The invention relates to an Mg/Al hydrotalcite modified charcoal composite material and a preparation method and application thereof. According to the composite material, charcoal is used as a substrate, and roasted Mg/Al hydrotalcite is loaded on the surface of the substrate. The preparation method comprises the specific steps that biomass powder is soaked with an Mg/Al water solution at first, then, a composite of Mg/Al hydrotalcite and biomass is prepared, and finally the composite of Mg/Al hydrotalcite and biomass is pyrolyzed through a tubular atmosphere furnace in N2 atmosphere to obtain the product. In the preparation process of the Mg/Al hydrotalcite modified charcoal composite material, biomass pyrolysis and hydrotalcite roasting are carried out in one heat treatment process, the preparation cost is reduced, and the preparation time is shortened. The structure of the roasted Mg/Al hydrotalcite can be partially recovered to be hydrotalcite of an orderly stratified structure after the roasted Mg/Al hydrotalcite makes contact with the water. The Mg/Al hydrotalcite modified charcoal composite material has the good adsorption effect on dye in waste water.

Mg/Al hydrotalcite modified charcoal composite material and preparation method and application thereof

The invention discloses a porous carbon adsorbent as well as a preparation method and an application thereof The active ingredients of the adsorbent refer to amorphous carbon and metallic oxides, wherein the mass ratio of the amorphous carbon to metallic oxides is (1-10):1 The preparation method comprises the following steps: dipping a natural high polymer material in a nitrate aqueous solution, drying, and carbonizing, thereby obtaining the porous carbon adsorbent The porous carbon adsorbent disclosed by the invention has an excellent adsorption effect and has an effect of enhancing the adsorption effect on anionic inorganic pollutants A natural and cheap high polymer material serves as a carbon source, can be conveniently processed into various shapes and is convenient to use; and in the test of low-concentration contaminated water samples, the adsorption effect of the porous carbon adsorbent is obviously superior to that of a commercial activated carbon adsorbent, straws, rice husk, coconut shells and other agricultural wastes can be utilized, the cost is low, and waste materials are changed into valuable things

Porous carbon adsorbent as well as preparation method and application thereof

The invention discloses a method for dephosphorizing phosphorus wastewater and producing a slow-release carbon-based phosphate fertilizer and the slow-release carbon-based phosphate fertilizer prepared thereby. The method comprises the following steps: (1) washing and crushing forest wastes, drying the forest wastes, and sieving the crushed forest wastes until the particle size is 0.5-4mm; (2) uniformly mixing the dried forest wastes and magnesium salt powder, and pyrolyzing the mixture in an oxygen-isolated environmental condition, thereby obtaining magnesium-modified biological carbon; (3) adding the magnesium-modified biological carbon into the phosphorus wastewater, performing oscillation or stirring, then removing a supernatant, collecting a precipitate, and airing or drying the precipitate, thereby obtaining the slow-release carbon-based phosphate fertilizer. The method not only is capable of obviously improving the adsorption capability of the biological carbon to phosphate radicals and ammonium ions, and effectively recycling phosphorus and nitrogen elements in the phosphorus wastewater, but also is extensive in magnesium salt sources, low in cost and free from environmental pollution. The slow-release carbon-based phosphate fertilizer prepared by the method is rich in organic carbon and the nitrogen and phosphorus elements, slow in fertilizer efficiency release and capable of obviously improving low-nutrient soil.

Method for dephosphorizing phosphorus wastewater and producing slow-release carbon-based phosphate fertilizer

The invention discloses a preparing method of modified reed biomass charcoal. The preparing method comprises the specific steps that reed straw is naturally air dried, ground and screened, and reed powder is obtained; a MgCl2 solution and the reed powder are mixed, the mixture is dried and then subjected to pyrolysis carbonization, aftertreatment is carried out, and then the modified reed biomass charcoal is obtained, wherein the concentration of the MgCl2 solution ranges from 0.5 mol/L to 0.75 mol/L, and the mass volume ratio of the reed powder to the MgCl2 solution is 0.1 g/mL. According to the preparing method, adopted raw materials are wide in source, the technology is simple, and the obtained modified reed biomass charcoal is large in specific surface area and capable of simultaneously and efficiently removing nitrogen and phosphor in water, and has the advantages of being environmentally friendly, high in treatment efficiency, economical, practical and the like.

Modified reed biomass charcoal and preparing method and application thereof

The invention provides a water treatment agent for treating eutrophic water. The water treatment agent is obtained through the following steps: 1, impregnating a biomass raw material in a metal salt solution to obtain a processed biomass raw material; and 2, carrying out heating pyrolysis on the processed biomass raw material under an anoxic or anoxic condition to obtain the water treatment agent, wherein the biomass raw material is one or more of crop straws, wood and nutshells. The water treatment agent can effectively remove various eutrophic ions in the eutrophic water, can improve the removal effect on single nitrogen-enriched or phosphorus-enriched nutritional elements, and also has the advantages of simplicity in preparation, and facilitation of large-scale production application.

Water treatment agent for treating eutrophic water

The invention discloses a metal element improved biochar-based nitrate radical adsorbent and a preparation method thereof. Straws are used as raw materials, and metal ions are impregnated, pyrolyzed and washed under certain conditions, so a metal ion improved cbiochar is prepared. According to the metal element improved biochar-based nitrate radical adsorbent and the preparation method thereof disclosed by the invention, by using adsorption research on nitrate radical waste water and comparing the adsorption effect of the biochar before and after improvement, the improved biochar prepared by the preparation method disclosed by the invention has good adsorption effect for potassium nitrate, wherein Mg improved wheat straw biochar has optimal adsorption effect for nitrate nitrogen; compared with the unmodified biochar, the Mg improved biochar prepared under the optimizing conditions has the advantages that the adsorption performance is improved by 10 times, and the adsorption equilibrium can be realized in a shorter time. The modified biochar adsorbent is a green adsorbent with application potential and can be used for effectively removing the nitrate nitrogen in a water body; besides, the effects of fixing carbon, reducing discharge and relieving the non-point source pollution are achieved.

Metal element improved biochar-based nitrate radical adsorbent and preparation method thereof

The present invention discloses a preparation method and applications of a lanthanum-loaded biochar arsenic-removing adsorbent The preparation method mainly comprises: washing corn stalks, remove impurities, carrying out air-drying, crushing, screening, carrying out stirring mixing on the corn stalk powder and a lanthanum chloride solution under a certain condition, adjusting the pH value to the alkaline state, removing excess chlorine ions from the solution, and carrying out anoxybiotic calcination on the mixture for a certain time at a certain temperature so as to prepare the nanometer lanthanum oxide-loaded biochar material According to the present invention, the prepared lanthanum-loaded biochar can be used for treating pentavalent arsenic ions in wastewater, and has characteristics of simple preparation, low cost, high adsorption efficiency, good application prospect, and the like

Yang Linzhang

Papers

Metal element improved biochar-based nitrate radical adsorbent and preparation method thereof

Preparation method and applications of lanthanum-loaded biochar arsenic-removing adsorbent