Title of article :
Ammonia traces detection based on photoacoustic spectroscopy for evaluating ammonia volatization from natural zeolites at typical crop field temperature
Author/Authors :
Walmir Maximo; Baptista Filho، نويسنده , , Milton and Riter، نويسنده , , Heitor Gonçalves and da Silva، نويسنده , , Marcelo Gomes and Luna، نويسنده , , Fernando J. and Werneck، نويسنده , , Carlos Guarino and Rech، نويسنده , , Ionل and Polidoro، نويسنده , , José Carlos and Mello Monte، نويسنده , , Marisa Bezerra and Souza-Barros، نويسنده , , Fernando and Miklos، نويسنده , , Andras and Var، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2011
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
Journal title :
Sensors and Actuators B: Chemical
Journal title :
Sensors and Actuators B: Chemical
