报告题目：A ‘Concentrate-and-Destroy’ technology for efficient adsorption and destruction of PFAS in contaminated water

报告人：Dongye Zhao, Professor and Department Chair（San Diego State University Department of Civil, Construction, and Environmental Engineering）

时间：2023年6月22日下午16:00

地点：环境楼B4-308会议室

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报告摘要：

Per- and polyfluoroalkyl substances (PFAS) have been widely detected in aquatic systems. Yet, cost-effective technologies for degradation of PFAS have been lacking. In this study, we developed and tested an innovative “Concentrate-&-Destroy” technology for more cost-effective degradation of PFAS from water. We synthesized, characterized and tested several adsorptive photocatalysts based on commercially available activated carbon (AC) and TiO₂, namely, iron-doped, AC-supported titanate nanotubes (Fe/TNTs@AC), gallium-doped AC-supported titanate nanotubes (Ga/TNTs@AC), carbon sphere (CS) modified iron-oxide (FeO/CS), and CS-modified bismuth phosphate (BiOHP/CS). All the materials were able to rapidly (<10 min) adsorb PFOA, PFOS and GenX. Subsequently, when subjected to UV or solar light, the pre-concentrated PFAS were effectively degraded and defluorinated. Upon photodegradation, the materials can be reused in multiple cycles of adsorption and photodegradation without chemical regeneration.

报告人简介：

Dr. Zhao is currently Professor and Chair of the Civil, Construction, and Environmental Engineering. Before this post, he was the Alumni Endowed Distinguished Professor at Auburn University. Dr. Zhao’s group is internationally recognized for their pioneering work in developing novel stabilized nanoparticles for in situ degradation of organic pollutants and immobilization of metals, metalloids and radionuclides in soil and water. Zhao’s group is also recognized for their pioneering work in developing adsorptive photocatalysts for destruction of per- and polyfluoroalkyl substances (PFAS) in contaminated waters. He has served as PI or Co-PI for ~50 research projects. He and co-workers have published >230 SCI-indexed journal papers, 1 textbook, 15 book chapters, and 250+ other publications. In addition, he has delivered 135+ invited or keynote presentations, and has been granted 7 U.S. patents. His work has been cited >18,000 times with an h-Index of 68. He is included in both the Clarivate World’s Top 1% Scientists and the Stanford World’s Top 1% Most Cited Scientists. He is serving as Editors for Water Environment Research, Frontiers of Environmental Science & Engineering, and Current Pollution Reports, and he is an editorial board member of three other international journals.