Method for treating liquid radioactive waste
Author: R.A. Penzin, V.C. Sheptunov, B.M. Lesokhin, V.K. Bulygin, S.V. Petrov
Reference: Patent, 27.05.1998, Moscow patent holder: R.A. Penzin
Keywords: liquid waste, treatment, filtration, cesium, strontium
Abstract: Usage: chemical technology, specifically in the nuclear environment, the processing of liquid radioactive waste (LRW) resulting from the operation of various atomic power plants. Stepwise processing of liquid waste, containing cesium and strontium, is conducted in the following sequence:
>Pre-treatment stage: mechanical cleaning, ultrafiltration, microfiltration
>Passing through selective inorganic sorbent, based on ferrocyanide of transitional metal of copper, nickel, cobalt and porous inorganic carrier
> Passing through reverse osmosis module, at salt concentrations of 1 g / l, in one step. The second step of the same, with flows divided into concentrate and permeate, is then subjected to post-treatment by passing through a sorbent selected from the group of:
synthetic zeolite of type “A”, chabazite of hexagonal structure or natural zeolite of monoclinic structure, which are used as a modified zeolite “CM-SELEX.”
URL:http://www.findpatent.ru/patent/211/2112289.html
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