This invention relates to a device comprising polyethylene sulfone (PES) and additional suitable polymers with high load of Prussian blue analogue nanoparticles for removal of monovalent or divalent cation contaminants, optionally doped, and process for the preparation and methods for use thereof. The device and method relate to selectively and effectively remove ammoniacal nitrogen removal and recovery as a valuable resource, and removing radioactive cesium and/or other monovalent or divalent cations from contaminated water.

An ion exchange system includes one or more strategies to reduce the amount of hydrogen gas inside an ion exchange column when the column is offline or disposed of. The ion exchange system comprises an ion exchange column including a housing and ion exchange media positioned in the housing. The ion exchange column can include one or more of the following: (1) an oxide material that limits the production of hydrogen gas from radiolysis, (2) a hydrogen scavenging material that removes or scavenges hydrogen gas inside the column, and (3) a hydrogen catalytic material that catalyzes the reaction of hydrogen and oxygen inside the column.

A method for preparing an adsorption unit for lithium recovery and use of the adsorption unit. The method includes preparation of an adsorption unit by performing extrusion forming on pulverized lithium adsorbent resin or a lithium adsorbent precursor and an adhesive, the adsorption unit has both high selectivity and adsorption amount of the lithium adsorbent resin and can achieve high-efficiency adsorption of lithium in water with an ultra-low lithium content, and when the adsorption unit is used for adsorbing lithium in the water with the ultra-low lithium content, the entire adsorption process is simple, the desorption efficiency is high and the cost is low.

A method for preparing an adsorption unit for lithium recovery and use of the adsorption unit. The method includes preparation of an adsorption unit by performing extrusion forming on pulverized lithium adsorbent resin or a lithium adsorbent precursor and an adhesive, the adsorption unit has both high selectivity and adsorption amount of the lithium adsorbent resin and can achieve high-efficiency adsorption of lithium in water with an ultra-low lithium content, and when the adsorption unit is used for adsorbing lithium in the water with the ultra-low lithium content, the entire adsorption process is simple, the desorption efficiency is high and the cost is low.

An endotoxin adsorbent comprising a silica monolith having a nitrogen atom-containing cationic group has a sufficient ET adsorption capacity in practice. The silica monolith may have through-holes interconnected therein, and the ends of the through-holes are open to the outside of the silica monolith. The nitrogen atom-containing cationic group is bonded to the silica monolith through or without a spacer or a crosslinking agent.

An endotoxin adsorbent comprising a silica monolith having a nitrogen atom-containing cationic group has a sufficient ET adsorption capacity in practice. The silica monolith may have through-holes interconnected therein, and the ends of the through-holes are open to the outside of the silica monolith. The nitrogen atom-containing cationic group is bonded to the silica monolith through or without a spacer or a crosslinking agent.

Process for the preparation of particles with antibacterial coating, which comprises the following steps: (a) providing an aqueous suspension containing a polyamine, a crosslinker and a porous organic or inorganic carrier material in particle form at a temperature lower than or equal to 10 C. in a mixer for coating the inorganic carrier material with the polyamine; (b) crosslinking the organic polymer in the pores of the inorganic carrier material and simultaneously removing water.

Process for the preparation of particles with antibacterial coating, which comprises the following steps: (a) providing an aqueous suspension containing a polyamine, a crosslinker and a porous organic or inorganic carrier material in particle form at a temperature lower than or equal to 10 C. in a mixer for coating the inorganic carrier material with the polyamine; (b) crosslinking the organic polymer in the pores of the inorganic carrier material and simultaneously removing water.

Process for the preparation of particles with antibacterial coating, which includes the following steps: (a) providing an aqueous suspension containing a polyamine, a crosslinker and a porous organic or inorganic carrier material in particle form at a temperature lower than or equal to 10 C. in a mixer for coating the inorganic carrier material with the polyamine; (b) crosslinking the organic polymer in the pores of the inorganic carrier material and simultaneously removing water.

Process for the preparation of particles with antibacterial coating, which includes the following steps: (a) providing an aqueous suspension containing a polyamine, a crosslinker and a porous organic or inorganic carrier material in particle form at a temperature lower than or equal to 10 C. in a mixer for coating the inorganic carrier material with the polyamine; (b) crosslinking the organic polymer in the pores of the inorganic carrier material and simultaneously removing water.