Journal ArticleDOI
Aqueous Ammonia Equilibrium Calculations: Effect of pH and Temperature
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A critical evaluation of the literature data on the ammonia–water equilibrium system has been carried out and results of calculations of values of pKa at different temperatures and of percent of NH3 in aqueous ammonia solutions of zero salinity as a function of pH and temperature are presented.Abstract:
The toxicity of ammonia to fishes has been attributed to the un-ionized ammonia chemical species present in aqueous solution Because the percent of total ammonia present as un-ionized ammonia (NH3) is so dependent upon pH and temperature, an exact understanding of the aqueous ammonia equilibrium is important for toxicity studies A critical evaluation of the literature data on the ammonia–water equilibrium system has been carried out Results of calculations of values of pKa at different temperatures and of percent of NH3 in aqueous ammonia solutions of zero salinity as a function of pH and temperature are presentedread more
Citations
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Journal ArticleDOI
Effects of Environmental Sodium Chloride on Percent Hatch, Yolk Utilization, and Survival of Channel Catfish Fry
TL;DR: The results indicate that addition of NaCI to hatchery water supplies can increase production of channel catfish fry, but additional research is needed before this practice can be recommended on a commercial basis.
Journal ArticleDOI
Monitoring oxidative stress, immune response, Nrf2/NF-κB signaling molecules of Rhynchocypris lagowski living in BFT system and exposed to waterborne ammonia.
TL;DR: The results indicated that BFT could enhance growth, antioxidant and immune response and regulate Nrf2 and NF-κB related genes expression in R. lagowski, with most excellent effects in fish given C:N 20:1 group.
Journal ArticleDOI
Complexation of copper in the effluent of a sewage treatment plant and an estimate of its influence on toxicity to coho salmon
TL;DR: In this paper, the cupric ion electrode of the complexing capacity of the effluent from a sewage treatment plant (STPE) averaged 0.300 mg 1 −1, of which 67% was due to compounds of ⩽ 10,000 MW.
Journal ArticleDOI
The distribution of nitrogen species in polluted Onondaga Lake, N.Y., U.S.A.
Carol M. Brooks,Steven W. Effler +1 more
TL;DR: In this paper, the temporal and vertical distributions of four N species, N03−, NO2−, total ammonia (T-NH3), and free ammonia (NH3) are documented for Onondaga Lake, an urban, polluted, hypereutrophic, dimictic, lake that receives a very high load of T-NH 3.
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Evaluation of a trickling biofilter in a recirculating aquaculture system containing channel catfish
Gary E. Miller,George S. Libey +1 more
TL;DR: Water quality was good to excellent when the packed towers contained the medium, and the rate of production was influenced by the combined effect of concentrations of dissolved oxygen, NH 3 N and/or NO 2 − N otherwise considered safe.
References
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Journal ArticleDOI
Acidic dissociation constant of ammonium ion at 0 to 50 C, and the base strength of ammonia
Journal ArticleDOI
The Percent Un-Ionized Ammonia in Aqueous Ammonia Solutions at Different pH Levels and Temperatures
TL;DR: In this article, it was shown that the un-ionized ammonia molecule and not the ammonium ion is the form of the toxicant harmful to fish, and the amount of unionised ammonia in the water was quantified.