The present invention provides novel chromatographic materials, e.g., for chromatographic separations, processes for its preparation and separations devices containing the chromatographic material; separations devices, chromatographic columns and kits comprising the same; and methods for the preparation thereof. The chromatographic materials of the invention are high purity chromatographic materials comprising a chromatographic surface wherein the chromatographic surface comprises a covalently-bonded surface group and one or more ionizable modifier.

A product for adsorbing one or more heavy metals from a liquid is disclosed. The product may comprise attapulgite that has been surface functionalized with a surface coating agent that includes one or more mercury affinity functional groups that chemically bond to the attapulgite surface, wherein the weight percentage of components of the product includes: 91-99 wt. % attapulgite and 1-9 wt. % surface coating agent that includes the one or more mercury affinity functional groups. The product has a surface area in the range of 115-145 m.sup.2/g as measured using the BET method. The heavy metal includes mercury and/or lead. Also disclosed is a method of producing the product and a method of adsorbing at least one heavy metal in a liquid using the product.

A porous adsorbent structure that is capable of a reversible adsorption and desorption cycle for capturing CO.sub.2 from a gas mixture comprises a support matrix formed by a web of surface modified cellulose nanofibers. The support matrix has a porosity of at least 20%. The surface modified cellulose nanofibers consist of cellulose nanofibers having a diameter of about 4 nm to about 1000 nm and a length of 100 nm to 1 mm that are covered with a coupling agent being covalently bound to the surface thereof. The coupling agent comprises at least one monoalkyldialkoxyaminosilane.

Guanidine-functionalized perlite particles are provided. Nonwoven articles are also provided, including a fibrous porous matrix and guanidine-functionalized perlite particles enmeshed in the fibrous porous matrix. Laminated articles are additionally provided, including a first substrate and a second substrate sealed to the first substrate along at least a portion of a perimeter of the first substrate. The laminated article further includes guanidine-functionalized perlite particles disposed between the first substrate and the second substrate. Methods of detecting microorganisms or target cellular analytes in a fluid sample using guanidine-functionalized particles or laminated articles are also provided.

A carrier for blood component adsorption enables selective and efficient adsorption removal of granulocytes and monocytes and, at the same time, enables adsorption removal of inflammatory cytokines. The carrier for blood component adsorption includes a water-insoluble carrier having a surface to which a functional group(s) containing a silyl group and an amino group is/are introduced.

The disclosure relates to the design and synthesis of selected ligands, dendrimers, polymers and other solid phase substrates for selective chelation of rare earth elements (i.e. lanthanides), and use of those selective ligands for synthesis of resins, polymers and other types of solid supports for separation and recovery of lanthanides from aqueous media. Recovery of critical elements from aqueous media occurs in a simple two-step process: pre-concentration of REE on the adsorbent and recovery by acid elution. The present invention can be used for design of selective ligands immobilized on solid substrates for extraction of various constituents, such as lanthanides, actinides, radionuclides, trace metals, etc., from aqueous media.

The invention relates to a magnetic mesoporous material based on functionalised silica (3MS-f), the method comprising the steps of: i) hydrolysing and precondensing, in an acid medium, a silica precursor (SiO.sub.2) in the presence of a porogen compound having the formula (POE).sub.n-(POP).sub.m-(POE).sub.n wherein: -POE is a polyoxyethylene block; -POP is a polyoxypropylene block; -n is equal to 20 or 106 and -m is equal to 70; ii) incorporating silica-coated superparamagnetic iron nanoparticles into the precondensed mixture obtained in step i) and continuing the condensation; iii) removing the porogen agent from the obtained condensed structure, whereby an organised magnetic mesoporous material based on silica (3MS) is obtained; iv) functionalising the material (3MS) obtained in the preceding step by covalently grafting at least one reactive function that is capable of forming a weak bond with at least one organic molecule of interest (MIO), the weak bond being selected in particular from among electrostatic bonds between oppositely charged groups such as carboxylate/ammonium, phosphonate/ammonium or sulphonate/ammonium and hydrophobic bonds such as bonds between alkyl chains or between aromatic groups; v) optionally, recovering the functionalised magnetic mesoporous material based on silica (3MS-f) obtained in the preceding step.

A product for adsorbing one or more PFAS from a liquid is disclosed. The product may comprise attapulgite that has been surface functionalized with (a) a quaternary amine surface coating solution that comprises a mono-quaternary amine compound or a di-quaternary amine compound and (b) a mercapto surface coating solution that comprises a surface coating agent that includes one or more mercapto groups that chemically bond to the attapulgite surface. When the quaternary amine surface coating solution includes the mono-quaternary amine compound, the product is free of di-quaternary amines. When the quaternary amine surface coating solution includes the di-quaternary amine compound, the product is free of mono-quaternary amines. Also disclosed is a method of producing the product and a method of adsorbing a PFAS in a liquid using the product.

The present invention relates to a method of capturing carbon dioxide comprising: a) providing a particulate material, wherein the particulate material comprises calcium carbonate and/or titanium dioxide, b) providing a silane, c) providing a surface activator, d) mixing the particulate material and the surface activator to form a surface activated particulate material, e) mixing the silane and the surface activated particulate material to form a mixture, f) mixing water and the mixture to form a composition, g) drying the composition to produce a carrier, and h) treating the carrier with carbon dioxide.

Described herein are solid sorbents including amines that are covalently bonded to a porous support. The solid sorbents exhibit high adsorption capacities for carbon dioxide. The solid sorbents exhibit desirable hydrothermal and cycling stability.