3 results about "IODATE ION" patented technology

The invention belongs to the technical field of iodine removal of light salt brine, and particularly relates to a method for removing high-valence iodine in ionic membrane caustic soda light salt brine. Comprising the following steps: (1) adding a pH regulator and sodium sulfite into light salt brine, regulating the pH to 1-3, stirring until the reaction is completed, and carrying out primary adsorption deiodination by adopting a composite adsorbent to obtain light salt brine 1; and (2) adding a pH regulator and hydrogen peroxide into the light salt brine 1, regulating the pH value to 1-2, stirring until the reaction is completed, and carrying out secondary adsorption by adopting a composite adsorbent to remove iodine, thereby obtaining the deiodinated light salt brine. According to the removal method disclosed by the invention, high-valence iodine such as periodate and iodate in the light salt brine is converted into low-valence iodine such as iodate and iodide ions by utilizing the reducibility of sodium sulfite and the oxidation-reduction property of hydrogen peroxide in the coexistence of iodide ions and iodate, and then is further converted into simple substance iodine, and the simple substance iodine is efficiently removed by utilizing a composite adsorbent; the process is simple, the cost is low, the removal rate is high, and the removal effect is good.

This invention discloses a method for preparing a bismuth-based material and its application in the treatment of iodine-containing wastewater. The bismuth-based material is a bismuth-based oxoacid salt material and / or a bismuth-based oxoacid salt composite material; the bismuth-based material is used to remove iodide ions and iodate ions from iodine-containing wastewater. This invention provides a method for the simultaneous and efficient removal of iodide ions based on bismuth-based oxoacid salt materials and / or bismuth-based oxoacid salt composite materials. ‑ and IO3 ‑ The proposed method for treating iodine-containing wastewater has advantages such as high treatment efficiency, large adsorption capacity, high efficiency in removing iodine-containing wastewater of different concentrations, strong resistance to interference from coexisting anions, and a wide applicable pH range. The bismuth-based material of this invention exhibits good stability, is safe to use, and poses no risk of secondary pollution.

The present application relates to a kind of nuclear power plant overhaul when the purification method of iodine in primary loop, the purification method includes: using purification device to the iodine in primary loop unit of nuclear power plant overhaul is handled using hydrogen peroxide purification;The purification device includes primary loop unit and chemical volume control unit, hydrogen peroxide feeding equipment is arranged in the chemical volume control unit;Hydrogen peroxide feeding equipment is connected with the primary loop unit cooling liquid pipeline and communicates;The cooling liquid pipeline outlet of the primary loop unit and the chemical volume control unit are communicated.The specific hydrogen peroxide feeding system is configured to the primary loop cooling system of nuclear reactor, the treatment of iodine in primary loop cooling system is realized, and iodine-131 in elemental form can be oxidized to iodate ion (IO 3‑ ) after being removed by chemical volume control system desalination bed purification, while avoiding the need for lithium removal process when using lithium hydroxide to remove iodine.