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2010•World Nuclear GeoscienceRequires access

Determination of uranium in the molybdenum concentration

Feng Zhang-sheng

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Abstract

Minerals are dissolved by acid solution and ammonia is added to the solution,then molybdenum will form(NH4)2MoO4,copper will form complex ion:[Cu(NH4)4]2+ remains in solution. Molybdenum and copper are removed by filtering. The residue is dissolved by 2% hydrochloric acid,lead and residues will leave in the filter paper,iron and other metals and uranium exist in the filtrate in the form of ion. Adding EDTA to the filtrate and adjust the acidity with ammonia to pH=7±0.5,the uranium will precipitate in the form of (NH4)2U2O7,iron will form Fe(OH)Y complex ion. By filtering and separating,uranium will be obtained. Recovery of the method is 98.8%-101.4%.

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What this paper is about

Minerals are dissolved by acid solution and ammonia is added to the solution,then molybdenum will form(NH4)2MoO4,copper will form complex ion:[Cu(NH4)4]2+ remains in solution. Molybdenum and copper are removed by filtering. The residue is dissolved by 2% hydrochloric acid,lead and residues will leave in the filter paper,iron and other metals and uranium exist in the filtrate in the form of ion. Adding EDTA to the filtrate and adjust the acidity with ammonia to pH=7±0.5,the uranium will precipitate in the form of (NH4)2U2O7,iron will form Fe(OH)Y complex ion. By filtering and separating,uranium will be obtained. Recovery of the method is 98.8%-101.4%.

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Available abstract

Minerals are dissolved by acid solution and ammonia is added to the solution,then molybdenum will form(NH4)2MoO4,copper will form complex ion:[Cu(NH4)4]2+ remains in solution. Molybdenum and copper are removed by filtering. The residue is dissolved by 2% hydrochloric acid,lead and residues will leave in the filter paper,iron and other metals and uranium exist in the filtrate in the form of ion. Adding EDTA to the filtrate and adjust the acidity with ammonia to pH=7±0.5,the uranium will precipitate in the form of (NH4)2U2O7,iron will form Fe(OH)Y complex ion. By filtering and separating,uranium will be obtained. Recovery of the method is 98.8%-101.4%.

Key concepts: Uranium, Molybdenum, Chemistry, Hydrochloric acid, Copper, Ammonia, Inorganic chemistry, Ion

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