43results about How to "High adsorption value" patented technology

The invention relates to a method which can adopt the zinc chloride chemical activation method to prepare tung nutshell into active carbon. The technical proposal is as follows: 1) zinc chloride and tung nut shell are added into distilled water, stirred and soaked at 80DEG C and moisture is evaporated. 2) The mixture is placed in a high temperature activation furnace and nitrogen is firstly pumped in; at the speed of 200-300mL/min and under the protection of nitrogen, the mixture is heated to 350-900DEG C for activating reaction which lasts for 30-300 min to prepare primary products. 3) The mixture is arranged in a microwave high temperature activation furnace and heated by microwave radiation under the protection of nitrogen, the microwave radiation lasts for 8-20 min, and carbonization and activation are finished at the same step to prepare the primary products of active carbon. 4) The products are immersed in hydrochloric acid, then soaked by hot distilled water for two times, dried at 105 DEG C for 12 hours and weighed for calculating the yield. The method can successfully transform tung nutshell into active carbon, the specific surface area and the pore volume of which can reach 1602m <2>/g and 1.115mL/g respectively; the maximum methylene blue adsorption value can reach 300mg/g, while copper ion adsorption rate can exceed 99%.

The invention provides a burn-free coal-ash-based geological polymer high performance adsorbing material preparation method which comprises the following steps: a, preprocessing a solid raw material; b, preparing a base material, wherein solid waste coal ash containing rich aluminosilicate is utilized as the solid raw material, an alkali activator is utilized as a liquid raw material, and the solid raw material and the liquid raw material are evenly mixed to react at a temperature of 20 to 100 DEG C to form a base; c, forming a base material, i.e., forming the evenly-mixed solid and liquid raw materials into a base sample through granulation molding or casting molding or extrusion molding; d, maintaining the base sample; e, washing and drying. The method can save energy, is simple in preparation technology, can reduce production cost, can be used to produce a high performance geological polymer adsorbing material in a large scale, and the waste coal ash of coal-fired power plants is utilized as a raw material to prepare the adsorbing material at a room temperature; thus, the problem of coal ash stack and waste and the environmental problems caused by the coal ash stack and waste are solved, and industrial organic waste gas and waste water containing phenol can be treated in a mode of using waste to treat waste.

The invention provides a cadmium-contaminated soil remediation agent, which consists of the following components by weight ratio: 30-50% of biomass charcoal, 10-20% of iron powder, 10-20% of plant ash, 10-20% of sodium sulfide, Zeolite 10‑20%; the above components fully exert synergistic effects, and through reduction, precipitation, adsorption, improvement, and adjustment of PH value, the effective cadmium in the soil is greatly reduced, and the prepared soil remediation agent can be used to repair cadmium-contaminated soil. With good effect, the restoration agent of the present invention has the advantages of simple preparation method, feasibility and good treatment effect.

The invention relates to a method of oxidation process on the surface of a carrier carbon, including the following steps that: powdered activated carbon is mixed with nitric acid solution with a concentration ranging from 2 to 12 percent by the weight ratio of 1:3 to 30 to make a powdered activated carbon suspension which is processed by ultrasonic radiation for 20-120min at the temperature between 30 DEG C and 60 DEG C, wherein, the ultrasonic energy is controlled between 1 and 10W/cm<2>. The suspension is filtered and the residue is cleaned by water until the pH value of the washing water ranges from 6.5 to 7. After drying, under the protection of nitrogen, the residue is processed at the high temperature between 800 DEG C and 1100 DEG C for 5 to 15min by microwave with the frequency of 2450 MHz and the power ranging from 200W to 850W. The method provided by the invention can remove most oxygen-functional groups on the surface of the activated carbon, improve the alkalinity and the specific surface area on the surface of the activated carbon and reduce the ash content of the activated carbon. Besides, the method provided by the invention has the advantages of short processing time, high processing efficiency, environmental protection and energy conservation.

The invention provides a soil remediation agent. The soil remediation agent is composed of, by weight, 10-25% of hydroxyl calcium phosphate, 30-45% of biomass charcoal, 10-15% of sodium sulfide, 10-15% of sodium bentonite and 10-15% of ammonium phosphate. The soil remediation agent is effective in remediation of soil contaminated by cadmium, lead, zinc, arsenic, copper and mercury.

The invention provides a heavy metal polluted soil remediation agent which is prepared from, by weight, 30-50% of biomass charcoal, 10-30% of alpha-cyclodextrins, 10-20% of zeolite, 5-10% of polyacrylamide, 5-10% of glucose and 5-10% of sodium sulphide. The preparation method comprises the steps that the biomass charcoal, the alpha-cyclodextrins, the zeolite, the polyacrylamide, the glucose and the sodium sulphide are evenly mixed according to the mass ratio, and therefore the soil remediation agent is prepared. The obtained soil remediation agent has the good effect on remedying cadmium, lead, zinc and copper composite polluted soil, and has the advantages that the method is simple and feasible, and the treatment effect is good.

The invention provides a preparation method of a fly ash-based zeolite molecular sieve for adsorbing VOCs. The preparation method specifically comprises the following steps: (1) reacting fly ash withhydrochloric acid at 100 DEG C, carrying out suction filtration, performing washing with water, and conducting drying to obtain pretreated fly ash; (2) reacting the pretreated fly ash with a sodium hydroxide solution for 30-60 minutes; (3) aging a reaction solid-liquid mixture for 4-8 hours, crystallizing the mixture at 110-130 DEG C for 3-10 hours, drying filter residues, and grinding the filterresidues to obtain a primary product; and (4) adding 15 mL-30 mL of a CTAB solution into every 1 g of the primary product, performing modifying for 20-40 minutes, and successively performing suction filtration, drying and grinding to obtain the CTAB-modified fly ash-based zeolite molecular sieve. The CTAB-modified fly ash-based zeolite molecular sieve is prepared from fly ash, preparation processis simple, production efficiency is high, fly ash solid waste can be digested, production cost and energy consumption can be reduced, and large-scale production is facilitated.

The invention relates to a method for preparing high-purity zinc oxide by using zinc-acetate-carrying waste activated carbon, belonging to the technical field of waste resource comprehensive recycling. The method comprises the following steps: by using zinc-acetate-carrying waste activated carbon as the raw material, carrying out microwave regeneration treatment, wherein the heating rate of the industrial microwave oven is controlled at 10-110 DEG C/minute, the microwave roasting temperature is 400-800 DEG C, and the holding time is 20-40 minutes; and after the regeneration treatment, naturally cooling at room temperature to generate a product of which the upper layer is zinc oxide and the lower layer is regenerated activated carbon, and finally, separating to obtain the zinc oxide and regenerated activated carbon. According to the method, the spent catalyst generated in the vinyl acetate production process is used as the raw material, and the microwave heating rate, roasting temperature and holding time are controlled in an air atmosphere to implement the regeneration of the zinc-acetate-carrying spent catalyst and the preparation of the high-purity zinc oxide, thereby providing a novel method for the reutilization of waste and preparation of high-purity zinc oxide, and further promoting the green development of activated carbon material and nonferrous metal zinc industries.

The invention discloses a regeneration method of low-carbon-loss activated carbon. Activated carbon is pretreated by iron or an iron compound as a catalyst at lower temperature, and the synergic actions of dilution and ultrasonic washing are performed; and thus, the regenerated activated carbon with high adsorptive value is obtained under the conditions of low energy consumption and mild conditions, and the carbon loss can be reduced to a large extent.

The invention discloses a method used for removing malachite green from waste water with sunflower seed shell biomass carbon adsorbent, and belongs to the technical field of waste water processing. The method comprises following steps: the sunflower seed shell biomass carbon adsorbent prepared via microwave heating, and sodium chloride are added into waste water containing 100 to 900mg/L malachite green and with a pH value of 2 to 8, adsorption is performed for 2 to 24 hours at a temperature of 20 to 60 DEG C, an obtained mixture is filtered for separation, and a filtrate is adjusted to be neutral, and then is discharged. The method used for removing malachite green from waste water is simple, cost is low, and no secondary pollution is caused.

The invention relates to the field of environmental protection, in particular to a method for regenerating activated carbon through steam. The method comprises the steps of carbon drying, thermal regeneration and regenerated carbon collection. According to the method for regenerating the activated carbon by steam, a plurality of methods are adopted to jointly inhibit chemical reaction between water vapor and a carbon material. By utilizing a balance principle, hydrogen and carbon monoxide are added into high-temperature medium water vapor, the reaction can be inhibited by increasing the concentration of a product, and the carbon loss is reduced; on the other hand, the silane-based sulfide inhibitor is added into the waste activated carbon, the oxidation-reduction reaction can be inhibitedat the same time, the reaction between the carbon material and water vapor is reduced through the combined action, the loss of the carbon material is reduced to the maximum extent, and the mechanicalstrength and the surface performance of the carbon material are guaranteed; according to the technical scheme, the method is low in cost and environmentally friendly, is purely green circular economyand can be applied to activated carbon reproduction on a large scale.

The invention relates to the field of coal-based oil preparation and coal-based activated carbon preparation, in particular to a process for preparing hot melt oil and mesoporous activated carbon simultaneously from low-rank coal and aims to provide the process for preparing the hot melt oil and the mesoporous activated carbon simultaneously from the low-rank coal. The process comprises steps as follows: S1, low-rank coal is crushed, dried and subjected to organic solvent supercritical hot melting, and a hot melt product and residual coal are obtained; S2, the obtained hot melt product and residual coal are filtered and separated; S3, the hot melt product is separated with a reduced pressure distillation method, and hot melt oil and an organic solvent are obtained; S4, activated carbon is prepared from the residual coal with a chemical activation method. The process is simple, raw materials are easy to obtain, the production cost is reduced, clean and high-added-value utilization of the coal is realized, the supercritical hot melting process of coal under the solvent action and the significance of loss of residual coal micromolecules for preparation of activated carbon with the activation method after supercritical hot melting is finished are introduced for the first time.