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.

According to the present invention, water is separated into deuterium-depleted water and deuterium-concentrated water easily at low cost. Provided is a method for producing deuterium-depleted water by removing heavy water and semi-heavy water from water, the method including: supplying water vapor for a predetermined time period to an adsorbent material 11 obtained by adding to a carbon material one or more of metals belonging to Group 8 to Group 13 of the Periodic Table of Elements as additive metals and causing the water vapor to adsorb while passing through the adsorbent material 11; subsequently bringing protium gas into contact with the adsorbent material 11; and then desorbing and collecting the water vapor that has adsorbed to the adsorbent material 11.

According to the present invention, water is separated into deuterium-depleted water and deuterium-concentrated water easily at low cost. Provided is a method for producing deuterium-depleted water by removing heavy water and semi-heavy water from water, the method including: supplying water vapor for a predetermined time period to an adsorbent material 11 obtained by adding to a carbon material one or more of metals belonging to Group 8 to Group 13 of the Periodic Table of Elements as additive metals and causing the water vapor to adsorb while passing through the adsorbent material 11; subsequently bringing protium gas into contact with the adsorbent material 11; and then desorbing and collecting the water vapor that has adsorbed to the adsorbent material 11.

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.

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.

An object of the present invention is to provide a deuterium recovery method and deuterium recovery equipment that can recover and reuse deuterium or deuterium compounds used in semiconductor manufacturing processes. The present invention provides a deuterium recovery method including: generating heavy water in an exhaust gas containing deuterium gas in a semiconductor manufacturing process.

An object of the present invention is to provide a deuterium recovery method and deuterium recovery equipment that can recover and reuse deuterium or deuterium compounds used in semiconductor manufacturing processes. The present invention provides a deuterium recovery method including: generating heavy water in an exhaust gas containing deuterium gas in a semiconductor manufacturing process.