Solar-driven thermo- and electrochemical degradation of nitrobenzene in wastewater: Adaptation and adoption of solar STEP concept
Solar-driven thermo- and electrochemical degradation of nitrobenzene in wastewater: Adaptation and adoption of solar STEP concept
复制标题
太阳能驱动的废水中硝基苯的热降解和电化学降解：太阳能 STEP 概念的适应和采用
DOI：
10.1016/j.jhazmat.2016.09.069
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发表时间：
2017-01-05
影响因子：
13.6
通讯作者：
Wang, Baohui
中科院分区：
文献类型：
--
作者：
Gu, Di;Shao, Nan;Wang, Baohui
STEP概念已经成功地证明了通过利用太阳能热和电来驱动化学反应，以最大限度地减少化石能源，同时最大限度地提高热力学和动力学中的热反应和电化学反应的速率。实验结果表明，STEP的概念是适应和采用有效的硝基苯降解的开拓性研究。通过理论计算和热依赖循环伏安法研究发现，随着温度的升高，硝基苯的降解电位明显降低，同时电流也大大提高。与传统的电化学方法相比，由于热效应和电化学效应的共同作用，以及硝基苯的间接电化学氧化向直接电化学氧化的转变，硝基苯的降解效率明显提高，降解速度加快。通过对HPLC、UV-vis和降解数据的分析，结合热化学和电化学对STEP降解硝基苯的机理进行了初步探讨。该理论和实验为利用太阳能高效、清洁、低碳地处理硝基苯废水提供了一个试点。(C)© 2016 Elsevier B. V.版权所有。
The STEP concept has successfully been demonstrated for driving chemical reaction by utilization of solar heat and electricity to minimize the fossil energy, meanwhile, maximize the rate of thermo- and electrochemical reactions in thermodynamics and kinetics. This pioneering investigation experimentally exhibit that the STEP concept is adapted and adopted efficiently for degradation of nitrobenzene. By employing the theoretical calculation and thermo-dependent cyclic voltammetry, the degradation potential of nitrobenzene was found to be decreased obviously, at the same time, with greatly lifting the current, while the temperature was increased. Compared with the conventional electrochemical methods, high efficiency and fast degradation rate were markedly displayed due to the co-action of thermo- and electrochemical effects and the switch of the indirect electrochemical oxidation to the direct one for oxidation of nitrobenzene. A clear conclusion on the mechanism of nitrobenzene degradation by the STEP can be schematically proposed and discussed by the combination of thermo- and electrochemistry based the analysis of the HPLC, UV-vis and degradation data. This theory and experiment provide a pilot for the treatment of nitrobenzene wastewater with high efficiency, clean operation and low carbon footprint, without any other input of energy and chemicals from solar energy. (C) 2016 Elsevier B.V. All rights reserved.