scholarly journals Preparation and Evaluation of Adsorbents from Coal and Irvingia gabonensis Seed Shell for the Removal of Cd(II) and Pb(II) Ions from Aqueous Solutions

2018 ◽  
Vol 5 ◽  
Author(s):  
Mercy A. Ezeokonkwo ◽  
Okechukwu F. Ofor ◽  
Julius U. Ani
Keyword(s):  
Aqueous Solutions ◽  
Irvingia Gabonensis ◽  
Preparation And Evaluation

Preparation and Evaluation of Skeletal Cobalt-Molybdenum Hydrodesulfurization Catalysts

1995 ◽  
Vol 60 (4) ◽  
pp. 568-575
Author(s):  
Karel Sporka ◽  
Jiří Hanika ◽  
Vladimír Jůn
Keyword(s):  
Aqueous Solutions ◽  
Active Component ◽  
Catalyst Activity ◽  
Gas Oil ◽  
Gamma Alumina ◽  
Molybdenum Sulfides ◽  
Hydrodesulfurization Catalysts ◽  
Hds Catalysts ◽  
Kinetics Of ◽  
Preparation And Evaluation

Preparation of skeletal Co-Mo catalysts by controlled impregnation of aluminosilicate skeletons containing deposited gamma-alumina with aqueous solutions of active component precursors has been investigated. The activity of the laboratory catalysts in gas oil hydrodesulfurization has been determined. Kinetics of impregnation of skeletal supports, the effect of their type, and the dependence of catalyst activity on the content of cobalt and molybdenum sulfides are reported. HDS skeletal catalysts prepared were compared with the extruded types. It was found that skeletal HDS catalysts show the higher activity (related to the content of alumina and Co-Mo sulfides) than the extruded ones due to the less significant effect of internal diffusion. However, if the activity is related to the same volume of catalyst bed, the activity of skeletal catalysts is only one fourth of that of the extruded types.

Preparation and Evaluation of a Water-Soluble Cholesterol Standard

1974 ◽  
Vol 20 (4) ◽  
pp. 482-485 ◽  
Author(s):  
Bernard Klein ◽  
Norman B Kleinman ◽  
James A Foreman
Keyword(s):  
Aqueous Solutions ◽  
Water Soluble ◽  
Organic Salts ◽  
Cholesteryl Hemisuccinate ◽  
Preparation And Evaluation ◽  
Analytical Reference ◽  
Inorganic And Organic

Abstract We synthesized some inorganic and organic salts of cholesteryl hemisuccinate. Aqueous solutions of the morpholine salt, at concentrations equivalent to 400 mg of cholesterol per deciliter, have been evaluated as aqueous cholesterol standards and compared to alcoholic cholesterol solutions in analyses for cholesterol in serum, as performed by two analytical reference procedures. No significant differences were found. The usefulness of solutions of this salt as additives for serum controls or recovery studies has been also demonstrated.

scholarly journals PREPARATION AND EVALUATION OF MAGNETIC CHITOSAN PARTICLES MODIFIED WITH ETHYLENEDIAMINE AND Fe(III) FOR THE REMOVAL OF Cr(VI) FROM AQUEOUS SOLUTIONS

Química Nova ◽  
2014 ◽  
Author(s):  
Thiago V. Toledo ◽  
Carlos R. Bellato ◽  
Carlos H. Ferreira de Souza ◽  
Junielly T. Domingues ◽  
Danilo de C. Silva ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Magnetic Chitosan ◽  
Preparation And Evaluation
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