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首页> 外文期刊>International Journal of Electrochemical Science >Mediated Electrochemical Oxidation of Pollutants in Crude Oil Desalter Effluent
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Mediated Electrochemical Oxidation of Pollutants in Crude Oil Desalter Effluent

机译：原油淡化废水中污染物的介导电化学氧化

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Wastewater samples from a crude oil desalting process were subjected to extensive physicochemical characterization and electrolysis to evaluate the two main reaction pathways, electrochemical incineration and mediated oxidation, that occur during an electrochemical oxidation process (EOP) with a boron-doped diamond (BDD) anode. The effects of the main operating variables (pH, current density, and ionic composition) on the oxidation of organic pollutants and the production of hydroxyl radicals (●OH) were evaluated via spectroelectrochemistry, quantification of the total organic carbon (TOC), and fluorescence spectroscopy. The predominance of each reaction pathway was evaluated using tert-butyl alcohol (50 mM) as a ●OH scavenger, the main oxidant species in electrochemical incineration. The results indicated that the action of ●OH was minimal compared to that of active - ● ● ● ● chlorine species (ClO , HClO, and Cl2), oxychlorine radicals (ClO , ClO2 , Cl , and HOCl ), and ●- ●- oxychlorine anion radicals (Cl2 , and HOCl ). Under the optimal operating conditions (pH 8.5, j = -2 100 mA cm , and tr = 3 h), a 98.2% mineralization rate in terms of TOC was achieved. Mediated electrochemical oxidation was the predominant reaction pathway and was thus responsible for the high degradation efficiency obtained.
机译：对原油脱盐过程中的废水样品进行了广泛的物理化学表征和电解，以评估在掺杂硼的金刚石（BDD）阳极的电化学氧化过程（EOP）期间发生的两个主要反应途径，即电化学焚化和介导的氧化。 。通过光谱电化学，总有机碳（TOC）定量和荧光评估了主要操作变量（pH，电流密度和离子组成）对有机污染物氧化和羟基自由基（●OH）产生的影响。光谱学。使用叔丁醇（50 mM）作为●OH清除剂（电化学焚烧中的主要氧化剂），评估了每个反应路径的优势。结果表明，●OH的作用相比于活性物质-●●●●氯（ClO，HClO和Cl2），氯氧自由基（ClO，ClO2，Cl和HOCl）和●-●-氯离子阴离子自由基（Cl2和HOCl）。在最佳操作条件下（pH 8.5，j = -2 100 mA cm，tr = 3 h），以TOC计，矿化率达到98.2％。介导的电化学氧化是主要的反应途径，因此负责获得高降解效率。

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