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

Comparison between continuous and intermittent ozonation for remediation of soils contaminated with polycyclic aromatic hydrocarbons

“…In the present study, the soils were characterized as low water, low SOM (Table 1), which would benefit PAH degradation by ozonation. Similar results were seen in previous studies (Eberius et al 1997;Masten and Davies 1997;Goi and Trapido 2004;Hong et al 2008;Luster-Teasley et al 2009;Rivas et al 2009). In soils, ozone can be readily decomposed upon reacting SOM and metal oxide to produce OH radical (Choi et al 2002;Jung and Choi 2003), which is a powerful, effective, nonspecific oxidizing agent.…”

“…Ozone reacted with PAHs by bond attack to produce the quinone or hydroxyl functional groups and by atom attack to cause ring cleavage resulting in phenyl-naphthyl-type products (Yao et al 1998a, b). Ozonation has been established as a promising approach for the remediation of PAH-contaminated soils under unsaturated or saturated conditions (Eberius et al 1997;Masten and Davies 1997;Goi and Trapido 2004;Goi et al 2006;Hong et al 2008;Luster-Teasley et al 2009;Rivas et al 2009). Furthermore, several field sites contaminated with petroleum were successfully remediated using in situ ozone sparging system (Nimmer et al 2000).…”

Effects of ozonation on soil organic matter of contaminated soil containing residual oil

“…Many studies have focused on the removal of contaminants (Luster-Teasley et al 2009;O'Mahony et al 2006;Rivas et al 2009) but only a few have addressed the side effects of ozonation, such as the change in SOM and its consequences. The influence of chemical oxidation on SOM is an important issue associated with the technology because SOM has been shown to play an important role in the sequestration of HOCs in soil.…”

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

“…The authors rationalized their observations in that a finer particle size involved a larger specific surface area and so a higher ozone dissolution rate and so more dissolved ozone oxidized the anthracene. Consequently, the differences observed here are not only related to soil texture but also to soil characteristics, particularly soil moisture content [206,208,213,214]. …”

“…Oxidation is mostly performed by batch experiments; column experiments are fewer [37,195,208,214,228,239,240]. Oxidation conditions for batch experiments are highly diversified.…”