Effects of Hydrogen Peroxide and Sodium Hypochlorite Aging on Properties and Performance of Polyethersulfone Ultrafiltration Membrane
Effects of Hydrogen Peroxide and Sodium Hypochlorite Aging on Properties and Performance of Polyethersulfone Ultrafiltration Membrane
复制标题
过氧化氢和次氯酸钠老化对聚醚砜超滤膜性能的影响
DOI：
10.3390/ijerph16203972
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发表时间：
2019-10-01
影响因子：
--
通讯作者：
Huang, Tinglin
中科院分区：
文献类型：
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作者：
Li, Kai;Li, Shu;Huang, Tinglin
主要聚合物和添加剂与氧化清洗剂的化学反应在水和废水处理聚合物膜的老化中起着重要作用。过氧化氢（H2O2）作为一种绿色、强效氧化剂，在碱性条件下可以达到良好的清洗效果，但其对膜老化的影响却知之甚少。本研究通过腐殖酸（HA）过滤实验和多种膜表征技术全面研究了碱性条件（pH 9和11）下H2O2暴露引起的聚醚砜（PES）膜的降解，并以次氯酸钠（NaClO）老化检查作为比较。在500 g·h/L的暴露剂量下，H2O2老化几乎没有改变膜的渗透性和HA保留率，而NaClO老化导致膜渗透性大幅增加和保留能力显着下降。同时，H2O2老化略微增加了HA过滤的结垢倾向，而NaClO老化导致更严重的结垢。 ATR-FTIR 和 XPS 分析表明，H2O2 对 PES 和亲水添加剂的降解比 NaClO 的降解要少得多，并且对膜形态和表面性质进行了表征，以解释过滤性能的变化。总体而言，与使用 NaClO 清洗相比，使用 H2O2 清洗可以最大程度地减少膜降解。
Chemical reaction of main polymer and additive with oxidative cleaning agents plays an important role in aging of polymeric membrane for water and wastewater treatment. As a green and powerful oxidant, hydrogen peroxide (H2O2) can achieve good cleaning efficacy under alkaline condition, but its influence on membrane aging was poorly understood. In this study, degradation of polyethersulfone (PES) membrane due to H2O2 exposure under alkaline condition (pH 9 and 11) was holistically investigated by humic acid (HA) filtration experiments and multiple membrane characterization techniques, with sodium hypochlorite (NaClO) aging examined as a comparison. Membrane permeability and HA retention rate was hardly changed by H2O2 aging at an exposure dose of 500 g·h/L, whereas NaClO aging led to substantial increase of membrane permeability and significant decrease of retention ability. Meanwhile, H2O2 aging slightly increased fouling propensity with HA filtration, while NaClO aging resulted in more serious fouling. ATR-FTIR and XPS analysis revealed much less degradation of PES and hydrophilic additive by H2O2 than that by NaClO, and membrane morphology and surface properties were characterized to explain the variation of filtration performance. Overall, compared with cleaning with NaClO, membrane degradation can be minimized by cleaning with H2O2.