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Efficient removal of Cr(VI) contaminant using recoverable silica from volcanic ash as natural adsorbent: Synthesis and activity in the mechanism and kinetic adsorption. [PDF]
HeliyonAlharissa EZ +4 more
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Construction and Building Materials, 2019
Abstract This study assesses the replacement of low reactive volcanic ash by ashes of an agro-waste matter (cassava peel) within the range of 0–30% by mass in geopolymer synthesis. Gradual replacement of volcanic ash decreases the initial setting time and increases the compressive strength to about 64 and 733% respectively.
J. Baenla +3 more
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Abstract This study assesses the replacement of low reactive volcanic ash by ashes of an agro-waste matter (cassava peel) within the range of 0–30% by mass in geopolymer synthesis. Gradual replacement of volcanic ash decreases the initial setting time and increases the compressive strength to about 64 and 733% respectively.
J. Baenla +3 more
exaly +2 more sources
Journal of Volcanology and Geothermal Research, 2003 Abstract Explosive volcanic eruptions are the result of intensive magma and rock fragmentation, and they produce volcanic ash, which consists of ...
Zimanowski B +3 more
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2022
Volcanic ash (VA) is a natural resource whose use in cementitious materials has been extensively studied in the last thirty years. The pozzolanic activity makes the volcanic product suitable for use as supplementary cementitious material in concrete. However not all ashes possess this reactivity in their natural state.
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Volcanic ash (VA) is a natural resource whose use in cementitious materials has been extensively studied in the last thirty years. The pozzolanic activity makes the volcanic product suitable for use as supplementary cementitious material in concrete. However not all ashes possess this reactivity in their natural state.
openaire +1 more source
Interaction of cyanobacteria with volcanic ashes
Microbiology, 2013Capacity for growth in water suspensions of volcanic ashes was shown for two oscillatorian cyanobacterial isolates from different environments. Growth dynamics depended on the physicochemical characteristics of the ashes and on pH of the medium. During cyanobacterial growth, some elements were leached, which either stimulated or inhibited growth. These
L M, Gerasimenko +3 more
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Visualization of volcanic ash clouds
Proceedings Visualization '94, 1995Ash clouds from a volcanic eruption-invisible to radar and nearly indistinguishable from weather clouds-pose a serious hazard to aviation safety. This article describes a system developed by the Alaska Volcano Observatory and the Arctic Region Supercomputing Center for predicting and visualizing the movement of ash clouds.
Mitchell Roth, Rick Guritz
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Volcanic ash and human complement
Life Sciences, 1981Abstract Volcanic ash shows slight conversion of C3 with little effect on hemolytic complement in vitro . No conversion of the alternative pathway component Factor B was noted. Complement activation should play only a minor role in any acute respiratory response to inhaled ash.
S A, Olenchock, J C, Mull
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Eyjafjallajökull volcanic ash in southern Italy
Atmospheric Environment, 2012PM2.5 in situ measurements were performed at the Istituto di Metodologie per l'Analisi Ambientale of the National Research Council of Italy (CNR-IMAA, Tito Scalo - Southern Italy) beginning 20 April 2010, the date when the Eyjafjallajokull volcanic ash plume first arrived over Southern Italy.
Lettino A +5 more
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Smithsonian Contributions to the Earth Sciences, 1974
Volcanic ash samples collected from a variety of recent eruptions were studied, using petrography, chemical analyses, and scanning electron microscopy to characterize each ash type and to relate ash morphology to magma composition and eruption type. The ashes are best placed into two broad genetic categories: magmatic and hydrovolcanic (phreatomagmatic)
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Volcanic ash samples collected from a variety of recent eruptions were studied, using petrography, chemical analyses, and scanning electron microscopy to characterize each ash type and to relate ash morphology to magma composition and eruption type. The ashes are best placed into two broad genetic categories: magmatic and hydrovolcanic (phreatomagmatic)
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Visible volcanic ash: Setting the limit or not?
2013 IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC), 2013After the prolonged disruption to aviation caused by volcanic ash injected in atmosphere via volcano Eyjafjallajokull (Iceland) in April and May 2010 aviation society in Europe established the system of three volcanic ash concentration zones (low, medium and high) based on correlation between concentration level and safety and allowed flight operations
Ruzica Vujasinovic, Klaus Sievers
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