Topic
Ammonia
About: Ammonia is a research topic. Over the lifetime, 16217 publications have been published within this topic receiving 271940 citations. The topic is also known as: NH3 & azane.
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TL;DR: In this article, the degradation of nitrogen containing organic compounds was investigated using the Photo-Fenton method for wastewater treatment and the results showed that under specified conditions the substances could be decomposed and, as expected, aromatic compounds showed a higher degree and rate of degradation than aliphatic ones.
80 citations
TL;DR: In this paper, noble metal catalysts on activated carbon (AC) (Pt/AC and Ru/AC) and base-metal catalysts were developed and examined for the simultaneous removal of organic pollutants and ammonia from wastewater using wet air oxidation (WAO) process in the liquid phase.
80 citations
TL;DR: Results agree with earlier laboratory studies in that ammonium sulfate loses considerably more ammonia than ammonium nitrate when applied to the surface of a calcareous clay soil.
Abstract: Many laboratory experiments have been conducted to study ammonia volatilization from N fertilizers, but few experiments have been conducted under field conditions. The objective of this study was to evaluate ammonia volatilization in the field from ammonium sulfate and ammonium nitrate applied to the surface of a calcareous soil, Houston Black Clay, that belongs to the fine, montmorillonitic, thermic family of Udic Pellusterts. Volatilization was evaluated indirectly by measuring N uptake by Coastal bermudagrass (Cynodon dactylon L.) and directly by measuring ammonia as it volatilized. In the field plot study, estimated losses ranged from 3 to 10% of the applied N for ammonium nitrate, from 36 to 45% of the applied N for pelleted ammonium sulfate, and from 25 to 55% of the applied N for liquid ammonium sulfate at rates of 140 and 280 kg N/ha. Direct measurements of ammonia losses from pelleted ammonium sulfate were 47, 43, 59, and 50% of the applied N in late summer, 1975, and 39, 30, 27, and 35% of the applied N in spring, 1976, at rates of 33, 66, 140, and 280 kg N/ ha. The lower loss of ammonia in the spring was apparently in response to lower soil temperatures at that time. Consistent diurnal fluctuations in ammonia losses occurred at both times. These fluctuations corresponded closely with daily fluctuations in the atmospheric relative humidity. These results agree with earlier laboratory studies in that ammonium sulfate loses considerably more ammonia than ammonium nitrate when applied to the surface of a calcareous clay soil.
80 citations
TL;DR: The rate of formation of ammonium sulphate in water drops exposed to air containing known concentrations of gaseous sulphur dioxide and ammonia has been measured as discussed by the authors, and the mass of sulphate formed is proportional to the product of the surface area of the drops and the time of exposure.
Abstract: The rate of formation of ammonium sulphate in water drops exposed to air containing known concentrations of gaseous sulphur dioxide and ammonia has been measured. The mass of sulphate formed is proportional to the product of the surface area of the drops and the time of exposure. Extrapolation of the laboratory results to the atmosphere suggests that the large condensation nuclei 0·2 μ < r < 1 μ of ammonium sulphate, found by Junge to be abundant in industrially polluted air, are formed by the absorption of SO2 and NH3 in cloud and fog droplets.
80 citations
80 citations