[Problem] In an embodiment involving addition of a chelating agent in an upstream process of the process for production, such as the polymerization step, the residual ratio of the chelating agent in the final product, a particulate water-absorbing agent, is improved.

[Solution] A particulate water-absorbing agent having a poly(meth)acrylic acid (salt)-based water-absorbing resin as a main component, containing a chelating agent having a nitrogen atom and an inorganic reducing agent having a sulfur atom, wherein the particulate water-absorbing agent has a chelating agent ratio of 0.8 to 1.8, as calculated by the following procedures (a) to (c): (a) subjecting the particulate water-absorbing agent to a predetermined impact test; (b) sieving the particulate water-absorbing agent subjected to the impact test into a particle group 1 with a particle size of less than 300 μm and a particle group 2 with a particle size of 300 μm or more and less than 850 μm using a JIS standard sieve; and (c) quantifying a content C1 of the chelating agent present in the particle group 1 and a content C2 of the chelating agent present in the particle group 2, and then dividing the C1 by the C2.

An adsorbent for phosphoric acid-based anionic substances, that contains foamed glass, and that has a Ca2p concentration of 7.5 atom % or more or a Na1s concentration of 5.0 atom % or less at the surface thereof as measured by XPS analysis, and a half-width of Si2p peak of 2.4 eV or more. The adsorbent can also have a specific surface area of 45 m.sup.2/g or more or a pore volume of 2.5 cm.sup.3/g or more as measured by mercury intrusion.

An alumina grain has a single-crystal structure and has an approximate regular octahedral stereoscopic morphology. Eight sides of the alumina grain belong to the {111} family of crystal planes of γ-state alumina, and the grain size is 5-100 μm. The alumina grain is unique in crystal plane exposure and distribution, simple and feasible in preparation, and low in cost, and has higher operability, and thus has good application prospect in the field of catalysis and adsorption.

A composition comprising a compound of formula I:

##STR00001##

wherein n is 5, and R is methyl; and
the composition is in an essentially guest-free solid form.

The present technology provides an adsorbent material that includes a silicate composition, wherein the silicate composition includes a crystalline phase; wherein the silicate composition may have an interconnected porous scaffold having a total mercury (Hg) pore volume of about 0.005 cc/g to about 0.25 cc/g for pores having a diameter of about 20-10,000 Å and a total nitrogen (N) pore volume of about 0.02 cc/g to about 0.1 cc/g for pores having a diameter of about 20-600 Å.

The present invention discloses a method for increasing absorbent capacity of a superabsorbent material (SAM) by treating the SAM with a selected salt or a combination of such salts. The selected salt(s) may interact with the polymer chain of the SAM through one or more absorbent capacity enhancement mechanisms. The absorbent capacity enhancement mechanism(s) between selected salt(s) and the SAM may lead to greater absorbent capacity of the SAM.

The disclosure relates to modified wood pulp and methods using the same for removal for per- and polyfluoroalkyl substances (collectively “PFAS”) from contaminated water. Cationic-modified wood pulp can be used to adsorb anionic PFAS contaminants from water, and anionic-modified wood pulp can be used to adsorb cationic PFAS contaminants from water. The modified wood pulp has high adsorption efficiencies, rapid adsorption kinetics, and high adsorption efficiencies for a range of different PFAS contaminants.

Mineralization occurs during weathering of silicate materials/rocks rich in CA+ and Mg+, particularly peridotite which composes Earth's upper mantle. The carbon mineralization mantle peridotite is the base activated carbon for nanostructured-carbon-base-material. The nanostructured-carbon-base-material using mantle peridotite carbon mineralization based activated carbon nanotubes is a new catalyst for batteries and fuel-cell use that doesn't use precious metal such as platinum and that performs as effectively as many well-known, expensive precious-metal catalysts. The nanostructured-carbon-base-material using mantle peridotite carbon mineralization based activated carbon nanotubes makes possible the creation of economical lithium-air batteries that could power electric vehicles. The carbon nanotubes have useful qualities such as slim, strong, lightweight, high electronic conductivity, has metallic/semiconductive properties that are useful in (1) electronics i.e. wiring, transistor; (2) material that reinforced resin/metal; (3) energy source i.e. catalysis support, ion adsorption, capacitors; (4) nanotechnology i.e. nanostructure; and (5) biotechnology i.e. cell cultivating, drug delivery system, biosensor.

A novel adsorbent and contactor material based on polymer functionalized with amidoxime and alkylamines moieties. Methods of making the material are also described. The material can be easily processed into any desired sorbent geometry such as solid fibers, electrospun fibers, hollow fibers, monoliths, etc. The adsorbent exhibits a very high affinity toward acidic gases such CO.sub.2 and can be used in direct air capture, power plant-based CO.sub.2 capture, and industrial CO.sub.2 capture applications. The material can also serve as a contactor that accommodates other adsorbents within its structure.

A polymer for liquid chromatography or solid phase extraction is provided. The polymer is prepared by polymerizing styrene and divinylbenzene to form a styrene-divinylbenzene copolymer; soaking the styrene-divinylbenzene copolymer in a swelling agent to form nano-scale micropores; and soaking the microporous styrene-divinylbenzene copolymer in methanol. When packed in a chromatographic column, the polymer can be used to produce produce natural health or medicinal products from Cannabis species, for example, industrial hemp.