Particulate black carbon mass concentrations and the episodic source identification driven by atmospheric blocking effects in Astana, Kazakhstan

The Science of The Total Environment, Год журнала: 2024, Номер 939, С. 173581 - 173581

Опубликована: Май 27, 2024

Black carbon (BC) is a component of fine particulate matter (PM

Язык: Английский

Influence of Relative Humidity and Aging on Morphology and Chemical Composition on Biomass Burning Particle

Aerosol and Air Quality Research, Год журнала: 2024, Номер 24(6), С. 230234 - 230234

Опубликована: Янв. 1, 2024

Agricultural waste burning is a major source of fine particulate matter (FPM), which remains in long-term suspension the atmosphere during aging processes. This research studied changes size, morphology, and chemical composition FPM produced from rice straw sugarcane leaf effects relative humidity (RH) on process. The was measured using scanning mobility particle sizer mass collected for morphological (transmission electron microscopy) (organic elemental carbon, water-soluble ions) analyses 3, 6, 9 h aging. geometric mean diameter (GMDN) biomass were 95 ± 4 nm (Aitken mode) 133 40 (accumulation mode). changed non-uniform aggregate shapes fresh particles into chain aggregates h-aged particles. dominant components OC2, OC3, NO3–, Na+, K+ under low RH condition (60%). Under high (90%), had larger GMDN significant influence its as observed coated spherical or agglomerated shapes. results showed that process, RH, duration important factors affecting shape, aged

Язык: Английский

Quantifying the Impact of Haze and Normal Air Quality on Urban Environments: A Study of Diurnal Variation, Source Apportionment, and Correlation

Water Air & Soil Pollution, Год журнала: 2024, Номер 235(12)

Опубликована: Окт. 26, 2024

Язык: Английский