Physicochemical Properties and Bioreactivity of Sub-10 μm Geogenic Particles: Comparison of Volcanic Ash and Desert Dust.

ABSTRACT: Exposure to ambient particulate matter (PM) with an aerodynamic diameter of <10 μm (PM₁₀) is a well-established health hazard. There is increasing evidence that geogenic (Earth-derived) particles can induce adverse biological effects upon inhalation, though there is high variability in particle bioreactivity that is associated with particle source and physicochemical properties. In this study, we investigated physicochemical properties and biological reactivity of volcanic ash from the April 2021 eruption of La Soufrière volcano, St. Vincent, and two desert dust samples: a standardized test dust from Arizona and an aeolian Gobi Desert dust sampled in China. We determined particle size, morphology, mineralogy, surface texture and chemistry in sub-10 μm material to investigate ass

SUBMITTER: Tomasek I 

PROVIDER: S-EPMC11711107 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature