There are provided a porous membrane including a perfluoroalkoxy alkane (PFA)-based melt-extruded film and having pores controlled by biaxial stretching, and a manufacturing method therefore. The porous membrane is for water treatment and includes a fluoropolymer. The method includes forming a film by melt-extruding a fluoropolymer; and controlling the pore size of the formed film by biaxial stretching. The membrane for water treatment is based on a fluoropolymer and has physical properties that are resistant to high temperatures and strong acids, and it is able to be used for treatment of wastewater such as semiconductor wastewater.

A system and method of applied radial technology chromatography using a plurality of beads is disclosed, with each bead comprising one or more pores therein having a diameter of about 250 Å to about 5000 Å, and each bead having an average radius between about 100 μm to about 250 μm. Also disclosed are processes for selecting beads for use in a radial flow chromatography column, and for purifying an unclarified feed stream using a radial flow chromatography column.

The disclosure relates to N-alkyl-D-glucamine based macroporous polymeric cryogels with three-dimensional structure and with interconnected pores, which are used for sequestering and/or removing toxic contaminants, such as toxic metalloids and/or toxic heavy metals, for example from water and/or soil and the method for the preparation of said -alkyl-D-glucamine based macroporous polymeric cryogels.

Devices and methods utilizing sorbent polymer composite materials in the form of at least one sheet. The at least one sheet can have a plurality of perforations that aids in the formation of an internal liquid network. In some embodiments, each perforation of the plurality of perforations has a size ranging from 0.1 mm to 6.5 mm and the at least one sheet has a perforation density ranging from 0.14% to 50% based on a total surface area of the at least one sheet.

Provided is a zeolite membrane composite used for separation of a mixture, which has a high separation factor and is easily produced while maintaining a practically usable permeation flow rate. The zeolite membrane composite includes: a porous support; and an aluminosilicate zeolite membrane formed on a surface of the porous support and having a framework density of 10 or more and 17 or less. A Si/Al molar ratio of a surface of the zeolite membrane is 5 or more, and a ratio (A.sub.e/A.sub.0) of a developed membrane area A.sub.e in consideration of unevenness on the surface of the zeolite membrane to an apparent membrane area A.sub.0 not in consideration of the unevenness on the surface of the zeolite membrane is 2 or more and 20 or less.

Polymeric sorbents for aldehydes including formaldehyde and acetaldehyde are provided. More particularly, the polymeric sorbents are sulfonic acid-containing polymeric materials with impregnated urea-based compounds. Additionally, methods of making the polymeric sorbent, methods of sorbing aldehydes (i.e., aldehydes that are volatile under use conditions) on the polymeric sorbents, compositions resulting from the sorption of aldehydes on the polymeric sorbents, and filters containing the polymeric sorbents are provided.

Provided is a novel porous cellulose medium that can efficiently separate a large target molecule in a calibration standard. A porous cellulose medium including a porous cellulose particle having a particle size from 1 to 600 μm, wherein, in sieving the porous cellulose medium for classification and using a fraction corresponding to aperture openings between 53 μm and 106 μm as a support for size exclusion chromatography, a polyethylene oxide standard is run through size exclusion chromatography with pure water as a mobile phase, and a weight average molecular weight Mw and a gel partition coefficient K.sub.av of the polyethylene oxide standard satisfy Relationships (A) and (B) above:

in a case where 4.80≤log Mw≤5.50,K.sub.av>−0.445×log Mw+2.55  (A)

in a case where 5.75≤log Mw,0≤K.sup.av<0.19  (B).

According to an example aspect of the present invention, there is provided a method of capturing and analyzing of colloidal microplastics and nanoplastics from aqueous medium. More precisely, the invention relates to a method for collecting and analyzing colloidal nano- and microplastic particles from aqueous media using nanoscaled lignocellulosic structures.

Disclosed are embodiments of a filter unit containing a water adsorbent material in the form of water adsorbent particles in a packed bed and a gas adsorbent material in the form of gas adsorbent particles in a packed bed. In embodiments, the gas adsorbent material is downstream from the water adsorbent material in a direction of operation. Further disclosed are methods of preparing and using the filter units.

A reversible enrichment material, its preparation and application thereof are provided. The reversible enrichment material includes an inorganic carrier; and an active metal salt, a first metal salt promoter and a second metal salt promoter supported on the inorganic carrier. The active metal salt is a soluble silver salt, a soluble copper salt, or a combination thereof. The first metal salt promoter is one or more selected from the group consisting of soluble salts of Group IA, Group IIA and Group IIIA metals, and the second metal salt promoter is one or more selected from the group consisting of soluble salts of transition metals other than Group IB metals. The reversible enrichment material can realize effective separation of saturated hydrocarbon from unsaturated hydrocarbon and has good reversibility.