The present invention relates to a membrane for removing heavy metals present in water or other solutions contaminated with said heavy metals, wherein said membrane comprises carbon nanomaterials and a mixture of natural biopolymers, preferably nanocellulose, carbon nanotubes and diatom biomass. The present invention also comprises a method for obtaining said membrane, and a method for removing heavy metals in water or other solutions comprising the use of said membrane.

The present disclosure relates to a process, a system and a use for removing micropollutants (1) in liquid (2). The process comprises providing liquid (2) to a container (3) adapted to hold a liquid and/or a gas, providing magnetic activated carbon (4), mixing it, separating the magnetic activated carbon (4) using a magnetic separator (5), removing between 1 and 100% of the separated used magnetic activated carbon (4), removing the liquid (2), providing new liquid (2) to the container (3), providing the used magnetic activated carbon (4) to the container (3), adding between 1 and 100% of unused magnetic activated carbon (4), repeating the mixing and separation steps at least one time. The process allows for control of several parameters, such as the flow rate of the liquid, dosage of MAC and ratio used/unused MAC required to remove micropollutants from the liquid.

The present disclosure relates to functionalized carbon-based adsorbents for use in selective removal of paraffin impurities from a light paraffins/olefins mixture, in particular at ambient/normal conditions of temperature and pressure. The carbon-based adsorbent comprises a carbonaceous based material functionalized at least in part on active sites thereof with functional groups configured to selectively adsorb the light paraffins from the mixture, thereby resulting in a purity of at least 99.9% of the light olefins upon separation. As described, the adsorbent may comprise activated carbon functionalized at least in part on active sites thereof with fluorine functional groups. Alternatively, the adsorbent may comprise reduced graphene oxide having at least in part on active sites thereof oxygen groups. Methods for manufacturing the absorbents and use them are also disclosed.

Disclosed are a system and process to economically regenerate activated carbon used in oxidative adsorption of gas molecules. The regenerated activated carbon can reduce mass transfer limitation of reactants of oxidative adsorption and increase overall gas adsorption rate and efficiency. The regeneration process includes a downcomer, an extractor, a decanter, a dryer, and a recirculation loop of activated carbon particles. Activated carbon particles are transferred from one unit operation to another, to complete the tasks of extraction of oxidative products, washing and cleaning of carbon particles, decanting of exterior and surface water between particles and drying the interior of particles via vaporization. Adsorption and oxidation of gas molecules with a moving bed reactor is used to complete a reaction/regeneration cycle. Removal of the rate limiting liquid from exterior voids and interior pores of activated carbon particles efficiently could enable a much higher overall rate of gas adsorption.

Methods and systems of collecting an anaesthetic agent from a collection vessel are described herein. The systems include a fluid storage tank and a collection vessel housing an adsorbent material for adsorbing the anaesthetic agent. The collection vessel is configured to receive the heated fluid from the fluid storage tank, the heated fluid having a temperature and a pressure sufficient to thermally desorb the anaesthetic agent from the adsorbent material. The system also includes a heat exchanger configured to receive an outlet stream from the collection vessel comprising the anaesthetic agent and cool the outlet stream to a temperature below a threshold temperature to produce a liquid stream comprising the anaesthetic agent. The system also includes an accumulator configured to receive the liquid stream and separate the liquid stream into a waste stream and a collection stream, the collection stream comprising the anaesthetic agent.

Use of poly(alkylamine)-derived (PAD) self-supported cross-linked polymeric ammonium salts and ionomer hydrogels for adsorbing and desorbing organic contaminants, specifically per and polyfluoro alkyl substances (PFAS) from water.

The present invention discloses a method for avoiding self combustion of carbonaceous adsorbent comprising a catalyst, the method comprising blowing air through the carbonaceous adsorbent thereby oxidizing catalyst and/or components that are in a reduced state and simultaneously cooling the carbonaceous adsorbent.

A method and system are disclosed for regenerating carbonaceous adsorbent, the method comprising the steps of: a) providing a carbonaceous adsorbent comprising a catalyst and adsorbed contaminants, b) pyrolysing of the adsorbed contaminants, c) reactivating the carbonaceous adsorbent by subjecting the carbonaceous adsorbent to steam thereby obtaining a reactivated carbonaceous adsorbent, d) cooling the thus obtained reactivated carbonaceous adsorbent to a temperature of less than 250 C. and e) oxidizing catalyst that is in a reduced state following steps b) and c) comprised in the reactivated carbonaceous adsorbent.

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.

Sorbent materials that are treated with ions, salts, oxides, hydroxides, or carbonates of calcium, magnesium, strontium, or barium are useful in removing perfluoroalkyl and polyfluoroalkyl substances (PFAS), perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS), 2,3,3,3,-tetrafluoro-2-(heptafluoropropoxy)propanoate and heptafluoropropyl 1,2,2,2-tetrafluoroethyl ether, and similar compounds from liquids and gases are disclosed. The sorbent materials with the disclosed treatments offer improved performance as measured against untreated sorbent materials.