title: CO2 laser photoacoustic detection of ammonia emitted by ceramic industries.
abstract: A homemade photoacoustic spectrometer has been constructed for monitoring gas emission from several sources. Numerous air pollutant gases are emitted exhaust of industries, vehicles and power plants. The photoacoustic technique is extremely sensitive and selective in detecting various gases. This work focuses on the gas emitted by the ceramic industry in northern Rio de Janeiro State in Brazil, the ceramic industry plays a remarkable role in the economy activity of this region, in recent years, this region developed into a significant red ceramic complex. The potential impact on the atmospheric environment of the region due to gaseous pollutant emissions from these anthropogenic sources needs to be evaluated. In this work we identified NH3 present in the samples collected in the kiln of a ceramic plant, in the concentration range of 33-52 ppmV. The ammonia gas present in our collected samples might come from the excess nitrogen in the manure soil from where the ceramic material was extracted. This soil was used for the sugarcane culture which is another important economic activity of this region.
authors.affiliation: Laboratório de Ciências Físicas, Centro de Ciência e Tecnologia, Universidade Estadual do Norte Fluminense, Av. Alberto Lamego 2000, Campos dos Goytacazes-RJ, RJ, Brazil. sthel@uenf.br
authors.forename: M S
authors.initials: MS
authors.lastname: Sthel
authors.forename: D U
authors.initials: DU
authors.lastname: Schramm
authors.forename: G R
authors.initials: GR
authors.lastname: Lima
authors.forename: L
authors.initials: L
authors.lastname: Carneiro
authors.forename: R T
authors.initials: RT
authors.lastname: Faria
authors.forename: M P P
authors.initials: MP
authors.lastname: Castro
authors.forename: J
authors.initials: J
authors.lastname: Alexandre
authors.forename: R
authors.initials: R
authors.lastname: Toledo
authors.forename: M G
authors.initials: MG
authors.lastname: Silva
authors.forename: H
authors.initials: H
authors.lastname: Vargas
mesh_terms: D000042:Absorption; D000162:Acoustics / Q000295:instrumentation; D000641:Ammonia / Q000032:analysis*; D002138:Calibration; D002245:Carbon Dioxide / Q000737:chemistry*; D002516:Ceramics / Q000737:chemistry*; D005030:Ethylenes / Q000737:chemistry; D007220:Industrial Waste / Q000032:analysis*; D007834:Lasers; D008027:Light; D057230:Limit of Detection; D013057:Spectrum Analysis; D013696:Temperature
chemical_list: D005030:Ethylenes; D007220:Industrial Waste; D002245:Carbon Dioxide; D000641:Ammonia; C036216:ethylene