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首页> 外文期刊>RSC Advances >A reactive electrochemical filter system with an excellent penetration flux porous Ti/SnO2–Sb filter for efficient contaminant removal from water
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A reactive electrochemical filter system with an excellent penetration flux porous Ti/SnO2–Sb filter for efficient contaminant removal from water

机译：反应性电化学过滤器系统具有出色的渗透通量多孔Ti / SnO2-Sb过滤器，可有效去除水中的污染物

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Tubular porous Ti/SnO _(2) –Sb filters with excellent penetration flux (～61.94 m ~(3) m ~(?2) h ~(?1) bar ~(?1) ) and electrochemical activity were prepared by a sol–gel method using low-cost porous titanium filters as the substrates. The porous Ti/SnO _(2) –Sb filters were used as anodic reactive electrochemical membranes to develop reactive electrochemical filter systems, by combining membrane filtration technology with the electrooxidation process, for water treatment. A convection-enhanced rate constant of 4.35 × 10 ~(?4) m s ~(?1) was achieved for Fe(CN) _(6) ~(4?) oxidation, which approached the kinetic limit and is the highest reported in an electrochemical system. The electrooxidative performance of the reactive electrochemical filter system was evaluated with 50 mg L ~(?1) rhodamine B (RhB). The results showed that the reactive electrochemical filter system in flow-through mode resulted in an 8.6-fold enhancement in RhB oxidation as compared to those in flow-by mode under the same experimental conditions. A normalized rate constant of 5.76 × 10 ~(?4) m s ~(?1) for RhB oxidation was observed at an anode potential of 3.04 V vs. SCE, which is much higher than that observed in a reactive electrochemical filter system with carbon nanotubes and/or Ti _(4) O _(7) (1.7 × 10 ~(?5) –1.4 × 10 ~(?4) m s ~(?1) ). The electrical energy per order degradation (EE/O) for RhB was as low as 0.28 kW h m ~(?3) in flow-through mode, with a relatively short residence time of 9.8 min. The overall mineralization current efficiency (MCE) was calculated to be 83.6% with ～99% RhB removal and ～51% TOC removal. These results illustrate that this reactive electrochemical filter system is expected to be a promising method for water treatment.
机译：制备具有良好渗透通量（〜61.94 m〜（3）m〜（？2）h〜（？1）bar〜（？1）的管状多孔Ti / SnO _（2）–Sb过滤器，并通过以下方法制备溶胶-凝胶法，使用低成本的多孔钛过滤器作为基材。多孔Ti / SnO _（2）–Sb过滤器用作阳极反应性电化学膜，通过将膜过滤技术与电氧化工艺相结合，开发出用于水处理的反应性电化学过滤器系统。 Fe（CN）_（6）〜（4？）氧化时，对流增强速率常数为4.35×10〜（？4）ms〜（？1），已接近动力学极限，是报道的最高值。电化学系统。用50 mg L〜（？1）罗丹明B（RhB）评价反应性电化学过滤器系统的电氧化性能。结果表明，在相同的实验条件下，与流通模式相比，流通模式的反应式电化学过滤器系统的RhB氧化增强了8.6倍。在3.04 V vs. SCE的阳极电势下，RhB氧化的归一化速率常数为5.76×10〜（？4）ms〜（？1），远高于含碳的反应性电化学过滤系统中观察到的速率常数。纳米管和/或Ti _（4）O _（7）（1.7×10〜（？5）–1.4×10〜（？4）ms〜（？1））。在流通模式下，RhB的每级降解电能（EE / O）低至0.28 kW h m〜（？3），相对较短的停留时间为9.8分钟。计算总矿化电流效率（MCE）为83.6％，RhB去除率为〜99％，TOC去除率为〜51％。这些结果表明，该反应性电化学过滤器系统有望成为一种有前途的水处理方法。

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