A device for collecting contaminants from water samples is provided. The device includes a solid sorbent that collects and stores the contaminants from water samples. The solid sorbent is configured to allow for the preservation of the stored contaminants. The concentrations of the contaminants in the water samples are determined via analysis of the solid sorbent or via elution of the stored contaminants from the sorbent and analysis of the eluate solution.

Compositions and methods for adsorption of a species (e.g., ammonia, water, a halogen) comprising metal organic frameworks (MOFs) are generally provided. In some embodiments, a MOF comprises a plurality of metal ions, each coordinated with at least one ligand comprising at least two unsaturated N-heterocyclic aromatic groups arranged about an organic core.

A method of recovering crude oil from crude oil drenched adsorbent and simultaneously regenerating the adsorbent to render it suitable for re-use in crude oil adsorption. The method includes contacting crude oil drenched adsorbent, in the form of solid nanofibrous expanded polystyrene drenched with adsorbed crude oil, with a non-polar solvent, thereby obtaining regenerated crude oil lean adsorbent and crude oil rich solvent.

The subject matter of the present invention consists of formo-phenolic resins, a method for the preparation thereof, and the use of same in the extraction of uranium from an aqueous sample. The present invention also relates to novel formo-phenolic resins.

The invention relates to regenerative, solid sorbents for adsorbing carbon dioxide from a gas mixture, including air, with the sorbent including a modified polyamine and a solid support. The modified polyamine is the reaction product of an amine and an epoxide. The sorbent provides structural integrity, as well as high selectivity and increased capacity for efficiently capturing carbon dioxide from gas mixtures, including the air. The sorbent is regenerative, and can be used through multiple cycles of adsorption-desorption.

The present invention discloses a near-infrared regenerative intelligent fiber-based adsorptive material and a preparation method and use thereof. The material is obtained by chemically grafting a stepwise dual-temperature stimuli-responsive polyethyleneimine onto a carboxylated cellulose nanofiber matrix to prepare a stepwise dual-temperature stimuli-responsive intelligent nanofiber, and combining the stepwise dual-temperature stimuli-responsive intelligent nanofiber with a photosensitizer having near-infrared stimuli-response to prepare a stepwise dual-temperature/near-infrared stimuli-responsive intelligent nanofiber, and then by using a crosslinking agent to directly crosslink and combine the stepwise dual-temperature/near-infrared stimuli-responsive intelligent nanofiber with a hyperbranched polyamine in one step. The material has a stepwise dual-temperature/near-infrared stimuli-response, high density of amino group (greater than 14 mmol/g), and nano cavities.

Provided herein are devices, systems, and methods for capturing toxic pollutants, such as polycyclic aromatic hydrocarbons. Certain embodiments of the present disclosure are related to a pollutant-absorbing material that includes an absorbent compound, such as sodium copper chlorophyllin, capable of binding to and capturing a toxic pollutant, and methods of making and using the material for the capture of toxic pollutants. The pollutant-absorbing material can be incorporated into an article worn by a person, such as a shirt or a facemask.

The present disclosure relates to improved solid state sorbent materials and methods for controlling and enhancing carbon dioxide adsorption performance for selected metal-organic framework (MOF) materials. The present disclosure further relates to inventive methods using a novel class of diamine-appended metal-organic frameworks MOF absorbents displaying step-shaped adsorption isotherms with large carbon dioxide capacities. More specifically, the present disclosure relates to diamine-appended MOF materials exhibiting step-shaped adsorption isotherms that are employed in a method utilizing humidity to control and improve carbon dioxide adsorption performance. In addition, the present disclosure relates to diamine-appended MOF materials used in a process including a regeneration step with carbon dioxide and humidity level control to achieve deep carbon dioxide removal even from dilute, near ambient condition carbon dioxide streams as well as more concentrated industrial output streams spanning multiple orders of magnitude. The present disclosure also relates to scrubbing apparatus and methods employing the inventive MOF materials, methods, process steps and apparatus as disclosed to achieve rapid and deeper carbon dioxide capture without the need to pretreat column materials.

A method of modifying a chemical interaction between a functional group of an immobilized amine in a solid sorbent composition and a compound that chemically interacts with the functional group to reduce the heat required to desorb the compound from the solid sorbent. A method of inhibiting degradation of an immobilized amine in an immobilized amine solid sorbent. Compositions and methods of use of a low-cost regenerable immobilized amine solid sorbent resistant to degradation.

Polyamines with lengths carefully tailored to the framework dimensions are appended to metal-organic frameworks such as Mg.sub.2(dobpdc) (dobpdc4-=4,4′-dioxidobiphenyl-3,3′-dicarboxylate) with the desired loading of one polyamine per two metal sites. The polyamine-appended materials show step-shaped adsorption and desorption profiles due to a cooperative CO.sub.2 adsorption/desorption mechanism. Several disclosed polyamine-appended materials exhibit strong ability to capture CO.sub.2 from various compositions. Increased stability of amines in the framework has been achieved using high molecular weight polyamine molecules that coordinate multiple metal sites in the framework. The preparation of these adsorbents as well as their characterization are provided.