The invention provides a biomass-based hyperbranched adsorption material with multi-adsorption sites to multiple heavy metal ions and a preparation method thereof. The biomass-based hyperbranched adsorption material with multi-adsorption sites to multiple heavy metal ions is prepared by one-step instant-crosslinking method using a biomass raw material as matrix and a hyperbranched polymer containing chelating atoms of N, O, and S as functional reagent, wherein the hyperbranched polymer has two or more different adsorption sites (containing elements such as N, S, O, etc.) to heavy metal ions.

The invention provides a biomass-based hyperbranched adsorption material with multi-adsorption sites to multiple heavy metal ions and a preparation method thereof. The biomass-based hyperbranched adsorption material with multi-adsorption sites to multiple heavy metal ions is prepared by one-step instant-crosslinking method using a biomass raw material as matrix and a hyperbranched polymer containing chelating atoms of N, O, and S as functional reagent, wherein the hyperbranched polymer has two or more different adsorption sites (containing elements such as N, S, O, etc.) to heavy metal ions.

A method for preparing a nano carbon dioxide agent and an application of the agent are disclosed. The method takes cationic surfactant modified bentonite as a carrier, and the CO.sub.2 nano agent prepared by loading cationic surfactant modified chitosan, graphene oxide and organic alkali modified hydrotalcite has the photocatalytic effect of nano materials, which can enhance photosynthesis, increase photosynthetic rate, inhibit light respiration at night, synthesize chlorophyll for crop growth, accumulate three essential elements of carbon, hydrogen and oxygen for crop growth, effectively absorb, synthesize and transform organic components such as nitrogen, phosphorus and potassium in soil, fully promote the gestation, growth and maturity of crops, and increases production and income. The CO.sub.2 capture agent of the disclosure can be used for both facility crops and field crops, and the CO2 capture agent under normal temperature and pressure has wide application.

A method for preparing a nano carbon dioxide agent and an application of the agent are disclosed. The method takes cationic surfactant modified bentonite as a carrier, and the CO.sub.2 nano agent prepared by loading cationic surfactant modified chitosan, graphene oxide and organic alkali modified hydrotalcite has the photocatalytic effect of nano materials, which can enhance photosynthesis, increase photosynthetic rate, inhibit light respiration at night, synthesize chlorophyll for crop growth, accumulate three essential elements of carbon, hydrogen and oxygen for crop growth, effectively absorb, synthesize and transform organic components such as nitrogen, phosphorus and potassium in soil, fully promote the gestation, growth and maturity of crops, and increases production and income. The CO.sub.2 capture agent of the disclosure can be used for both facility crops and field crops, and the CO2 capture agent under normal temperature and pressure has wide application.

Sorbent cartridges having a flow control insert to improve the functional capacity of a sorbent cartridge is provided. Flow control inserts can include a plurality of flow channels filled with sorbent material through which fluid to be regenerated can travel in the sorbent cartridge.

Sorbent cartridges having a flow control insert to improve the functional capacity of a sorbent cartridge is provided. Flow control inserts can include a plurality of flow channels filled with sorbent material through which fluid to be regenerated can travel in the sorbent cartridge.

The disclosure relates to modified wood pulp and methods using the same for removal for per- and polyfluoroalkyl substances (collectively “PFAS”) from contaminated water. Cationic-modified wood pulp can be used to adsorb anionic PFAS contaminants from water, and anionic-modified wood pulp can be used to adsorb cationic PFAS contaminants from water. The modified wood pulp has high adsorption efficiencies, rapid adsorption kinetics, and high adsorption efficiencies for a range of different PFAS contaminants.

The disclosure relates to modified wood pulp and methods using the same for removal for per- and polyfluoroalkyl substances (collectively “PFAS”) from contaminated water. Cationic-modified wood pulp can be used to adsorb anionic PFAS contaminants from water, and anionic-modified wood pulp can be used to adsorb cationic PFAS contaminants from water. The modified wood pulp has high adsorption efficiencies, rapid adsorption kinetics, and high adsorption efficiencies for a range of different PFAS contaminants.

Grafted, crosslinked cellulosic materials include cellulose fibers and polymer chains composed of at least one monoethylenically unsaturated acid group-containing monomer (such as acrylic acid) grafted thereto, in which one or more of said cellulose fibers and said polymer chains are crosslinked (such as by intra-fiber chain-to-chain crosslinks). Some of such materials are characterized by a wet bulk of about 10.0-17.0 cm3/g, an IPRP value of about 1000 to 7700 cm2/MPa.Math.sec, and/or a MAP value of about 7.0 to 38 cm H2O. Methods for producing such materials may include grafting polymer chains from a cellulosic substrate, followed by treating the grafted material with a crosslinking agent adapted to effect crosslinking of one or more of the cellulosic substrate or the polymer chains. Example crosslinking mechanisms include esterfication reactions, ionic reactions, and radical reactions, and example crosslinking agents include pentaerythritol, homopolymers of the graft species monomer, and hyperbranched polymers.

Grafted, crosslinked cellulosic materials include cellulose fibers and polymer chains composed of at least one monoethylenically unsaturated acid group-containing monomer (such as acrylic acid) grafted thereto, in which one or more of said cellulose fibers and said polymer chains are crosslinked (such as by intra-fiber chain-to-chain crosslinks). Some of such materials are characterized by a wet bulk of about 10.0-17.0 cm3/g, an IPRP value of about 1000 to 7700 cm2/MPa.Math.sec, and/or a MAP value of about 7.0 to 38 cm H2O. Methods for producing such materials may include grafting polymer chains from a cellulosic substrate, followed by treating the grafted material with a crosslinking agent adapted to effect crosslinking of one or more of the cellulosic substrate or the polymer chains. Example crosslinking mechanisms include esterfication reactions, ionic reactions, and radical reactions, and example crosslinking agents include pentaerythritol, homopolymers of the graft species monomer, and hyperbranched polymers.