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Reactive, Self-Cleaning Ultrafiltration Membrane Functionalized with Iron Oxychloride Nanocatalysts
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2018-07-26 , DOI: 10.1021/acs.est.8b01916 Meng Sun 1 , Ines Zucker 1 , Douglas M. Davenport 1 , Xuechen Zhou 1 , Jiuhui Qu 2 , Menachem Elimelech 1
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2018-07-26 , DOI: 10.1021/acs.est.8b01916 Meng Sun 1 , Ines Zucker 1 , Douglas M. Davenport 1 , Xuechen Zhou 1 , Jiuhui Qu 2 , Menachem Elimelech 1
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Self-cleaning, antifouling ultrafiltration membranes are critically needed to mitigate organic fouling in water and wastewater treatment. In this study, we fabricated a novel polyvinylidene fluoride (PVDF) composite ultrafiltration membrane coated with FeOCl nanocatalysts (FeOCl/PVDF) via a facile, scalable thermal-treatment method, for the synergetic separation and degradation of organic pollutants. The structure, composition, and morphology of the FeOCl/PVDF membrane were extensively characterized. Results showed that the as-prepared FeOCl/PVDF membrane was uniformly covered with FeOCl nanoparticles with an average diameter of 1–5 nm, which greatly enhanced membrane hydrophilicity. The catalytic self-cleaning and antifouling properties of the FeOCl/PVDF membrane were evaluated in the presence of H2O2 at neutral pH. Using a facile H2O2 cleaning process, we showed that the FeOCl/PVDF membrane can achieve an excellent water flux recovery rate of ∼100%, following organic fouling with a model organic foulant (bovine serum albumin). Moreover, the in situ catalytic production of active hydroxyl radicals by the FeOCl/PVDF membrane was elucidated by electron spin resonance (ESR) and UV analysis. The catalytic performance of the FeOCl/PVDF membrane was further demonstrated by the complete degradation of bisphenol A when H2O2 was dosed in the feed solution at neutral pH. Our results demonstrate the promise of utilizing this novel membrane for the treatment of waters with complex organic pollutants.
中文翻译：
氧化铁纳米催化剂功能化的反应性，自清洁超滤膜
为了减轻水和废水处理中的有机污垢，迫切需要自清洁，防污的超滤膜。在这项研究中，我们通过一种简便，可扩展的热处理方法，制备了一种新型的涂有FeOCl纳米催化剂（FeOCl / PVDF）的聚偏二氟乙烯（PVDF）复合超滤膜，用于协同分离和降解有机污染物。FeOCl / PVDF膜的结构，组成和形态得到了广泛的表征。结果表明，所制备的FeOCl / PVDF膜被平均直径为1-5 nm的FeOCl纳米颗粒均匀覆盖，从而大大提高了膜的亲水性。在H 2 O存在下评估了FeOCl / PVDF膜的催化自清洁和防污性能2在中性pH下。使用简便的H 2 O 2清洗工艺，我们表明，在用模型有机污垢剂（牛血清白蛋白）进行有机污垢处理后，FeOCl / PVDF膜可实现约100％的优异水通量回收率。此外，通过电子自旋共振（ESR）和UV分析阐明了FeOCl / PVDF膜在原位催化生产活性羟基自由基。FeOCl / PVDF膜的催化性能通过在中性pH下将H 2 O 2注入进料溶液中时双酚A的完全降解得到进一步证明。我们的结果证明了利用这种新型膜处理具有复杂有机污染物的水的前景。
更新日期：2018-07-26
中文翻译：
氧化铁纳米催化剂功能化的反应性，自清洁超滤膜
为了减轻水和废水处理中的有机污垢，迫切需要自清洁，防污的超滤膜。在这项研究中，我们通过一种简便，可扩展的热处理方法，制备了一种新型的涂有FeOCl纳米催化剂（FeOCl / PVDF）的聚偏二氟乙烯（PVDF）复合超滤膜，用于协同分离和降解有机污染物。FeOCl / PVDF膜的结构，组成和形态得到了广泛的表征。结果表明，所制备的FeOCl / PVDF膜被平均直径为1-5 nm的FeOCl纳米颗粒均匀覆盖，从而大大提高了膜的亲水性。在H 2 O存在下评估了FeOCl / PVDF膜的催化自清洁和防污性能2在中性pH下。使用简便的H 2 O 2清洗工艺，我们表明，在用模型有机污垢剂（牛血清白蛋白）进行有机污垢处理后，FeOCl / PVDF膜可实现约100％的优异水通量回收率。此外，通过电子自旋共振（ESR）和UV分析阐明了FeOCl / PVDF膜在原位催化生产活性羟基自由基。FeOCl / PVDF膜的催化性能通过在中性pH下将H 2 O 2注入进料溶液中时双酚A的完全降解得到进一步证明。我们的结果证明了利用这种新型膜处理具有复杂有机污染物的水的前景。
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