This invention relates generally to zeolites and polymer compositions with zeolites having enhanced adsorption capacity for adsorption of water, ammonia and other similar compounds. The invention is directed particularly to aluminosilicate zeolites, and methods for preparing zeolite entrained polymer compositions having enhanced water adsorption properties. This invention relates also to improved packaging materials with enhanced water adsorption properties incorporating the polymer compositions containing zeolites.

Described here is a free-standing composite particle with a large surface area. The particle is capable of adsorbing heavy metal contaminants from water. The particle itself is comprised of a granular activated carbon particle to which are attached one or more carbon nanotubes, the combination of which is covered by at least a partial thin film of polydopamine or other polymeric material derived from dopamine-like compounds. The composite particles are mixed with contaminated water, after which the water and particle mixture is injected into a hydrocyclone separator specifically designed for use with the composite particle. The hydrocyclone separator removes the particles from the water, allowing the particles holding the contaminants to be extracted for treatment, while the purified water flows out of the separator for reuse. The separated particles can be treated to remove all the adsorbed contaminants, after which the reclaimed particles may be reused.

Disclosed are polymer compositions comprising activated carbon and method of making the polymer compositions that are used for sorption of formaldehyde from air, gas or liquids. The activated carbon is entrained in at least one base polymer with optional channels throughout.

Disclosed is an absorbent containing an amine for absorption of an acid gas in a biogas, and a biogas purification system using the same.

A composition that absorbs oxygen and emits carbon dioxide in response to absorbing oxygen including ascorbic acid, an organic acid, a catalyst that promotes oxidation of the organic acid and emission of carbon dioxide and a soluble transition metal salt characterized by multiple oxidation states.

One or more embodiments relates to method for generating CHEFS having the steps of generating the CHEFS from a dope. One or more embodiments relates to a method for generating CHEFS having amine functional groups having the steps of generating a dope containing a BIAS with amine groups, at least one polymer, and at least one solvent; and forming CHEFS from the dope, wherein the generated CHEFS have no more than 30% amine loss compared to the BIAS.

Water-absorbent resin particles having a feeding retention rate of 10% or more are disclosed, the feeding retention rate being represented by the following formula using a feeding rate through a dry powder measured by a method including the steps (A), (B), and (C) in this order, and a feeding rate through a swollen gel measured by a method including the steps (A), (B), (D), and (E) in this order.

Feeding retention rate (%)=(feeding rate through swollen gel/feeding rate through dry powder)×100

Water-absorbent resin particles 10a, in which a gel flow rate measured by the following procedures having (1) to (3) is 10 to 70 g/min: (1) mixing 1 part by mass of the water-absorbent resin particles and 199 parts by mass of water to obtain a gel, (2) accommodating the gel in a funnel in a state where a circular lower end opening with a diameter of 8 mm in the funnel is closed, and (3) measuring an outflow amount of the gel per unit time after a lapse of 3 minutes from opening of the lower end opening as the gel flow rate.

Nanocomposite materials are described herein which, in some embodiments, are employed as separation media for removal of various contaminants from water sources, including heavy metals, PFAS and/or NOM. In some embodiments, a nanocomposite material comprises oligomeric chains or polymeric chains covalently attached to surfaces of fluorographite at sites of defluorination. In another aspect, nanocomposite materials based on cellulose nanofibers are described herein. In some embodiments, a nanocomposite material comprises oligomeric chains or polymeric chains covalently attached to surfaces of cellulose nanofibers.

High-capacity dispensable moisture and hydrogen getter to be used as sealant and/or to control the level of these substances in electronic or optoelectronic sensitive devices, its use for the hermetic sealing or semi-hermetic sealing of such electronic or optoelectronic sensitive devices and a method to control the level of contaminants within them.