Characterizing Volcanic Ash Elements from the 2015 Eruptions of Bromo and Raung Volcanoes, Indonesia
Arinto Y.P. Wardoyo 1  
,   Johan A.E. Noor 1  
,   Gereon Elbers 2  
,   Sandra Schmitz 2  
,   Sascha T. Flaig 2  
,   Arif Budianto 1  
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Laboratory of Air Quality and Astro Imaging, Department of Physics, University of Brawijaya, Malang, East Java, Indonesia
FH Aachen University of Applied Sciences, Juelich, Germany
Arinto Y.P. Wardoyo   

Laboratory of Air Quality and Astro Imaging, Physics Department, Brawijaya University, Jl. Veteran, 65145 Malang, Indonesia
Submission date: 2018-08-12
Final revision date: 2018-10-10
Acceptance date: 2018-10-21
Online publication date: 2020-01-23
Publication date: 2020-02-13
Pol. J. Environ. Stud. 2020;29(2):1899–1907
The volcanic eruptions of Mt. Bromo and Mt. Raung in East Java, Indonesia, in 2015 perturbed volcanic materials and affected surface-layer air quality at surrounding locations. During the episodes, the volcanic ash from the eruptions influenced visibility, traffic accidents, flight schedules, and human health. In this research, the volcanic ash particles were collected and characterized by relying on the detail of physical observation. We performed an assessment of the volcanic ash elements to characterize the volcanic ash using two different methods which are aqua regia extracts followed by MP-AES and XRF laboratory test of bulk samples. The analysis results showed that the volcanic ash was mixed of many materials, such as Al, Si, P, K, Ca, Ti, V, Cr, Mn, Fe, Ni, and others. Fe, Si, Ca, and Al were found as the major elements, while the others were the trace elements Ba, Cr, Cu, Mn, P, Mn, Ni, Zn, Sb, Sr, and V with the minor concentrations. XRF analyses showed that Fe dominated the elements of the volcanic ash. The XRF analysis showed that Fe was at 35.40% in Bromo and 43.00% in Raung of the detected elements in bulk material. The results of aqua regia extracts analyzed by MP-AES were 1.80% and 1.70% of Fe element for Bromo and Raung volcanoes, respectively.