Pitzer model parameters for sparingly soluble salts from solubility measurements: thallium(I) chloride in aqueous solutions of ammonium chloride, rubidium chloride and caesium chloride at 298.15 K

1994 ◽  
Vol 90 (13) ◽  
pp. 1895 ◽  
Author(s):  
Kean H. Khoo ◽  
K. Rodney Fernando ◽  
Lee-Hoon Lim
Keyword(s):  
Aqueous Solutions ◽  
Ammonium Chloride ◽  
Pitzer Model ◽  
Model Parameters ◽  
Soluble Salts ◽  
Rubidium Chloride ◽  
Caesium Chloride

Pitzer model parameters for sparingly soluble salts from solubility measurements. The systems TlCl+SrCl2+H2O and TlCl+BaCl2+H2O at 25�C

1995 ◽  
Vol 24 (10) ◽  
pp. 1039-1048 ◽  
Author(s):  
Kean H. Khoo ◽  
K. Rodney Fernando ◽  
Richard J. Fereday ◽  
Chee-Yan Chan
Keyword(s):  
Pitzer Model ◽  
Model Parameters ◽  
Soluble Salts

Research on Thermodynamic Properties of Bioleaching Solution in Lean Nickel-Cobalt Ore by Pitzer - Meissner Model

2015 ◽  
Vol 1092-1093 ◽  
pp. 1455-1459
Author(s):  
Chu Yue Hou ◽  
Gui Ying Zhou ◽  
Jian Kang Wen ◽  
Biao Wu
Keyword(s):  
Thermodynamic Properties ◽  
Activity Coefficient ◽  
Aqueous Solutions ◽  
Activity Coefficients ◽  
Pitzer Model ◽  
Foreign Ions ◽  
Nickel Cobalt

In this paper, we jointly use the Pitzer model and the Meissner model to study thermodynamic laws of bioleaching solution in a lean nickel-cobalt ore in the Jilin Baishan, by using the Pitzer model to calculate activity coefficients of single electrolyte aqueous solutions and the Meissner model to calculate activity coefficients of components in the bioleaching solution. Also we studied the rules of activity coefficient of NiSO4 and CoSO4 in the solution. Results show that when separating and purifying foreign ions from bioleaching solution of the lean nickel-cobalt ore, the descending sequence of their ion concentration’s effect over the solution is Mg2+, Fe3+, Fe2+, Ni2+, Co2+ and Ca2+.

The Further Chemistry of Ellagic Acid II. Ellagic Acid and Water-Soluble Ellagates as Metal Precipitants

Holzforschung ◽  
2002 ◽  
Vol 56 (1) ◽  
pp. 13-19 ◽  
Author(s):  
S.R. Przewloka ◽  
B.J. Shearer
Keyword(s):  
Aqueous Solutions ◽  
Metal Ions ◽  
Ellagic Acid ◽  
Water Soluble ◽  
Soluble Salts ◽  
Dilute Aqueous Solutions

Summary Preparations of the previously unreported, water-soluble, tetraguanidinium, tetracholine and tetrakisbenzyltrimethylammonium ellagates are outlined. Ellagic acid and these water-soluble salts remove Mg2+, Ca2+ and Mn2+ ions from dilute aqueous solutions at pH greater than 7. The salts also remove Fe2+, Fe3+, Co2+ and Cu2+ between pH 3 and pH 6. At pH 1 the water-soluble ellagates underwent hydrolysis, resulting in the precipitation of free ellagic acid in preference to the formation of metal-ellagate complexes. These trends were also observed when mixtures of metal ions were applied.

Comparison of Foliar and Soil-Drench Applications of Aqueous Rubidium Chloride Solutions to Plants for Marking Feeding Aphids (Homoptera: Aphidae)

1993 ◽  
Vol 28 (4) ◽  
pp. 370-375 ◽  
Author(s):  
L. P. Guillebeau ◽  
J. N. All ◽  
F. W. Nutter ◽  
C. Kuhn
Keyword(s):  
Aqueous Solutions ◽  
Myzus Persicae ◽  
Foliar Application ◽  
Green Peach Aphid ◽  
Physiological Effect ◽  
Macrosiphum Euphorbiae ◽  
Rubidium Chloride ◽  
Potato Aphid ◽  
Soil Drench ◽  
Foliar Treatment

Aqueous solutions of rubidium chloride, RbCl, (10 g/1, 10,000 ppm) were applied to foliage or soil of potted bell pepper and tomato. After 48 h, green peach aphid (Myzus persicae Sulzer) and potato aphid (Macrosiphum euphorbiae Thomas) were transferred to pepper and tomato, respectively. Leaf and aphid samples were collected after 6 d; remaining aphids were transferred to untreated plants. Aphid samples were collected periodically for 5 to 7 d. All samples were analyzed for Rb content. Results were similar for the pepper and tomato experiments. Soil-drench treatment produced significantly greater levels of Rb in leaf and initial aphid samples relative to foliar treatment. Levels of Rb in aphids from the two treatments were comparable after aphids fed on untreated plants for 24 h. Levels of Rb in aphids declined rapidly after removal from the source: undetectable by Day 6 in the potato experiment and reduced by nearly 90% by Day 5 in the tomato experiment. Foliar application of RbCl solution should be used in field situations. Application is more precise, and the length of detection is comparable with soil drench. Additionally, soil drenching with Rb produced an initially high peak of Rb in the aphids, which may have a physiological effect.

Preparation and Properties of Lanthanide Phosphates

2005 ◽  
Vol 284-286 ◽  
pp. 79-82 ◽  
Author(s):  
Regina Kijkowska ◽  
Racquel Z. LeGeros
Keyword(s):  
Phosphoric Acid ◽  
Acid Solution ◽  
Aqueous Solutions ◽  
Crystallization Process ◽  
Acidic Solution ◽  
Phosphoric Acid Solution ◽  
Precipitation Method ◽  
Crystalline Solids ◽  
Soluble Salts ◽  
Solubility Products

Lanthanide phosphates are known as slightly soluble salts with their solubility products ranging from 10-25 to 10-27. These phosphates can be obtained a) by precipitation from aqueous solutions of their salts using, for example, sodium or ammonium phosphates or b) by crystallization from boiling phosphoric acid solution. Application of crystallization in highly acidic solution instead of precipitation method yields highly crystalline solids of the composition of LnPO4.H2O (Ln: La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu and Y). This paper presents the effect of the acidity of the solution used for the crystallization process on crystallinity and morphology of EuPO4.H2O obtained: the higher the acidity of the solution the larger the crystals obtained. The morphology of the crystals changed from sphere-like particles crystallized in 2M H3PO4 to large hexagonal rods formed 2M H3PO4 with additional 0.4 M of HCl or HNO3.

Sign in / Sign up

Export Citation Format

Share Document