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首页> 外文期刊>Separation and Purification Technology >Interfacial catalytic oxidation for membrane fouling mitigation during algae-laden water filtration: Higher efficiency without algae integrity loss
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Interfacial catalytic oxidation for membrane fouling mitigation during algae-laden water filtration: Higher efficiency without algae integrity loss

机译：藻类水过滤期间膜污染膜污染的界面催化氧化：没有藻类完整性损失的更高效率

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摘要

Membrane fouling remains a significant issue in algae removal during membrane filtration. We constructed an interfacial catalytic oxidation membrane to mitigate membrane fouling caused by microalgae. Specifically, zero-valent iron (ZVI) nanoparticles (NPs) were immobilized on polycarbonate (PC) membrane to activate peroxymonosulfate (PMS). The activated PMS can oxidize extracellular organic matter (EOM) near the membrane surface and result in better filtration performance. The optimal ZVI NPs coated PC membrane with 0.1 mM PMS exhibited excellent anti-fouling property during the filtration of Chlorella v. suspension. The membrane performance can stay stable at least in five algae-laden water filtration cycles by regenerating ZVI NPs. Moreover, the interfacial oxidation only happened on the membrane surface, thereby minimizing algae cell breakage and associated disinfection by-products formation potential (DBPFP) in comparison with traditional in situ pre-oxidation. Indeed, no severe cell breakage was observed with the PMS dosages of less than 0.2 mM. The new interfacial catalytic oxidation strategy proposed here paves a sustainable way to the treatment of algae-laden water.
机译：膜污染仍然是藻类过滤期间藻类去除的重要问题。我们构建了一种界面催化氧化膜，以减轻微藻引起的膜污垢。具体地，将零价熨斗（ZVI）纳米颗粒（NPS）固定在聚碳酸酯（PC）膜上以活化过氧键硫酸盐（PMS）。活化的PM可以氧化膜表面附近的细胞外有机物质（EOM）并导致更好的过滤性能。最佳的ZVI NPS涂覆的PC膜，具有0.1mm PMS的滤波期间出现优异的抗污垢性能。悬浮液。通过再生ZVI NPS，膜性能至少可以保持在5个藻类过滤循环中的稳定性。此外，与传统原位预氧化相比，仅发生在膜表面上的界面氧化，从而最小化藻类细胞破裂和相关的消毒副产物形成电位（DBPFP）。实际上，没有小于0.2mm的PMS剂量没有观察到严重的细胞破裂。提出的新型界面催化氧化策略铺平了一种可持续的方式来治疗藻类水。

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