The removal of low level inorganics via electrogenerated hydrogen peroxide in the presence of catalytic amounts of Fe2+.
Low level phosphites and hypophosphites were completely converted into phosphates, via hydrogen peroxide generated by cathodic reduction of oxygen in acidic aqueous medium at a reticulated vitreous carbon electrode, in the presence of little amounts of Fe2+. The contemporary regeneration of Fe2+ by cathodic reduction of Fe3+, produced by the well known Fenton reaction, furnishes an excellent way to continuously produce little amounts of the Fenton reactive and, as a consequence, of the powerful oxidant hydroxyl radical HO.. The best conditions for the complete removal of phosphorous as phosphites and hypophosphites are reported.
Marrosu
G
G
Dipartimento di Ingegneria C.M.M.P.M., Università di Roma La Sapienza Via del Castro Laurenziano, 7 00161 Roma, Italy. giancarlo.marrosu@uniroma1.it
Petrucci
R
R
Trazza
A
A
D004572:Electrolysis; D005296:Ferrous Compounds / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007202:Indicators and Reagents; D007501:Iron; D010084:Oxidation-Reduction; D010100:Oxygen; D010710:Phosphates / Q000737:chemistry*; D017905:Phosphites / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis
C045076:Fenton's reagent; D005296:Ferrous Compounds; D007202:Indicators and Reagents; D010710:Phosphates; D017905:Phosphites; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide; D007501:Iron; D010100:Oxygen