Spatiotemporal variations, photochemical characteristics, health risk assessment and mid pandemic changes of ambient BTEX in a west Asian metropolis.

ABSTRACT: This study examined the concentration of BTEX in Tehran from 2018 to 2020 in five monitoring stations with different backgrounds, which has been accomplished using the combination of passive sampling and GC-FID method. The total concentration of BTEX was estimated to be 65.39 (µg/m³), with a higher average concentration in 2019-2020 (77.79 µg/m³) compared to 2018-2019 (53.48 µg/m³) due to the leaping concentration of Toluene in the pandemic era. Despite a Benzene concentration decline in recent years, the average annual concentration of Benzene (5.66 µg/m³) at five stations remained higher than the EU commission and India standards (5 µg/m³) as well as Japan and Iraq thresholds (3 µg/m³). Toluene dominated other species in t

SUBMITTER: Dehhaghi S 

PROVIDER: S-EPMC10218775 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature