Research &amp; Citations

Ultra compact multi-channel particle sampler for personal exposure of particle chemical composition at hourly resolution

2025 · X. Qin, X. Liu, Y. Wei, et al., M. Zheng, Z. Ning · Environment International · DOI: 10.1016/j.envint.2025.109898

An ultra-compact multi-channel personal sampler captures particle chemical composition, including metals and PAHs, at hourly resolution for personal-exposure assessment.

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PES

Temporal Evolution of Vehicle Exhaust Plumes in a Congested Street Canyon Environment

2024 · M.-Y. Chu, P. Brimblecombe, P. Wei, C.-H. Liu, Z. Ning · Environments · DOI: 10.3390/environments11030057

One-second-resolution kerbside NOx measurements on Hennessy Road, Hong Kong tracked the temporal evolution and dispersion of individual vehicle exhaust plumes within the first metres of their on-road source.

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Application of roadside air purifiers in urban street canyons: A pilot-scale study in Hong Kong

2024 · X. Li, et al., Z. Ning, et al. · Science of the Total Environment · DOI: 10.1016/j.scitotenv.2023.168671

A pilot-scale Hong Kong study used roadside sensors to evaluate the real-world effectiveness of street-canyon air purifiers in reducing kerbside pollution.

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Analysis of an ozone episode in the Greater Bay Area based on low-cost sensor network

2024 · W. Chen, Y. Yang, H. Mei, et al., S. Y. Jiang, Z. Ning · Atmospheric Environment · DOI: 10.1016/j.atmosenv.2024.120367

A high-density ad-hoc low-cost sensor network characterised a high-ozone episode in the Greater Bay Area, separating local formation from regional transport.

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PAS

Unveiling vertical ozone variation with UAV-Based monitoring and modeling: A new challenge for city-level ozone pollution control in the Pearl River Delta region

2024 · H. Xu, Y. Li, C. Lin, Z. Ning, et al. · Atmospheric Environment · DOI: 10.1016/j.atmosenv.2024.120368

UAV-based monitoring and modeling captured vertical ozone variation during an episode in the Pearl River Delta, informing city-level ozone-control strategy.

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Sirius

Evaluating methods for marine fuel sulfur content using microsensor sniffing systems on ocean-going vessels

2024 · S. Yang, M. A. Ghadikolaei, N. K. Gali, Z. Xu, M. Chu, X. Qin, Z. Ning · Science of the Total Environment · DOI: 10.1016/j.scitotenv.2024.173765

Three fuel-sulfur-content calculation methods for UAV microsensor sniffing of ocean-going vessels were evaluated to improve emission-control-area enforcement.

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Sirius

Estimating individual vehicle emission factors from near-road measurements in India

2023 · N. Raparthi, A. Barudgar, M. Chu, Z. Ning, H. C. Phuleria · Atmospheric Environment · DOI: 10.1016/j.atmosenv.2023.119869

Using low-cost roadside sensors near roads in India for the first time, the study derived individual-vehicle emission factors and found about 14% of high-emitting vehicles produced 37-54% of total emissions.

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Roadside NO2/NOx and primary NO2 from individual vehicles

2023 · P. Brimblecombe, M. Chu, C.-H. Liu, Y. Fu, P. Wei, Z. Ning · Atmospheric Environment · DOI: 10.1016/j.atmosenv.2022.119562

Roadside measurements of individual vehicles quantified primary NO2 and the NO2/NOx ratio in a Hong Kong street canyon, informing exposure and health-risk assessment of kerbside traffic pollution.

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The application of a multi-channel sensor network to decompose the local and background sources and quantify their contributions

2023 · X. Qin, P. Wei, M. A. Ghadikolaei, N. K. Gali, Y. Wang, Z. Ning · Building and Environment · DOI: 10.1016/j.buildenv.2023.110005

A multi-channel particulate sensor network with iterative wavelet decomposition separated local construction-dust emissions from background sources and quantified each contribution.

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The development and application of a novel helicopter-based airborne platform for near-surface monitoring and sampling of atmospheric pollutants

2023 · Y. Sun, Y. Mai, N. K. Gali, P. Brimblecombe, Z. Ning, D. Gu · Atmospheric Environment · DOI: 10.1016/j.atmosenv.2023.120061

A novel helicopter-based airborne sensing-and-sampling platform profiled near-surface pollutants at multiple heights, giving insight into ozone and VOC transport and formation.

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Respiratory Effects of Traffic-Related Air Pollution: A Randomized, Crossover Analysis of Lung Function, Airway Metabolome, and Biomarkers of Airway Injury

2023 · X. Zhu, Q. Zhang, X. Du, et al., R. Chen, H. Kan, J. Cai · Environmental Health Perspectives · DOI: 10.1289/EHP11139

A randomized crossover study analysed lung function, the airway metabolome and injury biomarkers to characterise the respiratory effects of traffic-related air pollution.

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High Resolution On-Road Air Pollution Using a Large Taxi-Based Mobile Sensor Network

2022 · Y. Sun, P. Brimblecombe, P. Wei, et al., Q. Fu, Z. Ning · Sensors · DOI: 10.3390/s22166005

A taxi-mounted mobile sensor network on 125 Shanghai taxis mapped CO, NO2 and PM2.5 at high spatial resolution, achieving about 80% road coverage with 80-100 taxis.

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Dynamic molecular choreography induced by traffic exposure: A randomized, crossover trial using multi-omics profiling

2022 · X. Du, Q. Zhang, Y. Jiang, et al., R. Chen, H. Kan · Journal of Hazardous Materials · DOI: 10.1016/j.jhazmat.2021.127359

A randomized crossover trial with multi-omics profiling and personal exposure monitoring revealed dynamic molecular responses induced by traffic-related air-pollution exposure.

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Cardiovascular effects of traffic-related air pollution: A multi-omics analysis from a randomized, crossover trial

2022 · Q. Zhang, X. Du, H. Li, et al., R. Chen, H. Kan · Journal of Hazardous Materials · DOI: 10.1016/j.jhazmat.2022.129031

A randomized crossover multi-omics trial, using personal exposure monitoring, linked traffic-related air-pollution exposure to measurable cardiovascular effects.

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Lung function decline associated with individual short-term exposure to PM1, PM2.5 and PM10 in patients with allergic rhinoconjunctivitis

2022 · S. Li, G. Wang, Y. Geng, W. Wu, X. Duan · Science of the Total Environment · DOI: 10.1016/j.scitotenv.2022.158151

Individual short-term exposure to PM1, PM2.5 and PM10 was associated with lung-function decline in patients with allergic rhinoconjunctivitis, with PM1 showing the strongest association.

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NOx and CO Fluctuations in a Busy Street Canyon

2021 · P. Brimblecombe, M. Chu, C.-H. Liu, Z. Ning · Environments · DOI: 10.3390/environments8120137

High-time-resolution roadside sensors captured rapid NOx and CO fluctuations in a busy Hong Kong street canyon, linking short-lived concentration peaks to passing-vehicle exhaust and pedestrian exposure.

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Determination of local traffic emission and non-local background source contribution to on-road air pollution using fixed-route mobile air sensor network

2021 · P. Wei, P. Brimblecombe, F. Yang, et al., Z. Ning · Environmental Pollution · DOI: 10.1016/j.envpol.2021.118055

A fixed-route mobile air-sensor network apportioned local traffic emissions from non-local background contributions to on-road and near-road air pollution.

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Reducing the Influence of Environmental Factors on Performance of a Diffusion-Based Personal Exposure Kit

2021 · H. Zong, P. Brimblecombe, L. Sun, P. Wei, et al., Z. Ning · Sensors · DOI: 10.3390/s21144637

Methods were developed to reduce environmental-factor influence on a diffusion-based Personal Exposure Kit (PEK), improving portable low-cost personal exposure monitoring.

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Factors affecting variability in gaseous and particle microenvironmental air pollutant concentrations in Hong Kong primary and secondary schools

2020 · W. W. Che, et al. · Indoor Air · DOI: 10.1111/ina.12725

Real-time PM10, PM2.5, NO2 and O3 monitoring across 32 Hong Kong schools showed infiltrated outdoor air is the dominant driver of classroom pollutant levels, with building and ventilation factors explaining much of the variability.

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IAQ

PRAISE-HK: A personalized real-time air quality informatics system for citizen participation in exposure and health risk management

2020 · W. Che, H. C. Frey, J. C. H. Fung, Z. Ning, et al., A. K. H. Lau · Sustainable Cities and Society · DOI: 10.1016/j.scs.2019.101986

PRAISE-HK is a personalized, real-time air-quality informatics system that delivers street-level exposure and health-risk information to support citizen participation in Hong Kong.

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MAS PAS

Development and evaluation of a robust temperature sensitive algorithm for long term NO2 gas sensor network data correction

2020 · P. Wei, L. Sun, A. Anand, et al., Z. Ning · Atmospheric Environment · DOI: 10.1016/j.atmosenv.2020.117509

A robust, temperature-sensitive calibration algorithm was developed and validated to correct long-term NO2 gas-sensor network data across space and time.

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Protocol development for real-time ship fuel sulfur content determination using drone based plume sniffing microsensor system

2020 · A. Anand, P. Wei, N. K. Gali, et al., Z. Ning · Science of the Total Environment · DOI: 10.1016/j.scitotenv.2020.140885

A drone-based plume-sniffing microsensor system and protocol were developed to determine ship fuel-sulfur content in real time.

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Sirius

Direct measurement of new particle formation based on tethered airship around the top of the planetary boundary layer in eastern China

2019 · X. Qi, et al., Z. Ning, et al. · Atmospheric Environment · DOI: 10.1016/j.atmosenv.2019.04.024

Sensors carried on a tethered airship provided direct measurements of new-particle formation near the top of the planetary boundary layer over eastern China.

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Energy consumption, indoor thermal comfort and air quality in a commercial office with retrofitted heat, ventilation and air conditioning (HVAC) system

2019 · W. W. Che, C. Y. Tso, L. Sun, et al., A. K. H. Lau · Energy & Buildings · DOI: 10.1016/j.enbuild.2019.06.029

Monitoring of a commercial office with a retrofitted HVAC system assessed the co-benefits for energy consumption, thermal comfort and indoor air quality.

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Impact Analysis of Temperature and Humidity Conditions on Electrochemical Sensor Response in Ambient Air Quality Monitoring

2018 · P. Wei, Z. Ning, et al. · Sensors · DOI: 10.3390/s18020059

Systematic analysis quantified how temperature and humidity affect electrochemical CO/NO/NO2 sensor response, informing correction methods for reliable ambient air-quality monitoring.

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Development and Application of a Next Generation Air Sensor Network for the Hong Kong Marathon 2015 Air Quality Monitoring

2016 · L. Sun, K. C. Wong, P. Wei, et al., Z. Ning · Sensors · DOI: 10.3390/s16020211

A next-generation electrochemical air-sensor network with multi-parameter correction (within 5% error) was deployed along the 2015 Hong Kong Marathon route to broadcast real-time, route-specific air quality and AQHI.

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