An apparatus is provided for regenerating an odor absorbent in a motor vehicle HVAC system. That apparatus includes a regeneration blower assembly that is connected between a heater plenum and a fresh air inlet duct of the HVAC system. Air is drawn from the passenger cabin of the motor vehicle through the heater plenum where that air is warmed. The warmed air is directed through the odor absorbent to remove odors and regenerate the odor absorbent. The warm air and the odors entrained therein is discharged through a fresh air inlet of the HVAC system.

Amine-supported mesoporous carbon and a preparation method and use thereof are provided. The preparation method includes: dissolving glucosamine hydrochloride completely in deionized water; adding aqueous colloidal silica dropwise under stirring for full dispersion; heating, stirring, and conducting evaporation to dryness; grinding to obtain a powder, adding the powder to a crucible, and conducting a hydrothermal reaction to obtain a black powder; oven-drying the black powder, and conducting carbonization in a muffle furnace in a protective gas environment to obtain a carbonized solid; adding the carbonized solid to an ammonium hydrogen fluoride solution to remove silica; repeatedly washing with deionized water, and drying in an oven to obtain nitrogen-doped mesoporous carbon (NC); adding the NC to an amine solution prepared with absolute ethanol, and stirring for full dispersion; and stirring a mixed solution in an oil bath until the absolute ethanol is completely evaporated to obtain the amine-supported mesoporous carbon.

Provided is a bead in which an adsorbent and an organic contaminant-degrading microorganism are supported, wherein an adsorbent for adsorbing organic contaminants is supported on the bead together with an organic contaminant-degrading microorganism for degrading the organic contaminants adsorbed to the adsorbent to allow for the adsorbent to remove organic contaminants in water and to allow for the organic contaminant-degrading microorganism to regenerate the adsorbent.

A carbon dioxide capture structure having a monolithic three-dimensional shape, the structure being porous with interconnected pores which are accessible from an exterior side of the structure. The structure is made of a building material including a first material and a second material. The first material is a sorbent material (e.g. functionalizable for carbon dioxide adsorption). The second material is a binder material including potassium silicate. The present disclosure also relates to a method of making the carbon dioxide structure and a method for removing carbon dioxide from a gas or fluid mixture.

Systems and methods for treating water containing PFAS are disclosed. Adsorption media may be used to remove PFAS from water. An eluent may release PFAS from loaded adsorption media to form a waste stream. An internal combustion engine may be used to mineralize PFAS in the waste stream.

A low-temperature plasma regeneration system and a low-temperature plasma regeneration method is for inactivated activated carbon, wherein the system comprises a gas supply system, a plasma reaction apparatus and a waste gas treatment apparatus, wherein the gas supply system is configured for supplying gas and water vapor; the plasma reaction apparatus comprises a top electrode, a grounded lower electrode, a regeneration reactor arranged between the electrodes, and a high-voltage alternating current power supply connected with the top electrode; a stirrer is arranged in the regeneration reactor, a gas inlet is arranged at the center position of the top of the reactor, and gas outlets are arranged around the reactor. The system of the present invention has a simple and compact structure, a convenient operation and a function of reaction-and-premix integration.

An organic solvent recovery system of the present invention includes: an organic solvent recovery device that includes a first adsorbing material, and further includes at least three treatment tanks that alternately perform an adsorption treatment of adsorbing the organic solvent and of discharging a first treated gas, a desorption treatment of desorbing the organic solvent and of discharging a desorbed gas, and a drying treatment of drying the first adsorbing material and of discharging a dry outlet gas; an organic solvent concentration device that includes a second adsorbing material, adsorbs the organic solvent from the first treated gas, discharges a second treated gas, desorbs the organic solvent with a desorbing gas, and discharges the organic solvent as a concentrated gas; and a return flow path that returns the concentrated gas.

The invention provides methods for regenerating activated carbon that have been used in absorbing per- and polyfluoroalkyl substances (PFAS) in aqueous solution. In these methods, the activated carbon is treated with a solution of base in alcohol, which has been found to impart superior properties to the activated carbon.

The invention relates to a method for regenerating at least a portion of the adsorbent medium of at least one adsorption reactor implemented in a unit for treating a fluid, said regeneration method being carried out on the site of use of the adsorption reactor and comprising: at least one step of removing at least a portion of the adsorbent medium from said at least one adsorption reactor, and at least one chemical regeneration step comprising a step of bringing said portion of adsorbent medium into contact with a regeneration solution comprising water and sodium hydroxide.

The invention also relates to a fluid-treatment method implementing the regeneration method, as well as to a fluid-treatment plant suitable for carrying out the fluid-treatment method according to the invention.

According to one aspect of the present invention, a pressure swing adsorption (PSA) device includes an adsorption tower configured to introduce hydrogen gas and adsorb impurity components in the hydrogen gas by using a pressure swing adsorption (PSA) method, an adsorbent of one layer made of activated carbon or an adsorbent of two layers in which activated carbon and zeolite are stacked being disposed in the adsorption tower, the hydrogen gas containing carbon monoxide (CO) of 0.5 vol % or more and 6.0 vol % or less and methane (CH.sub.4) of 0.4 vol % or more and 10 vol % or less as the impurity components; and a densitometer configured to detect a concentration of CO in the hydrogen gas discharged from the adsorption tower, wherein the impurity components are adsorbed and removed to cause the CO concentration measured by the densitometer to fall below a threshold.