SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2021, Vol. 34 ›› Issue (6): 53-60.DOI: 10.1016/j.cjche.2020.08.001

• Separation Science and Engineering • 上一篇    下一篇

Characterization of oil component and solid particle of oily sludge treated by surfactant-assisted ultrasonication

Zuhong Lin1, Fushuai Xu1, Lili Wang2, Liyang Hu1, Lingfu Zhu1, Jie Tan1, Zhifeng Li1, Tingting Zhang1   

  1. 1 Department of Environmental Science and Engineering, Research Centre for Resource and Environment, Beijing University of Chemical Technology, Beijing 100029, China;
    2 Sinopec Petroleum Exploration Research Institute, Beijing 100083, China
  • 收稿日期:2020-04-13 修回日期:2020-07-19 出版日期:2021-06-28 发布日期:2021-08-30
  • 通讯作者: Tingting Zhang
  • 基金资助:
    The authors acknowledge the financial support from the National Natural Science Foundation of China (Nos. 41977142 and 41807133), the special fund of State Key Joint Laboratory of Environment Simulation and Pollution Control (No. 18K05ESPCT).

Characterization of oil component and solid particle of oily sludge treated by surfactant-assisted ultrasonication

Zuhong Lin1, Fushuai Xu1, Lili Wang2, Liyang Hu1, Lingfu Zhu1, Jie Tan1, Zhifeng Li1, Tingting Zhang1   

  1. 1 Department of Environmental Science and Engineering, Research Centre for Resource and Environment, Beijing University of Chemical Technology, Beijing 100029, China;
    2 Sinopec Petroleum Exploration Research Institute, Beijing 100083, China
  • Received:2020-04-13 Revised:2020-07-19 Online:2021-06-28 Published:2021-08-30
  • Contact: Tingting Zhang
  • Supported by:
    The authors acknowledge the financial support from the National Natural Science Foundation of China (Nos. 41977142 and 41807133), the special fund of State Key Joint Laboratory of Environment Simulation and Pollution Control (No. 18K05ESPCT).

摘要: The ultrasonic technique has been demonstrated to be a promising method for the disposal of hazardous oily sludge. However, the separation of oil from the surfaces of the solid particles is still difficult due to the strong interaction between the oil and solid particle. In this study, three types of surfactants were used to assist the ultrasonic treatment of oily sludge. The oil component, surface composition, and structure of the solid particle were determined. The results showed that different surfactants had different oil removal abilities. In the three surfactant-assisted sonication systems, the oil removal rate increased during the starting reaction period and then decreased with longer sonication time. The results of four components analysis suggested that surfactant easy to be ionized in water posed a better removal effect on resins, while the amphiphilic surfactant preferred saturates, aromatics and asphaltenes. The morphology analysis indicated that particle size was shattered into smaller ones by the ultrasonic process, and the wettability of the solid surface also changed during this treatment. The characterization of the oil component and solid particle during surfactant-assisted ultrasonication treatment will help to better understand the separation of oil from oily sludge and improve the oil recovery efficiency from oily sludge.

关键词: Oily sludge, Surface, Morphology, Ultrasonic treatment, Surfactants

Abstract: The ultrasonic technique has been demonstrated to be a promising method for the disposal of hazardous oily sludge. However, the separation of oil from the surfaces of the solid particles is still difficult due to the strong interaction between the oil and solid particle. In this study, three types of surfactants were used to assist the ultrasonic treatment of oily sludge. The oil component, surface composition, and structure of the solid particle were determined. The results showed that different surfactants had different oil removal abilities. In the three surfactant-assisted sonication systems, the oil removal rate increased during the starting reaction period and then decreased with longer sonication time. The results of four components analysis suggested that surfactant easy to be ionized in water posed a better removal effect on resins, while the amphiphilic surfactant preferred saturates, aromatics and asphaltenes. The morphology analysis indicated that particle size was shattered into smaller ones by the ultrasonic process, and the wettability of the solid surface also changed during this treatment. The characterization of the oil component and solid particle during surfactant-assisted ultrasonication treatment will help to better understand the separation of oil from oily sludge and improve the oil recovery efficiency from oily sludge.

Key words: Oily sludge, Surface, Morphology, Ultrasonic treatment, Surfactants