Abstract: An activating agent for the treatment of radioactive wastewater. The activating agent is prepared by dissolving a mixture of inorganic salts including Ca2+, Na+, Sr2+, Zn2+, Mg2+, Fe2+ and K+ in pure water having an electrical resistivity greater than 0.5 M?·cm to yield a solution. A method of radioactive wastewater treatment using the activating agent includes: 1) preparing the activating agent; 2) adding the activating agent to radioactive wastewater having an electrical resistivity greater than 0.5 M?·cm; uniformly mixing the activating agent and the radioactive wastewater; 3) further treating the radioactive wastewater including the activating agent using an electro-deionization device; and 4) collecting two liquid flows obtained in 3), one being purified water, the other being concentrated water returning to 2) for further purification.

Abstract: A method of treatment of radioactive wastewater. The method includes: allowing radioactive wastewater to undergo reverse osmosis treatment and continuous electrodeionization treatment in sequence. The continuous electrodeionization treatment is carried out in a continuous electrodeionization unit including a continuous electrodeionization membrane stack including a dilute chamber and a concentrate chamber. The dilute chamber is filled with between 30 and 60 vol. % of a first strong-acid cation exchange resin, between 40 and 60 vol. % of a first strong-base anion exchange resin, and between 0 and 30 vol. % of a weak-base anion exchange resin. The concentrate chamber is filled with between 20 and 50 vol. % of a second strong-acid cation exchange resin, and the rest is a second strong-base anion exchange resin.

Abstract: The invention discloses a micron-grade magnetic core coated ferrocyanide adsorbent for removing Cs ions in radioactive wastewater and a preparation method thereof. The adsorbent takes magnetic Fe3O4 as a core, the surface is coated with a dense SiO2 single layer serving as a protective layer, and an active component is metal ion stabilized potassium ferrocyanide coated on the outer layer, wherein stabilized metal ions comprise Ti, Zn, Cu, Ni, Co, and Zr. The particle size of the adsorbent is 0.2-5 ?m, the adsorbent in the outermost layer is conductive to improving the adsorption efficiency for Cs+ ions, and an external magnetic field is adopted for realizing solid-liquid phase separation.

Abstract: An activating agent for the treatment of radioactive wastewater. The activating agent is prepared by dissolving a mixture of inorganic salts including Ca2+, Na+, Sr2+, Zn2+, Mg2+, Fe2+ and K+ in pure water having an electrical resistivity greater than 0.5 M?·cm to yield a solution. A method of radioactive wastewater treatment using the activating agent includes: 1) preparing the activating agent; 2) adding the activating agent to radioactive wastewater having an electrical resistivity greater than 0.5 M?·cm; uniformly mixing the activating agent and the radioactive wastewater; 3) further treating the radioactive wastewater including the activating agent using an electro-deionization device; and 4) collecting two liquid flows obtained in 3), one being purified water, the other being concentrated water returning to 2) for further purification.

Abstract: A method of treatment of radioactive wastewater. The method includes: allowing radioactive wastewater to undergo reverse osmosis treatment and continuous electrodeionization treatment in sequence. The continuous electrodeionization treatment is carried out in a continuous electrodeionization unit including a continuous electrodeionization membrane stack including a dilute chamber and a concentrate chamber. The dilute chamber is filled with between 30 and 60 vol. % of a first strong-acid cation exchange resin, between 40 and 60 vol. % of a first strong-base anion exchange resin, and between 0 and 30 vol. % of a weak-base anion exchange resin. The concentrate chamber is filled with between 20 and 50 vol. % of a second strong-acid cation exchange resin, and the rest is a second strong-base anion exchange resin.

Abstract: The invention discloses a micron-grade magnetic core coated ferrocyanide adsorbent for removing Cs ions in radioactive wastewater and a preparation method thereof. The adsorbent takes magnetic Fe3O4 as a core, the surface is coated with a dense SiO2 single layer serving as a protective layer, and an active component is metal ion stabilized potassium ferrocyanide coated on the outer layer, wherein stabilized metal ions comprise Ti, Zn, Cu, Ni, Co, and Zr. The particle size of the adsorbent is 0.2-5 ?m, the adsorbent in the outermost layer is conductive to improving the adsorption efficiency for Cs+ ions, and an external magnetic field is adopted for realizing solid-liquid phase separation.