Science Target Conference Systems, Ajman 4th International Environment Conference 2016

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Efficient Extraction of Radioactive Isotopes of Cobalt, Europium, Cerium, Strontium and Copper from Aqueous Solutions
Sergiy N. Lavrynenko, Valentin A. Chebanov, Dmitriy S. Sofronov

Last modified: 2016-01-04

Abstract


One of the most effective and simple methods of natural and waste waters from heavy metals and radionuclides is a sorption extraction. As sorbents proposed the use of polymers, natural materials, and other oxides. The particles of iron oxide Fe2O3 and Fe3O4 are among the most promising materials for inorganic heavy metal ions and radionuclides from water bodies. Their advantage over other compounds is the lack of toxic effects on the human body, low cost and ease of obtaining precursors.

Synthesis of Fe2O3 particles: 100 ml of a 0.2M precursor salts of iron (III) an aqueous solution of ammonia or ammonium bicarbonate to a predetermined pH ranging from 7 to 12 and stirred on a magnetic stirrer for 30 min, etc.

Synthesis of Fe3O4 particles was performed by precipitation from aqueous solution: 5.99 g FeSO4•7H2O and 10.79 g of FeCl3•6H2O was dissolved in 40 ml of distilled water, etc.

The results of calculation by Langmuir's method shown, that size of the sorption capacity Fe2O3 particles with 150 m2/g specific surface for all investigated metals are higher than the sorbents based on Fe3O4 with 130 m2/g specific surface. The highest sorption capacity is observed for the europium – 21.3 mg/g and 19.7 mg/g on the particles of Fe2O3 and Fe3O4, respectively, and the lowest - cerium on the particles of Fe2O3 (9,2 mg/g) and Fe3O4 particles (7.5 mg/g).

 

Key words: heavy metals, radioactive isotopes, radionuclides, sorption extraction, particles synthesis