Cold plasma technology is an advanced oxidation process (AOP), which has shown significant potential for pesticide degradation. The aim of this study was to determine the degradation efficacy and transformation products for cold plasma treated carbamates in water. The dissipation of three carbamates, namely, carbaryl, methiocarb and aminocarb were evaluated as a function of treatment voltage (70, 80, and 90 kV) and duration (1 to 5 min) using a dielectric barrier discharge. Significant and rapid reduction in the concentrations of carbaryl, methiocarb and aminocarb were observed after cold plasma treatment. A maximum degradation of 50.5% in carbaryl, 99.6% in methiocarb and 99.3% in aminocarb was achieved after 5 min of treatment at an applied voltage of 90 kV. The plasma light emission was evaluated using optical emission spectroscopy revealing the production of reactive oxygen and nitrogen species, besides gas temperatures closer to ambient. The reaction intermediates were identified mostly as oxidation products from the respective carbamates, and reaction pathways were proposed. The toxicity of the degradation products, where available, was reviewed. Overall, this study shows the potential of cold plasma technology as an alternative approach for rapid dissipation of agrochemicals and other micro-pollutants in water and wastewater.

中文翻译：

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大气压冷等离子体作为降解水中氨基甲酸酯残留物的潜在技术

冷等离子体技术是一种高级氧化工艺 (AOP)，已显示出对农药降解的巨大潜力。本研究的目的是确定冷等离子体处理的氨基甲酸酯在水中的降解功效和转化产物。三种氨基甲酸酯的耗散，即甲萘威、甲硫威和氨基威，使用介质阻挡放电作为处理电压（70、80 和 90 kV）和持续时间（1 至 5 分钟）的函数进行评估。在冷等离子体处理后观察到西维因、甲硫威和氨基威的浓度显着且快速降低。在施加 90 kV 电压下处理 5 分钟后，甲萘威的最大降解率为 50.5%，甲硫威为 99.6%，氨基威为 99.3%。等离子体光发射使用光发射光谱进行评估，揭示了活性氧和氮物种的产生，除了更接近环境的气体温度。反应中间体主要被鉴定为来自各自氨基甲酸酯的氧化产物，并提出了反应途径。对降解产物的毒性（如果有）进行了审查。总体而言，这项研究显示了冷等离子体技术作为快速消散水和废水中农用化学品和其他微污染物的替代方法的潜力。对降解产物的毒性（如果有）进行了审查。总的来说，这项研究显示了冷等离子体技术作为快速消散水和废水中农用化学品和其他微污染物的替代方法的潜力。对降解产物的毒性（如果有）进行了审查。总体而言，这项研究显示了冷等离子体技术作为快速消散水和废水中农用化学品和其他微污染物的替代方法的潜力。