Studies on Aging and Coprecipitation. XXVIII. Adsorption of Divalent Ions on and Coprecipitation with Ortho Ferric Hydroxide in Ammoniacal Medium.

Abstract

In a previous paper (4) the adsorption of the ammonio copper ion on and coprecipitation with ortho ferric hydroxide has been studied, and a condensed review of the literature on the adsorption and coprecipitation of divalent ions from ammoniacal medium has been given. In the present work the studies have been extended to the adsorption and coprecipitation of zinc, nickel, cobalt, manganese, magnesium, and calcium. materials Most of the reagents and salts used were of c.p. quality. For the purity of ferric chloride and ammonia the reader is referred to a previous study (4). ANALYTICAL PROCEDURESZinc was determined by the ferrocyanide method, using the directions of Kolthoff and Pearson (5). In a few experiments zinc was determined

Heavy metal adsorption by hydrous iron and manganese oxides

“…Analytical chemists have studied adsorption of foreign ions on hydrous oxides from the viewpoint of contamination of precipitates as well as the removal of radioactive el-1 Present address, Department of Chemistry, University of Florida, Gainesville, Fla. 32611. ements from solution (1)(2)(3)(4). In general, a dramatic increase in adsorption is observed with increasing pH and hydrogen ions are released into the solution.…”

Determination of magnesium oxide in finely divided magnesium metal

“…More recently it has become desirable to know the oxide content, primarily superficial, of magnesium powders used in the preparation of flares. Military specifications (1,2) call for the determination of active magnesium in such powders, wherein a sample is dissolved with dilute sulfuric acid and the evolved hydrogen is measured in a eudiometer. In the absence of other metals, this procedure can be used to furnish a measure of the oxide content by difference, but the precision is not great and a direct oxide determination would be preferred.…”

Some Properties of the Radiation from Radiomanganese 54 and the Adsorption of Manganous Manganese on Hydrous Ferric Oxide.

“…Portions of this paper were presented at the Regional Meeting of the American Chemical Society which was held at Seattle, Washington, on October 20, 1945 2. Present address: Eastman Kodak Company, Color Control Division, Kodak Park Works, Rochester 4, New York 3.…”