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Fluorine surface speciation in South Andean volcanic ashes
(Elsevier Science, 2020-01)
Fresh volcanic ash samples collected during the eruptions of the Hudson (1991), Chaitén (2008), Puyehue (2011), Calbuco (2015) and Copahue (2016) volcanoes were analyzed in order to identify the fluorine (F) bearing phases. ...
Nicosulfuron sorption kinetics and sorption/desorption on volcanic ash-derived soils: poposal of sorption and transport mechanisms
(Elsevier, 2020)
Nicosulfuron sorption/desorption kinetics were studied through batch sorption studies in ten volcanic ash-derived Andisol and Ultisol soils with acidic pH and variable surface charge. Two different kinetic models were used ...
Use of Sludge as Ceramic Materials
(Trans Tech Publications Ltd, 2014)
Sustained effects of volcanic ash on biofilm stoichiometry, enzyme activity and community composition in North- Patagonia streams
(Elsevier, 2018-04-15)
Volcanic eruptions are extreme perturbations that affect ecosystems. These events can also produce persistent effects in the environment for several years after the eruption, with increased concentrations of suspended ...
Reaproveitamento de potássio de cascas de cacau por lixiviação de cinzas e produção de húmus de minhoca
(Universidade Tecnológica Federal do ParanáPonta GrossaBrasilDepartamento Acadêmico de Engenharia QuímicaEngenharia QuímicaUTFPR, 2020-11-03)
Cocoa is a fruit that has three subdivisions: husk, pulp and almonds. The raw material most targeted by the industries that use the fruit are the almonds, and for the extraction of one ton of them, about 6 to 8 tons of ...
Synthesis of coal fly ash zeolite for the catalytic wet peroxide oxidation of Orange II
(Springer Heidelberg, 2019-02-20)
Fly ash, a coal combustion residue produced by Termotasajero in Colombia, has been hydrothermally treated after an alkaline fusion to produce zeolite without addition of silicon or aluminum. The starting material was ...