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Piw Das,김기현,Jae-Hwan Sa,배위섭,김조천,전의찬 한국지질과학협의회 2008 Geosciences Journal Vol.12 No.2
In the present study, ammonia (NH3) and nitric oxide (NO) emissions were measured by the dynamic flux chamber (DFC) method from a cropland of Chinese cabbage over a one and a half month period (September-October, 2006). By applying a combination of three treatment (T) types (comprising different proportions of manure, urea, and NPK fertilizer) to the crop field, the effects of such treatments on emission flux were assessed in relation to the amount and type of fertilizer. The magnitude of NH3 emission (g m-2 h-1) varied in the following order: T2 (4,067), T1 (2,263) and T3 (738). NO fluxes (g m-2 h-1) also followed the same descending order of T2 (898) > T1 (477) > T3 (81). The possible effects of soil pH on NH3 fluxes were detected, as they concurrently exhibited a gradual and periodic change during the experimental period. Likewise, temperature was also found to have significant effect on NH3 and NO emission behavior. The results of the present work confirm that the application of fertilizer, when tested in the form of diverse treatment types, affected the emission of NH3 and NO in fertilized field soils at varying degrees.
A Review on the Emission Sources of Ammonia and the Factors Affecting Its Loss
Piw Das,Jae-Hwan Sa,D.S. Kim,K.H. Kim,E.C. Jeon 한국대기환경학회 2007 한국대기환경학회지 Vol.23 No.E2
Among all the nitrogen species present in the atmosphere, ammonia forms a considerable portion along with the nitrogen oxides. The major sources of atmospheric ammonia are animal feedlot operations including emission from excreta of domestic animals and agricultural activities, followed by emission from synthetic fertilizers, biomass burning and to some lesser extent, fossil fuel combustion. Ammonia emission factor, expressed as the weight of ammonia per unit weight, volume, or duration of the activity emitting it, is generally used in developing emission estimates for emission inventories. The factors determining ammonia loss from soil or from manures are the temperature, pH, humidity, precipitation and the velocity of wind above it.
A Review on the Sampling and Analytical Methods for Ammonia in Air
Piw Das,김기현,J-H. Sa,J.C.Kim,S.R.Lee,E-C.Jeon 한국지구과학회 2007 韓國地球科學會誌 Vol.28 No.5
The quantification of ammonia concentrations has received a lot of scientific attention. Numerous devices forthe quantification of NH3 in the ambient air have been developed to provide more technical possibilities for research inabating NH3 emission from various source processes. For the proper quantification of NH3, a number of samplingmethods have been discussed by grouping them into different categories based on the principle of functioning. In general,active samplers employ pumps to draw air in, while passive samplers are exposed to air over a certain period of time toobtain integrated signature of NH3. In case of the former, impingers and absorption flasks can be employedsimultaneously with suitable absorbents to capture NH3 passing through them. The methods of analysis include both in-situ and laboratory determination. In the laboratory, colorimetric or ion chromatographic methods are generally used for itsbe grouped according to their principle of operation. These analyzers may use the principle of spectroscopy (e.g. DOAS),photoacousticics (e.g. photoacoustic monitor) or Chemiluminescence (NOx analyzer). The automated annular denudersampling system with on-line analyzer is also suitable for continuous monitoring of ammonia in air.......... ammonia emission, sampling, analysis, real time analyzers
A Review on the Emission Sources of Ammonia and the Factors Affecting Its Loss
Das, Piw,Sa, Jae-Hwan,Kim, D.S.,Kim, K.H.,Jeon, E.C. Korean Society for Atmospheric Environment 2007 한국대기환경학회지 Vol.23 No.E2
Among all the nitrogen species present in the atmosphere, ammonia forms a considerable portion along with the nitrogen oxides. The major sources of atmospheric ammonia are animal feedlot operations including emission from excreta of domestic animals and agricultural activities, followed by emission from synthetic fertilizers, biomass burning and to some lesser extent, fossil fuel combustion. Ammonia emission factor, expressed as the weight of ammonia per unit weight, volume, or duration of the activity emitting it, is generally used in developing emission estimates for emission inventories. The factors determining ammonia loss from soil or from manures are the temperature, pH, humidity, precipitation and the velocity of wind above it.