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首页> 外文期刊>Separation and Purification Technology >Regeneration of spent carbon nanotube by electrokinetic process with binary metallic oxide electrodes of MnO2/Ti RuO2/Ti, and PbO2/Ti
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Regeneration of spent carbon nanotube by electrokinetic process with binary metallic oxide electrodes of MnO2/Ti RuO2/Ti, and PbO2/Ti

机译：MnO2 / Ti RuO2 / Ti和PbO2 / Ti的二元金属氧化物电极通过电动过程再生废碳纳米管

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This study was aimed to investigate the regeneration performance of carbon nanotube saturated with 150mg L~(-1) of nonylphenol (NP) by electrokinetic process with binary oxide electrodes (BMOEEK) under potential gradient of 2 V cm~(-1) and elapsed time of 8 h. Twenty experiments were conducted with four processing fluids of de-ionized water (DW), 0.06 M citric acid (CA), 0.2 M NaOH, and 0.1 M NaCl in a Pyrex glass cylindrical cell (4.2 cm in diameter x 12 cm in length). Two inert electrodes of carbon (C) and titanium (Ti) and three binary metallic electrodes of MnO2/Ti, RuO2/Ti, and PbO2/Ti were investigated in this study. Results were shown that higher EO permeability (3.8 x 10~(-6) to 10.0 x 10~(-6) cm~2 V~(-1) s~(-1)) was found in citric acid, NaOH, and NaCl systems than in DJ water system (0.6 x 10~(-6) to 2.5 x 10~(-6) cm~2 V~(-1) s~(-1)). The regeneration efficiency of CNT was 16.5-29.5%, 27.3-49.2%, 30.8-54.8% and 38.4-69.0% in BMOEEK-DW, -CA, -NaOH, and -NaCl systems, respectively. This might largely be because both OCl- and OH-radical were contributing for NP degradation in BMOEEK-NaCl system and, however, OH radical was the only contributor in other systems. Among the investigated electrodes, the RuO2/Ti electrode has shown the best degradation performance of NP. Results of this study concluded that NP was degraded by BMOEEK system, which was highly related to both processing fluid and binary metallic electrode, rather than removal only by conventional EK system. The innovative BMOEEK technology was promoted to be a sustainable technology.
机译：本研究旨在研究在150 V L〜（-1）壬基酚（NP）饱和的碳纳米管在2 V cm〜（-1）的电位梯度下通过电动过程与二元氧化物电极（BMOEEK）的再生性能时间8小时。在Pyrex玻璃圆柱试管（直径4.2厘米x长度12厘米）中，用四种去离子水（DW），0.06 M柠檬酸（CA），0.2 M NaOH和0.1 M NaCl的四种加工液进行了20个实验。 。本研究研究了碳（C）和钛（Ti）的两个惰性电极以及MnO2 / Ti，RuO2 / Ti和PbO2 / Ti的三个二元金属电极。结果表明，在柠檬酸，NaOH和NaCl中发现了较高的EO渗透性（3.8 x 10〜（-6）至10.0 x 10〜（-6）cm〜2 V〜（-1）s〜（-1））。 NaCl系统比DJ水系统中的（0.6 x 10〜（-6）至2.5 x 10〜（-6）cm〜2 V〜（-1）s〜（-1））。在BMOEEK-DW，-CA，-NaOH和-NaCl系统中，CNT的再生效率分别为16.5-29.5％，27.3-49.2％，30.8-54.8％和38.4-69.0％。这可能主要是因为OCl自由基和OH自由基都对BMOEEK-NaCl系统中的NP降解有贡献，而OH自由基是其他系统中的唯一贡献者。在研究的电极中，RuO2 / Ti电极表现出最好的NP降解性能。这项研究的结果得出结论，NP被BMOEEK系统降解，这与加工液和二元金属电极高度相关，而不是仅由常规EK系统去除。创新的BMOEEK技术被推广为可持续技术。

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