Petroleum‐contaminated soil (PCS) is urgently to be remediated due to its risk to ecological environment and human health. In this study, a Fenton oxidation–pyrolysis strategy was employed to accomplish effective petroleum removal and PCS remediation. The highest total petroleum hydrocarbon removal efficiency could achieve 99.6% after 2 h Fenton oxidation, with H2O2/Fe2+, 6:1, and pH 3, followed by pyrolysis at 370°C. The organic compositions of the soil after Fenton oxidation, the kinetics and process of the pyrolysis, morphologies and structures of the treated soil, as well as energy consumption and cost savings were comprehensively researched and analyzed. Through the Fenton oxidation–pyrolysis treatment, the macromolecules were effectively degraded and the contents of asphaltenes and resins were significantly reduced in the soil. Graphitized carbon was dominatingly existed after the pyrolysis. A 1.5 order reaction model was proposed to reasonably describe the pyrolysis remediation process of PCS. The Fenton oxidation–pyrolysis treatment can reduce energy consumption and cost compared with pyrolysis alone. This work not only offered an alternative approach of PCS remediation, but also provided theoretical guidance for practical soil remediation.

中文翻译：

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Fenton氧化热解修复石油污染土壤

石油污染土壤（PCS）对生态环境和人类健康构成威胁，亟待修复。在本研究中，采用芬顿氧化热解策略来实现有效的石油去除和 PCS 修复。 Fenton氧化2 h后总石油烃去除率最高可达99.6%，其中H2氧2/铁2+、6:1 和 pH 3，然后在 370°C 下热解。对芬顿氧化后土壤的有机组成、热解动力学和过程、处理后土壤的形态和结构以及能耗和成本节约等进行了全面的研究和分析。通过芬顿氧化热解处理，大分子物质得到有效降解，土壤中沥青质和树脂含量显着降低。热解后主要存在石墨化碳。提出了1.5级反应模型来合理描述PCS的热解修复过程。与单独热解相比，芬顿氧化-热解处理可以降低能耗和成本。该工作不仅为PCS修复提供了一种替代方法，而且为实际土壤修复提供了理论指导。