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Home Georgian Technologies Technology for Production of Composite Materials for Wastewater Purification

Technology for Production of Composite Materials for Wastewater Purification

Description

During the last 150 years, the global industrial revolution leads to continuous pollution of hazardous wastes and results in deterioration of the sources of drinkable water. Nowadays, the problem of water quality and safety becomes even more urgent due to wide spreading of nuclear power plants (NPP) and inevitable uncontrolled pollution of minor amounts of radiotracers (235U, 137Cs and 90Sr on the first place), to say nothing about numerous NPP accidents, from insignificant ones to Three Mile Island and Chernobyl. High-level radioactive wastes accumulated in nuclear technologies have to be disposed in an economical and safe manner, and aftereffects of their possible leakages have to be effectively removed.

Water purification can be performed by means of processes employing numerous physical and chemical methods like precipitation and co-precipitation, distillation, filtering, osmosis and electroosmosis, dialysis and electrodialysis, sorption and electrosorption, etc. One of the most powerful, and therefore the most promising technologies of water management during the 21st century is the technology based on ionexchange resins and, especially, ion sieves or, in a broader sense, selective inorganic ionites. Ion-exchange sorption is equally (and successfully) applicable in small and large scales, to concentrated and infinitely diluted solutions.

Innovative Aspect and Main Advantages

Obtained results will promote synthesis of materials with improved adsorption properties with the aim of their application for purification of water from strontium, copper, cadmium, lead, etc. It is shown, that the most promising way for amendment of manganese oxide is modification of this material by acid-resistant oxides. It is anticipated that the target in work product can have competitive price, if compared with existing sorbents for strontium, copper, cadmium, lead, etc.

The joint work of the research teams has focused on both scientific and engineering benefits:

  • Electrochemical and corrosion studies of manganese oxides have shown that for power sources with aqueous electrolytes, the irradiated manganese oxide is an optimal cathode material.
  • Electrochemical investigations of amorphous manganese oxides in power sources with lithium anodes demonstrate a noticeable increase in specific discharge capacity (up to 30 %) prospective for technical applications.
  • Studies of electrochemical intercalation-deintercalation into amorphous titanium oxide in organic electrolytes reveal high rate and reversibility of the processes studied. This is prospective for creation of novel anode materials instead of carbonaceous materials
  • Catalyst containing equal amounts of manganese oxide and titanium oxide has unique properties in the oxidation of paraffin hydrocarbons, aromatic hydrocarbons, and carbon monoxide.

Areas of Application

Water management; energy production; catalysis.

Water management:

  • Sorption of 90Sr and 235U as major radiotracer pollutants from drinkable water and wastewater;
  • Possible use of sorbents for sorption of other harmful cations (Cu2+, Cd2+, etc.).

Effective mixed MnO2 - TiO2 sorbents for Sr2+ enabling one to operate in neutral solutions; Irradiated MnO2 based sorbents for Sr2+, Pb2+, and Cu2+ cations.


Stage of Development

The research is currently under way: Development phase Technology transfer and cooperation for further development are sought.

Contact Details

R.Agladze Institute of Inorganic Chemistry and Electrochemistry
11 Mindeli str. 0186 Tbilisi, Georgia
Contact person: T.A.Marsagishvili
Tel./Fax: (+995 32) 30 1830
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Institute for Sorption and Problems of Endoecology National Academy of Sciences of Ukraine
13, General Naumov St. 03680 Kyiv, Ukraine,
Contact person: S.A. Kirillov
Tel./Fax: (+380 44) 25 35736
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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