改进Fenton氧化体系修复石油污染土壤的机理研究

项目名称： 改进Fenton氧化体系修复石油污染土壤的机理研究

项目编号： No.41271482

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 李方敏

作者单位： 长江大学

项目金额： 75万元

中文摘要： 传统的Fenton反应(Fe2+/H2O2)在pH为3的酸性条件下，产生具有强氧化力的羟基自由基，能有效地去除含油废水中的有机污染物，但在处理石油污染土壤时因反应速度过快、需定期补充Fe2+、控制pH值≤3等条件限制而影响其修复效果。本项目根据江汉油田石油污染土壤的理化性质及其污染程度，采用超声波振动、化学清洗剂等预处理方法，应用"双元平衡解吸(DED)模型"探讨从土壤胶体表面解吸石油烃类污染物的动力学过程；采用正交设计和裂区设计，探讨不同种类和浓度的氧化剂、催化剂及不同超声能量密度等处理对土壤中石油烃类污染物的去除效果，构建改进的Fenton氧化体系；以改进的Fenton氧化、超声-Fenton氧化等方法去除被解吸的石油污染物，并优化适宜于后续微生物修复的Fenton氧化条件，采用GC-MS、X射线衍射仪等多种手段检测降解中间产物及其土壤结构的变化，为石油污染土壤修复提供科学依据。

中文关键词： Fenton氧化；超声；石油污染土壤；去除率；表面活性剂

英文摘要： It has brought serious pollution to soil resource due to the crude oil leakage, oily wastewater and oily waste slurry in the process of petroleum drilling, mining, refining and storage. The chemical oxidation method is one of the effective practices remediating the petroleum-contaminated soils. The organic pollutants of oily wastewater can be removed effectively by using of the traditional Fenton reaction (Fe2+/H2O2),which result in hydroxyl radical of the strong oxidizing power under the acidic condition of pH 3, but there are some limitations, including excessive reaction rate, regular addition of Fe2+ and the requirement of the pH≤3, which affect seriously efficiency of remediation of petroleum contaminated soil. It is intended to on the basis of physical and chemical properties of petroleum contaminated soil and pollution status in Jianghan oil field, using of pretreatment method such as ultrasonic vibration, chemical cleaning agents, the dynamic process of petroleum contaminants desorbed from soil colloids will be discussed by adopting the dual-equilibrium desorption (DED) model in this project. Application of orthogonal design and split-plot design, effect of the different types and different concentrations of oxidants, catalysts and different ultrasonic energy densities and other factors on the removal of

英文关键词： Fenton oxidation；ultrasonic；petroleum contaminated soil；removal efficiency；surfactant