RADIOACTIVE WASTES
TREATMENT
Cleaning of radioactive liquids

ANFEZH

Sorbent ANFEZH® for rapid concentration of cesium radionuclides

Description
The Sorbent ANFEZH® is designed for the rapid concentration of cesium radionuclides in the radiochemical analysis of weak acid and neutral aqueous solutions (marine and fresh water, technological solutions) with a total salt content of up to 500 g/dm3. Concentration is not hindered by high concentrations of sodium and potassium ions.
Sorbent ANFEZH® is widely used for the control of radioactive contamination of sea water. It was used by IAEA expedition RADEUX-98 and expeditions to survey the sink area of the Kursk submarine in the Barents Sea in 2000, Lawrence Livermore National Laboratory (USA) for the control of pollution of San Francisco Bay in 2001-2002, the National Institute of Radioecology Research of Japan for the control of coastal waters in the 2004-2007 and the Far Eastern Branch of the Russian Academy of Sciences for the control of pollution of the Pacific Ocean after the accident at the Fukushima NPP in 2011-2012.

Standard characteristics

Modification of sorbent

ANFEZH

ANFEZH-K

Extracts

Cs

Cs

Salt concentrations

Up to 500 g/dm3

Up to 500 g/dm3

​Based on

​Iron Ferrocyanide

​Iron Ferrocyanide

​Inorganic

​Yes

​Yes

​Stable

​Yes

​Yes

Carrier

Cellulose

Aluminosilicate

Form

​Solide granules

​Solide granules

​Bulk density, kg/l

0.25-0.4

0.6

​Grain size, mm

0.1-1.0

0.1-1.0

Decontamination factor

1500-5000, up to millions

1500-5000, up to millions

​Capacity typically (BV)

​50 000 - 250 000

​50 000 - 250 000

​Capacity typically (l/kg)

100 000 - 400 000

100 000 - 400 000

​Operating pH area

2-8,5

2-8,5

​Max. operating temperature (°C)

80

80

Service flow rate typically (BV/h)​

​10-20

​10-20



Supply of sorbents ANFEZH® and ANFEZH-K various size of particles on demand are available.

Technical features

ANFEZH® (on cellulose media) before use should be soaked in 2-3 volumes of hot (70-80 °C) water for 1-2 hours. For ANFEZH-K soaking is not required. The recommended rate of filtration of the solution is 80-100 ml through one square cm per minute at the thickness of the sorbent layer 10 – 20 cm. The optimum ratio of height to diameter of the sorbent bed sorption column is 3 – 5.