{"title":"空气中与聚苯乙烯（PS）/水接触的纳秒放电引起的聚苯乙烯（PS）降解","authors":"Aurélie Zamo, Catherine Rond, A. Hamdan","doi":"10.3390/plasma7010004","DOIUrl":null,"url":null,"abstract":"Water pollution with microplastics has become a significant concern. Conventional treatment methods have proven ineffective, and alternatives are being explored. Herein, we assess the degradation efficiency of polystyrene (PS) by measuring its nanosecond discharge in air in contact with water. Its discharge is characterized during processing, and a transition from streamer-like to spark-like discharge occurs due to the increased electrical conductivity of water. Experiments are conducted at different frequencies, and the highest degradation is achieved at 10 kHz; an 83% polystyrene weight loss is recorded after 5 min of processing. The optical spectra of the discharge show no evidence of C-species, and an FTIR analysis of the processed polystyrene reveals no structural modifications. An NMR analysis shows the presence of ethylbenzene in water. Finally, a mechanism of PS degradation is proposed.","PeriodicalId":509984,"journal":{"name":"Plasma","volume":" 6","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Polystyrene (PS) Degradation Induced by Nanosecond Electric Discharge in Air in Contact with PS/Water\",\"authors\":\"Aurélie Zamo, Catherine Rond, A. Hamdan\",\"doi\":\"10.3390/plasma7010004\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Water pollution with microplastics has become a significant concern. Conventional treatment methods have proven ineffective, and alternatives are being explored. Herein, we assess the degradation efficiency of polystyrene (PS) by measuring its nanosecond discharge in air in contact with water. Its discharge is characterized during processing, and a transition from streamer-like to spark-like discharge occurs due to the increased electrical conductivity of water. Experiments are conducted at different frequencies, and the highest degradation is achieved at 10 kHz; an 83% polystyrene weight loss is recorded after 5 min of processing. The optical spectra of the discharge show no evidence of C-species, and an FTIR analysis of the processed polystyrene reveals no structural modifications. An NMR analysis shows the presence of ethylbenzene in water. Finally, a mechanism of PS degradation is proposed.\",\"PeriodicalId\":509984,\"journal\":{\"name\":\"Plasma\",\"volume\":\" 6\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-01-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Plasma\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.3390/plasma7010004\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plasma","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3390/plasma7010004","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
微塑料造成的水污染已成为一个重大问题。传统的处理方法已被证明无效，人们正在探索替代方法。在这里，我们通过测量聚苯乙烯（PS）在空气中与水接触时的纳秒级放电来评估其降解效率。在加工过程中，由于水的导电性增强，聚苯乙烯的放电会从流线型过渡到火花型。实验在不同频率下进行，在 10 千赫时降解程度最高；处理 5 分钟后记录到聚苯乙烯重量减少 83%。放电的光学光谱显示没有 C 种的迹象，对处理过的聚苯乙烯进行的傅立叶变换红外分析显示没有结构改变。核磁共振分析显示水中存在乙苯。最后，提出了聚苯乙烯降解的机理。
Polystyrene (PS) Degradation Induced by Nanosecond Electric Discharge in Air in Contact with PS/Water
Water pollution with microplastics has become a significant concern. Conventional treatment methods have proven ineffective, and alternatives are being explored. Herein, we assess the degradation efficiency of polystyrene (PS) by measuring its nanosecond discharge in air in contact with water. Its discharge is characterized during processing, and a transition from streamer-like to spark-like discharge occurs due to the increased electrical conductivity of water. Experiments are conducted at different frequencies, and the highest degradation is achieved at 10 kHz; an 83% polystyrene weight loss is recorded after 5 min of processing. The optical spectra of the discharge show no evidence of C-species, and an FTIR analysis of the processed polystyrene reveals no structural modifications. An NMR analysis shows the presence of ethylbenzene in water. Finally, a mechanism of PS degradation is proposed.
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