A device for preparing high-purity hydrogen and/or oxygen by electrolyzing water, including an electrolyzer and a degasser for degassing desalted water. The degasser is located at the upstream of the electrolyzer. After desalted water is heated and degassed in the degasser, the content of gaseous impurities, particularly argon, can be reduced to several ppb (weight ratio). The hydrogen and oxygen generated after the desalted and degassed water is electrolyzed in the electrolyzer also contain an extremely small amount of argon, so that the requirements in semiconductor industry are met. Also involved is a method of preparing high-purity hydrogen and/or oxygen by using the device.

System for removing sediments from a bed of a liquid environment such as a harbor or a pond, characterized in that it comprises a conduit (30), the lower extremity of which forms a moving suction mouth (31) that is to be placed substantially at the level of the bed, and the upper extremity of which leads into the open air so that said mouth (31) is under atmospheric pressure, said system comprising means for carrying out a local stirring operation (41, 42, 43, 44, 53) within said mouth and discharging means (50, 51, 52) connecting said mouth (31) to the surface of said liquid environment, in which these sediments circulate.

System for removing sediments from a bed of a liquid environment such as a harbor or a pond, characterized in that it comprises a conduit (30), the lower extremity of which forms a moving suction mouth (31) that is to be placed substantially at the level of the bed, and the upper extremity of which leads into the open air so that said mouth (31) is under atmospheric pressure, said system comprising means for carrying out a local stirring operation (41, 42, 43, 44, 53) within said mouth and discharging means (50, 51, 52) connecting said mouth (31) to the surface of said liquid environment, in which these sediments circulate.

The present invention relates to a method of separating radioactive elements from a mixture, wherein the mixture is treated with at least one alkanesulfonic acid and at least one further acid, selected from the group consisting of hydrochloric acid, nitric acid, amidosulfonic acid and mixtures thereof and also the use of at least one alkanesulfonic acid and at least one further acid for separating radioactive elements from mixtures comprising these.

The present invention relates to a method of separating radioactive elements from a mixture, wherein the mixture is treated with at least one alkanesulfonic acid and at least one further acid, selected from the group consisting of hydrochloric acid, nitric acid, amidosulfonic acid and mixtures thereof and also the use of at least one alkanesulfonic acid and at least one further acid for separating radioactive elements from mixtures comprising these.

Disclosed is a method for treating water, including the extraction of at least two ionic species, the ionic species including an anionic species and a cationic species and being present in the water to be treated, the method especially including a step of mixing a liquid hydrophobic organic phase and the water to be treated, the water to be treated being in the liquid state, in order to subsequently obtain liquid treated water and a hydrophobic liquid organic phase loaded with the ionic species, and a step of thermal regeneration of the organic phase loaded with chemical species. Also disclosed are compounds and compositions that can be used in the method.

A process for treating waste fluid generated during a petrochemical process. The process comprises: subjecting at least one first water-based wastewater stream to at least one freeze concentration stage so as to produce a third clean water stream and a fourth concentrated water-based wastewater stream, subjecting at least one second organic fluid-based waste fluid stream to at least one separation stage so as to produce a fifth purified product stream and a sixth concentrated organic fluid-based waste fluid stream, forwarding the fourth concentrated water-based wastewater stream and the sixth concentrated organic fluid-based waste fluid stream to an incinerator, and incinerating the streams in the incinerator. The process is controlled such that incineration of the sixth concentrated organic fluid-based waste fluid stream generates at least 70% of an energy necessary to incinerate the fourth concentrated water-based wastewater stream.

A process for treating waste fluid generated during a petrochemical process. The process comprises: subjecting at least one first water-based wastewater stream to at least one freeze concentration stage so as to produce a third clean water stream and a fourth concentrated water-based wastewater stream, subjecting at least one second organic fluid-based waste fluid stream to at least one separation stage so as to produce a fifth purified product stream and a sixth concentrated organic fluid-based waste fluid stream, forwarding the fourth concentrated water-based wastewater stream and the sixth concentrated organic fluid-based waste fluid stream to an incinerator, and incinerating the streams in the incinerator. The process is controlled such that incineration of the sixth concentrated organic fluid-based waste fluid stream generates at least 70% of an energy necessary to incinerate the fourth concentrated water-based wastewater stream.

An environmental remediation system includes a contaminate treatment mat assembly to extract contaminates in pore water and sediment. The mat assembly includes a flexible liner and pore water and sediment-penetrating chambers individually anchored to the flexible liner. The anchored chambers include lids that are positioned above the liner and containers below the liner. The system includes a plate subsystem including plate holes. The plate subsystem is configured to have the mat assembly removable attached thereunder, absorb impact forces from a delivery system, translate the impact forces into a driving force applied simultaneously to tops of the lids of all the pore water and sediment-penetrating chambers under the plate subsystem to cause penetration of the containers into underlying pore water and sediment, and simultaneously displace fluid through liner holes of the liner and the plate holes. A method for environmental remediating using the system is also provided.

An environmental remediation system includes a contaminate treatment mat assembly to extract contaminates in pore water and sediment. The mat assembly includes a flexible liner and pore water and sediment-penetrating chambers individually anchored to the flexible liner. The anchored chambers include lids that are positioned above the liner and containers below the liner. The system includes a plate subsystem including plate holes. The plate subsystem is configured to have the mat assembly removable attached thereunder, absorb impact forces from a delivery system, translate the impact forces into a driving force applied simultaneously to tops of the lids of all the pore water and sediment-penetrating chambers under the plate subsystem to cause penetration of the containers into underlying pore water and sediment, and simultaneously displace fluid through liner holes of the liner and the plate holes. A method for environmental remediating using the system is also provided.