10:15am - 10:30amTH1-1: 1
Exploring the Impact of Pollution Sources on the Oxidative Potential of Fine Aerosols in a Portuguese Urban-Industrial Area
Nuno Canha1,2, Sara Gonçalves1, Diogo Sousa1, Carolina Vicente1, Sérgio Sousa3, Carla Gamelas1,3, Sandra Cabo Verde1, Susana Marta Almeida1, Anna Rita de Bartolomeo4, Maria Rachele Guascito4,5, Eva Merico5, Daniele Contini5
1Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Portugal; 2HyLab - Green Hydrogen Collaborative Laboratory, Central Termoeléctrica, Sines, Portugal; 3Instituto Politécnico de Setúbal, Escola Superior de Tecnologia de Setúbal, Setúbal, Portugal; 4Department of Biological and Environmental Sciences and Technologies - DiSTeBA, University of Salento, Lecce, Italy; 5Institute of Atmospheric Sciences and Climate, ISAC-CNR, Lecce, Italy
This study targets to determine the oxidative potential (OP) of fine aerosols in an urban-industrial area near Lisbon and to identify the pollution sources with impact on the OP levels. For this purpose, thirty samples were selected from a set of 128 samples collected over one year, based on the highest load for each source, previously assessed by PMF source apportionment. Significant correlations between OPDTTV values and the mass contributions of the different sources to PM2.5, were found for the sources vehicle exhaust, fuel-oil combustion and industry, which were found to explain 82% of the OPDTTV variability by MLR analysis.
10:30am - 10:45amTH1-1: 2
Characteristics of Persistent Organic Pollutants and Related Chemicals in Southern Taiwan during Northeast Monsoon Periods
Thi-Hieu Le1, Neng-Huei Lin2, Guo-Ping Chang-Chien3, Lin-Chi Wang4
1Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung 811213, Taiwan; 2Department of Atmospheric Sciences, National Central University, Taoyuan 32001, Taiwan; 3Super Micro Mass Research and Technology Center, Cheng Shiu University, Kaohsiung 833301, Taiwan; 4Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 811213, Taiwan
This study examines persistent organic pollutants (POPs), including PAHs, OPEs, and PBDEs, in southern Taiwan during the northeast monsoon (Feb–Mar 2024). Urban sites had higher pollutant levels due to industrial and traffic emissions, with Xiaogang showing the highest BaPeq levels. OPEs (4.57±2.81 ng/m³) exceeded PBDEs by two orders of magnitude, highlighting a shift toward phosphorus-based flame retardants. PAHs were dominated by low-molecular-weight compounds, mainly naphthalene. Correlations suggest combustion as the primary source in rural areas. Seasonal fluctuations were driven by local emissions rather than long-range transport, emphasizing the need for targeted air quality management strategies.
10:45am - 11:00amTH1-1: 3
Charge status of particles generated in a bipolar electrospray aerosol generator
Haiang Xue1,2, Tongzhu Yu1,3, Yixin Yang1,3, Huaqiao Gui1,3, Jianguo Liu1, Da-Ren Chen1,4
1Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, China; 2University of Science and Technology of China, Hefei, 230026, China; 3Environmental Research Institute of Hefei Comprehensive Science Centre, Building E, Phase IV, Electric Park, Shushan Economic and Technological Development Zone, Hefei, China; 4Particle Laboratory, Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, VA, 23284, USA
In this study, we have designed and constructed a multifunctional bipolar electrospray aerosol generation platform, through which we systematically investigated both the charge distribution of resultant particles and the factors influencing the particle coalescence. A preliminary demonstration of the total charge measurements of sucrose particles generated by the developed bipolar ES platform as a function of feeding flow rate is presented in the article.
11:00am - 11:15amTH1-1: 4
Printing of aerosol nanoparticles into 3D interconnects at wafer‐scale
Yuxiang Yin, Bingyan Liu, Jicheng Feng
shanghaitech University, China, People's Republic of
To print nanostructures over a large area remains a challenge, because the resolution and scalability often conflict to each other. Here we programmed a pulsed electric field for printing periodic nanostructures over an entire wafer. These nanostructures are bridge-like in geometry, connecting two isolated pads. As such, they act as the interconnects. The minimum wire-thickness was experimentally realized to 17 nm while maintaining the multimaterial ability to print the next-generation metals. The extensively large area exceeds the previous work by 4 orders of magnitudes. Their conductivities are also measured and predicted, comparable to those using film-technologies.
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