Abstract: Methods for treating or rejuvenating a spent catalyst are disclosed. Such methods can employ a step of halogenating the spent catalyst, followed by decoking the halogenated spent catalyst. The halogenation step can utilize fluorine and chlorine together, or fluorine and chlorine can be applied sequentially.

Abstract: The present invention intends to provide a method for removing radioactive cesium, or radioactive iodine and radioactive cesium that is simple and low-cost, further does not require an energy source such as electricity, moreover can take in and stably immobilize the removed radioactive substances within a solid, and can reduce the volume of radioactive waste as necessary, and to provide a hydrophilic resin composition using for the method for removing radioactive cesium, or radioactive iodine and radioactive cesium, and the object of the present invention is achieved by using a hydrophilic resin composition containing: at least one hydrophilic resin selected from the group consisting of a hydrophilic polyurethane resin, a hydrophilic polyurea resin, and a hydrophilic polyurethane-polyurea resin each having at least a hydrophilic segment; and a clay mineral dispersed therein in a ratio of at least 1 to 180 mass parts relative to 100 mass parts of the hydrophilic resin.

Abstract: Methods for filling a container with hazardous waste are disclosed. One method includes moving the container to a position where a filling head adds solid hazardous waste to the container, coupling a lid to the container to close the container while the container is at the position, and moving the closed container away from the position. Another method includes aerating dry cementitious material in the container with a mixer, adding hazardous waste to the container, mixing the cementitious material and the hazardous waste with the mixer, and controlling the speed of the mixer.

Abstract: Provided is a separating agent comprising a carrier and a ligand fixed on a surface of a carrier by chemical bonding, in which the carrier is a core-shell particle formed of a non-porous core and a porous shell, the shell having a pore diameter of 9 nm or more and formed of a hydrolysate of polyalkoxysiloxane, and the ligand is an optically active polymer, optically inactive polyester, protein, nucleic acid, or optically active organic compound with a molecular weight of 50 to 1000.

Abstract: The present invention refers to a method and related plants for removing, by means of redox reactions, the 137Cs from polluted EAF dusts, with an initial average value of radioactivity concentration either higher or lower than 10,000 Bq/kg, the decontamination from the 137Cs initially present in the EAF dusts having a yield of 98%-100%; the present invention also refers to the use of chemical-physical destabilization agents, by means of redox reactions, for obtaining EAF dusts decontaminated from 137Cs.

Abstract: The present invention relates to a method for granulation of an absorbent and adsorbent granules prepared by the same. The method comprises the steps of blending sodium metasilicate, metakaoline and an inorganic ion exchange material in water to form a slurry; decanting the resulted slurry onto a nylon cloth of 300 to 400 meshes and natural drying at ambient temperature to solidification; then breaking the solidified final product and sieving it by a screen having a mesh size of from 0.2 to 2.5 mm to provide the absorbent granules having excellent absorbability.

Abstract: Process and apparatus for granulation of a liquid phase, wherein a polydispersed flow of droplets of said liquid phase is generated, with descending motion in contact with solidification air along a substantially vertical granulation path, and wherein inside said polydispersed flow, small-sized droplets solidify producing solid particles, and said solid particles grow by collision with other droplets of liquid; in some embodiments the product obtained with this new granulation method can be grown with the conventional method.

Abstract: Certain exemplary embodiments can provide a system, machine, device, manufacture, circuit, composition, and/or user interface adapted for and/or resulting from, and/or a method and/or machine-readable medium comprising machine-implementable instructions for, activities that can comprise and/or relate to, in a treatment zone, reacting an oxygen-comprising gas, one or more selected ferric/ferrous chelates, one or more selected nitrates and/or nitrites, and/or anaerobic wastewater.

Abstract: Provided is a practical method for dry-separating arsenic compounds from a used NOx removal catalyst contaminated with arsenic. The method for removing arsenic compounds comprises heat-treating a NOx removal catalyst contaminated with arsenic compounds at a predetermined temperature in a reducing atmosphere while exposing the catalyst to hydrocarbon compounds (except CH4) or oxygen-containing carbon compound.

Abstract: A process for reducing a radioactive material of an object containing a radioactive material to a safe level in a living environment includes releasing pressure including carrying out a heating process on an aqueous liquid that includes water, water-soluble liquid, or a mixture of water and water-soluble liquid, and the object in a state where temperature is less than or equal to a critical temperature of the aqueous liquid and pressure is greater than or equal to a saturated vapor pressure of the aqueous liquid when the object is immersed in the aqueous liquid to such a degree that the object is covered or to a greater degree and then abruptly releasing the pressure, and separating, after the releasing pressure, the mixture of the object and the aqueous liquid into liquid and solid.

Abstract: A water absorbing material contains a water-absorbent material consisting of at least one of plastic and fluff pulp that are obtained by separating a water-absorbent polymer from a sanitary article containing the plastic, the fluff pulp and the water-absorbent polymer. The weight ratio of the water-absorbent polymer adhering to the water-absorbent material with respect to the water-absorbent material is 3% or less.

Abstract: Evaporative crystallization process to make salt compositions which comprises a step wherein a mother liquor is formed containing water and the salt to be crystallized and 1-5 ppm of an additive, based on the weight of the mother liquor, said additive being a water-soluble acrylic polymer, and a further step of evaporating the water to form crystallized salt.

Abstract: To provide an air electrode material powder for a solid oxide fuel cell, comprising a novel LSCF powder having a highly uniform composition suitable as an air electrode material for a solid oxide fuel cell, and its production process. A composite oxide having a perovskite structure and containing lanthanum, strontium, cobalt, iron and oxide, wherein the dispersion point determined by the peak intensity [La] of the L?1 characteristic X-ray of lanthanum and the peak intensity [Sr] of the L?1 characteristic X-ray of strontium as obtained by EPMA measurement, is present within a range of the formula (1) and the dispersion point determined by the peak intensity [Co] of the K?1 characteristic X-ray of cobalt and the peak intensity [Fe] of the K?1 characteristic X-ray of iron is present within a range of the formula (2): a[La]?150?[Sr]?a[La]+150??(1) b[Co]?300?[Fe]?b[Co]+300??(2) wherein 0.2?a?1.0 and 0.1?b?4.0.

Abstract: Compositions with sodium carboxymethylcellulose and hydroxyethyl cellulose are provided for environmentally safe disposal of water-based latex and acrylic formulations. Improved methods for environmentally safe disposal of water-based latex and acrylic formulations are provided as well.

Abstract: A hydrothermal oxidation device for treatment of a material in a supercritical medium includes a main body, an internal tube installed inside the main body to form an annular zone along the main body, a stirring mechanism installed in an internal zone of the internal tube and actuated by a rotating shaft, a cooling mechanism to cool the treated material located in the internal zone of the internal tube, an inlet for water and oxidant mix, an effluents outlet, an inlet for material to be treated, located at one end of the main body, this inlet opening up into the internal tube. The oxidation device includes an inlet for a diluted effluent, located in the flange and connected to a preheating coil arranged along an internal wall of the main body and extending from its first end to its second end, the preheating coil opening up into the internal tube.

Abstract: A process for encapsulating a radioactive object to render the object suitable for shipment and/or storage, and including the steps of preparing a plastic material, causing the plastic material to react with a foaming agent, generating a foaming plastic, encapsulating the radioactive object in the foaming plastic, and allowing the foaming plastic to solidify around the radioactive object to form an impervious coating.

Abstract: A method to recover caustic from a caustic waste stream comprises reducing the temperature of a caustic waste stream comprising dissolved Na2CO3 to a temperature less than or equal to the temperature at which the Na2CO3 precipitates from the caustic waste stream to form a caustic waste stream comprising precipitated Na2CO3 and separating the precipitated Na2CO3.

Abstract: Apparatus and a method for decomposing a body of a deceased person, as an alternative to traditional cremation. The apparatus includes a primary vessel where the body is treated with a highly basic solvent to render the body into skeletal remains and liquid remains. A clamp is applied to the skull during processing for solvent access to the skull. A secondary vessel is used to receive the liquid remains from the primary vessel and further treat them. During this further treatment, the skeletal remains left in the primary vessel after the liquefied portion has been transferred to the secondary vessel, can be treated to be decolorized and deodorized, and then returned to the decedent's next of kin as ash-like material.

Abstract: A chlorite salt-absorbent particle is prepared by absorbing a water soluble chlorite salt or a concentrated chlorite salt solution in an absorbent particle. The absorbent can be a silica gel particle or other particulate absorbent that can release the chlorite salt as an aqueous solution over time by simply contacting the chlorite salt-absorbent particle with water. The chlorine salt is extracted from the chlorite salt-absorbent particle over a period of minutes while being flushed with water. A chlorine dioxide generator in the form of a cartridge includes the chlorite salt-absorbent particles and an acid resin or a redox resin. Water can be introduced into an inlet of the cartridge and passes sequentially through the chlorite salt-absorbent particles and the acid resin or the redox resin with the discharge of a chlorine dioxide solution from the outlet of the cartridge.

Abstract: Using crystalline silica, mixed with cement powder, to reduce the heating of the cement paste caused by the hydration of said powder, during a process of packaging of radioactive waste, a formulation for the packaging of radioactive waste by cementing, which comprises such silica, a method for packaging radioactive waste implementing this formulation, and a package for packaging of radioactive waste which is obtained by this method.