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Showing 1 to 20 of 56 for “"ferric chloride"”.
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Ferric chloride from crude copperas
… Crude copperas can be used to make a solution of ferric chloride by reacting it with calcium chloride, filtering off the precipitate of calcium sulfate, and oxidizing the ferrous iron to ferric iron with chlorine gas. The calcium content of the ferric chloride solution is low enough so that the …
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The rates of oxidation of galena and sphalerite in acidic ferric chloride solutions
… cubic, monosulfides their reaction rate with ferric iron differs by about 2.5 orders of magnitude for m<sub>Fe³⁺</sub> = 10⁻³.
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The oxidation rates of arsenopyrite and chalcopyrite in acidic ferric chloride solutions at 0 to 60°C
The rates of oxidation of arsenopyrite and chalcopyrite by Fe³⁺ at concentrations of 10⁻² to 10⁻⁵ molal with a pH near 2 and temperatures of 0 to 60°C, conditions similar to those found in weathering sulfide ore deposits, have been determined. The rate equations for 25°C are: dn<sub>Fe</sub>3+/dt = …
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Physical properties of chemically conditioned sludges
… the best conditioner for activated sludge is ferric chloride. Addition of ten percent ferric chloride (on dry solids basis) enhanced the dewatering process and slightly increased the shear strength. Polymer was also an excellent conditioner for activated sludge. A polymer dose of 0.6 percent …
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Color removal from pulp and paper wastes by coagulation
… collected during this research, either alum or ferric chloride may be used to remove color from pulp and paper wastes. An effluent with final residual color less than 5 color units can be generated using PAC treatment after flocculating certain waste streams with alum or ferric chloride. Higher …
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Conditioning for shear in sludge dewatering
… using anaerobically digested sludge. Lime, ferric chloride, and polymer were used to condition anaerobically digested sludge to evaluate the influence of these conditioning agents, separately and in combination, on shear resistance. Dewatering studies were performed using a plate and frame …
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The removal of organic waste matter from secondary sewage effluents by chemical coagulation
… plant. The inorganic coagulants alum, ferric chloride and lime as well as organic polyelectrolytes were tested for their ability to remove the organic waste matter from the above effluents under various conditions of pH and coagulant concentration. The tests were on laboratory scale and …
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Treatability of Dissolved Organic Nitrogen in Truckee Meadows Water Reclamation Facility Using Coagulation or Ozone Treatment
… doses and combinations of aluminum sulfate, ferric chloride, and the proprietary polymer Clarifloc®. The maximum observed DON removal when using aluminum sulfate was 59% at a combined dose of 24 mg Al2(SO4)3.14H2O/L and 2 mg/L polymer. When ferric chloride was used, the maximum observed DON …
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Effect of iron and sodium chloride on biofilm development of stenotrophomonas maltophilia
… resistance to antimicrobials. Factors such as ferric chloride (FeCl3), and sodium chloride (NaCl) have been shown to inhibit the biofilm development of another respiratory pathogen, Pseudomonas aeruginosa, without affecting culture growth. The effect of FeCl3 and NaCl on P. aeruginosa biofilm …
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Chemical treatment of anaerobic digester supernatant
… on achieving maximum phosphorus removal. Lime, ferric chloride, and alum were the precipitants used in this study. All precipitants effectively reduced the total phosphate concentration by 98.5% or better. For lime an end point pH of 12.3 or greater corresponded to the maximum phosphorus …
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Coagulation study of a bound water bulked sludge
… to determine the coagulation effects of alum, ferric chloride, and cationic polymer when the coagulants are added to a sludge which has bulked due to a high bound water content. The effect of coagulant addition upon microbial metabolism was studied using dissolved oxygen uptake. Coagulant …
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Silicon-Directed Nazarov Cyclization
… beta-silyl divinyl ketones are reported. Ferric chloride induces cyclization under mild conditions in good yields with predictable and complete control over the position of the double bond. An extensive study of the scope, mechanism, and stereochemical outcome of the reaction is also …
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Cyclic nitrones: oxidation studies and the synthesis of a heterocyclic nitrone
… rapidly oxidised to 4-hydroxy-3-morpholone by ferric chloride. This cyclic hydroxamic acid underwent further oxidation at a slower rate, ultimately yielding diglycollic acid and nitrous oxide. 1,3-Cycloaddition products were formed when the heterocyclic nitrone was heated together with …
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Characteristics and conditioning of anaerobically digested sludge from a biological phosphorus removal plant
… of either one or both of the inorganic chemicals ferric chloride and calcium hydroxide was required to remove soluble phosphorus. Conditioning with either ferric chloride or calcium hydroxide alone was not effective in achieving acceptable dewatering rates; however, when used together the …
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Aromatic acetals : their synthesis and alkylation
… Some of the catalysts used were hydrogen chloride, calcium chloride, ferric chloride, aromatic sulfonic acids, and other. There was no data available comparing the sulfonic acids with the inorganic salts and mineral acids. For that reason one of the subsidiary problems of this …
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The solvent extraction of CU (II) from chloride solutions with certain non-chelating nitrogen donor ligands
The extraction of copper from chloride solutions with some aliphatic oximes as well as some pyridine carboxylates was studied and the complexes formed in the organic phase identified. The association of octanal oxime in toluene was taken into account in the extraction studies and formation …
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Optical absorption and electrical conductivity of electron acceptor doped poly-3-octylthiophene films
… and with the inorganic electron acceptor, ferric chloride (FeCl{dollar}\sb3{dollar}). Charge transfer was observed in P3OT solutions doped with FeCl{dollar}\sb3{dollar} and DDQ. TCNQ-doped solutions showed no optical evidence of charge transfer. Thin films of the doped P3OT were examined at …
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Phytate Extraction and Stimulation of Phytase by Zn & Mg in Seeds
… After phytic acid was extracted by hot HCl, ferric phytate was precipitated by adding an excess amount of ferric chloride. The iron of ferric phytate was converted to ferric hydroxide with NaOH and the amount of iron in each sample was spectrophotometrically determined.</p> <p>The results in …
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The Effect of Seed Sprouting Time and Light on Phytic Acid Concentration
… 1) phytic acid was extracted by hot HC1, 2) ferric phytate was precipitated by adding an excess of ferric chloride to the extraction, 3) ferric phytate was converted to ferric hydroxide with NaOH, and 4) the amount of iron in the samples was determined colorimetrically using o-phenanthroline …
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Evaluation of Nitrification Inhibition Using Bench-Scale Rate Measurements, Profile Sampling, and Process Simulation Modeling
… (PAOs). • Evaluate the impact of sporadic ferric chloride addition to the biological process as a means of preventing effluent TP exceedances. • Evaluate the design μmax to the actual observed μmax for AOB through simulation modeling. • Compare modeling and observed profile data for signs …
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