Photodegradation of orange I in the heterogeneous iron oxide–oxalate complex system under UVA irradiation

Enhancement of the reductive transformation of pentachlorophenol by polycarboxylic acids at the iron oxide–water interface

“…Hematite was obtained by sintering γ -FeOOH powder at 420 • C for 2 h [21]. The X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET) analysis were presented in our previous studies [21,22]. In order to investigate the change of iron oxide morphologies along with the dechlorination process, the iron oxides were collected and freeze dried after seven days of dechlorination of 0.038 mM PCP with 4 g/L different iron oxides and 1 mM oxalic acid.…”

“…The three iron oxides, lepidocrocite, goethite and hematite, were obtained by referring the XRD analysis results to standard X-ray diffraction (XRD) cards of the three iron oxides [29], as reported in our previous paper [21,22]. The average crystal size of γ -FeOOH was 13.7 nm, α-Fe 2 O 3 54.7 nm and α-FeOOH 41.9 nm, which deduced from Scherrer formula with the corresponding strongest XRD peaks [30].…”

Decolorization of KN-R catalyzed by Fe-containing Y and ZSM-5 zeolites

“…But it has the shortcoming that Fe ions remain in the treated water, and additional step is needed to remove them. Efforts have been made to develop heterogeneous Fenton-like catalysts to overcome this shortcoming, which include supported Fe ions, clusters or oxides [3][4][5][6][7][8][9][10]. Mesoporous molecular sieves have drawn much attention due to their great surface area, high uniformity and easily controllable pore size.…”

Photodegradation of 2-mercaptobenzothiazole in the γ-Fe2O3/oxalate suspension under UVA light irradiation

“…Hence, it can be expected that Fe(III)-oxalate complexes could undergo photochemical reactions in surface soil and surface water. In the past decade, several studies had reported the photochemical process of Fe(III)-oxalate and iron oxide-oxalate systems for degradation of organic pollutants [17][18][19][20][21]. For iron oxide-oxalate suspension system, Fe(III)-oxalate complexes includes dissolved ones and adsorbed ones [20,21].…”

“…In the past decade, several studies had reported the photochemical process of Fe(III)-oxalate and iron oxide-oxalate systems for degradation of organic pollutants [17][18][19][20][21]. For iron oxide-oxalate suspension system, Fe(III)-oxalate complexes includes dissolved ones and adsorbed ones [20,21]. During the photochemical reaction of Fe(III)-oxalate complexes, dissolved Fe(II) and Fe(III) species, adsorbed Fe(II) and Fe(III) species, the superoxides and hydroperoxyl radicals (O 2…”