Crude oil spill accidents that have been occurring frequently not only have been seriously destroying the marine ecological environment and threatening human health for a long time, but also generating a great loss of precious resources. Therefore, the treatment of crude oil wastewater, especially under corrosive conditions, is one of the most urgent problems. However, to the best of our knowledge, the effective separation of surfactant-stabilized micro-nanoscale crude oil-in-water emulsions under corrosive conditions has been rarely reported. Herein, waste bricks are employed to effectively separate the surfactant-stabilized micro-nanoscale crude oil-in-water emulsions under corrosive conditions, which not only enables the removal of crude oil, but also reduces environmental pollution. The suspensions of waste brick powders (WBP) and sodium alginate were coated onto a polyvinylidene fluoride (PVDF) membrane via a vacuum filtration approach to prepare a WBP-coated membrane. The as-prepared WBP-coated membrane exhibited excellent underwater superoleophobicity under corrosive conditions and low adhesion to crude oil. Besides, the WBP-coated membrane can separate crude oil-in-water emulsions with a separation efficiency of up to 99.8% and a permeating flux as high as 623 L m⁻² h⁻¹. More significantly, the as-prepared WBP-coated membrane can successfully separate crude oil-in-water emulsions under corrosive aqueous conditions (1 M HCl, 1 M NaOH and 3.5 wt% NaCl solution) with a separation efficiency of above 99.5% and a permeating flux of up to 934 L m⁻² h⁻¹. The WBP-coated membrane not only removes crude oil from oily wastewater, but also enables the recycling of waste resources.

中文翻译：

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通过在腐蚀条件下使用砖厚的废粉膜有效分离表面活性剂稳定的水包油原油乳液

经常发生的原油泄漏事故不仅严重破坏了海洋生态环境，长期威胁着人类健康，而且还造成了宝贵资源的巨大损失。因此，特别是在腐蚀性条件下处理原油废水是最紧迫的问题之一。然而，就我们所知，在腐蚀条件下有效分离表面活性剂稳定的微纳米级水包油原油乳液的报道很少。此处，废砖用于在腐蚀条件下有效地分离表面活性剂稳定的微纳米级水包油原油乳液，这不仅能够去除原油，而且减少了环境污染。通过真空过滤方法来制备WBP涂覆的膜。所制备的WBP涂层膜在腐蚀性条件下表现出优异的水下超疏油性，并且对原油的附着力低。此外，涂覆有WBP的膜可以分离水包油原油乳液，分离效率高达99.8％，渗透通量高达623 L m ^-2 h ^-1。更重要的是，所制备的WBP涂层膜可以在腐蚀性水性条件（1 M HCl，1 M NaOH和3.5 wt％NaCl溶液）下成功分离水包原油乳液，分离效率高于99.5％，并且渗透通量高达934 L m ^-2 h ^-1。WBP涂层膜不仅可以从含油废水中去除原油，还可以回收利用废物资源。