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 honeycomb filter comprising a pillar-shaped honeycomb structure body having a porous partition wall and a plugging portion, wherein, in a pore diameter distribution of the partition wall, in the case where the pore diameter (m) whose cumulative pore volume is 10% of the total pore volume is denoted by D10, the pore diameter (m) whose cumulative pore volume is 50% of the total pore volume is denoted by D50, and the pore diameter (m) whose cumulative pore volume is 90% of the total pore volume is denoted by D90, all of the following equations (1) to (6) are satisfied.
8.4 m<D10(1)
17.5 m<D50<24.0 m(2)
D90<55.2 m(3)
(log D90log D10)/log D50<0.60(4)
log D90/log D50<1.30(5)
log D50/log D10<1.38(6)

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.

A drainage apparatus for material cleaning and dewatering, the apparatus comprising one or more void structures, wherein the one or more void structures comprises a plurality of apertures configured to allow liquid to permeate the one or more void structures and one or more structural apertures, one or more columns, wherein the one or more columns are defined by the one or more structural apertures and a wear surface having a first side and a second side of the wear surface, wherein the first side of the wear surface is positioned proximate the one or more columns and the second side of the wear surface is positioned proximate a work product.

A network structure having a novel structure is obtained by firing an aggregate of silica gel particles. The network structure includes a plurality of granular portions formed of silica and a plurality of joining portions formed of silica and connecting the granular portions to form a three-dimensional mesh-connected continuum together with the granular portions. For example, the network structure may be formed on a base material having air permeability.

An air filter comprises: a first filter frame in which a plurality of first chambers are formed; a second filter frame in which a plurality of second chambers are formed and which is arranged at the rear of the first filter frame; and a filter material which is accommodated in the plurality of first chambers and the plurality of second chambers to filter air, wherein the first filter frame and the second filter frame are arranged so that, when seen from the front, the center of each of the plurality of second chambers is out of line with the center of each of the plurality of first chambers, in the vertical direction.