Wang Sen, Wang Wen-chun, Yang De-zheng, Liu Zhi-jie, Zhang Shuai
Key Lab of Materials Modification (Dalian University of Technology), Ministry of Education, Dalian 116024, China.
Key Lab of Materials Modification (Dalian University of Technology), Ministry of Education, Dalian 116024, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Oct 15;131:571-6. doi: 10.1016/j.saa.2014.04.061. Epub 2014 Apr 20.
In this study, a bipolar nanosecond pulse with 20ns rising time is employed to generate air gas-liquid diffuse discharge plasma with room gas temperature in quartz tube at atmospheric pressure. The image of the discharge and optical emission spectra of active species in the plasma are recorded. The plasma gas temperature is determined to be approximately 390K by compared the experimental spectra with the simulated spectra, which is slightly higher than the room temperature. The result indicated that the gas temperature rises gradually with pulse peak voltage increasing, while decreases slightly with the electrode gap distance increasing. As an important application, bipolar nanosecond pulse discharge is used to sterilize the common microorganisms (Actinomycetes, Candida albicans and Escherichia coli) existing in drinking water, which performs high sterilization efficiency.
在本研究中，采用上升时间为20ns的双极纳秒脉冲在大气压下于石英管中在室温气体条件下产生空气气液扩散放电等离子体。记录了放电图像和等离子体中活性物种的发射光谱。通过将实验光谱与模拟光谱进行比较，确定等离子体气体温度约为390K，略高于室温。结果表明，气体温度随着脉冲峰值电压的增加而逐渐升高，而随着电极间隙距离的增加略有下降。作为一项重要应用，双极纳秒脉冲放电用于对饮用水中存在的常见微生物（放线菌、白色念珠菌和大肠杆菌）进行灭菌，灭菌效率很高。
