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Fundamentals of Chemical Coagulation and Precipitation
2021Chemical treatment is considered as a useful tool for (a) pretreatment of harmful wastes, (b) early removal of undissolved precipitating substances, (c) reduction of load fluctuations, (d) combating bulking activated sludge, (e) polishing effluents, and (f) phosphorus removal. Chemical treatment as a rule means addition of chemicals. Such chemicals are
Nazih K. Shammas +3 more
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Chemical equilibrium: VIII. Precipitates
Journal of Chemical Education, 1991The 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 precipitation within pyritic waste rock
Hydrometallurgy, 2005Abstract Pyritic waste rock piles generate acid rock drainage (ARD). If the chemical precipitation of metals could be induced within waste rock piles by the weathering products of phosphate and carbonate minerals, seepage metal loads–and treatment costs–could be reduced.
Margarete Kalin, Bryn Harris
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Studies on chemically precipitated Mn(IV) oxides—I
Electrochimica Acta, 1983Abstract Divalent manganesse salts are oxidised by alkali metal chlorates under various reactions conditions. The oxides so obtained are characterised by chemical analysis, X-ray and infra-red studies. The structure of the dioxides thus precipitated is found to be greatly influenced by the quantities of the reactants used, mode of precipitation ...
Julio B. Fernandes +2 more
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Chemical modeling for precipitation from hypersaline hydrofracturing brines
Water Research, 2016Hypersaline hydrofracturing brines host very high salt concentrations, as high as 120,000-330,000 mg/L total dissolved solids (TDS), corresponding to ionic strengths of 2.1-5.7 mol/kg. This is 4-10 times higher than for ocean water. At such high ionic strengths, the conventional equations for computing activity coefficients no longer apply; and the ...
Maria I, Zermeno-Motante +4 more
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Chemical precipitation for controlling nitrogen loss during composting
Waste Management & Research: The Journal for a Sustainable Circular Economy, 2009Aimed at controlling the nitrogen loss during composting, the mixture of magnesium hydroxide (Mg(OH) 2) and phosphoric acid (H3PO4) (molar ratio 1:2) were utilized as additives to avoid increasing total salinity. In trial TA, the additives were put into absorption bottles connecting with a gas outlet of fermentor ( ex situ method); in trial TB, the ...
Li-Mei, Ren +4 more
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Chemical Composition of Precipitation at Long Island, NY
Water, Air, and Soil Pollution, 1986Chemical 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
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Chemical properties of insoluble precipitation residue particles
Journal of Aerosol Science, 2014Abstract Precipitation chemistry can provide unique insights into the composition of aerosol particles involved in precipitation processes. Until recently, precipitation chemistry studies focused predominantly on soluble components. Analyzing the single particle insoluble components in addition to soluble ions in precipitation can provide detailed ...
Jessie M. Creamean +7 more
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Interaction between Mixing, Chemical Reactions, and Precipitation
Industrial & Engineering Chemistry Research, 2005The way in which reagents are mixed can have a large influence on the product distribution of chemical reactions and the size distribution of particles of the solid product. To model effects of mixing on various scales on the course of chemical reactions and precipitation processes, a nonequilibrium multiple-time-scale mixing model and a beta ...
Jerzy Bałdyga +2 more
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Chemical Composition of the Precipitation Over the Netherlands
1981Abstract 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 +2 more
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