在 DSA®-Cl 上甲醇介质中四环素的电氧化。
Electro-oxidation of tetracycline in methanol media on DSA®-Cl.
机构信息
São Carlos Institute of Chemistry, University of São Paulo, P.O. Box 780, CEP 13560-970, São Carlos, SP, Brazil.
Department of Chemical Engineering, Faculty of Chemical Sciences & Technologies, Universidad de Castilla - La Mancha, Campus Universitario S/n, 13071, Ciudad Real, Spain.
出版信息
Chemosphere. 2021 Jun;273:129696. doi: 10.1016/j.chemosphere.2021.129696. Epub 2021 Jan 21.
The electro-oxidation of tetracycline (TeC) in methanol medium containing chloride or sulfate ions was evaluated using a DSA®-Cl in a flow reactor and compared with BDD. The results show that after 30 min of electrolysis no TeC is detected by liquid chromatography when chloride is used as supporting electrolyte. On the other hand, after 90 min of electrolysis using a BDD anode only 61% of TeC was removed from solutions with chloride, but in the presence of sulfate the removal reaches 94%. This evidences that the oxidizing species generated during electrochemical oxidation control the process and the mechanism of degradation of the TeC. Besides that, it was possible to infer that only a small amount of methanol might convert to formaldehyde or formic acid, although they were not detected according to the nil changes in the FTIR spectra or in the HPLC chromatograms recorded.
采用流动反应器中的 DSA®-Cl 对含氯或硫酸盐离子的甲醇介质中的四环素（TeC）进行了电氧化评价，并与 BDD 进行了比较。结果表明，当使用氯作为支持电解质时，经过 30 分钟的电解，液相色谱法未检测到 TeC。另一方面，使用 BDD 阳极进行 90 分钟的电解后，只有 61%的 TeC 从含氯溶液中被去除，但在存在硫酸盐的情况下，去除率达到 94%。这证明了在电化学氧化过程中产生的氧化物种控制着 TeC 的降解过程和机制。此外，尽管根据记录的 FTIR 光谱或 HPLC 色谱图没有变化，推断只有少量甲醇可能转化为甲醛或甲酸。
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