2250results about How to "Cause secondary pollution" patented technology

The invention relates to a high-strength hydrogel and a preparation method thereof. The preparation method comprises the steps of directly mixing a polymer, a monomer, an initiator, a cross-linking agent and water once, dissolving all the substances to form a homogeneous solution under a certain simulation condition, and then initiating and polymerizing by using heat or light to obtain the high-strength hydrogel, wherein the polymer is needed for preparation of the hydrogel and used for forming a first double network of a dual-network hydrogel; the monomer is used for polymerizing and forming a second double network of the dual-network hydrogel; the initiator is used for initiating the monomer to be polymerized; the cross-linking agent is used for performing cross-linking reaction in a monomer polymerizing process so as to form the second double network. According to the preparation method, a one-pot method is used for preparing the high-strength hydrogel, so that the method is simple and practicable; the prepared high-strength hydrogel has the characteristics of high strength and high toughness; a tensile strength of the gel is 0.6-1.2MPa, a tensile modulus is 100-200 KPa and a tensile strain reaches 1000-2680%; the prepared high-strength hydrogel can be widely applied to the fields of tissue repair, artificial organ, drug sustained release, sensors and the like.

The invention provides a method for preparing aluminum oxide and other products from aluminiferous materials such as bauxite, high iron bauxite, alunite, kaoline, alumina, fly ash, coal gangue, aluminum ash, nepheline, clay and the like. The method comprises the following steps: (1) crushing, grinding and mixing the aluminiferous materials with ammonium sulfate and then roasting; (2) dissolving the roasted product (clinker aggregate) in water, and filtering to obtain aluminum ammonium sulfate solution and filter residues; (3) carrying out deferrization, aluminum deposition or recrystallization on the aluminium ammonum sulfate solution with ammonia to prepare aluminum oxide, and meanwhile, recycling the ammonium sulfate; (4) preparing silicon dioxide from the filter residues, and taking the remaining residues containing ferrum as the raw material for ironmaking. The method is suitable for treating various aluminiferous materials, has the advantages of simple technical process, simple equipment, no emission of solid, liquid and gas wastes, and no secondary pollution, and realizes the high-added-value green complex utilization of the aluminiferous materials such as bauxite, high ironbauxite, alunite, kaoline, alumina, fly ash, coal gangue, aluminum ash, nepheline, clay and the like.

The invention discloses a dedusting system of a whole factory building, which comprises an air funnel, an air handling unit, a top air-return opening, an air supply pipeline and an air-return pipeline, wherein the air handling unit is arranged outside a workshop, the air funnel is arranged at the lower part of the inner side of the workshop, one end of the air supply pipeline is connected with the air funnel, and the other end of the air supply pipeline is connected with the air handling unit through the air supply pipeline; the top air-return opening is arranged at the top inside the workshop, one end of the air-return pipeline is connected with the top air-return opening and the other end of the air-return pipeline is connected with the air handling unit. The air supply direction of the air funnel is adjusted to change the air distribution of returned air, welding fume with higher temperature drifts upwards under the action of hot buoyancy, the fume further drifts upwards by the push of air sent out from the air funnel and does not move transversely, thereby the welding fume can be avoided from passing through the respiratory zone of the human body; and the fume and harmful gases are sucked into the air handling unit through the air-return pipeline under the suction action of the air-return opening at the top of the workshop and can not be directly removed outdoors, thereby the secondary pollution can not be caused.

The invention discloses a nano-biological water body remediation agent for aquaculture and a preparation method thereof. The nano-biological water body remediation agent comprises a carrier and complex bacteria attached to the carrier, wherein the carrier comprises the following ingredients in percentage by weight: 10-70 wt% of nano tourmaline, 10-70 wt% of nano titanium dioxide, 10-70 wt% of modified zeolite and 10-50 wt% of montmorillonite, and the complex bacteria comprise photosynthetic bacteria, denitrifying bacteria, nitrifying bacteria and phosphorus accumulating bacteria. The nano-biological water body remediation agent for aquaculture, disclosed by the invention, is economical and environment-friendly and is simple and convenient to prepare; the adsorption characteristics of the natural mineral materials are cooperated with the degradation characteristics of the microorganisms, so that organics in a water body can be efficiently adsorbed and degraded, and the remediation efficiency of water quality is higher; and the microorganisms can increase the dissolved oxygen in the water body while harmful substances, such as ammonia nitrogen and hydrogen sulfide, are efficiently decomposed, excellent-quality baits can be supplied to aquatic livestock through the propagation of the microorganisms, and the secondary pollution on the water body cannot be caused.

The invention provides an amido-containing ionic liquid used for absorbing acidic gases and a preparation method and application thereof and in particular relates to a method for absorbing acidic gases of CO2, H2S, SO2 and the like by using an amido-containing ionic liquid. The amido-containing ionic liquid comprises one or more of primary amine, secondary amine and tertiary amine, wherein positive ions of the ionic liquid are derived from organic polyamines, negative ions of the ionic liquid are derived from inorganic acid or organic acid, and the ionic liquid is prepared by mixing the organic polyamines with the inorganic acid or organic acid and then carrying out neutralization reaction through acid and alkali. The ionic liquid has the advantages of low cost, simple preparation method,strong absorbing capability and short balance time, can be used for the enriching of acidic gases, the deacidification refining of acid-containing gases of natural gas, refinery gas, methane, coal gas, synthesis gas, coke-oven gas, pyrolysis gas, smoke, motor vehicle tail gas and the like and the purification of gases under a proper space and an operating environment; meanwhile, the ionic liquid absorbing the acidic gases can release the acidic gases through pressure reduction and temperature raise, thus the absorbing capability of the ionic liquid is restored and the multiple absorption property of the ionic liquid is better.

The invention discloses an environmentally-friendly and highly-efficient recovery and separation technology of lithium ion batteries in waste mobile phones. The technology mainly comprises brine discharge, disassembling and crushing, alkaline leaching, acidic leaching, iron powder displacement copper precipitation, purification and impurity removal, and precursor synthesis. The technology has the characteristics of advanced process, low cost, high efficiency, substantial economic and social benefits, no discharge of three wastes, no secondary pollution to environment, and realization of cycling of mobile phone resources, so the earth is well protected.

The invention discloses a method for resource recovery and classification utilization of urban domestic wastes, which at least comprises the following steps of: a magnetic separation step, a waste cutting step, a elutriation flotation step, a waste extrusion dehydration step, an anaerobic treatment step and a sludge deposition concentration step; scrap iron is separated by the magnetic separationstep for the recovery and utilization of the scrap iron; anaerobic organic matter is crushed by the waste cutting step; pasty organic matter and block non-anaerobic wastes are thoroughly separated bythe elutriation flotation step so as to allow the pasty anaerobic organic matter to enter a biogas generation pool or tank for an anaerobic reaction and to allow the clean non-anaerobic wastes to be extruded, dehydrated and dried for individual treatment, and the waste decrement is above 90%; after elutriation, the left 10% non-anaerobic wastes are prepared into fuel oil by a cracking reaction; or are recycled through screening with no screening difficulty being caused by dust and organic matter containing in the wastes; or are delivered into a gasifier for fuel gas production, which preventsthe energy consumption of water-containing organic matter during waste incineration treatment, and greatly increases the thermal efficiency of waste treatment.

The invention discloses a synthesizing method of cationic polyacrylamide 'water-in-water' emulsion, which is characterized by the following: adopting inorganic solution as dielectric with specific viscosity number is 30-90ml / g low-molecular cationic polymer solution as stabilizer; copolymerizing free radical of cationic monomer with double bond and non-ion monomer to form the product with grain size less than 1um; fitting for disposing urban effluent, oil-field effluent and paper-making domain.

The procedure of the recycling method is to cut the used lithium ion battery and take out the positive plate, process the positive plate with heating process to remove the bond between the aluminum foil and the positive pole material, by means of the mechanical or ultrasound shaking, the aluminum foil and the positive pole material are separated, process the positive pole material with the high-temperature handling, the content of the element in the positive pole material is analyzed. Mixing the lithium compound based on the supplement of the cobalt manganese or the nickel. After high-temperature and grinding processing, the positive pole material with excellent performance is recycled.

The invention relates to environmental pollution plant restoration, specifically to a screening method for heavy metal enriching / accumulating plant. 1)choosing experimental field 2) determining the screening object 3) determining the polluted object 4) potted plant screening experiment for heavy metal The invention chooses weeds as screening object, potted plant experiment , wild sampling and analysis, plot experiment as main means, screen plant for plant restoration. The invention is economic, highly effective, high ecological safety, wide adaptability,

A kitchen garbage disposal method is characterized by including steps of 1, sterilizing, deodorizing, and adding hydrolyzing protease into kitchen waste; 2, screening and crushing the kitchen garbage, sorting wastes such as glass and ceramics which cannot be disposed from deodorized garbage automatically, crushing the residual waste by a crusher; 3, performing solid and liquid separation, separating suspended matters with thickness of 2mm at least and solids and squeezing to dewater to form a tailing product, and discharging oil water into an oil and water separator; 4, performing oil and water separation to separate heavy oil, light oil, sewage and sludge and the like in waste water of the kitchen garbage, feeding the separated oil, sewage and sludge into an oil storage barrel, a sewage treatment device and a sludge collection barrel respectively; 5, purifying sewage by details of feeding the separated sewage into a sewage purifying system which is provided with air flotation and reverse osmosis devices; and 6, treating the tailing solid products by details of hydrolyzing the tailing solid subcritically, subjecting dynamic fermentation to the tailing solid products for two to three days after subcritical hydrolysis treatment, and finally obtaining an organism modifier for soil.

The invention provides a robot for cleaning vertical props, which is composed of a climbing part and a cleaning part. The climbing part comprises two pairs of mechanical arms (3) which are used to clamp tightly rod bodies in turn, a crank and connecting rod mechanism which is used to produce expanding movements and contracting movements, a cam linking mechanism which is used to adjust the expanding movements and the contracting movements, and a motor which is used to provide power for the expanding movements and the contracting movements above, wherein the two pairs of mechanical arms, the crank and connecting rod mechanism, the cam linking mechanism and the motor are evenly installed on a guiding bar (1) which is used to substitute a human body framework, and thereby the robot which imitates climbing movements is formed. The cleaning part comprises two pairs of cleaning brushes (5) which are installed on the guiding bar and always embayed around the cleaning vertical props, injectors (4) which are arranged respectively on upper cleaning brushes, wherein the cleanings of the vertical props can be realized under the effects of water currents which are injected by the injectors and scrubs of the cleaning brushes, and sewage water after being cleaned is flowed into a sewage water collecting ring (15) which is on the bottom of the vertical props along the vertical props. The invention has the advantages of compact structure, convenient use, low energy consumption, high efficiency and non-environmental contamination, and the invention saves labor and material resources. The invention can be used for cleaning operations of the vertical props or tilting bars.

The invention provides a novel sludge curing treatment agent. The curing treatment agent comprises a curing agent A and a curing conditioner B, wherein the curing agent A comprises the following components in percentage by weight: 40-60% of MgO, 5-20% of magnesium chloride salt, 10-20% of SiO2, 10-30% of CaO, 0.1-4% of dehydrating agent and 0-20% of fly ash; the curing conditioner B comprises the following components in percentage by weight: 20-40% of H3PO4, 30-50% of NH4H2PO4 and 20-40% of oxalic acid; the curing agent A accounts for 0.5-10% of the total amount of sludge in treatment by mass; and the curing conditioner B accounts for 0-5% of the total amount of sludge in treatment by mass. By adopting the sludge curing treatment agent provided by the invention to treat the sludge with relatively high water content and particularly water content over 80%, the sludge can be cured generally in 1-2 days, the curing time is short, and the water content is reduced to about 30% 7 days later; after the curing, the water content of the sludge is low; and the sludge after the curing treatment can be subjected to landfill on site or applied to roadbed, greening, earthing, ecological restoration and the like, thereby avoiding secondary pollution to environment.

The leftover and residue of positive electrode of lithium ion battery is crushed mechanically; its active positive electrode material, additive and adhesive attached to the aluminium foil base are separated through ultrasonic vibration, mechanical stirring or other process inside water or some organic solvent at certain temperature; and the active positive electrode material are then separated, washed, dried and high temperature processed to obtain positive electrode material, which has excellent performance and may be used directly. The present invention is significant to lowering battery producing cost and preventing environmental pollution.

The invention discloses efficient heterogeneous catalytic oxidation ferric-carbon micro-electrolysis packing and a preparation method thereof. The packing is prepared from the following raw materials in parts by weight: 45-65 parts of pure iron powder, 10-25 parts of cast iron powder, 2-8 parts of graphite powder, 5-15 parts of active carbon powder, 2-10 parts of copper powder, 2-10 parts of manganese powder, 2-10 parts of aluminum powder, 2-10 parts of fine wood bits, 1-6 parts of sodium silicate, 1-6 parts of sodium borate, 2-6 parts of pyrite dust and 5-15 parts of an adhesive. The efficient heterogeneous catalytic oxidation ferric-carbon micro-electrolysis packing disclosed by the invention is prepared by taking heterogeneous metal alloy with high potential difference as a catalyst and using a high-temperature micropore roasting technology and has the characteristics of heterogeneous metal and ferric-carbon integration, micropore framework type alloy structure, large specific surface area, low density, strong activity, high current density and the like; organic wastewater is treated so that COD, ammonia nitrogen and total phosphorus can be efficiently removed, the chroma can be reduced, the biodegradability can be improved, the treatment effect is extremely stable, and the phenomena of packing passivating, hardening and the like caused in the operation process can be avoided.

The invention relates to a detection technology of copper ions, and in particular relates to a preparation method of a reduced carbon quantum dot containing calcium alginate gel for detecting copper ions. The preparation method of the carbon quantum dot containing calcium alginate gel for detecting the copper ions comprises the following steps of: preparing fluorescent carbon quantum dots; neutralizing the fluorescent carbon quantum dots, adding sodium borohydride into the neutralized fluorescent carbon quantum dots to perform reduction; mixing deionized water with the neutralized fluorescent carbon quantum dots at equal volume, and adding sodium alginate into the mixture to obtain a sodium alginate sol; and spraying a calcium ion solution to the surface of the sol or soaking the sol into the calcium ion solution to perform crosslinking, and drying to obtain the calcium alginate gel. By using the characteristics that the carbon quantum dots have fluorescent characteristics, the fluorescence of the carbon quantum dots is enhanced after reduction, and the calcium alginate can enhance the fluorescent characteristics of the carbon quantum dots, when the copper ions are detected, the cost of an adopted fluorospectro photometer is low, the sample preparation and treatment steps are simple and easy to operate, and the detection sensitivity is high, so that the calcium alginate gel can be widely used for detecting the copper ions.

The invention discloses a preparation method for magnetic biological carbon by one-step synthesis. The preparation method comprises the following steps: air-drying a biomass raw material under a natural condition and then storing for later use, and adding a dried and crushed biomass raw material into a ferric salt solution; slowly stirring a mixed solution, then, regulating a pH (potential of hydrogen) value with an NaOH solution, then, continuously stirring, then, standing until the biomass raw material absorbs the ferric salt solution to reach a saturation state, performing suction filtration to remove free water in the biomass raw material, pyrolyzing a suction filtration-treated biomass raw material in a pyrolyzing furnace to make carbon, and introducing an inert shielding gas into the pyrolyzing furnace to obtain the magnetic biological carbon. According to the preparation method disclosed by the invention, carbonization and magnetization are combined together to synthetize the magnetic biological carbon by one-step pyrolysis; meanwhile, different magnetic biological carbon materials can be obtained by changing the shielding gas (nitrogen or carbon dioxide); an effect of removing typical heavy metal pollutants in a water body is obvious, and moreover, the typical heavy metal pollutants can be separated and recovered from the water body as well so as to protect the environment from secondary pollution.

The invention provides a method for treating organic waste gas by combining photocatalysis and microorganisms. Simultaneously, the invention also discloses a device of the method for treating the organic waste gas by combining the photocatalysis and the microorganisms and application thereof. The method for treating the organic waste gas by combining the photocatalysis and the microorganisms comprises the steps of physical dust removal, photocatalyst catalytic oxidation, microorganism purification, and the like, and can effectively eliminate total suspended particulate matters in the organic waste gas and volatile organic compounds in waste gas. The device of the method for treating the organic waste gas by combining the photocatalysis and the microorganisms is applied to treating industrial organic waste gas, and is particularly applicable to treating the organic waste gas in various industrial organic waste gas emission workshops.

The invention discloses a multifunctional environment-friendly digital terminal. The multifunctional environment-friendly digital terminal comprises a dustbin body, wherein the dustbin body comprises an environment-friendly solar power generating and supplying device, a self-sealing device, a garbage compressing device, an automatic sterilizing / smell-removal / disinfection device, an advertisement rolling device, a citizen assistance seeking and alarming device and a convenient taxi hailing device, wherein an optical energy and solar energy combined board is arranged at the upper part of the dustbin body; a garbage throwing opening is formed in one side surface of the dustbin body, and a dustbin door is arranged on the other side surface of the dustbin body; an assistance seeking button and a taxi hailing button are arranged at the upper part of the garbage throwing opening; a liquid leakage hole is formed in the lower surface of the dustbin body; a liquid collecting tank is arranged at the lower part of the liquid leakage hole; a liquid drainage pipe is arranged on one side of the liquid collecting tank; a base is arranged at the lower part of the dustbin body. The multifunctional environment-friendly digital terminal has the advantages of being simple in structure, convenient to use, and capable of avoiding secondary pollution, reducing odor diffusion, increasing the utilization rate of the dustbin, automatically and periodically spraying to sterilize, automatically carrying out early warning, having a dynamic advertising effect, providing assistance seeking, alarming and intelligent taxi hailing for the citizens.

At present, researchers do the research of reasonable utilization of chrome-containing leather shavings all the time; however, the leather shavings of leather making enterprises are difficult to treat in batch. The invention provides an environment-friendly collagen fiber leather substrate which is characterized by comprising an intermediate-layer fiber web, a surface-layer fiber web tightly connected on the upper surface of the intermediate-layer fiber web, and a bottom-layer fiber web tightly connected on the lower surface of the intermediate-layer fiber web, wherein the surface-layer fiber web and the bottom-layer fiber web respectively comprise the components by mass percentage of: 90 to 97 percent of collagen fibers, 3 to 10 percent of polylactic acid bi-component fibers; the intermediate-layer fiber web is made of polylactic acid bi-component fibers; the weight of the surface-layer fiber web and the weight of the bottom-layer fiber web are both 30 to 150 grams per square meter; and the weight of the intermediate-layer fiber web is 10 to 30 grams per square meter. The non-woven synthetic leather substrate prepared by using collagen fiber extracted from leather leftovers has good simulation performance, avoids secondary pollution to the environment, and is beneficial to the follow-up coating of PU (polyurethane).

The invention discloses a preparation method of microsphere particles capable of slowly releasing nitrogen and adsorbing-biologically degrading petroleum hydrocarbon. The method comprises the following steps of: weighing a urea aqueous solution and a formaldehyde aqueous solution at a ratio of 6.5:1, and adjusting the pH value of the urea aqueous solution to 7.2-7.4; adding formaldehyde into the urea aqueous solution, stirring for 90-100 minutes, adjusting the pH value to 3.2-3.4, and adding deionized water to obtain mixed liquid M1; mixing the chloroform solutions of poly(beta)hydroxybutyrate and polyethylene glycol at a ratio of 5:1; dropwise adding M1 into the chloroform mixed liquid at a ratio of 1:4; dropwise adding the mixed liquid into a polyvinyl alcohol solution with mass fraction of 3.5% at a ratio of 1:1; dropwise adding a polyvinyl alcohol solution with mass fraction of 0.5% into the mixed liquid at a ratio of 2:1, stirring for 7-8 hours, separating, and freeze-drying to obtain microsphere particles; and culturing the microsphere particles in a petroleum hydrocarbon degrading bacterium culture solution for 24 hours, taking out and air-drying. Through the invention, the preparation technology is simple, the efficiency of the prepared microsphere particles for treating petroleum hydrocarbon pollutants is high, and secondary pollution and damage to the water body are avoided.

The invention provides a slow release fertilizer suitable for integration of water and fertilizer. The slow release fertilizer is a nanocapsule slow release fertilizer formed by using chemical fertilizers as core materials and using slowly soluble polymers as wall materials and can be dispersed in water to form a colloidal solution and achieve the aims of slow release and controlled release. The invention further provides a preparation method of the slow release fertilizer. Capsule wall materials of the slow release fertilizer, namely slowly soluble polymers with opposite charges, are mixed and then carry out polymerization reaction and coat the core materials, and the materials are solidified by a crosslinking agent and are filtered and dried, thus obtaining the nanocapsule slow release fertilizer. The slow release fertilizer can be dispersed in water to form the colloidal solution and can be used for irrigation together with water. The capsule wall materials are the slowly soluble polymers, can be slowly dissolved in soil to achieve the aim of controlled release and can not cause secondary pollution to the soil.

A modified floating denitrifying-dephosphorizing material for treating the water in river and lake or the sewage is proportionally prepared from La, Ce, Al and Ca ions, light aggregate with large specific surface area, powdered coal ash, surfactant, cement, etc through mixing, impregnating in water, filtering and calcining.

The invention relates to a method for treating highly concentrated ammonian wastewater with poor biodegradability by using a multiple-technique combination, which belongs to the technical field of wastewater treatment. The method is characterized in that: the ammonian wastewater primarily enters a pH adjusting tank for adjusting the pH value to be 11-12.5 and enters a blow-off tower for blowing off with the gas-liquid ratio being 3000-4500, the blown-off wastewater enters a chemical precipitation tank, magnesium salts and phosphates are added according to the mol ratio of Mg : N : P being 1.4-1.7:1:1 for reacting with the wastewater to generate ammonium magnesium phosphate precipitate for removing ammonian, yielding water enters a break point chlorination tank, chlorine-containing oxide is added according to the weight ratio Cl / N being 9-12:1 of active chlorine and ammonian, the wastewater is transferred to a reducing tank after the reaction, reducing agent is added according to 1-1.1 times of theoretical mol value of the yielding water completely reacting with residual chlorine, and the wastewater can be directly discharged after the reaction. The treatment method has simple operation, high reaction speed and low wastewater treatment cost, and can lead ammonian to be recovered without secondary pollution to environment; and the yielding water can reach primary emission standard.

The invention relates to a dynamic control method for sewage treatment, which comprises the following steps: adopting sensors to input the COD signal and the liquid-level signal to an analysis control device; calculating the COD load rate after the comparison with the terminal effluent requirement; carrying out the biochemical treatment of sewage according to the reaction times of the relevant procedures and the control parameters which are calculated on basis of the COD load rate; comparing the COD value of the discharged or reclaim water body with the standard value; and discharging or reclaiming if the COD value meets the standard and otherwise carrying out the secondary treatment. The devices used in dynamic control method further include COD concentration sensors, liquid level sensors and dissolved oxygen concentration sensors, which are arranged inside a water inlet regulating pond, a biochemical pond and an intermediate regulating pond respectively. The sensors are connected with the analysis control device. The dynamic control method integrally adopts the dynamic control mode, can accurately control the water treatment capacity and the aeration capacity in unit time, and ensure that the water discharge meets the water quality standard completely on the premise of the minimal energy consumption.

The invention relates to a vulcanizing-agent-modified Fe3O4 magnetic nanoparticle adsorbent and a preparation method and an application thereof. The adsorbent is Fe3O4 magnetic nanoparticles which are subjected to surface vulcanization by a sulfur compound, and the weight percentage of sulfide on the adsorbent is 10-15 percent. The adsorbent is added into heavy metal wastewater and fully contacts with heavy metal ions through stirring, Fe2+ ions of the surface of the adsorbent material are utilized to exchange with the heavy metal ions so as to adsorb the heavy metal ions in the wastewater, and the adsorbent is separated from the wastewater by utilizing a magnet. Compared with the prior art, the prepared adsorbent has the advantages of low cost, large adsorption capacity, high reaction speed, significant processing effect and the like. Meanwhile, the magnetism can be quickly enriched under the action of an external magnetic field, and therefore, the adsorbent can be effectively separated and recycled and cannot cause secondary pollution.

The invention discloses a preparation method of a magnetic core-shell alginate microsphere adsorbent. The preparation method comprises the following steps: preparing two parts of sodium alginate solution, wherein one part is shell layer solution, and dichloromethane and nanometer ferroferric oxide are added into the other part and uniformly mixed to obtain nuclear layer solution; and respectively injecting the shell layer solution and the nuclear layer solution into the outer layer and the inner layer of a stainless steel coaxial needle head, jetting the shell layer solution and the nuclear layer solution into a receiving device filled with calcium chloride solution under high-pressure electrostatic jetting conditions by utilizing high-pressure electrostatic spinning equipment, stirring, filtering, then, immersing the microsphere in metal salt solution, stirring, filtering, and drying to prepare the magnetic core-shell alginate microsphere adsorbent. The magnetic core-shell alginate microsphere adsorbent has the adsorptive property of an alginate gel microsphere adsorbent to a part of anion and also has magnetic property; therefore, an adsorbing material is more convenient and rapid to recycle; the use recovery cost is reduced; the application range is enlarged; and the preparation method can be widely applied to anion adsorption concentration, settling separation and waste water treatment.

The invention relates to a preparation method of a biomass carbon fertilizer, which comprises the following three steps of: 1) air-drying and crushing a biomass raw material; 2) putting the biomass raw material obtained in the step 1) into modifier solution with a concentration of 1-10 percent to soak for 8-24 hours, and drying at a temperature of 80-100 DEG C; and 3) pre-oxidizing the biomass raw material dried in the step 2) in a box type furnace for 0.5-2 hours at a temperature of 245 DEG C, then carbonizing for 0.5-4 hours at a temperature of 250-650 DEG C and under the anoxic and anaerobic conditions, grinding and sieving with a 10-100-mesh sieve to prepare the biomass carbon fertilizer. A use method of the biomass carbon fertilizer comprises the following three steps of: 1, applying the prepared biomass carbon fertilizer in farmland soil according to the 100-1000 kilograms / hectare; 2, ploughing 0-30 centimeters of soil on a surface layer in the fertilized farmland soil, so that the biomass carbon fertilizer is uniformly mixed with the soil; and 3, planting crops in the soil applied with the biomass carbon fertilizer to obtain a higher-quality crop product.

The invention relates to a method for preparing magnesia, silicon dioxide and nickel oxide products from lateritic nickel ores. The method comprises the following steps: (1), crushing, grinding and roasting the lateritic nickel ores with ammonium sulfate; (2), dissolving and filtering roasted products; (3), evaporating, condensing and crystallizing filtrate to prepare magnesium sulfate; (4), dehydrating and calcining the magnesium sulfate to prepare magnesia; (5), reacting filter residue with an alkaline solution or molten caustic soda, leaching and filtering the product of reaction to obtain a sodium silicate solution; (6), carbonizing, decomposing, filtering, washing and drying the sodium silicate solution to prepare the silicon dioxide; (7), leaching and filtering the residual filter residue by an ammonium carbonate solution; and (8), distilling ammonia from the filtrate and calcining the filtrate to prepare the nickel oxide. The residual residue is ferric oxide containing a small amount of impurities and can be used as an iron-making raw material or deep processed into a product with a high added value. The method is suitable for processing various lateritic nickel ores, has simple technological process and simple and convenient equipment, does not emit solid, liquid and gas waste or cause secondary pollution and uses lower cost to realize the high added value comprehensive utilization of lateritic nickel ore resources.