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Fig. 6 | Environmental Health

Fig. 6

From: Assessment of the potential respiratory hazard of volcanic ash from future Icelandic eruptions: a study of archived basaltic to rhyolitic ash samples

Fig. 6

Comparison of surface reactivity for ground and un-ground volcanic ash samples. Production of hydroxyl radicals (HO•) was measured by spin-trapping and electron paramagnetic resonance after 30 min through replication of the iron-catalyzed Fenton reaction. Grinding was intended to restore the sample surface in order to represent HO• production from freshly collected samples. Data are presented per unit surface area. Error bars represent standard error (n = 3)

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Environmental Health

ISSN: 1476-069X