The moisture-resistant catalyst for air pollution remediation is a catalyst with moisture-resistant properties, and which is used for removing nitrogen compound pollutants, such as ammonia (NH.sub.3), from air. The moisture-resistant catalyst for air pollution remediation includes at least one metal oxide catalyst, at least one inorganic oxide support for supporting the at least one metal oxide catalyst, and a porous framework for immobilizing the at least one metal oxide catalyst and the at least one inorganic oxide support, where the porous framework is moisture-resistant. As non-limiting examples, the at least one metal oxide catalyst may be supported on the at least one inorganic oxide support by precipitation, impregnation, dry milling, ion-exchange or combinations thereof. The at least one metal oxide catalyst supported on the at least one inorganic oxide support may be physically embedded in the porous framework.

A contaminant removal system for removing a contaminant from an environment includes a gas separator, a scrubber-separator downstream of the gas separator, and a stripper-separator downstream of the scrubber-separator. The gas separator is configured to receive a cabin air stream from the environment and concentrate the contaminant from the cabin air stream to produce a concentrated cabin air stream. The cabin air stream includes the contaminant, and the concentrated cabin air stream has a higher concentration of the contaminant than the cabin air stream. The scrubber-separator is configured to absorb the contaminant from the concentrated cabin air stream into a liquid sorbent and discharge a clean air stream to the environment. The stripper-separator is configured to desorb the contaminant from the liquid sorbent into a contaminant stream.

Embodiments of the present disclosure are directed to systems and methods for removing formaldehyde from indoor air. Some embodiments include flowing an indoor airflow over and/or through a solid supported amine filtering medium, such that, at least a portion of formaldehyde entrained in the indoor airflow is removed therefrom. Some other embodiments include systems having one or more fans for providing velocity to one and/or another airflows (e.g., airflows to/from a formaldehyde filter).

A process for capture of carbon dioxide comprising the steps of contacting the carbon dioxide with at least one metal carbonate in an aqueous organic solvent at a predetermined temperature.

The present disclosure relates to a single-use filter component for removing NO.sub.2 in an air-treatment system, the component comprising a polymeric composition as an air-filtration medium, the polymeric composition comprising a plurality of free vinyl groups, wherein the component permits inspection of the air-filtration medium by an end-user to determine when the filter is spent, based on a white to yellow colour change, or comprises an optical sensor configured to notify the end-user of the colour change. The present disclosure further relates to a single-use filter component for simultaneously removing NO.sub.2 in an air-treatment system, wherein the component comprises a HEPA filter formed from a polymeric composition comprising a plurality of free vinyl groups. The present disclosure further relates to an air treatment system, to a method of treating air and to the use of a polymer or copolymer of divinylbenzene for forming an air-filtration medium.

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.

An air pollution prevention device applied for a baby carriage includes a sealing cover, a filtration cleaner, a gas detection module and an intelligent control and process device. The sealing cover is hooded on the baby carriage for forming a sealed space. The filtration cleaner penetrates the sealing cover form the outside of the baby carriage for introducing an outside air into the sealed space of the baby carriage and discharging an air pollution source out of the sealed space. The gas detection module detects the air pollution source and outputs gas detection data. The intelligent control and process device receives and compares the gas detection data and controls an enablement of a gas guider of the filtration cleaner for filtering and exchanging the air pollution source in the sealed space so as to generate a clean air.

A method of purifying air polluted by smoke and fumes, such as from wildfires and other hazard, may deploy a series of fluid filled vessels that act as filters to trap and/or neutralize components that would foul an aqueous suspension of gold nanoparticles that is effective in converting toxic carbon monoxide to carbon dioxide. Non-toxic fluids may be used. As the gold nanoparticles are effective in a basic solution, the solution may contain a visible pH indicator or an apparatus that deploys the method may continuously monitor the pH thereof.

A hydro-enhanced air cleaner is provided as a stand-alone unit or as a component of a heating, ventilation, air conditioning system for a building which cleans and purifies ambient air and is also capable of producing potable water in humid environments. The device includes a dehumidifier which extracts polluted humid air and produces condensate including water and pollutants which adhere to the water. A degasser is connected with the dehumidifier to purify and degas the condensate to produce deionized water and pollutants. A humidifier is connected with the degasser to vaporize at least a portion of the deionized water for delivery to a living space. Excess deionized water may be collected as a potable water supply. In accordance with a method, the apparatus is used to continuously recycle air within a building further continuously clean the air.

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.