Effects of heat-activated persulfate oxidation on soil microorganisms

Combining in situ chemical oxidation, stabilization, and anaerobic bioremediation in a single application to reduce contaminant mass and leachability in soil

“…All these studies showed that, any negative impact of activated persulfate on native soil microorganisms was temporary, and that microbial activity was restored soon after persulfate activation. [30] reported that temperatures in excess of 40 • C used to activated persulfate doses as high as 10 g/L had little impact on cell density and acetate consumption (a general indicator of microbial activity). Tsitonaki [28] showed that aerobic biodegradation of creosote compounds in soil columns recovered within 2 weeks after heat activation of persulfate concentrations as high as 30 g/L.…”

Application of persulfate to remediate petroleum hydrocarbon-contaminated soil: Feasibility and comparison with common oxidants

“…In addition, since sulfate free radicals have a higher redox potential than permanganate, higher removal efficiency could be achieved by persulfate with sequential injections of ferrous ion. Generally, the advantages of using persulfate oxidation include the following: (1) persulfate is more persistent than hydrogen peroxide in the subsurface; (2) no heat or precipitation was produced by persulfate; (3) persulfate is colorless; (4) persulfate is less harmful to in situ microorganisms; and (5) longer radius of influence can be achieved due to the high solubility of persulfate (40%) [20,50,51]. Thus, persulfate oxidation could serve as an option for the remediation of petroleum-hydrocarbon contaminated soil.…”

Performance of α-methylnaphthalene degradation by dual oxidant of persulfate/calcium peroxide: Implication for ISCO

“…PS has some superiorities over permanganate and HP in the field application, such as high water solubility, high stability in subsurface and relatively low cost [18]. In addition, PS and its product (SO 4 2À ) have minimal impact on native bacteria colonies thus have little effect on bioremediation [19]. Commonly, sulfate radicals can be generated from PS activated by heat, ultraviolet (UV) light and metal ions.…”