Respiratory deposition of particulate matter in Delhi: a five-year assessment of exposure patterns and health risks.

ABSTRACT: Air pollution poses a major health risk globally and is a leading cause of premature mortality. This study evaluates respiratory deposition and health impacts of particulate matter (PM₁₀ and PM_2.5) in Delhi, India, from 2019 to 2023. Using data from continuous air quality monitoring, we analysed daily and seasonal pollutant variations, with emphasis on Diwali and COVID-19 lockdown periods. PM₁₀ and PM_2.5 concentrations exceeded national and WHO guidelines on most days, with peak values of 826.7 µg/m³ (PM₁₀) and 750.5 µg/m³ (PM_2.5). The higher respiratory deposition doses (RDD) occurred in evening daily commuter periods, with PM_2.5 and PM₁₀ RDD values up to 39% and 23% higher than in the morning period,

SUBMITTER: Singh AK 

PROVIDER: S-EPMC12663435 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature