In situ ozonation of anthracene in unsaturated porous media

Evaluation of soil pH and moisture content on in-situ ozonation of pyrene in soils

“…The sequesterization and interaction of hydrophobic PAH compounds with the soil matrices also impacts the ability to efficiently remediate contaminated soils. Several researchers have investigated adsorption-desorption models and kinetics to represent PAH sequesterization in aqueous and soil systems [10,[12][13][14][15]. Previous studies have suggested that the removal efficiency of phenanthrene and anthracene by ozone decreases in the presence of soil moisture compared to that observed in dry soils [5,15].…”

Selection of oxidant doses for in situ chemical oxidation of soils contaminated by polycyclic aromatic hydrocarbons (PAHs): A review

“…Lastly, carbonate-, bicarbonate-, chloride-, nitrate-, phosphate-or sulphate-bearing minerals can be radical scavengers. Indeed, the associated ions can decrease oxidation efficiency with Fenton's reagent, activated persulphate and ozone because they can react with hydroxyl and sulphate radicals [30,207,208]. For example, Zhang et al [208] studied the oxidation with ozone of a soil spiked with 10 mg kg -1 of anthracene.…”

“…Indeed, the associated ions can decrease oxidation efficiency with Fenton's reagent, activated persulphate and ozone because they can react with hydroxyl and sulphate radicals [30,207,208]. For example, Zhang et al [208] studied the oxidation with ozone of a soil spiked with 10 mg kg -1 of anthracene. When they added 2 g kg -1 of sodium bicarbonate to soil samples, oxidation efficiency decreased to 41% compared to 56% without sodium bicarbonate addition.…”

Ozonation of trichloroethylene in acetic acid solution with soluble and solid humic acid

“…TCE decomposition was enhanced by small addition of humic acid (less than 8 mg C L −1 ) for all solutions and then decreased with the increase in humic acid concentration. The higher humic acid concentration would work as an ozone scavenger [30,31].…”