Calcium peroxide (CaO₂) has been proven to oxidize various organic pollutants when they exist as a single class of compounds. However, there is a lack of research on the potential of unactivated CaO₂ to treat mixed chlorinated organic pollutants in soils. This study examined the potential of CaO₂ in treating soils co-contaminated with p-dichlorobenzene (p-DCB) and p-chloromethane cresol (PCMC). The effects of CaO₂ dosage and treatment duration on the rate of degradation were investigated. Furthermore, the collateral effects of the treatment on treated soil characteristics were studied. The result showed that unactivated CaO₂ could oxidize mixed chlorinated organic compounds in wet soils. More than 69% of the pollutants in the wet soil were mineralized following 21 days of treatment with 3% (w/w) CaO₂. The hydroxyl radicals played a significant role in the degradation process among the other decomposition products of hydrogen peroxide. Following the oxidation process, the treated soil pH was increased due to the formation of calcium hydroxide. Soil organic matter, cation exchange capacity, soil organic carbon, total nitrogen, and certain soil enzyme activities of the treated soil were decreased. However, the collateral effects of the system on electrical conductivity, available phosphorus, and particle size distribution of the treated soil were not significant. Likewise, since no significant release of heavy metals was seen in the treated soil matrix, the likelihood of metal ions as co-pollutants after treatment was low. Therefore, CaO₂ can be a better alternative for treating industrial sites co-contaminated with chlorinated organic compounds.

过氧化钙 (CaO ₂ ) 已被证明可以氧化各种有机污染物，当它们作为单一类别的化合物存在时。然而，缺乏对未活化 CaO ₂处理土壤中混合氯化有机污染物的潜力的研究。本研究检验了 CaO ₂在处理被对二氯苯 (p-DCB) 和对氯甲烷甲酚 (PCMC) 共同污染的土壤中的潜力。研究了 CaO ₂剂量和处理时间对降解速率的影响。此外，研究了处理对处理过的土壤特性的附带影响。结果表明，未活化的 CaO ₂可以氧化潮湿土壤中的混合氯化有机化合物。用 3% (w/w) CaO ₂处理 21 天后，湿土壤中超过 69% 的污染物被矿化. 在过氧化氢的其他分解产物中，羟基自由基在降解过程中起重要作用。在氧化过程之后，由于氢氧化钙的形成，处理过的土壤 pH 值升高。处理后土壤的土壤有机质、阳离子交换量、土壤有机碳、全氮和某些土壤酶活性均降低。然而，该系统对处理土壤的电导率、有效磷和粒度分布的附带影响并不显着。同样，由于在处理过的土壤基质中没有发现重金属的显着释放，因此处理后金属离子作为共同污染物的可能性很低。因此，CaO ₂ 可以是处理被氯化有机化合物共同污染的工业场所的更好选择。