A porous porphyrin polymer and a method of recovering precious metal elements using the same are described. A porous porphyrin polymer represented by Formula 1 has high selectivity for precious metal elements and a high ability to adsorb precious metal elements, and can be applied to the recovery of precious metal elements either from metal leachates of waste electronic products or from river water or seawater.

A method for producing a modified sawdust sorbent. The method involves sulfonating sawdust with sulfuric acid and oxidizing the sulfonated sawdust with hydrogen peroxide. The method yields a modified sawdust sorbent containing sulfonated and oxidized cellulose. The modified sawdust sorbent has a higher surface area, higher organic dye adsorption capacity, and more rapid organic dye adsorption rate than unmodified sawdust. Also disclosed is a method of using the modified sawdust sorbent for organic dye removal from water.

Provided is a method for producing cellulose particles or cellulose acetate particles. By a production method including: (a) dissolving cellulose acetate in an organic solvent and preparing a cellulose acetate solution; (b) obtaining an emulsion of the cellulose acetate solution and an aqueous medium using a porous membrane; and (c) precipitating cellulose acetate particles from the emulsion, cellulose acetate particles are produced. By further saponifying the cellulose acetate obtained by the production method, cellulose particles are produced.

A method for producing a modified sawdust sorbent. The method involves sulfonating sawdust with sulfuric acid and oxidizing the sulfonated sawdust with hydrogen peroxide. The method yields a modified sawdust sorbent containing sulfonated and oxidized cellulose. The modified sawdust sorbent has a higher surface area, higher organic dye adsorption capacity, and more rapid organic dye adsorption rate than unmodified sawdust. Also disclosed is a method of using the modified sawdust sorbent for organic dye removal from water.

A method of separating a metal organic framework (MOF) from a solution and associated apparatus. The method comprises: providing a MOF containing solution; contacting the MOF containing solution with an acoustic reflector surface such that, any high frequency ultrasound applied within the MOF containing solution reflects off the acoustic reflector surface; and applying a high frequency ultrasound of at least 20 kHz to the MOF containing solution. The MOF material is substantially separated from solution as aggregated sediment that settles out of solution.

The present invention provides composite material having a porous graphene-based foam matrix and comprising porous inorganic micro-particles and metal oxide nano-particles distributed throughout the foam matrix.

Described herein is a process for producing a zeolitic material having an MWW framework structure containing YO.sub.2 and B.sub.2O.sub.3, in which Y stands for a tetravalent element. The process includes the steps of (i) preparing a mixture containing one or more sources for YO.sub.2, one or more sources for B.sub.2O.sub.3, one or more organotemplates, and seed crystals, (ii) crystallizing the mixture obtained in (i) for obtaining a layered precursor of the MWW framework structure, and (iii) calcining the layered precursor obtained in (ii) for obtaining the zeolitic material having an MWW framework structure. Also disclosed herein are synthetic boron-containing zeolites obtain by the process and uses thereof.

A polymer matrix composite comprising a porous polymeric network; and a plurality of functional particles distributed within the polymeric network structure, and wherein the polymer matrix composite has an air flow resistance at 25 C., as measured by the Air Flow Resistance Test, of less than 300 seconds/50 cm.sup.3/500 micrometers; and wherein the polymer matrix composite has a density of at least 0.3 g/cm.sup.3; and methods for making the same. The polymer matrix composites are useful, for example, as filters.

A sorbent useful for CO.sub.2 capture is described, including a solid support with CO.sub.2-sorbing amine and ionic liquid thereon. The ionic liquid is catalytically effective to enhance sorbent characteristics such as (i) CO.sub.2 sorption capacity, (ii) CO.sub.2 sorption rate, (iii) CO.sub.2 desorption capacity, (iv) CO.sub.2 desorption rate, and (v) regeneration temperature, in relation to a corresponding sorbent lacking the ionic liquid. In specific implementations, the sorbent is regenerable at temperatures significantly below 100 C., thereby avoiding the need for steam heat desorption and enabling utilization of waste heat or other low energy thermal regeneration sources.

A preparation method for a combined modified straw active particulate carbon adsorption material and use of same. The preparation method for the combined modified straw active particulate carbon adsorption material comprises the following steps: 1) mixing straw powders, distilled water, a binder and a composite mineral, then pelletizing same, and then placing same in a tube furnace for pyrolysis to prepare straw particulate carbon; 2) introducing an inert gas into a modification reagent, adjusting the pH value combined and 3) soaking the straw particulate carbon into the combined modification solution for 30 min, and performing cleaning and drying, so as to obtain a combined modified straw active particulate carbon adsorption material. The combined modified straw active particulate carbon has a good adsorption effect on phosphate group in low-pollution water.