Professor David Y. H. PUI from University of Minnesota visited IAP on April 22, upon invitation of the IAP Director General Prof. CAO Junji, and he gave a talk titled "Green Technologies for Sustainable Environment".

Professor PUI is a member of the National Academy of Engineering，USA, and director of the Particle Technology Laboratory, University of Minnesota. He is also the director of the Filtration Research Center, which consists of 20 leading international filtration companies. He has extensive research experience in aerosols and nanoparticles, and has published more than 300 papers and obtained more than 40 patents. He has won several awards, including the Max Planck Research Award (German national award, 1993), the Humboldt Advanced Scientist Research Award (German national award, 2000), the Fox Memorial Award (2010) - the highest award from the American, German and Japanese aerosol associations. He received his Bachelor, Master and PhD degree all from University of Minnesota.

Prof. PUI introduced instruments and samplers to perform atmospheric measurements developed at the Particle Technology Laboratory. The Center for Filtration Research (CFR) at the University of Minnesota, collaborating with 20 leading international filtration companies, was established to find filtration solutions to mitigate PM2.5 and other environmental pollutants. CFR investigators perform fundamental and applied research on air, gas and liquid filtration. A disruptive innovation, namely, the Solar-Assisted Large-Scale Cleaning System (SALSCS), is developed to mitigate PM2.5 pollutants in urban air. The second generation SALSCS is developed to reduce not only the PM2.5 but also CO2 in the atmosphere. The first generation SALSCS in Xi'an was constructed in collaboration with Prof. CAO, who was the principal investigator of the project. Prof PUI’s team is now constructing 2 units of the third generation Air Purification Towers in Delhi funded by the Indian Environmental Control Board to mitigate "hazardous" PM2.5 in Delhi.

Prof. TUI (left) and Prof. CAO