RADIOACTIVE WASTES
TREATMENT
Cleaning of radioactive liquids

SMET

Sorbent SMET for removal of antimony, mercury, cobalt, silver and toxic elements from liquids

Description
The sorbent SMET is an inorganic sorbent based on copper sulfides. It available in two versions: SMET and SMET-K (composite). SMET-K is a copper sulfide microparticles, chemically fixed on the granules of natural aluminosilicate (opal).

The porous support in the sorbent composition provides greater access to sorption sites that increases the capacitance per unit weight of the sorbing agent and improves the kinetics of sorption.

The copper sulphide is recovered of ions of antimony, mercury, arsenic, cadmium, cobalt and silver from the liquids solutions. It can operate in solutions with salts content up to 500 g/dm3.

Standard characteristics

Modification of sorbent

SMET

SMET-K

Extracts

Sb, Hg, As, Cd, Co, Ag

Sb, Hg, As, Cd, Co, Ag

​Based on

Copper Sulfide

Copper Sulfide

​Inorganic

​Yes

​Yes

​Stable

​Yes

​Yes

Carrier

None

Aluminosilicate

Form

Powder

​Solide granules

​Bulk density, kg/l

0,9

0,6

​Grain size, mm

less 0.3

0.3-1.7

Decontamination factor

200-2000

200-2000

​Operating pH area

5-13

6-13

​Max. operating temperature (°C)

80

80

Service flow rate typically (BV/h)​

​-

​10-20

Technical features

Most effective usage is in a static mode (addition of sorbent into the solution, followed by stirring and separation). The recommended ratio is 3-10 kg of the sorbent per 1000 liters (1m3) solution. The required contact time is 2 hours. Efficiency of recovery is 90 – 98% and higher.

In a dynamic mode, it is recommended to use SMET-K with a rate of filtering solution at 10 column volumes per hour, and the sorbent layer thickness of 20 cm. The optimum ratio of height to diameter of the sorbent layer columns is 2.5 - 3.5.