Results 221 to 230 of about 246,701 (266)

The Chemical Composition of Precipitation in Madrid

Water, Air, and Soil Pollution, 2003
The present study examines the chemical characteristics of first-fraction precipitation samples collected over a period of one year in Madrid, and patterns of temporal and spatial variation observed in their composition. One hundred and sixty-four samples of wet precipitation collected on an event basis were analysed for anions, cations, pH and ...
C. Hontoria, A. Saa, J. Almorox, L. Cuadra, A. Sánchez, J. M. Gascó   +5 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 ...
Ridder, TB, Brinkman, FJJ, Reijnders, HFRrivm   +2 more
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Chemical Control of Struvite Precipitation

Journal of Environmental Engineering, 2003
The control of struvite precipitation was investigated using a range of chemical inhibitors and chelating agents. Initial experiments investigated the mass of struvite that precipitated on jar tester impellers used to mix anaerobically digested sludge liquors. Mixing the liquors resulted in degassing of CO2 increasing the pH from below 7 to above 8. It
James D. Doyle, Kath Oldring, John Churchley, Colin Price, Simon A. Parsons   +4 more
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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.
Yin-Nan Lee, Ji Shen, Paul J. Klotz
openaire   +1 more source

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.
Cláudia Telles, Benatti, Célia Regina Granhen, Tavares, Ervim, Lenzi   +2 more
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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, P R, Salve, R J, Krupadam, A, Bansiwal, S, Shastry, S R, Wate   +5 more
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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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Precipitation in star sapphire III. Chemical effects accompanying precipitation

Philosophical Magazine A, 1980
Abstract Large prismatic dislocation loops, of interstitial character and with 1/3 〈1011〉 Burgers vectors are observed to lie on basal planes in the sapphire matrix around rutile needle precipitates in star sapphire. The loops climb away from the precipitate-matrix interface during ageing, and contain the material that has ‘plated out’ during ...
D. S. Phillips, T. E. Mitchell, A. H. Heuer   +2 more
openaire   +1 more source

Factors affecting the chemical composition of precipitation in Syria

Environmental Science and Pollution Research, 2020
Concentrations of the major ions (Ca2+, Mg2+, Na+, K+, NH4+, Cl-, HCO3-, SO42- and NO3-), pH and electrical conductivity (EC) values in the rainwater (RW) samples at 16 stations in Syria were determined for characterizing the principal factors affecting the chemical composition of precipitation (P) in this country. Collection of the RW samples was made
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Coagulation and sedimentation in chemical precipitation of wastewaters

Water Research, 1983
Abstract The influence of different pollutants on coagulation and sedimentation in chemical treatment for tertiary phosphate removal was investigated in a model system. Phosphorus content and alkalinity resembled that of an effluent from biological treatment. Several pollutants inhibited coagulation and sedimentation.
J LEBELL, P STENIUS, C AXBERG
openaire   +1 more source