30results about How to "Increase active sites" patented technology

The invention provides a preparation method of a heavy metal ion remover. Discarded hardened cement concrete is used as a raw material. The preparation method comprises the steps: primary crushing andpresintering; smashing and separation; ball milling and activation; and powder separation. Heavy metal ions in wastewater containing copper, zinc, chromium, nickel and the like can be effectively removed, and an implementation process of a technical method has the advantages that the speed for removing the heavy metal ions is high, the reaction time is short, the removal effect is stable, and themethod can be operated at room temperature. The technical application of a building waste, namely hardened cement stone in discarded concrete, is widened to the field of heavy metal sewage treatment,no problem of limit mixing amount exists, the recycling efficiency of the discarded cement stone is increased, and the economic additional value of the discarded cement stone is increased.

The invention provides a method for preparing a composite material of activated carbon loaded with nanometer zero-valent iron, comprising the following steps: Step 1: adding microcrystalline cellulose solution and citric acid to the activated carbon, and hydrothermally reacting to prepare modified activated carbon; Step 2 : Polyethylene glycol is dissolved in ultrapure water to prepare a dispersant solution; Step 3: FeSO4·7H2O is dissolved in the dispersant solution, stirred magnetically under nitrogen protection, and slowly dripped into NaBH4 solution to obtain Activated carbon multi-site loaded nano zero-valent iron composite material. The invention prepares multi-point activated carbon, increases the active sites of activated carbon to a large extent, and effectively improves the loading capacity of nano-zero-valent iron; uses polyethylene glycol solution as a dispersant, so that nano-zero-valent iron particles are evenly loaded on the activated carbon , good dispersion, and improve the catalytic degradation ability of the composite material to pollutants; polyethylene glycol is non-toxic and has good stability, and the residual components will not cause secondary pollution during the repair process.

The invention discloses application of waste concrete to fluorine removal in water. During application, the method comprises the following steps: (1) primarily crushing and calcining the waste concrete serving as a raw material, screening out cement stone, ball-milling the cement stone, performing powder selecting separation and collecting particles with the particle size being below 80 [mu]m to obtain a water fluorine removing agent; and (2) throwing the water fluorine removing agent obtained in the step (1) into fluorine-containing wastewater to remove the fluorine from the wastewater. Application of the building waste, namely waste concrete, is enlarged to the field of treatment of the fluorine-containing wastewater, the water fluorine-removing material is prepared, the reaction speed is high in the water fluorine removing process, limit doped amount does not exist, the utilization efficiency is high, the fluorine-removing effect is stable, operation can be conducted at room temperature, the resource utilization efficiency of the waste cement stone is improved, and a technological route is provided for high-additional-value utilization of hardened cement stone in the waste concrete.

The invention discloses a high-dispersion heavy-hydrocarbon Fischer-Tropsch synthetic catalyst based on a carbonization processing method and a preparation method thereof. The preparation method of the high-dispersion heavy-hydrocarbon Fischer-Tropsch synthetic catalyst comprises the following steps: loading a soluble salt of a metal additive on a formed carrier by using an impregnation method, drying and roasting to obtain a pre-processed carrier; loading a soluble cobalt salt and an organic matter on the pre-processed carrier by using the impregnation method, and drying to obtain the catalyst. According to the preparation method, a process of carbonization processing is introduced into a conventional evaluation step of reduction-Fischer-Tropsch synthesis of the catalyst, and the evaluation step is optimized as a step of reduction - synthesis gas processing - carbonization - H2 reprocessing, so the Co average grain size of the catalyst through the above actions is reduced. The secondary reduction is performed on the carbonized catalyst, the excess carbon deposition is eliminated, and thereby the Fischer-Tropsch reactivity of the catalyst is improved. Through the secondary reduction, the grain size is reduced, the activity point location is increased, and the reduction degree of the catalyst is further improved, so the performance of the catalyst is improved.

The invention disclose a preparation method of a fluorine removal agent for water. The method includes: waste concrete is used as the raw material and subjected to primary crushing and calcining to screen out set cement, and the set cement is subjected to ball milling and powder selection and separation to collect particles with the particle size being below 80 micrometers so as to obtain the fluorine removal agent for water. The preparation method has the advantages that the waste concrete is used to prepare the fluorine removal agent, and the method is wide in raw material source and low in cost and provides a new approach for the recycling of the waste concrete; the method which is simple to operate, widely applicable, low in cost, environmentally friendly and capable of using waste materials to treat pollution is provided for the treatment of fluorine-containing wastewater of rivers and lakes of China, industrial and domestic fluorine-containing wastewater of China, and the like; the recycling efficiency of waste set cement is increased, and a technical path is provided for the high-additional-value utilization of the hardened cement paste in the waste concrete.

The invention relates to a method for preparing a circulating fluidized bed boiler ash based flue gas mercury removal adsorbent for a coal-fired power plant. The method is used for solving the problem that energy-saving, environment-friendly and simply-operated methods for preparing the circulating fluidized bed boiler ash based flue gas mercury removal adsorbent for the coal-fired power plant do not exist currently. The method is characterized by comprising the following steps: (1) weighing the raw materials in parts by weight: 60-80 parts of circulating fluidized bed boiler ash, 10-15 parts of clay, 5-10 parts of activated carbon and 5-15 parts of bromide, adding water to mix uniformly, dipping for 4-8 hours, and stirring at a constant speed by using a stirrer during dipping modification; (2) preparing spherical granules from a dipping-modified adsorbent by a granulator by adopting a cold-curing forming process, and naturally drying for 10-14 hours; (3) drying naturally-dried spherical adsorbent granules in a vacuum drying oven for 12-24 hours, then, taking out, putting into a drier and cooling to room temperature, thereby obtaining the circulating fluidized bed boiler ash based flue gas mercury removal adsorbent. The method has the advantages that the cost can be reduced effectively, and the operation is simple.

The invention discloses a modified-rice-straw soil modifier for desertificated soil. The soil modifier is made from the following raw materials, by weight part, 24-25 of konjac flour, 5-7 of guar gum powder, 28-30 of diatomite, 3-4 of carboxymethyl cellulose, 2-3 of ferric citrate, 2.0-2.4 of silicon sulfate, 6-7 of potassium dihydrogen phosphate, 45-47 of rice straw, 1.6-1.8 of monochloro acetic acid, 15-16 of kaolin, 6-7 of calcium-based bentonite and a proper amount of water. The soil modifier aims at a desertificated soil structure. Through addition of guar gum powder and cured diatomite, adhesion power among desertificated soil particles is improved, and through the addition of water-retention materials, the water retention ability of desertificated soil is improved, thereby improving and solidifying the quality and structure of desertificated soil. The soil modifier is simple to apply and is suitable for large-scale popularization for improvement of desertificated soil.

The invention relates to the field of environmental restoration, and in particular, relates to a preparation method for a composite zero-valent iron dechlorination agent from flos sophorae and an application of the composite zero-valent iron dechlorination agent, wherein the composite zero-valent iron dechlorination agent can degrade chlorine-containing organic matters. The preparation method comprises the steps of pretreatment of biochar, preparation of a flos sophorae dissolution liquid, preparation and loading of zero-valent iron and the like. The composite zero-valent iron dechlorination agent has the advantages of large loading capacity, good dispersity, uniform loading, large specific surface area and the like, has excellent reaction activity in reduction and dechlorination of chlorine-containing organic pollutants, has good degradation effect, and cannot cause secondary pollution to the environment in the repair process.

The invention discloses a preparation method of multi-edge graphene and an aluminum ion battery prepared by the method. The preparation method comprises the following steps of removing an oxide layeron surfaces of the nickel particles and connecting the nickel particles with each other; then growing graphene on the surfaces of the flaky nickel particles to form a nickel net structure covered withthe graphene; covering a layer of PMMA (polymethyl methacrylate) on the surface of the nickel net structure covered with the graphene to obtain a PMMA/graphene/nickel net structure; removing the metal nickel by using acid to obtain a PMMA/graphene structure sample; and finally, removing PMMA to obtain the multi-edge graphene. According to the preparation method disclosed by the invention, the nickel particles are used as the template and the catalyst to prepare the independent multi-edge graphene with improved energy density, excellent mechanical strength and excellent conductivity at low temperature through a chemical vapor deposition process, the multi-edge graphene is an excellent positive electrode material of the rechargeable aluminum ion battery; and the method realizes low energy consumption and low cost, large-scale mass production is facilitated, and the aluminum ion battery based on the multi-edge graphene has a wide working temperature range and high coulombic efficiency.

The invention discloses a modified-rice-straw soil modifier for red soil. The soil modifier is made from the following raw materials, by weight part, 23-25 of cassava residue, 27-28 of bird droppings, 4-5 of quick lime, 3-4 of chitosan oligosaccharide, 2.8-3.2 of sodium ferric ethylene diamine tetraacetic acid, 2-3 of sodium pyrophosphate, 7-8 of calcium ammonium nitrate, 52-55 rice straw, 2.2-2.4 of monochloro acetic acid, 13-14 of kaolin, 5-6 of calcium-based bentonite and a proper amount of water. The soil modifier aims to solve problems of hardening and acidification of red soil. Through addition of alkaline raw materials and organic raw materials, the unit weight of the red soil is effective reduced, the content of water stable aggregate and organic matters in the red soil are added, and the red soil is loosened. The physical biological indices of the red soil are overall improved, thereby achieving the purpose of high yield of plant growing in the red soil.

The invention belongs to the technical field of agriculture and forestry waste biomass energy, and particularly relates to a treatment and application method of nut waste. According to the invention, a biochar catalyst is prepared by collecting biochar which is one of the products obtained by pyrolysis of nut waste, and then a modified biochar catalyst is prepared by loading cheap transition metal onto the biochar by utilizing a precipitation method. Then the modified biochar catalyst is returned to be applied to the catalytic pyrolysis reaction of the nut waste, high-quality bio-oil and charcoal are generated through the reaction, and the charcoal is modified to serve as a catalyst for the catalytic pyrolysis reaction of the nut waste, so that a circulating closed loop is formed. The mode of recycling the catalyst preparation material and the conversion product reflects the high-value full-quality utilization of the nut waste.