Removal of sorbed polycyclic aromatic hydrocarbons from soil, sludge and sediment samples using the Fenton’s reagent process

Parameters explaining removal of PAHs from sewage sludge by ozonation

“…This means that ozone reactivity is higher for totally aromatic PAHs than for compounds with a 5-carbon ring. This effect may be explained by the high reactivity of 18 Another parameter of importance is the number of aromatic rings. Its influence is less than that of the number of 5-carbon rings and it also always appears with a negative coefficient.…”

“…17 • The number of 5-carbon rings (N 5C ), which was taken into account to explain degradation of PAHs adsorbed on sludge with Fenton system. 18 • The water-solubility logarithm (log s) used to explain ozonation of PAHs in oil/water emulsions. 6 • The octanol-water partitioning coefficient logarithm (log K ow ), which was considered to interpret anaerobic biodegradation of PAHs in sludge.…”

Avaliação da potencialidade de processos pseudo-fenton para remediação de solos contaminados por diesel

“…No entanto, é consensual que o pH e as concentrações de peróxido de hidrogênio e de ferro influenciam a velocidade da reação. [13][14][15] O território brasileiro caracteriza-se por uma grande diversidade de tipos de solos. Destes, os Latossolos ocupam 38,7% da área total do país, distribuindo-se em quase todo território nacional.…”

Trace organic contaminants in biosolids: Impact of conventional wastewater and sludge processing technologies and emerging alternatives

“…Qiang et al [141] observed that ozone treatment of sludge at [ Table 2] (Table 2). Flotron et al [142] reported that only a moderate removal of three polycyclic aromatic hydrocarbons was achieved because natural organic matter in sludge competed with the pollutants for OH· radicals. Zheng et al [143] found that decreasing the pH of the Fenton reaction mixture from 2 to 4 increased the removal of 11 polycyclic aromatic hydrocarbons from 20 to 30% due to higher stability of the reaction components at lower pH.…”