A porous composite includes a porous base material, and a porous collection layer. The collection layer is provided on the base material. The collection layer contains praseodymium oxide.

A filter medium for removing contaminants from water includes a matrix including a plurality of fibers having an electrostatic charge such that the matrix is configured to remove contaminants from water by electrostatic attraction. The filter medium further includes a filler material including a ceramic substrate containing a mineral. The filler material is embedded in the matrix. When water flows through the filter medium, the mineral at least partially dissolves in the water such that a cavity is formed in the matrix in a location of the at least partially dissolved mineral.

A paste for ceramic 3D shaping according to the present invention is a paste for ceramic 3D shaping containing a curable resin and inorganic particles, in which the inorganic particles contain ceramic particles and glass particles.

A porous composite structure including a substrate including a plurality of nanostructures; a particle layer disposed on a surface of the substrate; and a liquid, a method of preparing the porous composite structure, an article including the porous composite structure, and an air purifier including the porous composite structure.

Some embodiments of the present disclosure relate to a method of regenerating at least one filter medium comprising: providing at least one filter medium, wherein the at least one filter medium comprises: at least one catalyst material; and ammonium bisulfate (ABS) deposits, ammonium sulfate (AS) deposits, or any combination thereof; flowing a flue gas stream transverse to a cross-section of a filter medium, such that the flue gas stream passes through the cross section of the at least one filter medium, wherein the flue gas stream comprises: NOx compounds comprising: Nitric Oxide (NO), and Nitrogen Dioxide (NO.sub.2); and increasing an NOx removal efficiency of the at least one filter medium after removal of deposits.

In an exhaust gas purification filter, a partition wall has communicating pores. Each communicating pore has a surface opening on the gas-inflow-side surface and a plurality of portions, each portion having a diameter being reduced and then increased from the surface opening, one of the portions, whose diameter is the smallest, being defined as an inlet neck portion. As viewed in cross section in a thickness direction of the partition wall, the surface opening of each communication pore has a diameter defined as a surface opening diameter, the inlet neck portion of each communication pore has a diameter defined as an inlet neck diameter. The inlet neck diameter is smaller than the surface opening diameter, and an average value of the inlet neck diameters is 15 μm or less. A surface opening ratio of the communicating pores in plan view of the gas-inflow-side partition wall surface is 40% or more.

Systems, devices, and techniques described herein relate to iron-based desalination of water. In some cases, an inflow of water including chlorine and sodium can be received. A plurality of iron nanoparticles may capture the chlorine and the sodium. The iron nanoparticles may at least partially include Zero Valent Iron (ZVI). An outflow of the water may be emitted. The chlorine and the sodium may be omitted from the outflow.

A multicomponent granular absorbent blend formed of at least a plurality of components with at least one of the components formed of smectite-containing, preferably bentonite-containing, absorbent granules, and at least one other of its components formed of absorbent granules comprised of an extrudate. Such an extruded-containing absorbent granule component can be a component formed of extruded pellets covered with an outer absorbent coating preferably composed of smectite, more preferably bentonite, and/or can be a component formed of extruded pellets used without any such smectite, preferably bentonite, outer coating producing uncoated absorbent granules which also are dust-adhering thereby reducing airborne dust in the multicomponent blend. Such a component composed of uncoated dust-adhering absorbent granules can be formed of extruded splayed pellets having at least one lobe and/or fibrillated tendrils enhancing both absorption and dust pickup in the multicomponent blend.

In a porous composite, a base material has a honeycomb structure whose inside is partitioned into a plurality of cells. In the plurality of cells, a plurality of first cells whose one ends in the longitudinal direction are sealed, and a plurality of second cells whose other ends in the longitudinal direction are sealed are arranged alternately. A collection layer covers inner surfaces of the plurality of first cells. An overall Sa that is an arithmetical mean height Sa indicating a surface roughness of a surface of the collection layer in the plurality of first cells is greater than or equal to 0.1 μm and less than or equal to 12 μm. An overall mean thickness that is a mean thickness of the collection layer in the plurality of first cells is greater than or equal to 10 μm and less than or equal to 40 μm.

A filter material composing a ceramic clay having an interconnected network of pores formed from cellulose fiber combustion is useful for removing chemical and biological contaminants from a water supply. Coating the ceramic clay with lanthanum enhances the removal of anionic species of As(V), As(III), Cr(VI), microbes and virus.