Portland cement can activate the persulfate
anion (S2O82) in sodium persulfate (Na2S2O8), chemically oxidizing organic contaminants. Ten doses of Na2S2O8, ranging from 0.25% to 5% (by weight) with a cement:Na2S2O8 ratio of 2:1, completely activatedS2O82 within 2.5 h of mixing. Chemical oxidation removed a significant portion of the contaminants of concern (COCs), including BTEX, naphthalene, and 17 higher molecular weight PAHs.