Synthesis and Sorption Properties towards Sr-90 of Composite Sorbents Based on Magnetite and Hematite

Materials
Andrei EgorinLarisa Zemskova

Abstract

The article describes the synthesis of composite sorbents by immobilizing iron oxide in a polymer matrix with subsequent hydrothermal treatment at a temperature of 175 °C. The sorbents based on magnetite and hematite were synthesized, their magnetic properties and phase composition were evaluated, and the iron content was determined. Sorption characteristics of the composites towards microconcentrations of Sr-90 radionuclide in solutions with different mineralization and pH were investigated. It was shown that the sorbent based on magnetite was the most efficient. In alkaline media with pH above 11, the composite sorbent based on magnetite exhibited increased selectivity towards Sr-90 and proved to be suitable for application under dynamic sorption conditions with subsequent desorption of the radionuclide with a solution of HNO3.

References

Dec 23, 1999·Journal of Colloid and Interface Science·O N KarasyovaL Lövgren
Jan 5, 2002·Environmental Science & Technology·B O HansenG V Korshin
Dec 7, 2007·Water Research·Teresia Möller, Paul Sylvester
May 1, 2009·Journal of Hazardous Materials·S A Abo-FarhaS E Garamon
Apr 22, 2015·Journal of Hazardous Materials·Congcong DingXiangke Wang
Dec 8, 2017·Environmental Science & Technology·Reid A PetersonSue B Clark
Aug 25, 2019·Journal of Hazardous Materials·Lila Otero-GonzálezIrina N Savina

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BETA
atomic absorption spectroscopy
X-ray

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SciDavis
QualX

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