A filter media composition includes a ferrihydrite material having an average pore size (BJH) in a range from 1 to 3 nm and a surface area (BET) of at least 200 m.sup.2/g or at least 250 m.sup.2/g or at least 300 m.sup.2/g.

The present application relates to activated carbon compositions for removing viral, bacterial, or other infectious particles from air. The activated carbon was found to be effective at filtering aerosolized bacteriophage particulates and could be applied to barrier materials which prevents viral particulates from passing through, for example in home filters or masks or other coverings to prevent the spread of infectious diseases.

An adsorbent consisting of iron oxyhydroxide, having a high adsorption rate and high adsorption efficiency compared with conventional products. The adsorbent particle is an adsorbent particle having a crystal structure of β-iron oxyhydroxide, having an average crystallite diameter of 10 nm or less as measured by X-ray diffraction, wherein 90% or more of volume of adsorbent particle is constituted of granular crystals having crystal particle diameter of 20 nm or less, or columnar crystals having width of 10 nm or less and length of 30 nm or less. The adsorbent particle have at least either of the following characteristics: (A) the adsorbent particle contains metal element other than iron in amount of 0.1 to 20% by mass with respect to iron element, or (B) the adsorbent particle contains sulfur oxoacid ions in an amount of 0.01 to 20% by mass in terms of sulfur element with respect to iron element.

A composite material, wherein the composite material contains aluminum alloys with at least one of alkaline-earth metals and transition metals, and are used for removing pollutants by dissolving to release divalent metal ions, trivalent aluminum ions and hydroxide ions, which contact with other divalent and trivalent metal cations and anions in the contaminated water, to perform an in situ self-assemble of two-dimensional Layered Double Hydroxides (LDH) precipitates; consists of 18-70 weight% of aluminum metal, 30-80% weight of a second type of metal, and 0-2 weight% of an auxiliary agent; has a particle size of 0.01-3 mm; and preferably forms a micro-nano Alloy@LDH composite material with a core-shell structure by pretreating with dilute HCl. The present invention is used for soil remediation or sewage purification, and is suitable for chemical removal and degradation of complex contaminants from an acidic to alkaline environment.

Providing a surface molecularly imprinted magnetic nanomaterial of salvianolic acid A, a preparation method therefor and use thereof. The nanomaterial is obtained by using ferroferric oxide nanoparticles as a core, salvianolic acid A as a template molecule, 4-acryloyloxy phenylboronic acid, vinyl imidazole and methacryloylpropyl trimethyl ammonium chloride as copolymerization functional monomers, bismethylene acrylamide as a cross-linking agent, and azoamidine initiator V50 as an initiator, synthesizing surface imprinted magnetic material containing template molecules by surface polymerization, and finally eluting the template molecule with 0.1 M HCl. It is a spherical particle with a core-shell structure of about 250 nm, with positive charge on the surface and strong hydrophilicity, which can be recycled. Moreover, this magnetic material is easy to be separated by a magnet. The surface molecularly imprinted magnetic nanomaterial prepared by the present application can be used for rapid, large-capacity and high-selectivity separation and enrichment of salvianolic acid A.

A synergistic composition can be used to treat water containing nitrogen compounds and phosphorus compounds. The synergistic composition includes iron filings, clay particles, aluminum particles, and sand particles. The iron filings, clay particles, and aluminum particles act synergistically to remove nitrogen compounds and phosphorus compounds from water. Specifically, the clay particles attract the nitrogen compounds and the phosphorus compounds to be absorbed onto a surface of the iron filings and the clay particles. The aluminum particles react with the nitrogen compounds via an oxidation reaction to form ammonia compounds, and react with the phosphorus compounds to produce aluminum phosphate. As such, the synergistic relationship between the iron filings, clay particles, and aluminum particles remove nitrogen and phosphorus compounds from water and recover the compounds in usable forms, namely, ammonia and aluminum phosphate.

A metal adsorbent-carrying carbon material includes: a carbon material; and a metal adsorbent that is supported on the carbon material.

Described herein is a soil remediation material capable of absorbing and removing chromium from soil and being recycled so as to enable efficient remediation, repeated recycle, and reduction in remediation cost.

The invention is directed to a nanostructured composite material comprising a mixture of at least one metal particle such as iron and a carbon material from biomass such as D-glucose, D-glucosamine hydrochloride or α-cyclodextrin. The invention is also directed to a composition comprising the composite material comprising the composite material and an inorganic salt, and a method for synthesizing the composite material comprising immersing the carbon material into a solution of metal ions, drying the impregnated carbon particle and subjecting the impregnated carbon particle to a carbothermal reduction process. The nanostructured composite material is useful as an oxygen scavenging layer in a multi-layer film which comprises the oxygen scavenging layer and an oxygen barrier layer that retards the permeation of oxygen from an external environment.

Provided herein are rapid and reversible methods to non-specifically immobilize peptides and proteins irrespective of their sequence, as well as small molecules, on a solid support to allow for manipulations of and reactions with these molecules in a manner that does not require purification between steps, which increases sample yield and reduces the quantity of starting material required.