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用于阳极钝化膜之外的完全矿化的太阳能热耦合电化学氧化废水中的苯胺

Solar Thermo-coupled Electrochemical Oxidation of Aniline in Wastewater for the Complete Mineralization Beyond an Anodic Passivation Film.

作者信息

Yuan Dandan, Tian Lei, Li Zhida, Jiang Hong, Yan Chao, Dong Jing, Wu Hongjun, Wang Baohui

机构信息

Institute of New Energy Chemistry and Environmental Science, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing, 163318, P.R. China.

出版信息

Sci Rep. 2018 Feb 15;8(1):3103. doi: 10.1038/s41598-018-21473-z.

DOI:10.1038/s41598-018-21473-z
PMID:29449601
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5814425/
Abstract

Herein, we report the solar thermal electrochemical process (STEP) aniline oxidation in wastewater for totally solving the two key obstacles of the huge energy consumption and passivation film in the electrochemical treatment. The process, fully driven by solar energy without input of any other energies, sustainably serves as an efficient thermoelectrochemical oxidation of aniline by the control of the thermochemical and electrochemical coordination. The thermocoupled electrochemical oxidation of aniline achieved a fast rate and high efficiency for the full minimization of aniline to CO with the stability of the electrode and without formation of polyaniline (PAN) passivation film. A clear mechanism of aniline oxidation indicated a switching of the reactive pathway by the STEP process. Due to the coupling of solar thermochemistry and electrochemistry, the electrochemical current remained stable, significantly improving the oxidation efficiency and mineralization rate by apparently decreasing the electrolytic potential when applied with high temperature. The oxidation rate of aniline and chemical oxygen demand (COD) removal rate could be lifted up to 2.03 and 2.47 times magnification compared to conventional electrolysis, respectively. We demonstrate that solar-driven STEP processes are capable of completely mineralizing aniline with high utilization of solar energy. STEP aniline oxidation can be utilized as a green, sustainable water treatment.

摘要

在此，我们报道了用于完全解决电化学处理中巨大能耗和钝化膜这两个关键障碍的太阳能热电化学过程（STEP）对废水中苯胺的氧化。该过程完全由太阳能驱动，无需输入任何其他能量，通过控制热化学和电化学的协同作用，可持续地作为一种高效的苯胺热电化学氧化过程。苯胺的热耦合电化学氧化实现了快速且高效的将苯胺完全转化为CO，电极具有稳定性且不会形成聚苯胺（PAN）钝化膜。苯胺氧化的清晰机制表明了STEP过程中反应途径的转变。由于太阳能热化学和电化学的耦合，电化学电流保持稳定，通过在高温下应用时显著降低电解电位，从而明显提高了氧化效率和矿化速率。与传统电解相比，苯胺的氧化速率和化学需氧量（COD）去除率分别提高到2.03倍和2.47倍。我们证明了太阳能驱动的STEP过程能够以高太阳能利用率将苯胺完全矿化。STEP苯胺氧化可作为一种绿色、可持续的水处理方法。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2124/5814425/480b6c444ecf/41598_2018_21473_Fig14_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2124/5814425/480b6c444ecf/41598_2018_21473_Fig14_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2124/5814425/703409eecbad/41598_2018_21473_Fig1_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2124/5814425/8c718001c84f/41598_2018_21473_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2124/5814425/6d63e578496f/41598_2018_21473_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2124/5814425/6f6d47c0c7e0/41598_2018_21473_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2124/5814425/e3ec761299e1/41598_2018_21473_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2124/5814425/49647d1f1bbc/41598_2018_21473_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2124/5814425/39470a915ef5/41598_2018_21473_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2124/5814425/2f339a98fa6c/41598_2018_21473_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2124/5814425/27049cb65f85/41598_2018_21473_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2124/5814425/d04ff2339d84/41598_2018_21473_Fig13_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2124/5814425/480b6c444ecf/41598_2018_21473_Fig14_HTML.jpg

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