College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Ministry of Education Key Laboratory of Yangtze River Water Environment, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, China.
College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Ministry of Education Key Laboratory of Yangtze River Water Environment, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, China.
J Hazard Mater. 2021 Aug 5;415:125624. doi: 10.1016/j.jhazmat.2021.125624. Epub 2021 Mar 10.
Oily sludge is widely produced in the processes of petroleum exploitation, storage, transportation, and refining, and becomes more stable during aging. The interfacial stability of aging oily sludge hinders the recovery and disposal of oil resources. This review summarizes the interfacial film stability of aging oily sludge, which occurs through the formation of viscoelastic and rigid bilayer interfacial films between heavy components (asphaltenes and resins) and inorganic particles. The bilayer interfacial films enhance interfacial film strength and hinder the aggregation of droplets, contributing to the formation of a stable and high-viscosity oil-water-solid three-phase mixture. Recent demulsification technologies for reducing the stability of interfacial films have been classified as follows: removing heavy components, changing asphaltene aggregate structure, and reducing inorganic particle content. More efficient demulsification technologies are expected to be developed by deeply analyzing the microstructure and interfacial properties of asphaltenes and resins, as well as comprehensively studying the complex interactions among various components. This review constructs a bridge between the stability mechanism and the corresponding destabilization methods, which would promote future studies in aging oily sludge treatment.
含油污泥广泛产生于石油开采、储存、运输和精炼过程中，并在老化过程中变得更加稳定。老化含油污泥的界面稳定性阻碍了油资源的回收和处置。本综述总结了老化含油污泥的界面膜稳定性，这是通过重质成分（沥青质和树脂）和无机颗粒之间形成粘弹性和刚性双层界面膜而发生的。双层界面膜增强了界面膜强度，并阻碍了液滴的聚集，有助于形成稳定的高粘度油水固三相混合物。最近用于降低界面膜稳定性的破乳技术已被分类如下：去除重质成分、改变沥青质聚集体结构和降低无机颗粒含量。通过深入分析沥青质和树脂的微观结构和界面性质，以及综合研究各种成分之间的复杂相互作用，有望开发出更有效的破乳技术。本综述在稳定性机制和相应的去稳定化方法之间架起了桥梁，将促进未来老化含油污泥处理的研究。
