Contact
    Start Publications Membrane Distillation of Saline Water Contaminated with Oil and ...
    ←  Publication Finder
    Attension

    Membrane Distillation of Saline Water Contaminated with Oil and Surfactants

    Year: 2021

    Journal: Membranes, Volume 11, DEC

    Authors: Tomczak, Wirginia; Gryta, Marek

    Organizations: National Science Centre, Poland [2018/29/B/ST8/00942]

    Keywords: direct contact membrane distillation; oily wastewater; polypropylene membrane; sea water; scaling; surfactant; wetting

    Application of the membrane distillation (MD) process for the treatment of high-salinity solutions contaminated with oil and surfactants represents an interesting area of research. Therefore, the aim of this study is to investigate the effect of low-concentration surfactants in oil-contaminated high-salinity solutions on the MD process efficiency. For this purpose, hydrophobic capillary polypropylene (PP) membranes were tested during the long-term MD studies. Baltic Sea water and concentrated NaCl solutions were used as a feed. The feed water was contaminated with oil collected from bilge water and sodium dodecyl sulphate (SDS). It has been demonstrated that PP membranes were non-wetted during the separation of pure NaCl solutions over 960 h of the module exploitation. The presence of oil (100-150 mg/L) in concentrated NaCl solutions caused the adsorption of oil on the membranes surface and a decrease in the permeate flux of 30%. In turn, the presence of SDS (1.5-2.5 mg/L) in the oil-contaminated high-salinity solutions slightly accelerated the phenomenon of membrane wetting. The partial pores' wetting accelerated the internal scaling and affected degradation of the membrane's structure. Undoubtedly, the results obtained in the present study may have important implications for understanding the effect of low-concentration SDS on MD process efficiency.
    View publication