Results 311 to 320 of about 714,258 (351)

Inhomogeneous precipitation patterns in a chemical wave

Physics Letters A, 1994
Abstract Inhomogeneous BaSO 4 -precipitation patterns are observed in the travelling wave generated in the bistable chlorite-thioureabarium chloride reaction system. At the wave-front SO 2− 4 is formed and detected as BaSO 4 which precipitates inhomogeneously in the region behind the front.
Marcus J. B. Hauser, Reuben H. Simoyi
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Chemical equilibrium: VIII. Precipitates

Journal of Chemical Education, 1991
The final article in a series (see previous months this year): This article focuses on ionic precipitates in water and how buffered solutions allow easier calculation of solubilities.
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Chemical Composition of Precipitation at Long Island, NY

Water, Air, and Soil Pollution, 1986
Chemical analyses were performed on 387 sequential precipitation samples, both rain and snow, collected at Brookhaven National Laboratory, Long Island, New York, on 96 different days during the period from October 1983 to June 1985. The collection time for each individual sample was typically 30 min.
Ji Shen, Yin-Nan Lee, Paul J. Klotz
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Mass transfer with chemical reaction and precipitation

Chemical Engineering Science, 1991
Precipitation involving three steps, namely gas-liquid mass transfer, chemical reaction and crystallization, is analysed in terms of the coupled equations for the film theory of gas-liquid mass transfer with chemical reaction and the mass and population balances of crystallization.
Shun Wachi, Alan G. Jones
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Effects of CEOR Chemicals on Asphaltene Precipitation

SPE Annual Technical Conference and Exhibition, 2018
Abstract Enhanced oil recovery methods are appealing to increase oil recovery from reservoirs due to market pressures in times of lower oil price. Chemical enhanced oil recovery (cEOR) methods such as ASP involve the use of alkali, surfactant, and polymer, to create an ultralow interfacial tension (IFT) between microemulsion and oil ...
Heba Sana, Huda Al-Enezi, Morgan Curren, Mohammed Taha Al-Murayri, Ali Qubian, Stephanie Adkins, Mojdeh Delshad, Anton Kaiser   +7 more
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Chemical composition of precipitation at background level

Atmospheric Research, 2010
Abstract Chemical composition of precipitation collected from a rural forest station near Bhubaneswar in the east coast of India during 2005–2007 was studied. The rainwater and dust-fall washings were collected through a wet-only collector and a bulk collector placed together and the second bulk collector located 500 m apart in the same locality. NH4+
S.N. Das, Gautam Roy Chaudhury, Ruby Das, Namrata Das   +3 more
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Sulfate removal from waste chemicals by precipitation

Journal of Environmental Management, 2009
Chemical oxidation using Fenton's reagent has proven to be a viable alternative to the oxidative destruction of organic pollutants in mixed waste chemicals, but the sulfate concentration in the treated liquor was still above the acceptable limits for effluent discharge.
Célia Regina Granhen Tavares, Cláudia Telles Benatti, Ervim Lenzi   +2 more
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Chemical Composition of the Precipitation Over the Netherlands

1981
Abstract The chemical composition of precipitation may have a great influence on the quality of ground water. In the Netherlands precipitation is collected on several sampling sites which are homogeneously distributed over the country. As an example maps with isolines of the ammonium, chloride, sulphate and nitrate content of precipitation collected ...
T.B Ridder, H.F.R. Reijnders, F.J.J. Brinkmann   +2 more
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Sampling and physico-chemical analysis of precipitation: a review

Environmental Pollution, 2002
Wet deposition is one of two processes governing the transfer of beneficial and toxic chemicals from the atmosphere on to surfaces. Since the early 1970s, numerous investigators have sampled and analyzed precipitation for their chemical constituents, in the context of "acidic rain" and related atmospheric processes.
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Chemical Composition of Precipitation in the Coastal Environment of India

Bulletin of Environmental Contamination and Toxicology, 2010
The present study investigated the chemical composition of precipitation at Comba, Madgaon, South Goa during southwest monsoon. The rainwater samples were collected on event basis during June-September 2008 and were analyzed for pH, major anions F, Cl, NO(3), SO(4)) and cations (Ca, Mg, Na, K, NH(4)).
T. Gobre, Amit Bansiwal, Reddithota J. Krupadam, P. R. Salve, Sunita Shastry, Satish R. Wate   +5 more
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