The present invention provide novel immunofiber compositions for protein or peptide purification and simple and cost-efficient methods and systems using these compositions. In some embodiments, the immunofibers comprise a customized Z-33 peptide derived from Staphylococcus aureus Protein A which is used to construct immuno-amphiphile molecules that assemble into immunofibers in aqueous solution with bioactive epitopes on the surface and have peptide or protein binding ability.

The present application is directed to processes for removing carbon dioxide (CO.sub.2) from low CO.sub.2 concentration gaseous streams. The process comprises contacting the gaseous stream with a hydrogel for absorbing at least some CO.sub.2 from the gaseous stream. The hydrogel comprises a cross-linked hydrophilic polymer comprising a hydrophilic polymer cross-linked with a cross-linking agent. Processes for preparing the hydrogel, types of hydrogels, using the hydrogel to remove CO.sub.2 from gaseous streams, and regenerating the hydrogel to recover absorbed CO.sub.2 from the hydrogel are also disclosed.

A method for producing a nanocomposite sorbent comprising carbon nanotube-grafted acrylic acid/acrylamide copolymer which involves copolymerization of acrylic acid and acrylamide in the presence of an aqueous dispersion of carbon nanotubes. The method yields a nanocomposite sorbent material having a reversible adsorption capacity phenol of 5 to 2500 μg of phenol per mg of nanocomposite sorbent. Also disclosed is a method for removing organic pollutants from water using the nanocomposite sorbent.

A sorbent pellet comprising a sorbent material. The sorbent pellet is suitable for use in a sorbent rotor device, for example to capture water or water vapour from a gaseous or liquid composition comprising water or water vapour. The sorbent material has a unit cell density of at least 0.8 g/cm3 and may therefore be considered to be a high density sorbent material. A plurality of sorbent pellets may provide a high capacity media for a sorbent rotor device, which may be particularly effective in dehumidification, desalination or water purification processes. Also disclosed are a cartridge for a sorbent rotor device, a sorbent rotor device for capturing water from a liquid or gaseous composition comprising water, a method of capturing water from a composition comprising water and/or water vapour, and a use of a sorbent material having a density of at least 0.8 g/cm3 in pellet form to capture water from air.

The invention relates to strong hydrogen-bond acidic sorbents. The sorbents may be provided in a form that limits or eliminates intramolecular bonding of the hydrogen-bond acidic site between neighboring sorbent molecules, for example, by providing steric groups adjacent to the hydrogen-bond acidic site. The hydrogen bond site may be a phenolic structure based on a bisphenol architecture. The sorbents of the invention may be used in methods for trapping or detecting hazardous chemicals or explosives.

Provided is a composition for removal of a target substance from a fluid stream, the composition comprising a support material comprising cellulose; and a sorbent molecule that comprises a linear or branched polyamine having a molecular weight of less than 500. The polyamine is covalently linked to the support material, and the sorbent molecule further comprises a covalently linked hydrophobic group. Also provided are processes for removal of a target substance from a fluid stream comprising contacting the fluid stream with such composition, and methods of making such compositions.

Novel radioactive iodide molecular traps, in which one or more metal atoms are functionalized by coordinating to an amine containing two or more nitrogens, and methods of using the molecular traps to capture radioactive iodide.

A carbon dioxide adsorbent including silica gel and an amine compound carried by the silica gel. The silica gel has a spherical shape, a particle size ranging from 1 mm to 5 mm inclusive, an average pore diameter ranging from 10 nm to 100 nm inclusive, a pore volume ranging from 0.1 cm.sup.3/g to 1.3 cm.sup.3/g inclusive, and a waterproof property N that is defined by an expression (1) and that is not lower than 45%,
N=(W/W.sub.0)×100  (1) where N is the waterproof property in percentage (%) of the silica gel, W.sub.0 is a total number of particles of the silica gel immersed in water, W is a number of particles of the silica gel not subjected to breakage out of W.sub.0.

An apparatus for capturing a water content from a water containing gas, the apparatus comprising: a housing having an inlet into which the water containing gas can flow; a water adsorbent located in the housing, the water adsorbent comprising at least one water adsorbent metal organic framework composite capable of adsorbing a water content from the water containing gas; and a water desorption arrangement in contact with and/or surrounding the water adsorbent, the water desorption arrangement being selectively operable between (i) a deactivated state, and (ii) an activated state in which the arrangement is configured to apply heat, a reduced pressure or a combination thereof to the water adsorbent to desorb a water content from the water adsorbent.

A process for separating one or more one-ring cycloparaffins and one or more multi-ring cycloparaffins from a hydrocarbon mixture is disclosed. The process comprises the steps of providing the hydrocarbon mixture; and contacting the hydrocarbon mixture with an adsorbent material comprising a metal organic framework to separate the one or more one-ring cycloparaffins and the one or more multi-ring cycloparaffins from the hydrocarbon mixture. The process is conducted in a liquid phase.