... from a dry scrubber unit designed to control air pollutants. The dry scrubber ash contains ammonia, and ventilation during mine stabilization can become a major issue. An abandoned room and pillar limestone mine in Sugar Creek, Missouri, which is owned by Lafarge North America, Inc. (Lafarge), is being...

... of zinc in the five-nation study is presented. atmospheric corrosion mechanism tropical sulfur dioxide ammonia gaseous absorption particulate moisture films Ivan S. Cole~ Mechanisms of Atmospheric Corrosion in Tropical Environments Reference: Cole, I. S., "Mechanisms of Atmospheric...

... Stress corrosion crack growth of carbon steel in anhydroi ammonia has been studied at both ambient temperature and at −33 %C. This has resulted in the development of a crack growth model where tl crack depth is predicted to be proportional to the square of the stress intensity factor...

... Ammonia is the predominant nitrogen-containing species formed during the pyrolysis of oil shale. An on-line method of determining ammonia was developed to study kinetics and chemistry of formation and evolution. While fragmentation of water interferes with electron ionization mass spectrometry...

... metals and chlorinated hydrocarbon pesticides, were measured in the sediments; of the parameters measured, only ammonia was released in sufficient amounts to potentially cause acute lethality in the test waters associated with the sediments. Recent review of the data showed that there is a relationship...

... ammonia was the primary toxic component of the effluent. Data in this case study, from the suite of methods developed (or modified) at EPA's Narragansett Laboratory, appear suitable for the derivation of toxicity-based National Pollutant Discharge Elimination System permits for the marine environment...

... In order to determine the efficacy of using data from 96-h acute bioassays for predicting toxicity associated with shorter exposure periods, a series of static, dynamic, and plug-flow bioassays were performed using bluegill as test organisms. Test chemicals included acrylonitrile, ammonia...

... were generally more toxic to mysids ( Mysidopsis bahia ) than were the liquid phase sludges. Evidence to support the hypothesis that ammonia may be the major contributor to overall toxicity of the sewage sludges tested is presented and discussed. acute toxicity Mysidopsis sewage sludge...

... A short-term, intensive study has been conducted on the potential impact of the chlorine, and to a lesser extent the ammonia and nitrite, associated with the domestic wastewater discharge from the city of Pueblo, Colo. on the water quality (beneficial uses) of the Arkansas River downstream from...

... A study was conducted to determine water quality criteria for ammonia and total residual chlorine (TRC) for the protection of aquatic life in two streams in Johnson County, Kan. The test streams selected were Mill and Cedar Creeks. The parallel streams flow into the Kansas River and share...

... and ammonia interferences are eliminated, the conductivity is measured at constant temperature, and increased sensitivity to anions is attained by measuring the conductivity of anions in the acidic and more conductive form. Design changes in this equipment have made possible more accurate conductivity...

... effluent and ammonia concentration. Statistical analyses ( P = 0.05) indicated an MAEC range of 18 to 32 percent treated effluent. The corresponding un-ionized and total ammonia concentrations were, respectively, 0.2 to 0.3 mg/litre and 2.3 to 3.2 mg/litre. In light of the current EPA water quality...

... for fish life, (2) identification of the relationships between fish populations and ammonia and chlorine in sewage discharges, and (3) development of a continuous stress function to evaluate the responses of aquatic communities to environmental and pollutional factors. The projects have resulted in useful...

... gradients of 0.5 mg of ammonia-nitrogen per litre (approximately 4.0 µg/litre of unionized ammonia) produced ( a ) a temporary exploratory response in which the fish positioned themselves in or near the gradient, ( b ) a slight increase in activity, and ( c ) a slight increase in turn sizes. Higher...

... of the test severity, discretion must be exercised in translating susceptibility to SCC observed in the laboratory to anticipated performance in service. stress corrosion cracking hydrogen-induced cracking strain rate steels ammonia nitrate caustic carbonate-bicarbonate C. D. Kim ~ and B. E...

..., and dimethyl sulfide. The effect of repeated temperature changes on the repeatability of permeation rates was determined for permeation tubes filled with ammonia, nitrogen dioxide, and sulfur compounds. A two-stage process to equilibrium was observed for tubes made of FEP Teflon. Permeation through TFE Teflon...

... Two methods for determining the forms of ammonia nitrogen in water are described. A univalent cation electrode can be used to detect ionized ammonium if potassium and sodium concentrations of the solution are constant. At pH values less than 7.5 this will correspond to the total ammonia...

... cracking copper alloys external stresses residual stresses brasses ammonia embrittlement failure plastic deformation transgranular corrosion intergranular corrosion D. H. Thompson ^ Stress Corrosion Cracking of Copper Metals REFERENCE: Thompson, D.H., "Stress Corrosion Cracking of Copper...

... and in ammonia. Nitrite and nitrate increased slightly. Bacteria and combined nitrogen decreased rapidly after the initial rise. In the stream with the inorganic nitrogen medium, about half of the nitrate disappeared in two weeks, and nitrate was undetectable after the third week. Bacterial counts were...