摘要
为了有效降解含油污泥中的原油,在热活化的基础上考察不同活化方式对原油去除率的影响,并探究其活化机理。结果表明,与单一热活化相比,复合活化方式均可以提高过硫酸盐的氧化效果,其中Fe3O4的活化效果最佳,其原油的去除率为45.87%。通过进一步分析可知,活化过硫酸盐可产生硫酸根自由基(SO4^-·)和羟基自由基(·OH),这些强氧化性基团可以降解大部分石油类污染物。在此基础上测定了pH在实验过程中的变化,探究pH变化与降解机理的关系。目前,活化过硫酸盐氧化技术主要用于水和土壤方面的处理,对含油污泥的研究相对薄弱,因此活化过硫酸盐氧化法修复含油污泥具有良好的发展前景。
The treatment of oily sludge has always been a major issue for oilfields and refineries.In order to effectively degrade crude oil in oily sludge,this study examines the effects of different activation methods for persulfates on the removal rate of crude oil on the basis of thermal activation,and explores their activation mechanism.It is shown that compared with single thermal activation way,the composite activation method can improve the oxidation effect of persulfates.Among them,Fe3O4 has the best activation effect,over which the removal rate of crude oil can reach 45.87%.Further analysis shows that activated persulfate can generate sulfate radicals(SO4^-·)and hydroxyl radicals(·OH).These strong oxidizing groups can degrade most petroleum pollutants.Based on this,the changes of pH are measured during the experiment,and the relationship between pH change and degradation mechanism is explored.At present,the activated persulfates oxidation technology is mainly used in treatment of water and soil,and the research on its use in treating oily sludge is relatively weak.Therefore,the activated persulfate oxidation method has a good prospect for the remediation of oily sludge.
作者
张琦
王静贤
于鸽方
薛建良
肖新峰
ZHANG Qi;WANG Jing-xian;YU Ge-fang;XUE Jian-liang;XIAO Xin-feng(College of Chemical and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266590,China;School of Environment Science and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,China;Qingdao Municipal Bureau of Ecology and Environment,Qingdao 266200,China)
出处
《现代化工》
CAS
CSCD
北大核心
2020年第10期120-123,130,共5页
Modern Chemical Industry
基金
国家自然科学基金(51408347)。
