Assessing the biological reactivity of organic compounds on volcanic ash: implications for human health hazard


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Authors
Tomašek, Ines 
Damby, David E 
Andronico, Daniele 
Baxter, Peter J 
Boonen, Imke 
Abstract

jats:titleAbstract</jats:title>jats:pExposure to volcanic ash is a long-standing health concern for people living near active volcanoes and in distal urban areas. During transport and deposition, ash is subjected to various physicochemical processes that may change its surface composition and, consequently, bioreactivity. One such process is the interaction with anthropogenic pollutants; however, the potential for adsorbed, deleterious organic compounds to directly impact human health is unknown. We use an in vitro bioanalytical approach to screen for the presence of organic compounds of toxicological concern on ash surfaces and assess their biological potency. These compounds include polycyclic aromatic hydrocarbons (PAHs), polychlorinated dibenzo-jats:italicp</jats:italic>-dioxins and dibenzofurans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (dlPCBs). Analysis of ash collected in or near urbanised areas at five active volcanoes across the world (Etna, Italy; Fuego, Guatemala; Kelud, Indonesia; Sakurajima, Japan; Tungurahua, Ecuador) using the bioassay inferred the presence of such compounds on all samples. A relatively low response to PCDD/Fs and the absence of a dlPCBs response in the bioassay suggest that the measured activity is dominated by PAHs and PAH-like compounds. This study is the first to demonstrate a biological potency of organic pollutants associated with volcanic ash particles. According to our estimations, they are present in quantities below recommended exposure limits and likely pose a low direct concern for human health.</jats:p>

Description

Funder: VUB Strategic Research Program

Keywords
37 Earth Sciences, 3703 Geochemistry, 3705 Geology, Clinical Research
Journal Title
Bulletin of Volcanology
Conference Name
Journal ISSN
0258-8900
1432-0819
Volume Title
83
Publisher
Springer Science and Business Media LLC
Sponsorship
Research Foundation Flanders (FWOKN299)
FP7 Marie Sklodowska-Curie Actions Initial Training Network (607905)