Abstract

Electrochemical oxidation (ECO) of oxalate ions in aqueous solutions has been studied with the use of an MB–11T-06 electrochemical unit element. It was shown that the ECO occurs most effectively in weakly-acid media at anode current density not exceeding 160 A/m². The presence of chloride ions in a solution being treated in neutral or weakly acid media leads to an increase in the electrochemical destruction rate of oxalate ions. Sulfate and borate ions make lower the efficiency of ECO in the whole H range under study (3–10). It is shown that performing a preliminary electrochemical oxidation of an oxalate-containing solution makes it possible to make 4 times larger the ⁹⁰Sr distribution coefficient on a NaA synthetic zeolite.

中文翻译：

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水溶液中草酸根离子的电化学氧化

摘要

已经使用 MB-11T-06 电化学单元元件研究了水溶液中草酸根离子的电化学氧化 (ECO)。结果表明，在阳极电流密度不超过 160 A/m ^{2 的}弱酸性介质中，ECO 最有效。在中性或弱酸性介质中处理的溶液中存在氯离子会导致草酸盐离子的电化学破坏率增加。在所研究的整个 H 范围内，硫酸盐和硼酸盐离子会降低 ECO 的效率 (3-10)。结果表明，对含草酸盐的溶液进行初步电化学氧化可以使NaA 合成沸石上的⁹⁰ Sr 分配系数增加 4 倍。