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    Oil-in-water separation with graphene-based nanocomposite membranes for produced water treatment

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    Type
    Article
    Authors
    Alammar, Abdulaziz
    Park, Sang-Hee
    Williams, Craig J.
    Derby, Brian
    Szekely, Gyorgy cc
    KAUST Department
    Advanced Membranes & Porous Materials Center, Physical Science Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
    Advanced Membranes and Porous Materials Research Center
    Chemical Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2020-03-09
    Online Publication Date
    2020-03-09
    Print Publication Date
    2020-05
    Embargo End Date
    2022-03-09
    Submitted Date
    2019-11-04
    Permanent link to this record
    http://hdl.handle.net/10754/662093
    
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    Abstract
    The treatment of wastewater from the oil and gas industry presents a very specific problem because the wastewater produced is comprised of a complex mixture of oil and water that can be difficult to treat. In this work, polybenzimidazole (PBI), graphene oxide (GO) and reduced GO (rGO) nanocomposite membranes were developed via the common blade coating and phase inversion technique for the treatment of produced water from the oil and gas industry. The nanocomposite membranes were dip-coated by polydopamine (PDA), which is known for its antifouling properties. For the industrially relevant produced water, stable emulsions with high salinity, sharp unimodal size distribution and average oil droplet size of less than 500 nm were prepared. The incorporation of just a few weight percent GO into the PBI matrix resulted in superior oil-removal efficiency up to 99.9%, while maintaining permeance as high as 91.3±3.4 L m-2 h-1 bar-1. The presence of GO also increased the mechanical stability of the membrane. The biofouling test of the nanocomposite membrane over 180 days showed remarkable improvement compared to the pristine PBI membrane. The nanocomposite membranes described in this work demonstrated promising long-term performance for oil-in-water emulsion separation as well as antifouling and antimicrobial properties without any alkaline or acidic cleaning. The membranes were capable of de-oiling high salinity emulsions with excellent reusability, highlighting that these membranes are promising for produced water treatment under harsh industrial conditions.
    Citation
    Alammar, A., Park, S.-H., Williams, C. J., Derby, B., & Szekely, G. (2020). Oil-in-water separation with graphene-based nanocomposite membranes for produced water treatment. Journal of Membrane Science, 118007. doi:10.1016/j.memsci.2020.118007
    Sponsors
    The graphical abstract, Figures 1 and 2 were created by Heno Hwang, scientific illustrator at King Abdullah University of Science and Technology (KAUST). The authors would also like to thank Rachid Sougrat (KAUST) and Hai Anh Le Phuong (University of Manchester) for their assistance with the TEM and AFM measurements, respectively. The PhD scholarship from Saudi Aramco is gratefully acknowledged (AA). The authors wish to acknowledge the support provided by the Henry Royce Institute in the use of the nanoindentation equipment (Grant ref EP/R010145/1).
    Publisher
    Elsevier BV
    Journal
    Journal of Membrane Science
    DOI
    10.1016/j.memsci.2020.118007
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S037673882030586X
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.memsci.2020.118007
    Scopus Count
    Collections
    Articles; Advanced Membranes and Porous Materials Research Center; Physical Science and Engineering (PSE) Division; Chemical Engineering Program

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