Article
Environmental Sciences
Louise Boge Frederickson, Hugo Savill Russell, Dafni Fessa, Jibran Khan, Johan Albrecht Schmidt, Matthew Stanley Johnson, Ole Hertel
Summary: This study examined the performance of low-cost sensor devices for monitoring air pollution levels in urban areas. The results showed significant variations in air pollution levels over short distances, with higher concentrations of NO2 near busy roads. The study demonstrated that low-cost sensors can accurately measure air pollution exposure with high spatiotemporal resolution.
Article
Biotechnology & Applied Microbiology
A. Zafra-Perez, C. Boente, A. Sanchez de la Campa, J. A. Gomez-Galan, J. D. de la Rosa
Summary: This study proposes a novel methodology for the space-time monitoring of PM concentrations in open-pit mines using mobile low-cost sensors. The study revealed the main sources of PM within the mine and discovered the routes of escape of fugitive emissions from the mine. These findings are important for solving the monitoring issue in mining ambiances and promoting the environmentally friendly development of mines.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Environmental Sciences
Marie-Laure Aix, Sean Schmitz, Dominique J. Bicout
Summary: Low-cost sensors (LCS) of particulate matter (PM) are increasingly used worldwide to accurately assess individual exposure to pollutants. However, a standardized methodology for calibrating PM sensors is still lacking. In this study, a calibration method combining an adaptation of an approach for gas-phase pollutants and a dust event preprocessing is developed for PM LCS commonly used in urban environments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Chemical
Michael R. Giordano, Carl Malings, Spyros N. Pandis, Albert A. Presto, V. F. McNeill, Daniel M. Westervelt, Matthias Beekmann, R. Subramanian
Summary: Low-cost sensors for particulate matter mass (PM) provide spatially dense, high temporal resolution measurements of air quality, especially beneficial in low and middle-income countries with limited reference grade measurements. However, these sensors also face challenges that must be addressed to ensure data quality.
JOURNAL OF AEROSOL SCIENCE
(2021)
Article
Environmental Sciences
Louise B. Frederickson, Hugo S. Russell, Siegfried Raasch, Zhaoxi Zhang, Johan A. Schmidt, Matthew S. Johnson, Ole Hertel
Summary: In a study conducted at the University of Copenhagen, Denmark, a network of five low-cost air pollution sensor nodes was deployed on the exterior of a building to investigate the transport of pollution from the road below. The results indicated that traffic serves as a common source for air pollution, noise, and traffic count. The correlations between these parameters were generally low, but increased under certain wind conditions. The vertical concentration profile of pollutants did not show a significant gradient. The study also found that the profile is sensitive to stratification conditions.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Biochemistry & Molecular Biology
Tatiana D. Silva, Celia Alves, Helena Oliveira, Iola F. Duarte
Summary: This study comprehensively characterized PM10 from residential and traffic-impacted areas in a Portuguese city and investigated its biological effects on lung epithelial cells. The results showed that PM10 extracts could induce cellular toxicity, oxidative stress, mitochondrial damage, and cell cycle arrest, as well as modulate intracellular metabolic processes. Interestingly, PM10 samples rich in toxic substances had a greater impact on cell metabolism.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Engineering, Multidisciplinary
Sylvain Poupry, Kamal Medjaher, Cedrick Beler
Summary: Air pollution is a significant environmental and societal issue. This paper introduces a new method for monitoring air quality using low-cost sensor networks, addressing the drawbacks of conventional monitoring methods. The proposed approach ensures reliable data collection and generates diagnostic results through three indicators. The initial implementation of this method demonstrates its adaptability for future implementations and long-term monitoring of air quality.
Article
Environmental Sciences
Mathis L. Messager, Ian P. Davies, Phillip S. Levin
Summary: This study demonstrates novel scalable methods to monitor and predict urban metal pollution at high resolution and large areas. By leveraging widely available datasets and training models with biological monitoring data, they were able to effectively target toxic hotspots in the Puget Sound region, showing promising applications for pollution reduction and stormwater management on a broader scale.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Computer Science, Information Systems
Stefano Chiesa, Antonio Di Pietro, Maurizio Pollino, Sergio Taraglio
Summary: This paper presents an approach utilizing low-cost sensors mounted on urban vehicles for air pollutant monitoring. The system exchanges data with a central computing facility and generates real-time pollutant distribution maps.
ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION
(2022)
Article
Economics
Aner Martinez-Soto, Constanza C. Avendano Vera, Alex Boso, Alvaro Hofflinger, Matthew Shupler
Summary: This study compared air pollution levels in commercial and low/middle-income residential areas of Temuco, Chile during the COVID-19 lockdown and in 2019. It found that during lockdown, affluent areas had higher outdoor PM2.5 pollution from wood heating, while poorer households saw a decline in PM2.5 concentrations. The study suggests that policy efforts should prioritize affordability of clean heating fuels to reduce air pollution and energy poverty in south-central Chile.
Article
Multidisciplinary Sciences
Sachit Mahajan
Summary: Cities worldwide are facing environmental pollution challenges, and traditional monitoring approaches are ineffective. Low-cost and low-power IoT devices have emerged as an alternative for environmental monitoring. However, analyzing and interpreting sensor data poses challenges, which can be addressed through the Soc-IoT framework that combines real-time sensing devices with intuitive data analysis and visualization tools.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Georgios C. Spyropoulos, Panagiotis T. Nastos, Konstantinos P. Moustris
Summary: A significant portion of European cities' population is exposed to harmful levels of air pollution, leading to the installation of low-cost electrochemical sensor monitoring systems. The market is developing new air quality monitoring systems to provide forecasting services based on advanced technologies, protocols, and characteristics. This study compares data quality and Air Quality Index between low-cost sensors and fixed monitoring stations, revealing the need for flexible and affordable alternatives for monitoring low-cost gas sensors.
Article
Environmental Sciences
Radmila Gagic, Maja Skuric, Gordana Djukanovic, Danilo Nikolic
Summary: This study focuses on the impact of cruise ships on port areas, investigating the correlation between cruise ship activities and pollutants using low-cost sensors. The research found that weather conditions and cruise ship operations have significant effects on local pollution levels.
Article
Computer Science, Artificial Intelligence
Krittakom Srijiranon, Narissara Eiamkanitchat, Sakgasit Ramingwong, Kenneth Cosh, Lachana Ramingwong
Summary: This study reviews 100 research articles on the application of data mining techniques in predicting PM10, emphasizing the processes of data preparation, model creation, and model evaluation. The overall process directions and outputs of data mining are summarized, along with recommendations for future research.
WILEY INTERDISCIPLINARY REVIEWS-DATA MINING AND KNOWLEDGE DISCOVERY
(2021)
Article
Chemistry, Analytical
Marian-Emanuel Ionascu, Nuria Castell, Oana Boncalo, Philipp Schneider, Marius Darie, Marius Marcu
Summary: This study investigates the calibration methods for low-cost sensor platforms, which successfully improved the accuracy of CO and O-3 gases and achieved similar accuracy for NO2 gas. Despite the low price level, the platform's performance met the DQO criteria after the calibration algorithms were applied.
Article
Engineering, Chemical
Christopher R. Oxford, Charles M. Rapp, Yang Wang, Purushottam Kumar, Daniel Watson, Julianna L. Portelli, Eric A. Sussman, Steven Dhawan, Jingkun Jiang, Brent J. Williams
AEROSOL SCIENCE AND TECHNOLOGY
(2019)
Article
Geosciences, Multidisciplinary
Jitendra Sinha, Radhika Sahu, R. K. Sahu, G. K. Nigam
PHYSICS AND CHEMISTRY OF THE EARTH
(2019)
Article
Environmental Sciences
Vipul Lalchandani, Varun Kumar, Anna Tobler, Navaneeth M. Thamban, Suneeti Mishra, Jay G. Slowik, Deepika Bhattu, Pragati Rai, Rangu Satish, Dilip Ganguly, Suresh Tiwari, Neeraj Rastogi, Shashi Tiwari, Griga Motnik, Andre S. H. Prevot, Sachchida N. Tripathi
Summary: The study conducted real-time chemical characterization of fine particulate matter in different locations in Delhi, finding that PM2.5 and PM1 particles are mainly composed of organics, followed by chloride, ammonium, nitrate, sulfate, and black carbon. There were significant differences in the absolute OOA concentration between the two urban sites, indicating the influence of local emissions on the oxidized OA formation. The chemical composition, diurnal and temporal variations of PM at the three sites suggest similar sources affecting particulate pollution in Delhi and adjoining cities, but with more local influence than regional.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Sagnik Dey, Bhavesh Purohit, Palak Balyan, Kuldeep Dixit, Kunal Bali, Alok Kumar, Fahad Imam, Sourangsu Chowdhury, Dilip Ganguly, Prashant Gargava, V. K. Shukla
Article
Chemistry, Multidisciplinary
Kanan Patel, Sahil Bhandari, Shahzad Gani, Mark Joseph Campmier, Purushottam Kumar, Gazala Habib, Joshua Apte, Lea Hildebrandt Ruiz
Summary: This study focuses on the pollution situation in Delhi, India, during autumn, one of the most polluted seasons in the city. The research finds that the organic aerosol (OA) spectrum may come from different factors, such as hydrocarbon-like OA (HOA), biomass burning OA (BBOA), and oxidized OA (OOA). The study also shows the influence of regional sources, pollutants, PMF factors, meteorology, and nonparametric wind regression analysis, as well as the impact of metals during the festival of Diwali. Overall, the analysis provides new insights into the factors controlling PM during one of the most polluted seasons in Delhi.
ACS EARTH AND SPACE CHEMISTRY
(2021)
Article
Meteorology & Atmospheric Sciences
V Lalchandani, D. Srivastava, J. Dave, S. Mishra, N. Tripathi, A. K. Shukla, R. Sahu, N. M. Thamban, S. Gaddamidi, K. Dixit, D. Ganguly, S. Tiwari, A. K. Srivastava, L. Sahu, N. Rastogi, P. Gargava, S. N. Tripathi
Summary: Delhi metropolitan area experiences severe haze during the post-monsoon and winter season, mainly composed of organic and secondary inorganic particles. Burning of biomass is the major contributor to haze events, with both long-range transport and local burning as sources. Nighttime oxidation facilitates the rapid formation of organic and inorganic particles.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Meteorology & Atmospheric Sciences
Nidhi Tripathi, L. K. Sahu, Liwei Wang, Pawan Vats, Meghna Soni, Purushottam Kumar, R. Satish, Deepika Bhattu, Ravi Sahu, Kashyap Patel, Pragati Rai, Varun Kumar, Neeraj Rastogi, Narendra Ojha, Shashi Tiwari, Dilip Ganguly, Jay Slowik, Andre S. H. Prevot, Sachchida N. Tripathi
Summary: Simultaneous measurements of VOCs using two PTR-TOF-MS instruments were conducted in urban and suburban sites of New Delhi. The study found that the mixing ratios of VOCs were influenced by local emissions and meteorological conditions, with different levels at different locations. In addition to vehicular emissions, biomass burning, industrial plumes, and aged air also strongly influenced VOC levels. The study also highlighted the contribution of secondary/biogenic sources to VOCs in suburban areas.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Environmental Sciences
Karn Vohra, Eloise A. Marais, Shannen Suckra, Louisa Kramer, William J. Bloss, Ravi Sahu, Abhishek Gaur, Sachchida N. Tripathi, Martin Van Damme, Lieven Clarisse, Pierre-F Coheur
Summary: This study examined air quality in cities in the UK and India using space-based instruments, finding improvements in air quality in London and Birmingham, but increasing pollution levels in Delhi and Kanpur. Trends in pollutants varied between cities, with no significant correlation between aerosol optical depth and PM2.5 concentrations.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Meteorology & Atmospheric Sciences
Ravi Sahu, Ayush Nagal, Kuldeep Kumar Dixit, Harshavardhan Unnibhavi, Srikanth Mantravadi, Srijith Nair, Yogesh Simmhan, Brijesh Mishra, Rajesh Zele, Ronak Sutaria, Vidyanand Motiram Motghare, Purushottam Kar, Sachchida Nand Tripathi
Summary: This paper presents a study on the deployment and calibration of air quality monitoring devices using Alphasense O-3 and NO2 sensors in two megacities, offering a novel local non-parametric calibration algorithm and key recommendations for calibration performance enhancement.
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2021)
Article
Meteorology & Atmospheric Sciences
James F. Hurley, Nathan M. Kreisberg, Braden Stump, Chenyang Bi, Purushottam Kumar, Susanne Hering, Pat Keady, Gabriel Isaacman-VanWertz
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2020)
Article
Environmental Sciences
Pragati Rai, Markus Furger, Imad El Haddad, Varun Kumar, Liwei Wang, Atinderpal Singh, Kuldeep Dixit, Deepika Bhattu, Jean-Eudes Petit, Dilip Ganguly, Neeraj Rastogi, Urs Baltensperger, Sachchida Nand Tripathi, Jay G. Slowik, Andre S. H. Prevot
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)