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Student BIOS

LI Jinjian

PhD in Environmental Science, Policy and Management - 2021

B.S. in Environmental Science, Beijing Normal University

Email: jlics@ust.hk

Supervisor:  Prof. LAU Alexis       Co-Supervisor: Prof. YU Jianzhen

Research Topic  
Aging characteristics of submicron aerosols investigated using the potential aerosol mass chamber GoPAM coupled with AMS
Keywords  
submicron aerosol, AMS, potential aerosol mass (PAM)
Abstract  

Atmospheric particulate matter (PM) is responsible for various environmental effects, including climate change, visibility degradation, and public health threat. More severe influence of PM pollution in urban areas of megacities like Hong Kong calls for performing effective and accurate PM measurements to investigate its physical and chemical characteristics. Aerosol Mass Spectrometer (AMS) is one of the newly developed high-time-resolution online instruments that provides chemically speciated mass concentrations and aerosol mass spectra of a certain part of PM, namely non-refractory particles with a diameter smaller than 1 µm (NR-PM1). My study aims to investigate the total mass, chemical composition, formation mechanisms, and source apportionment of NR-PM1. We will apply AMS to measure the mass concentration and chemical speciation of ambient air, and illustrate its oxidation potential and formation processes by adding a Potential Aerosol Mass Oxidation Reactor (PAM) that simulates atmospheric oxidation conditions before AMS. We will also use Positive Matrix Factorization analysis to do the source apportionment. Analysis results will enable efficient control strategies for not only such urban locations in Hong Kong, but also highly populated areas affected by similar climate patterns and traffic and residential emissions in the Pearl River Delta region.

Journal Publication
Jinjian Li, Qianyun Liu, Yongjie Li, Tengyu Liu, Dandan Huang, Jing Zheng, Wenfei Zhu, Min Hu, Yusheng Wu, Shengrong Lou, Åsa Hallquist, Mattias Hallquist, Chak K. Chan, Francesco Canonaco, André S.H. Prévôt, Jimmy Fung, Alexis Lau, Jian Zhen YU (2019) Characterization of Aerosol Aging Potentials at Suburban Sites in Northern and Southern China Utilizing a Potential Aerosol Mass (Go:PAM) Reactor and an Aerosol Mass Spectrometer. Journal of Geophysical Research Atmospheres, 124, 10.1029/2018JD029904.
Ben Liu, Mandy Minle He, Cheng Wu, Jinjian Li, Ying Li, Ngai Ting Lau, Jian Zhen Yu, Alexis K.H. Lau, Jimmy C.H. Fung, Ka In Hoi, Kai Meng Mok, Chak K. Chan, Yong Jie Li (2019) Potential exposure to fine particulate matter (PM2.5) and black carbon on jogging trails in Macau. Atmospheric Environment, 198, 10.1016/j.atmosenv.2018.10.024.
Douglas Morrison, Jinjian Li, Ian Crawford, Wenwei Che, Michael Flynn, Man Nin Chan, Alexis K. H. Lau, Jimmy C. H. Fung, David Topping, Jianzhen Yu, Martin Gallagher (2020) The Observation and Characterisation of Fluorescent Bioaerosols Using Real-Time UV-LIF Spectrometry in Hong Kong from June to November 2018. Atmosphere, 11, 10.3390/atmos11090944.
Presentations/Talks
Title Date Length Type and Location
Aging characteristics of submicron aerosols at the HKUST site investigated using the potential aerosol mass chamber GoPAM coupled with AMS 2017-08-24 15 min Photochemical Smog in China: Formation, transformation, impact and abatement strategies. Gothenburg, Sweden
Characterization of aerosol aging potentials at suburban sites in Northern and Southern China utilizing a Potential Aerosol Mass (Go:PAM) reactor and HR-ToF-AMS 2019-05-28 15 min 11th Asian Aerosol Conference. Hong Kong, China
Characterization of aerosol aging potentials at suburban sites in Northern and Southern China utilizing the Gothenburg Potential Aerosol Mass (Go:PAM) and AMS 2019-08-28 15 min European Aerosol Conference 2019. Gothenburg, Sweden
Characterization of aerosol aging potentials in Northern and Southern China utilizing the Gothenburg Potential Aerosol Mass and AMS 2019-10-07 10 min Photochemical Smog in China: Formation, transformation, impact and abatement strategies (final workshop). Beijing, China
Teaching Assistant
Semester Course Code Course Title Class Size
2016-17 Spring ENVR 2020 Urban Air Pollution 44
2019-20 Fall ENVR 3110 Sustainable Development 32
Outbound Activities
Period Country Institute/Company
2018-12-11 to 2018-12-18 United Kingdom The School of Earth and Environmental Science, the University of Manchester
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