Sonochemical degradation of CCl4 in alcohol-water system

IF 9.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry Pub Date : 2025-09-27 DOI:10.1016/j.ultsonch.2025.107581

Aerfate Abulikemu, Kenji Okitsu

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引用次数: 0

Abstract

In this study, methanol (MeOH), ethanol (EtOH), 1-propanol (PrOH), and ethylene glycol (EG) were used as alcohol-CCl₄ pretreatment solutions for the first time to investigate the effect of alcohol on the sonochemical degradation of CCl₄. The results showed that this pretreatment method provided the homogeneous dissolution of CCl₄ in aqueous solution in a short preparation time and the enhancement of the sonochemical degradation of CCl₄. In addition, the rate of the degradation of CCl₄ related to the hydrophobicity of the added alcohol. It was considered that high hydrophobic alcohol molecules accumulated at the interface region of cavitation bubbles contributed to the scavenging of •OH radicals produced by sonolysis of water and to the pyrolysis itself, resulting in the production of a large amount of •H radicals. The formation of •H radical and its secondary products, such as H₂ could lead to the reductive degradation of CCl₄. In previous studies, the addition of alcohol has been observed only as a negative effect on the sonochemical degradation of organic compounds such as the reduction of bubble temperature, and the quenching of the oxidative degradation by scavenging •OH radicals. However, our results indicated that the positive effects of alcohol on the sonochemical degradation of CCl₄ were more significant than the negative effects.

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CCl4在醇-水体系中的声化学降解

本研究首次以甲醇（MeOH）、乙醇（EtOH）、1-丙醇（PrOH）和乙二醇（EG）作为醇-CCl4的预处理溶液，考察醇对CCl4声化学降解的影响。结果表明，该预处理方法在较短的制备时间内使CCl4在水溶液中溶解均匀，并增强了CCl4的声化学降解能力。此外，CCl4的降解速率与添加醇的疏水性有关。认为在空化泡界面区聚集的高疏水醇分子对水的声解产生的•OH自由基的清除和热解本身起了一定作用，从而产生了大量的•H自由基。•H自由基及其二次产物如H2的形成可导致CCl4的还原性降解。在以往的研究中，只观察到醇的加入对有机化合物的声化学降解有负面影响，如气泡温度的降低，以及通过清除•OH自由基来猝灭氧化降解。然而，我们的研究结果表明，酒精对CCl4声化学降解的积极影响大于消极影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ultrasonics Sonochemistry 化学-化学综合

CiteScore

15.80

自引率

11.90%

发文量

361

审稿时长

59 days

期刊介绍： Ultrasonics Sonochemistry stands as a premier international journal dedicated to the publication of high-quality research articles primarily focusing on chemical reactions and reactors induced by ultrasonic waves, known as sonochemistry. Beyond chemical reactions, the journal also welcomes contributions related to cavitation-induced events and processing, including sonoluminescence, and the transformation of materials on chemical, physical, and biological levels. Since its inception in 1994, Ultrasonics Sonochemistry has consistently maintained a top ranking in the "Acoustics" category, reflecting its esteemed reputation in the field. The journal publishes exceptional papers covering various areas of ultrasonics and sonochemistry. Its contributions are highly regarded by both academia and industry stakeholders, demonstrating its relevance and impact in advancing research and innovation.