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Ammonia traces detection based on photoacoustic spectroscopy for evaluating ammonia volatization from natural zeolites at typical crop field temperature |
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| Authors: | Milton Baptista-FilhoAuthor VitaeHeitor Gonç alves RiterAuthor Vitae,Marcelo Gomes da SilvaAuthor Vitae,Fernando J. LunaAuthor VitaeCarlos Guarino WerneckAuthor Vitae,Ioná RechAuthor VitaeJosé Carlos PolidoroAuthor Vitae,Marisa Bezerra Mello MonteAuthor VitaeFernando Souza-BarrosAuthor Vitae,Andras MiklosAuthor VitaeHelion VargasAuthor Vitae |
| Affiliation: | a Centro de Ciência e Tecnologia, UENF, Campos dos Goytacazes, Brazil b Embrapa Solos, CNPS, Rio de Janeiro, Brazil c Centro de Tecnologia Mineral, Rio de Janeiro, Brazil d Instituto de Física, UFRJ, Rio de Janeiro, Brazil e Musikalische Akustik und Photoakustik Gruppe, Fraunhofer Institut für Bauphysik, Stuttgart, Germany |
| Abstract: | A Brazilian sedimentary zeolite-containing microporous material was characterized by determining its physical and chemical properties (surface area, pore volume, dinitrogen and ammonia desorption rates, oxide composition, and acid site characterization), and compared with two commercial natural zeolites. The characterization of these materials was performed using N2 adsorption, X-ray fluorescence spectroscopy and temperature programmed desorption (TPD) techniques. Using photoacoustic spectroscopy, the performance of these microporous materials in the adsorption and delayed desorption of nitrogen-containing fertilizers was studied by monitoring the ammonia emission rate after their treatment with ammonium sulfate. Ammonia desorption curves were recorded under 30 °C and 60 °C, aiming to reproduce typical Brazilian cropfield temperature conditions. |
| Keywords: | Natural zeolite Fertilizer Photoacoustic spectroscopy Ammonium sulfate Ammonia Ion exchange |
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