The present disclosure relates to analysis of Hg(II) isotopes in the aqueous phase, and provides an in-situ enrichment method and an analytical method for Hg(II) isotopes in the aqueous phase. The in-situ enrichment method includes the following steps: conducting adsorption in the water sample by a diffusive gradient in thin-films (DGT) device to obtain an Hg(II)-adsorbed DGT device; where a binding gel of the DGT device is an NSBA gel; conducting elution on the NSBA gel in the Hg(II)-adsorbed DGT device to acquire an Hg(II)-containing eluate with a mercury concentration higher than or equal to 0.5 ng/mL; where the elution is carried out with an eluent of reverse aqua regia. In the in-situ enrichment method, the NSBA-DGT device only needs to be placed in the water sample to be investigated to perform in-situ Hg(II) adsorption without direct grab sampling.

The present disclosure relates to analysis of Hg(II) isotopes in the aqueous phase, and provides an in-situ enrichment method and an analytical method for Hg(II) isotopes in the aqueous phase. The in-situ enrichment method includes the following steps: conducting adsorption in the water sample by a diffusive gradient in thin-films (DGT) device to obtain an Hg(II)-adsorbed DGT device; where a binding gel of the DGT device is an NSBA gel; conducting elution on the NSBA gel in the Hg(II)-adsorbed DGT device to acquire an Hg(II)-containing eluate with a mercury concentration higher than or equal to 0.5 ng/mL; where the elution is carried out with an eluent of reverse aqua regia. In the in-situ enrichment method, the NSBA-DGT device only needs to be placed in the water sample to be investigated to perform in-situ Hg(II) adsorption without direct grab sampling.

Tritium is isolated and recovered from tritium-containing water by a membrane electrode including a manganese oxide having a spinel crystal structure and containing hydrogen ions or lithium ions and having one surface coated with a membrane of an ion conductive material.

Tritium is isolated and recovered from tritium-containing water by a membrane electrode including a manganese oxide having a spinel crystal structure and containing hydrogen ions or lithium ions and having one surface coated with a membrane of an ion conductive material.

Utilizing the fact that a predetermined adsorbent adsorbs light water at an initial desorption rate higher than heavy water and semi-heavy water, deuterium depleted water having a reduced concentration of heavy water and semi-heavy water is produced easily and in a short time. A method for producing deuterium depleted water by removing heavy water and semi-heavy water from water, the method including: a desorption process in which a relative pressure around a predetermined adsorbent with adsorbed water vapor is reduced, and in which water vapor desorbed from the adsorbent is recovered during a period of time when a desorption rate of light water>a desorption rate of the heavy water and semi-heavy water.

Utilizing the fact that a predetermined adsorbent adsorbs light water at an initial desorption rate higher than heavy water and semi-heavy water, deuterium depleted water having a reduced concentration of heavy water and semi-heavy water is produced easily and in a short time. A method for producing deuterium depleted water by removing heavy water and semi-heavy water from water, the method including: a desorption process in which a relative pressure around a predetermined adsorbent with adsorbed water vapor is reduced, and in which water vapor desorbed from the adsorbent is recovered during a period of time when a desorption rate of light water>a desorption rate of the heavy water and semi-heavy water.

The invention provides a method for isolating medical isotopes, the method having the steps of dissolving titanium nuclear targets to create a solution; contacting the solution with a resin so as to retain the isotopes on the resin and generate an eluent containing titanium; contacting the isotope-containing resin with acid of a first concentration to remove impurities from the resin; and contacting the isotope-containing resin with an acid of a second concentration to remove isotope from the resin.

Methods and systems directed to the separation of tritium from an aqueous stream are described. The separation method is a multi-stage method that includes a first stage during which tritium of a tritium-contaminated aqueous stream is adsorbed onto a separation phase, a second stage during which the adsorbed tritium is exchanged with hydrogen in a gaseous stream to provide a gaseous stream with a high tritium concentration, and a third stage during which the tritium of the gaseous stream is separated from the gaseous stream as a gaseous tritium product.

Methods and systems directed to the separation of tritium from an aqueous stream are described. The separation method is a multi-stage method that includes a first stage during which tritium of a tritium-contaminated aqueous stream is adsorbed onto a separation phase, a second stage during which the adsorbed tritium is exchanged with hydrogen in a gaseous stream to provide a gaseous stream with a high tritium concentration, and a third stage during which the tritium of the gaseous stream is separated from the gaseous stream as a gaseous tritium product.

Deuterium-depleted water is produced easily and inexpensively. A method for producing deuterium-depleted water by removing heavy water and semi-heavy water from water includes an adsorption step of supplying water vapor to a predetermined adsorbent at pressure at which heavy water and semi-heavy water are adsorbed by the adsorbent and light water is not easily adsorbed, causing the heavy water and semi-heavy water to be adsorbed, and recovering the water vapor not adsorbed by the adsorbent. The method also includes a desorption step of maintaining vapor pressure around the predetermined adsorbent which has adsorbed the water vapor in a range in which light water is desorbed and heavy water or semi-heavy water is not easily desorbed, and recovering the water vapor desorbed from the adsorbent.