Petroleum oxidation using Fenton's reagent over beach sand following a spill.
Removal and oxidation of petroleum adhered onto the beach sand after a spill over Guanabara Bay in Rio de Janeiro (Brazil) have been studied using Fenton's reagent (Fe2+ + H2O2). Jar tests were done on 5 and 20 g sand suspended in 200 ml aqueous solution containing iron(II) salt and hydrogen peroxide under constant stirring. The H2O2(g):Fe(g)2+ ratio varied from 0.5:1 to 50:1, pH was 2.0 and 6.0 and reaction time 1 and 3 h. Initially, the contaminated sand content of oil and grease (O&G) was 32 g/kg sand. The statistical analysis showed time and iron-sand and H2O2-iron-sand interactions to be the most significant variables, with an average O&G removal from the contaminated sand being just 30% after 3 h reaction. However, oil was removed from the sand (by up to 97%) and passed to the aqueous phase, making waste final disposal easier. The post-reaction analysis showed the supernatant to be biodegradable. Chromatographic analysis results were that the Fenton's reaction favored both the change and reduction of oil saturated and aromatic fractions.
Department of Biochemical Engineering, School of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
Valéria S
VS
Millioli
Denize D C
DD
Freire
Magali C
MC
Cammarota
D001673:Biodegradation, Environmental; D001938:Brazil; D002849:Chromatography, Gas; D006861:Hydrogen Peroxide / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D010084:Oxidation-Reduction; D010578:Petroleum; D012822:Silicon Dioxide; D012989:Soil Pollutants / Q000302:isolation & purification*
C045076:Fenton's reagent; D010578:Petroleum; D012989:Soil Pollutants; D012822:Silicon Dioxide; D006861:Hydrogen Peroxide; D007501:Iron