Fenton氧化法修复石油污染土壤的研究进展

Remediation of petroleum contaminated soil by Fenton oxidation method: A review

传统的Fenton氧化法(Fe2+/H2O2)因反应速度过快、需要定期补充Fe2+、控制pH值≤3等方面的限制而影响到石油烃类污染土壤的修复效果.本文综述了近年来Fenton反应中氧化剂、催化剂的改进及其对土壤中石油污染物的去除效率,揭示了土壤性质、反应条件、污染物结构及非均相催化剂比表面积等因素对去除效率的影响,介绍了超声波前置处理后,Fenton试剂与土壤上解吸的石油污染物接触几率的增加及石油烃类可生物降解性的提高,促进了微生物的后续处理效果,并对该领域的研究趋势进行了展望.

The traditional Fenton oxidation （Fe2＋/H2 02 ） reaction has some drawbacks when used for sml remediation, including rapid reaction rate, regular additions of Fe2＋ and the requirement of low pH 〈3, which limited its remediation efficiency for petroleum hydrocarbons contaminated soil. In this paper, recent progress on modified oxidants and catalysts of the Fenton reaction, and effects of the modification on removal efficiencies in petroleum-contaminated soils were reviewed. Soil properties, reaction conditions, pollutant structure and the heterogeneous catalyst specific surface areas were major factors influencing the removal efficiencies. The method of ultrasonic pre-treatment was introduced, which increases the contact probability of Fenton reagent with the petroleum contaminants petroleum hydrocarbon pollutants by the subsequent also prospected. desorbed from soils, and it improves biodegradability of microbial processes. The research trends in this field were