Formation of oxygen complexes by ozonation of carbonaceous materials prepared from cherry stones

Surface oxygenation of biochar through ozonization for dramatically enhancing cation exchange capacity

“…This increase of oxygen functionality in the biochar samples is also supported by the mechanism proposed previously by Gómez-Serrano et al, which states that the electrophilic ozonolysis of carbon (C=C) double bonds in olefinic structures is expected to occur in a process involving three steps: (1) 1,3-dipolar addition of ozone to the double bond to yield an unstable primary ozonide; (2) decomposition of the primary ozonide by a 1,3-dipolar reversion to yield a carbonyl compound and a carbonyl oxide; and (3) the carbonyl oxide may yield a normal ozonide, dimerizes to aldehyde or ketone diperoxides, or polymerizes to yield polymeric peroxides or ozonides (Gómez-Serrano et al 2002).…”

Ozonation of activated carbons: Effect on the adsorption of selected phenolic compounds from aqueous solutions

“…The oxygen containing surface functional groups were determined according to Boehm titration. Details of the particular procedure followed can be found in a previous work [18].…”

“…In addition, SOG can easily be fixed on activated carbon by using oxidizing solutions (i.e., nitric acid, hydrogen peroxide, and ammonium persulfate) or gases (i.e., air, oxygen, and ozone). Particularly, the literature provides a number of studies about carbon surface treatment with ozone, many of them very recent [7,[15][16][17][18][19][20][21][22][23]. These works give a fundamental understanding of the effects of ozone on GAC and its impact on adsorptive properties of given compounds.…”

Strategies and Technology for Managing High-Carbon Ash

“…The literature provides much insight into carbon surface chemistry and its role in adsorption [3,[13][14][15][16] but this role depends greatly on the adsorbate and very few of these studies have examined surfactants [3,4]. A number of studies have examined carbon surface treatment with ozone [7,13,[17][18][19][20][21][22][23][24][25][26], but only our recent work has focused on its effect on surfactant adsorptivity [7]. This previous study did not yield a complete understanding on adsorption mechanism, in large part due to the complexity of the ash/surfactant system.…”