摘要
结合泡沫吸收塔除尘原理和雾滴湍流冲击原理等多种粉尘捕集原理，自制一种新型纳米粉尘湿法捕集装置，可对空气中纳米粉尘进行有效采集。对装置的采集原理及各部件进行了深入分析和详细介绍。根据绘制的纳米TiO2吸光度与浓度的工作曲线，应用分光光度法测定捕集液中纳米TiO2粉尘的浓度，进而准确掌握被采集区域空气中纳米TiO2粉尘的浓度。分别用纳米粒度仪和电子显微镜对装置采集到的纳米TiO2粉尘与实际生产纳米TiO2产品进行表征，结果发现两者在粒度分布和形貌等方面均表现出很好的一致性。
The foam capture theory of dust tower and onflow fogdrop impaction principle were employed and combined to develop a sampling device for nanometer aerosols. The nano-aerosols could be sampled effectively with the self-made device. The sampling mechanism and functions of its parts were introduced in detail. Based on the working curve of absorbency and concentration of nanometer TiO2,the concentration of TiO2 of sampling liquid in the sampling device could be tested with spectrophotometer at 410 nm wavelength. According to the result, the concentration of TiO2 nano-aerosol in the air was calculated precisely. The nanometer sizer and TEM were employed to test the diameter distributions and microstructure profiles of TiO2 of sampling and producing, respectively. The results presented good consistency with each other.
出处
《中国粉体技术》
CAS
北大核心
2009年第1期28-30,共3页
China Powder Science and Technology
基金
国家重点基础研究发展计划(973计划)项目,编号:2006CB932504。
关键词
纳米粉尘
捕集装置
湿法
nano-aerosol
sampling device
wet method
