low stability of some nanocomposites, Niu et al (2011) [110] demonstrated that humic acid-coated MNPs present a remarkable stability in CWPO of sulfathiazole, maintaining complete conversion upon 3 successive runs. However, these authors did not provide information about TOC reduction upon sequential cycles.…”

Interfacial mechanisms of heterogeneous Fenton reactions catalyzed by iron-based materials: A review

“…Fe 3 O 4 /humic acid (Fe 3 O 4 /HA) (Niu et al, 2011), prussian blue modified γ-Fe 2 O 3 (PBMNPs) (Wang and Huang, 2011;Zhang et al, 2010) (Costa et al, 2008), FeO x H 2x-3 /Fe 0 , iron oxide/Fe 0 (Nie et al, 2008(Nie et al, , 2010.…”

“…Other iron minerals and iron (hydr)oxides including naturally existing pyrite (Matta et al, 2007), green rust (Hanna et al, 2010), limonite (Souza et al, 2009) and synthesized ferrous hydroxide colloids (Yan et al, 2012), nano δ-FeOOH (Pinto et al, 2012), Fe 3 O 4 / HA (Niu et al, 2011), PBMNPs (Wang and Huang, 2011;Zhang et al, 2010), Fe 0 /iron oxide (Costa et al, 2008;Nie et al, 2008Nie et al, , 2010, etc., are effective heterogeneous Fenton catalysts. Due to the low iron leaching and the limited reactivity of the reaction filtrate, most of the reaction systems follow the heterogeneous catalysis mechanism.…”

“…(10)- (11)). Hanna et al (2010) found that the reactivity of GR(Cl Hence, accelerating the electron transfer from Fe(III) to Fe(II) on iron (hydr)oxides surfaces can greatly enhance the catalytic activity (Costa et al, 2008;Nie et al, 2007Nie et al, , 2008Nie et al, , 2010Niu et al, 2011;Zhang et al, 2010). For example, Fe 3 O 4 /HA showed better catalytic activity than Fe 3 O 4 , probably due to the higher reduction potential of complexed Fe(III)-HA/Fe(II)-HA, which could contribute to the rapid regeneration of Fe(II) (Niu et al, 2011 (26)) (Costa et al, 2008), which was also proved by the UOH formation in Fe 0 /iron oxide suspensions (Nie et al, 2008).…”

Synthesis of Fulvic Acid-Coated Magnetite (Fe₃O₄^–FA) and Its Application for the Reductive Adsorption of [AuCl₄]^–

“…3). This result indicated that the crystal structure of Fe3O4 was not change after coating by FA [25,[32][33]. Fe3O4-FA has smaller size indicated that coated Fe3O4 successfully dispersed in smaller size instead of uncoated Fe3O4.…”