Outputs (10)

The influence of local and regional sources on concentrations of fine particulate matter in Delhi (2025)
Journal Article
Srivastava, D., Alam, M. S., Rooney, D. J., Crilley, L. R., Kramer, L., Saksakulkrai, S., Dhawan, S., Khare, M., Shivan, Gadi, R., Kumar, P., Hama, S., Harrison, R. M., Shi, Z., & Bloss, W. J. (2025). The influence of local and regional sources on concentrations of fine particulate matter in Delhi. Atmospheric Pollution Research, 16(7), Article 102476. https://doi.org/10.1016/j.apr.2025.102476

Delhi is one of the world's most polluted cities, and hence pollution control is a very high priority. A key aspect of a cost-effective strategy is to differentiate emissions from local sources from pollution arising from regional transport. Detailed... Read More about The influence of local and regional sources on concentrations of fine particulate matter in Delhi.

Wastewater reuse and pharmaceutical pollution in agriculture: Uptake, transport, accumulation and metabolism of pharmaceutical pollutants within plants (2024)
Journal Article
Mosharaf, M. K., Gomes, R. L., Cook, S., Alam, M. S., & Rasmusssen, A. (2024). Wastewater reuse and pharmaceutical pollution in agriculture: Uptake, transport, accumulation and metabolism of pharmaceutical pollutants within plants. Chemosphere, 364, Article 143055. https://doi.org/10.1016/j.chemosphere.2024.143055

The presence of pharmaceutical pollutants in water sources has become a growing concern due to its potential impacts on human health and other organisms. The physicochemical properties of pharmaceuticals based on their intended therapeutical applicat... Read More about Wastewater reuse and pharmaceutical pollution in agriculture: Uptake, transport, accumulation and metabolism of pharmaceutical pollutants within plants.

Light painting photography makes particulate matter air pollution visible (2024)
Journal Article
Pope, F. D., Price, R., Woolley, K. E., Luiu, C., Alam, M. S., Avis, W. R., Bartington, S. E., Debebe, D., Getaneh, Z., Greenfield, S. M., Howells, R., Khare, M., Weldetinsae, A., Lawson, C., Mishra, S. K., Neal, B., Newman, K., Singh, A., Teklu Wodajo, B., Thomas, G. N., & Wilder, F. (2024). Light painting photography makes particulate matter air pollution visible. Communications Earth & Environment, 5, Article 294. https://doi.org/10.1038/s43247-024-01409-4

The World Health Organization estimates that air pollution causes approximately seven million premature deaths worldwide each year. Solutions to air pollution are well known, yet this rarely equates to easily actionable. Here we demonstrate how art s... Read More about Light painting photography makes particulate matter air pollution visible.

Factors Influencing the Formation of Nitrous Acid from Photolysis of Particulate Nitrate (2023)
Journal Article
Sommariva, R., Alam, M. S., Crilley, L. R., Rooney, D. J., Bloss, W. J., Fomba, K. W., Andersen, S. T., & Carpenter, L. J. (2023). Factors Influencing the Formation of Nitrous Acid from Photolysis of Particulate Nitrate. Journal of Physical Chemistry A, 127(44), 9302–9310. https://doi.org/10.1021/acs.jpca.3c03853

Enhanced photolysis of particulate nitrate (pNO3) to form photolabile species, such as gas-phase nitrous acid (HONO), has been proposed as a potential mechanism to recycle nitrogen oxides (NOx) in the remote boundary layer (“renoxification”). This ar... Read More about Factors Influencing the Formation of Nitrous Acid from Photolysis of Particulate Nitrate.

Extreme Concentrations of Nitric Oxide Control Daytime Oxidation and Quench Nocturnal Oxidation Chemistry in Delhi during Highly Polluted Episodes (2023)
Journal Article
Nelson, B. S., Bryant, D. J., Alam, M. S., Sommariva, R., Bloss, W. J., Newland, M. J., Drysdale, W. S., Vaughan, A. R., Acton, W. J. F., Hewitt, C. N., Crilley, L. R., Swift, S. J., Edwards, P. M., Lewis, A. C., Langford, B., Nemitz, E., Gadi, R., Gurjar, B. R., Heard, D. E., Whalley, L. K., …Hamilton, J. F. (2023). Extreme Concentrations of Nitric Oxide Control Daytime Oxidation and Quench Nocturnal Oxidation Chemistry in Delhi during Highly Polluted Episodes. Environmental Science and Technology Letters, 10(6), 520-527. https://doi.org/10.1021/acs.estlett.3c00171

Delhi, India, suffers from periods of very poor air quality, but little is known about the chemical production of secondary pollutants in this highly polluted environment. During the postmonsoon period in 2018, extremely high nighttime concentrations... Read More about Extreme Concentrations of Nitric Oxide Control Daytime Oxidation and Quench Nocturnal Oxidation Chemistry in Delhi during Highly Polluted Episodes.

Measurement report: Interpretation of wide-range particulate matter size distributions in Delhi (2022)
Journal Article
Şahin, Ü. A., Harrison, R. M., Alam, M. S., Beddows, D. C., Bousiotis, D., Shi, Z., Crilley, L. R., Bloss, W., Brean, J., Khanna, I., & Verma, R. (2022). Measurement report: Interpretation of wide-range particulate matter size distributions in Delhi. Atmospheric Chemistry and Physics, 22(8), 5415-5433. https://doi.org/10.5194/acp-22-5415-2022

Delhi is one of the world's most polluted cities, with very high concentrations of airborne particulate matter. However, little is known about the factors controlling the characteristics of wide-range particle number size distributions. Here, new mea... Read More about Measurement report: Interpretation of wide-range particulate matter size distributions in Delhi.

Chemical characteristics and source apportionment of particulate matter (PM2.5) in Dammam, Saudi Arabia: Impact of dust storms (2022)
Journal Article
Alwadei, M., Srivastava, D., Alam, M. S., Shi, Z., & Bloss, W. J. (2022). Chemical characteristics and source apportionment of particulate matter (PM2.5) in Dammam, Saudi Arabia: Impact of dust storms. Atmospheric Environment: X, 14, Article 100164. https://doi.org/10.1016/j.aeaoa.2022.100164

Atmospheric particulate matter (PM) is known to be harmful to human and environmental health, with factors including particle size and composition thought to be key drivers of toxicity. Understanding the composition and hence sources of PM is critica... Read More about Chemical characteristics and source apportionment of particulate matter (PM2.5) in Dammam, Saudi Arabia: Impact of dust storms.

PM1 composition and source apportionment at two sites in Delhi, India, across multiple seasons (2021)
Journal Article
Reyes-Villegas, E., Panda, U., Darbyshire, E., Cash, J. M., Joshi, R., Langford, B., Di Marco, C. F., Mullinger, N. J., Alam, M. S., Crilley, L. R., Rooney, D. J., Acton, W. J. F., Drysdale, W., Nemitz, E., Flynn, M., Voliotis, A., McFiggans, G., Coe, H., Lee, J., Hewitt, C. N., …Allan, J. D. (2021). PM1 composition and source apportionment at two sites in Delhi, India, across multiple seasons. Atmospheric Chemistry and Physics, 21(15), 11655–11667. https://doi.org/10.5194/acp-21-11655-2021

Air pollution in urban environments has been shown to have a negative impact on air quality and human health, particularly in megacities. Over recent decades, Delhi, India, has suffered high atmospheric pollution, with significant particulate matter... Read More about PM1 composition and source apportionment at two sites in Delhi, India, across multiple seasons.

Chemical source profiles of fine particles for five different sources in Delhi (2021)
Journal Article
Hama, S., Kumar, P., Alam, M. S., Rooney, D. J., Bloss, W. J., Shi, Z., Harrison, R. M., Crilley, L. R., Khare, M., & Gupta, S. K. (2021). Chemical source profiles of fine particles for five different sources in Delhi. Chemosphere, 274, Article 129913. https://doi.org/10.1016/j.chemosphere.2021.129913

Increasing emissions from sources such as construction and burning of biomass from crop residues, roadside and municipal solid waste have led to a rapid increase in the atmospheric concentrations of fine particulate matter (≤2.5 μm; PM2.5) over many... Read More about Chemical source profiles of fine particles for five different sources in Delhi.

A comparison of PM₂.₅-bound polycyclic aromatic hydrocarbons in summer Beijing (China) and Delhi (India) (2020)
Journal Article
Elzein, A., Stewart, G. J., Swift, S. J., Nelson, B. S., Crilley, L. R., Alam, M. S., Reyes-Villegas, E., Gadi, R., Harrison, R. M., Hamilton, J. F., & Lewis, A. C. (2020). A comparison of PM₂.₅-bound polycyclic aromatic hydrocarbons in summer Beijing (China) and Delhi (India). Atmospheric Chemistry and Physics, 20(22), 14303-14319. https://doi.org/10.5194/acp-20-14303-2020

Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous pollutants in air, soil, and water and are known to have harmful effects on human health and the environment. The diurnal and nocturnal variations of 17 PAHs in ambient particle-bound PAHs were m... Read More about A comparison of PM₂.₅-bound polycyclic aromatic hydrocarbons in summer Beijing (China) and Delhi (India).