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首页> 外文期刊>Journal of Hazardous Materials >High-efficient treatment of wastewater contained the carcinogen naphthylamine by electrochemical oxidation with γ-Al_2O_3 supported MnO_2 and Sb-doped SnO_2 catalyst
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High-efficient treatment of wastewater contained the carcinogen naphthylamine by electrochemical oxidation with γ-Al_2O_3 supported MnO_2 and Sb-doped SnO_2 catalyst

机译：γ-Al_2O_3负载MnO_2和Sb掺杂SnO_2催化剂电化学氧化高效处理致癌萘胺废水。

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摘要

1-Naphthylamine wastewater causes severe environmental pollution because of its acute toxicity and carcinogenicity in humans, which makes it difficult to reuse by conventional technologies. In this study, we report an investigation of the electrochemical catalytic oxidation of 1-naphthylamine in synthetic wastewater in a 150mL electrolytic batch reactor with Ti/Sb-SnO_2/PbO_2 as anode and steel plate as cathode, where the reaction was assisted by MnCO_2 and Sn_(1-x)Sb_xO_2 composite materials as the catalyst and γ-Al_2O_3 as the carrier (MnCO_2 and Sn_(1-x)Sb_xO_2/γ-Al_2O_3) The catalyst was synthesized by impregnating process and was characterized by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The effects of pH and current density on the efficiency of the electrochemical degradation process were also studied. It was found that MnCO_2 and Sn_(1-x)Sb_xO_2/γ-Al_2O_3 exhibited excellent catalytic activity in the electrochemical degradation of 1-naphthylamine wastewater. The results showed that the refractory organics in wastewater can be effectively removed by this process, and a chemical oxygen demand (COD) removal efficiency of 92.2% was obtained in 20 min at pH 7.0 and current density was equal to 50 mA cm~(-2). According to the experimental results, a hypothetical mechanism of electrochemical catalytic degradation was also proposed.
机译：1-萘胺废水由于其对人类的急性毒性和致癌性而导致严重的环境污染，这使得传统技术难以重复利用。在这项研究中，我们报告了在150mL电解分批反应器（以Ti / Sb-SnO_2 / PbO_2为阳极，钢板为阴极）中合成废水中1-萘胺的电化学催化氧化的研究，该反应由MnCO_2和以Sn_（1-x）Sb_xO_2复合材料为催化剂，以γ-Al_2O_3为载体（MnCO_2和Sn_（1-x）Sb_xO_2 /γ-Al_2O_3），通过浸渍法合成并通过X射线衍射表征（ XRD）和X射线光电子能谱（XPS）。还研究了pH和电流密度对电化学降解过程效率的影响。结果表明，MnCO_2和Sn_（1-x）Sb_xO_2 /γ-Al_2O_3在1-萘胺废水的电化学降解中表现出优异的催化活性。结果表明，该工艺可以有效去除废水中的难降解有机物，在pH 7.0的条件下，在20 min内获得的化学需氧量（COD）去除率为92.2％，电流密度为50 mA cm〜（- 2）。根据实验结果，提出了电化学催化降解的假想机理。

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