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首页> 外文期刊>Environmental Science and Pollution Research >Catalytic hydrodechlorination of monochloroacetic acid in wastewater using Ni-Fe bimetal prepared by ball milling
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Catalytic hydrodechlorination of monochloroacetic acid in wastewater using Ni-Fe bimetal prepared by ball milling

机译：球磨制备的镍铁双金属催化废水中一氯乙酸加氢脱氯

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摘要

Monochloroacetic acid (MCA) is a chemically stable and biologically toxic pollutant. It is often generated during the production of the pesticide dimethoate. Conventional wastewater treatment processes have difficulty degrading it. In this work, the dechlorination effects of Ni-Fe bimetal prepared using ball milling (BM) technology for the high concentrations of MCA in wastewater were examined. The MCA in aqueous solution was found to be degraded efficiently by the Ni-Fe bimetal. However, S-(methoxycarbonyl) methyl O, O-dimethyl phosphorodithioate (SMOPD) in wastewater, a by-product of the dimethoate production process, significantly inhibited the reductive dechlorination activity of Ni-Fe bimetal. Increasing the reaction temperature in the MCA wastewater enhanced the reduction activity of the Ni-Fe bimetal effectively. Oxygen was found to be unfavorable to dechlorination. Sealing the reaction to prevent oxidation was found to render the degradation process more efficient. The process retained over 88 % efficiency after 10 treatment cycles with 50 g/L of Ni-Fe bimetal under field conditions.
机译：一氯乙酸（MCA）是化学稳定且具有生物毒性的污染物。它通常在乐果农药生产过程中产生。传统的废水处理工艺很难降解。在这项工作中，研究了使用球磨（BM）技术制备的镍铁双金属对废水中高浓度MCA的脱氯作用。发现水溶液中的MCA被Ni-Fe双金属有效降解。但是，废水中的S-（甲氧羰基）甲基O，O-二甲基二硫代磷酸酯（SMOPD）是乐果生产过程的副产物，大大抑制了Ni-Fe双金属的还原脱氯活性。提高MCA废水中的反应温度可有效提高Ni-Fe双金属的还原活性。发现氧气不利于脱氯。发现密封反应以防止氧化使降解过程更有效。在现场条件下，使用50 g / L的Ni-Fe双金属处理10个处理周期后，该工艺保留了88％以上的效率。

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