A SO.sub.2 adsorption material, a preparation method therefor and an application thereof, and a method for removing SO.sub.2 from flue gas containing SO.sub.2 are provided. The SO.sub.2 adsorption material contains a carbonized metal organic framework material and a sulfite loaded on the carbonized metal organic framework material, and the carbonized metal organic framework material is a carbonized material obtained by carbonizing a metal organic framework material. On the basis of the total weight of the SO.sub.2 adsorption material, the loading amount of sulfite is not higher than 10 wt %. The SO.sub.2 adsorption material has a relatively high SO.sub.2 adsorption capacity, and may be desorbed and regenerated by heating, and the adsorption capacity still remains at a relatively high level after multiple cycles of adsorption-desorption.

A novel adsorbent and contactor material based on polymer functionalized with amidoxime and alkylamines moieties. Methods of making the material are also described. The material can be easily processed into any desired sorbent geometry such as solid fibers, electrospun fibers, hollow fibers, monoliths, etc. The adsorbent exhibits a very high affinity toward acidic gases such CO.sub.2 and can be used in direct air capture, power plant-based CO.sub.2 capture, and industrial CO.sub.2 capture applications. The material can also serve as a contactor that accommodates other adsorbents within its structure.

A blood treatment material adsorbs and removes blood components such as activated leukocytes and inflammatory cytokines with a high efficiency. The blood treatment material includes a water-insoluble material in the form of fibers or particles, wherein the difference between the maximum value (RaA) and the minimum value (RaB) of the arithmetic average roughness (Ra) of the surface of the water-insoluble material, as calculated using a laser microscope, is from 0.30 to 1.50 μm.

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.

An object of the present invention is to provide a ligand-immobilized sea-island composite fiber in which generation of fine particles due to peeling of a sea component from an island component and generation of fine particles due to destruction of a fragile sea component are both suppressed. The present invention provides a sea-island composite fiber comprising a sea component and island components, in which a value (L/S) obtained by dividing the average total length (L) of the perimeter of all island components in a cross section perpendicular to the fiber axis by the average cross-sectional area (S) of the cross section is from 1.0 to 50.0 μm.sup.−1, a distance from the surface to the outermost island component is 1.9 μm or less, and an amino group-containing compound is covalently bonded to a polymer constituting the sea component at a charge density of 0.1 μmol or more and less than 500 μmol per 1 gram dry weight.

An objective of the present disclosure is to provide an adsorption material that has a carrier material with retained physical strength, and efficiently adsorbs an immunosuppressive protein. The present disclosure provides an adsorption material for immunosuppressive protein. The adsorption material includes a water-insoluble carrier to which at least one nitrogen-containing compound selected from a polyamine represented by a predetermined formula and aliphatic amines represented by predetermined formulae is bound. A total content of amino groups on the water-insoluble carrier is more than 0 μmol and 2500 μmol or less per 1 g, and a content of primary amino groups on the water-insoluble carrier is 450 μmol or less per 1 g.

A method for producing modified sawdust sorbent that includes sulfonating sawdust with sulfuric acid and oxidizing the sulfonated sawdust with hydrogen peroxide. The method yields 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. A method of using the modified sawdust sorbent for organic dye removal from water includes contacting dye contaminated water with the modified sawdust sorbent and forming a dye-impregnated sorbent and decontaminated water.

A preparation method of charcoal-based fertilizer is provided. Particularly, a special pig manure charcoal modified by amino grafting, a preparation method thereof, and its application in the reuse of nitrogen from farmland drainage are provided. The preparation method includes the following steps: 1) drying raw pig manure to a moisture content of 80%-85% and carrying out pickling, drying, and crushing successively to obtain a dried pig manure powder; 2) conducting liquid nitrogen pretreatment and high-temperature charcoalization to obtain an expanded pig manure charcoal; 3) performing carboxylation treatment to obtain a carboxylated pig manure charcoal; 4) amino grafting: adding an ammonia liquor to the carboxylated pig manure charcoal obtained in step 3), stirring for 20-24 h in an oil bath at 200-240° C.; washing and filtering; and drying and grinding to obtain the special pig manure charcoal modified by amino grafting.

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. A method of using the modified sawdust sorbent for organic dye removal from water is included.

The present invention relates to a method for manufacturing a carbon dioxide absorbent and to the absorbent manufactured by the method. The method comprises: (A) a step of preparing a slurry composition including a carrier composition containing a support, an inorganic binder, and a solvent; (B) a step of preparing solid particles by spray drying the thus-prepared slurry composition; (C) a step of manufacturing a carrier by dry calcining the thus-prepared solid particles; and (D) a step of receiving an amine compound into the pores of the thus-manufactured carrier. According to the absorbent of the present invention, an absorbing reaction and a regenerating reaction at a low temperature range (less than or equal to 100° C. may be conducted, and therefore, the cost for capturing CO.sub.2 in a dry capturing process may be expected to decrease.