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Home Environmental Amorphous Nano-Materials As 90sr Scavengers, Environmental Catalysts And Anodes In Lithium Batteries

Amorphous Nano-Materials As 90SR Scavengers, Environmental Catalysts And Anodes In Lithium Batteries

Description

Over the past 50 years, huge amounts of radioactive wastes and wastewater are accumulated in nuclear plants, reactor disassembly basins and accident sites, and much the radioactivity of these wastes arises from 90Sr that tends to be concentrated in the liquid phase. A few ion exchangers for removing 90Sr from wastes and groundwater having extremely high distribution coefficients (Kd) became available on the market, though disadvantages of these materials are obvious: their effectiveness is maximal in strongly alkaline solutions, and the lower the pH value of wastewater, the lower the Kd value and the decontamination factor are.

Amorphous manganese oxide – titanium oxide composites (AMTO) are materials having high affinity to strontium combined with high working ability in neutral media.

Innovative Aspect and Main Advantages

Distribution coefficients for sorption of 90Sr from simulants of Savannah River high-level waste demonstrate advantages of AMTO over the best known commercial sorbents.

Sorbent Kd (mL/g)
AMTO 58000-102000
SrTreat® 6970-222000
CST IONSIV® IE-910 4340-8820

The dependence of Kd of 90Sr on pH for AMTO (Fig. 1) reveals its good working ability in neutral media.


Fig. 1

Estimated price for AMTO is at least five times less than for products available from competitors.

Areas of Application

  • Water management (decontamination of from 90Sr)
  • Ecological catalysis (AMTO samples are prospective ecological catalysts, being able to effectively oxidise carbon monoxide, paraffin and aromatic hydrocarbons at low temperatures, Fig. 2).
  • Lithium batteries (anodes from amorphous titanium oxide obtained using the same technology demonstrate better performance (curve 4, Fig. 3) than the best known TiO2 based anode materials (curves 1, 2, 3). Depending on discharge conditions, the discharge current can reach the value of 3.5 A/g at specific capacities up to 80 A·h/kg).


Fig. 2


Fig. 3

Stage of Development

Several laboratory batches of the materials in question were produced, and adsorption, catalytic and electrochemical (sample batteries) tests were performed.

Contact Details

Contact person: Sviatoslav A. Kirillov
Institute for Sorption and Problems of Endoecology
Address: 13, Gen. Naumov St., 03164 Kyiv, Ukraine
(+380 44) 424-3572, Mobile: (+380 66) 303-6181
/ Fax : (+380 44) 452- 9846
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