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Shakya Lab

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Publications

(**Undergraduate Student; *Graduate Student)

  1. *Karim, A.S., **Tian, R., Posner, M.A., **Schelin, J., Shakya, K.M. (2026). Exposure to particulate matter, black carbon, and ultrafine particles at Philadelphia subway stations. Atmospheric Environment 376, 122035. https://doi.org/10.1016/j.atmosenv.2026.122035
  2. **Garcia, J.Z., CCATE Environmental Justice Circle, Ali, N., Arango, O., Brady, C., Esquivel-Cote, R., Goldsmith, S.T., Link, H., Lugo, D., Matos, S., McDermott-Levy, R., Shakya, K.M., Smith, D.J. (2025). A Community-Based Participatory Research Program to Assess Community Lead Exposure Risk: Established Research Priorities. Discover Social Science and Health. https://doi.org/10.1007/s44155-025-00344-9.
  3. **McDonough, R., Shakya, K.M. (2025). Trace Metal Contamination in Community Gardens in Pittsburgh, Pennsylvania. Environments, 12(5), 159; https://doi.org/10.3390/environments12050159.
  4. Rai, P., Gauchan, E., Pradhan, R., Shakya, K.M. (2025). Survey of Nepali doctors on the perception of climate change and health effects. The Journal of Climate Change and Health, 23, 100449. https://doi.org/10.1016/j.joclim.2025.100449
  5. *Terry, B., Kremer, P., Goldsmith, S.T., Shakya, K.M. (2024). Land use regression model to predict nitrogen dioxide in the greater Philadelphia area. Atmospheric Pollution Research, 16(1), 102339. https://doi.org/10.1016/j.apr.2024.102339
  6. Shakya, K.M. and Eggler, A. (2024). Air pollution inside Philly’s subways is much worse than on the streets. The Conversation. https://theconversation.com/air-pollution-inside-phillys-subway-is-much-worse-than-on-the-streets-237843. https://doi.org/10.64628/AAI.6jhaduekd
  7. *Karim, A.S., **Malone, M., **Bruno, A., Eggler, A.L., Posner, M., Shakya, K.M. (2024). Assessment of air quality in the Philadelphia, Pennsylvania subway. Journal of Exposure Science & Environmental Epidemiology, 35, 196–204,  https://doi.org/10.1038/s41370-024-00711-9. 
  8. **Scolio, M., **Bohra, C., Kremer, P., Shakya, K.M. (2024). Spatial analysis of intra-urban air pollution disparities through an environmental justice lens: A case study of Philadelphia, PA. Atmosphere, 15, 755. https://doi.org/10.3390/atmos15070755. 
  9. **Carino, H., **Walsh, S., Shakya, K.M. (2024). Long term trend of particulate matter in Philadelphia, Pennsylvania and its association with introduction of environmental policies. Discover Cities, 1, 7. https://doi.org/10.1007/s44327-024-00007-5. 
  10. **Scolio, M., Kremer, P., Zhang, Y., Shakya, K.M. (2024). Spatial-temporal modeling of the relationship between surface temperature and air temperature in metropolitan urban systems. Urban Climate, 55, 101921. https://doi.org/10.1016/j.uclim.2024.101921
  11. **Malone, M., Shakya, K.M. (2024). Trace Metal Contamination in Community Garden Soils across the United States. Sustainability, 16(5), 1831. https://doi.org/10.3390/su16051831. 
  12. *Terry, B., Shakya, K.M. (2024). Monitoring gaseous pollutants using passive sampling in Philadelphia region. Journal of the Air & Waste Management Association, 74 (1), 52-69. https://doi.org/10.1080/10962247.2023.2279733.
  13. **Bassetti, O.G., **McDonough, R.A., Shakya, K.M. (2023). Soil contamination in community gardens of Philadelphia and Pittsburgh, Pennsylvania. Environmental Monitoring and Assessment, 195, 782. https://doi.org/10.1007/s10661-023-11329-z. 
  14. **Sage, L., **Bassetti, O., Johnson, E., Shakya, K., Weston, N. (2023). Assessment of heavy metal contamination in soil and produce of Philadelphia community gardens. Environmental Pollutants and Bioavailability, 35, 1, 2209283. https://doi.org/10.1080/26395940.2023.2209283.
  15. *Cummings, L.E., *Stewart, J.D., Kremer, P., Shakya, K.M. (2021). Predicting citywide distribution of air pollution using mobile monitoring and three-dimensional urban structure. Sustainable Cities and Society, 76, 103510. https://doi.org/10.1016/j.scs.2021.103510.
  16. McDermott-Levy, R., **Scolio, M., Shakya, K.M., Moore, C.  (2021). Factors that influence climate change related mortality in the United States: An integrative review. International Journal of Environmental Research and Public Health, 18, 8220. https://doi.org/10.3390/ijerph18158220.
  17. *Cummings, L.E., *Stewart, J.D., *Reist, R., Shakya, K.M., Kremer, P. (2021). Mobile monitoring of air pollution reveals spatial and temporal variation in an urban landscape. Frontiers in Build Environment, Sec. Urban Science, 7. doi: 10.3389/fbuil.2021.648620. 
  18. **Kellenbenz, K.R., Shakya, K.M. (2021). Spatial and temporal variations in indoor radon concentrations in Pennsylvania, USA from 1988 to 2018. Journal of Environmental Radioactivity 233, 106594. https://doi.org/10.1016/j.jenvrad.2021.106594
  19. *Stewart, J.D. , Kremer, P., Shakya, K.M., **Conway, M., **Saad, A. (2021). Outdoor atmospheric microbial diversity is associated with urban landscape structure and differs from indoor-transit systems as revealed by mobile monitoring and three-dimensional spatial analysis. Frontiers in Ecology and Evolution, 9, 620461. doi: 10.3389/fevo.2021.620461. 
  20. Shakya, K.M., **Saad, A., **Aharonian, A. (2020). Commuter exposure to particulate matter at underground subway stations in Philadelphia. Building and Environment, 186, 107322. https://doi.org/10.1016/j.buildenv.2020.107322
  21. **Conway, M., Shakya, K.M. (mentor), Kremer, P. (2020). Mapping social vulnerability to air pollution in Philadelphia, PA. Veritas: Villanova Research Journal, 2: 122-130. Open Access.  PDF
  22. *Stewart, J.D., Shakya, K.M., Bilinski, T., Wilson, J.W., Ravi, S., Choi, C.S. (2020). Variation of near surface atmosphere microbial communities at an urban and a suburban site in Philadelphia, PA, USA. Science of the Total Environment, 724, 138353. https://doi-org.ezp1.villanova.edu/10.1016/j.scitotenv.2020.138353
  23. Shakya, K.M., Kremer, P., **Henderson, K., **McMahon, M., Peltier, R.E., *Bromberg, S., **Stewart, J. (2019). Mobile monitoring of air and noise pollution in Philadelphia neighborhoods during Summer 2017. Environmental Pollution, 255, 113195. https://doi.org/10.1016/j.envpol.2019.113195
  24. Shakya, K.M., Peltier, R.E., Zhang, Y., Pandey, B.D. (2019). Roadside exposure and inflammation biomarkers among a cohort of traffic police in Kathmandu, Nepal. International Journal of Environmental Research and Public Health, 16(3), 377. https://doi.org/10.3390/ijerph16030377. 
  25. Shakya, K.M., Rupakheti, M., Shahi, A., Maskey, R., Pradhan, B., Panday, A., Puppala, S.P., Lawrence, Peltier, R.E. (2017). Near-road sampling of PM2.5 and BC, and fine-particle chemical components in Kathmandu Valley, Nepal. Atmospheric Chemistry and Physics, 17, 6503-6516. https://doi.org/10.5194/acp-17-6503-2017  
  26. Shakya, K.M., Peltier, R.E., Shrestha, H., Byanju, R.M. (2017). Measurements of TSP, PM10, PM2.5, BC, and PM chemical composition from an urban residential location in Nepal. Atmospheric Pollution Research, 8(6), 1123-1131. https://doi.org/10.1016/j.apr.2017.05.002
  27. Shakya, K.M., Noyes, A., Kallin, R., Peltier, R.E. (2016).Evaluating the efficacy of cloth facemasks in reducing particulate matter exposure. Journal of Exposure Science and Environmental Epidemiology, 27, 352-357. https://doi.org/10.1038/jes.2016.42
  28. Shakya, K.M., Rupakheti, M., Aryal, K., Peltier, R.E. (2016). Respiratory effects of high levels of particulate exposure in a cohort of traffic police in Kathmandu, Nepal. Journal of Occupational and Environmental Medicine. 58(6), e218-e225. DOI: 10.1097/JOM.0000000000000753
  29. Kiros, F., Shakya, K.M., Rupakheti, M., R.M., Regmi, Maharjan, R., Byanju, R.P., Naja, M., Mahata, K., Kathayat, B., Peltier, R.E. (2016). Variability of Anthropogenic Gases: Nitrogen Oxides, Sulfur Dioxide, Ozone and Ammonia in Kathmandu Valley, Nepal. Aerosol and Air Quality Research, 16(12), 3088-3101. https://doi.org/10.4209/aaqr.2015.07.0445
  30. Rutter, A.P., Griffin, R.J., Cevik, B.K., Shakya, K.M., Gong, L., Kim, S., Flynn, J.H., Lefer, B.L. (2015). Sources of air pollution in a region of oil and gas exploration downwind of a large city. Atmospheric Environment, 120, 89-99. https://doi.org/10.1016/j.atmosenv.2015.08.073
  31. Shakya, K.M. and Peltier, R.E. (2015). Non-sulfate sulfur in fine aerosols across the United States: Insight for organosulfate prevalence. Atmospheric Environment, 100: 159-166. https://doi.org/10.1016/j.atmosenv.2014.10.058
  32. Shakya, K.M. and Peltier, R.E. (2013). Investigating missing sources of sulfur at Fairbanks, Alaska. Environmental Science & Technology, 47(16), 9332-9338. https://doi.org/10.1021/es402020b
  33. Shakya, K.M., Liu, S., Takahama, S., Russell, L.M., Keutsch, F.N., Galloway, M.N., Shilling, J.E., Hiranuma, N., Song, C., Kim, H., Paulson, S.E., Pfaffenberger, L., Barmet, P., Slowik, J., Prevot, A.S.H., Dommen, J., Baltensperger, U. (2013). Similarities in STXM-NEXAFS spectra of atmospheric particles and secondary organic aerosol generated from glyoxal, alpha-pinene, isoprene, 1,2,4-trimethylbenzene, and d-limonene. Aerosol Science Technology, 47(5), 543-555. https://doi.org/10.1080/02786826.2013.772950
  34. Ahlm, L., Shakya, K.M., Russell, L.M., Schroder, J.C., Wong, J.P.S., Sjostedt, S.J., Hayden, K.L., Liggio, J., Wentzell, J.J.B., Wiebe, H.A., Mihele, C., Leaitch, W.R., Macdonald, A.M. (2013). Temperature-dependent accumulation mode particles and cloud nuclei concentrations from biogenic sources during WACS 2010. Atmospheric Chemistry and Physics, 13(6), 3393-3407. https://doi.org/10.5194/acp-13-3393-2013
  35. Rutter, A.P., Shakya, K.M., Lehr, R., Schauer, J.J., Griffin, R.J. (2012). Oxidation of gaseous elemental mercury in the presence of secondary organic aerosols. Atmospheric Environment, 59, 86-92. https://doi.org/10.1016/j.atmosenv.2012.05.009
  36. Shakya, K.M., Place, P.F., Griffin, R.J., Talbot, R.W. (2012). Carbonaceous content wand water-soluble organic functionality of atmospheric aerosols at a semi-rural New England location. Journal of Geophysical Research: Atmospheres, 117, D03301, doi: 10.1029/2011JD016113.
    https://doi.org/10.1029/2011JD016113
  37. Shakya, K.M., Louchouarn, P., Griffin, R.J. (2011). Lignin-derived phenols in Houston aerosols: Implications for natural background sources. Environmental Science & Technology, 45(19), 8268-8275. https://doi.org/10.1021/es201668y
  38. Shakya, KM. and Griffin, R.J. (2010). Secondary organic aerosol from photooxidation of polycyclic aromatic hydrocarbons. Environmental Science & Technology, 44(21), 8134-8139. https://doi.org/10.1021/es1019417
  39. Shakya, K.M., Ziemba, L.D., Griffin, R.J (2010). Characteristics and sources of carbonaceous, ionic, and isotopic species of wintertime atmospheric aerosols in Kathmandu Valley, Nepal. Aerosol and Air Quality Research, 10, 219-230. https://doi.org/10.4209/aaqr.2009.10.0068
  40. Makris, K.C., Shakya, K.M., Datta, R., Sarkar, D., Pachanoor, D. (2007). High Uptake of 2,4,6-trinitrotoluene by vetiver grass – Potential for phytoremediation? Environmental Pollution, 146(1), 1-4. https://doi.org/10.1016/j.envpol.2006.06.020
  41. Makris, K.C., Shakya, K.M., Datta, R., Sarkar, D., Pachanoor, D. (2007). Chemically catalyzed uptake of 2,4,6-trinitrotoluene by Vetiveria zizanioides. Environmental Pollution, 148(1), 101-106. https://doi.org/10.1016/j.envpol.2006.10.047
  42. Makris, K.C., Datta, R., Sarkar, D., Shakya, K.M., Pachanoor, D., Das, P. (2007). Chaotropic effects on 2,4,6-trinitrotoluene uptake by wheat (Triticum aestivum). Plant and Soil, 295(1-2), 229-237. https://doi.org/10.1007/s11104-007-9278-5

News

2025

  • ‘It’s hellish now’: EMR fire leaves Camden residents worried about health and contamination. March 5, 2025.  https://whyy.org/articles/emr-fire-camden-health-aftermath/
  • The deadly NE Philly plane crash caused a plume of smoke and a massive crater. Here’s what to know about the environmental impacts. February 10, 2025. https://whyy.org/articles/philly-plane-crash-smoke-environmental-impact/

2024

  • Just how bad is the air you’re breathing while waiting underground for SEPTA’s subways? December 19, 2024. https://www.inquirer.com/transportation/inq2/septa-pollution-study-workers-villanova-20241219.html
  • Air pollution at Philadelphia’s 15th Street subway station ‘considerably higher’ than EPA standard. September 1, 2024.  https://whyy.org/articles/philadelphia-15th-street-subway-station-pollution-study-villanova/
  • New York City subway riders are breathing in hazardous air, study finds. August 7, 2024. https://www.theguardian.com/us-news/article/2024/aug/07/new-york-city-subway-hazardous-air
  • Particulates Matter. https://www1.villanova.edu/vu/magazine/spring-2024/nova-worthy/particulates-matter.html. Spring 2024.
  • EPA sets stricter air emission rules for 3 Philly-area polluters and dozens of others nationwide. April 2024. https://whyy.org/articles/epa-air-pollution-rules-emissions-cancer/
  • New EPA soot standard could bring healthier air to parts of the Philly region. January 2024. https://whyy.org/articles/new-epa-soot-standard-air-quality-pollution/

2023

  • Growing veggies in the city this year? You may want to check your soil. Environmental Health News. 8/14/2023. https://www.ehn.org/non-toxic-gardening-2662701497.html
  • Villanova University Geoscientists Host Philadelphia High School Students Through National Science Foundation Urban Environmental Contamination Grant. Villanova University Media Room. August 2023. https://www1.villanova.edu/university/media/features/villanova-geoscientists-host-local-students-though-grant.html
  • Villanova University Students Participate in BIG EAST Undergraduate Research Poster Symposium.  March 2023. https://www1.villanova.edu/university/media/press-releases/2023/villanova-students-big-east-poster-symposium.html

2022

  • Villanova Scientists Receive NIH Grant to Examine Effects of Subway Air Quality on Public Health.  January 2022. https://www1.villanova.edu/villanova/media/features/scientists-receive-nih-grant-examining-subway-air-quality-effects-and-public-health.html
  • Día Mundial de la Educación Ambiental. January 2022. https://www.impactomedia.com/region/noticias-de-impacto/dia-mundial-de-la-educacion-ambiental/

2021

  • Villanova Launches Environmental Geoscience Program for Philadelphia Students with Help of $399,155 NSF Grant. https://www1.villanova.edu/villanova/artsci/newsevents/2021/1008.html
  • Villanova Receives Interdisciplinary National Science Foundation Grant to Implement Augmented Reality Sandboxes. https://www1.villanova.edu/villanova/media/features/klassner-augmented-reality-sandbox.html
  • Niños trabajando a favor del ambiente. April 2021. https://www.impactomedia.com/bienestar-comun/impacto-verde/ninos-trabajando-a-favor-del-ambiente/

2020

  • The Best Masks for Air Pollution and Wildfire Smoke. 9/24/2020 https://www.openfit.com/the-best-masks-for-air-pollution-and-wildfire-smoke
  • Social distancing will impact air quality in Philly, experts say. 3/27/2020. https://6abc.com/6053390/
  • मास्कले सुरक्षा दिदैन – Sajha Katha EP03 (In Nepali). 2/13/2020. https://www.youtube.com/watch?v=jAZl5y6ZbJQ&t=5s

2019

  • Philly Has an Air Pollution Problem. These Researchers Think Its Neighborhoods May Hold a Solution. https://www1.villanova.edu/villanova/media/features/AirPollutionResearch.html

2017

  • Valley pollution impact as bad as smoking: Experts. March 2017. https://myrepublica.nagariknetwork.com/news/valley-pollution-impact-as-bad-as-smoking-experts-1/
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