16results about How to "Reduce alkalinity" patented technology

This invention relates to the field of heavy metal contaminated water or soil remediation technology, and discloses the application of magnesium-based cementitious materials in heavy metal ion remediation in ultra-stable mineralized environments. This invention can achieve good heavy metal adsorption effects in a short time, without the release of toxic substances or secondary pollution, and is suitable for the remediation of heavy metal contaminated water or soil.

The application discloses a preparation method of a silicate cement porous vegetation concrete material, and comprises the following steps: calcining coal-based kaolin to obtain activated coal-based kaolin; adding the activated coal-based kaolin and a water reducing agent into mixing water, and performing ultrasonic dispersion to form an activated coal-based kaolin suspension; weighing silicate cement, concrete recycled aggregates and fertilizer, and uniformly mixing to form dry materials; uniformly mixing the activated coal-based kaolin suspension and the dry materials, and loading into a mold for forming; and performing film covering and curing. The application is free from the low-alkalinity porous vegetation concrete system of a sulphoaluminate cement used in the preparation of a porous vegetation concrete in the prior art, and utilizes the activated coal-based kaolin after calcination and ultrasonic treatment as a main alkali-reducing agent to reduce the alkalinity of the silicate cement according to the condition that coal-based kaolin resources are rich, and the activated coal-based kaolin is matched with the fertilizer and the concrete recycled aggregates to provide a new material with rich raw material sources and low cost for ecological protection of a slope and a bank.

The invention discloses an ion exchange washing alkaline water recycling system, and relates to the field of water treatment. The system comprises an anion exchanger, a washing alkaline water collection pipeline, an online monitoring unit, a shunting switching unit, a weak acid cation exchange treatment unit, an acid liquid regeneration unit, a pipeline conveying pump, a decarburization unit, an intermediate water tank, a recycling unit and a control unit. The online monitoring unit is arranged at the washing drainage end of the anion exchanger, the water quality of the washing alkaline water is detected in real time, and graded recovery of the washing alkaline water is achieved in combination with the shunt switching unit; the recycled washing alkaline water enters a weak acid cation exchange treatment unit to be subjected to ion exchange treatment so as to reduce the alkalinity of the water body; meanwhile, the weak-acid cation exchange resin is regenerated by utilizing acidic waste liquid generated by regeneration of the cation exchange bed, so that synergistic utilization of acid and alkali resources is realized; the treated water body sequentially passes through the decarburization unit and the middle water tank and then is reused for the pure water preparation system.

The application discloses a preparation method of aluminum dialkyl hypophosphite with different alkyl groups, and comprises the following steps: (1) dispersing aluminum hypophosphite solid in a low concentration in a solvent system containing alkali metal hydroxide and water, the mass ratio of the aluminum hypophosphite solid to water being 1:20-1000; under the initiation of a free radical initiator, making olefin 1 and the aluminum hypophosphite solid to have an addition reaction at 100-150 DEG C and 0.1-0.3 MPa, and controlling the consumption of the olefin 1 to be sufficient for the reaction of the aluminum hypophosphite solid, so as to prepare an aluminum monoalkyl hypophosphite solution, filtering the precipitate, and collecting the filtrate; (2) continuously feeding olefin 2 different from the olefin 1 into the filtrate, and making the aluminum monoalkyl hypophosphite and the olefin 2 to have an addition reaction under the initiation of the free radical initiator at 100-150 DEG C and 0.1-0.3 MPa, so as to obtain aluminum dialkyl hypophosphite with different alkyl groups. The purity of the aluminum dialkyl hypophosphite with different alkyl groups prepared by the application is above 99.5%.

The invention relates to the technical field of drinking water treatment, and discloses a multifunctional and integrated composite micro-polluted underground water treatment device and method.The device is mainly composed of three main devices including an aeration column, a chemical crystallization circulating granulation fluidized bed and a catalytic oxidation filter column and a matched system; the aeration column aerates the raw water subjected to acid adding treatment to reduce the alkalinity of the raw water, the chemical crystallization circulating granulation fluidized bed can remove hardness, iron and manganese in incoming water, effluent of the crystallization fluidized bed enters the catalytic oxidation filter column to be filtered, and manganese, ammonia nitrogen, bacteria and microorganisms in the water are further removed through an internal catalytic oxidation active filter material; the whole set of system combination of the multifunctional and integrated composite micro-polluted underground water treatment device can achieve the functions of softening, iron removal, manganese removal, turbidity removal, ammonia nitrogen removal, bacteria removal and microorganism removal on micro-polluted underground water, and effluent can directly reach the drinking water standard.

This invention provides a *Roseolariomoraxella salina* strain for saline-alkali soil improvement, with accession number CGMCC No. 36067. The *Roseolariomoraxella salina* strain provided by this invention exhibits significant comprehensive application advantages. This strain demonstrates excellent survival and growth capabilities under saline-alkali stress, effectively reducing salinity and alkalinity in saline-alkali soils and thus improving the saline-alkali environment. Whole-genome analysis shows that this strain carries multiple functional genes related to osmotic regulation and ion transport, providing a molecular basis for its salinity-reducing ability. Adding citric acid or betaine can further enhance its salinity-reducing performance, and its biomass is significantly increased after optimization of fermentation conditions. This strain shows promising application prospects in saline-alkali soil improvement and saline-alkali aquaculture environment management.

The invention relates to the technical field of soil improvement and crop disease prevention and control. The invention provides a zinc-silicon synergistic soil conditioner and a preparation method and application thereof.The zinc-silicon synergistic soil conditioner is prepared from, by mass, 5-8 parts of citric acid chelated zinc, 5-8 parts of citric acid chelated zinc, 5-8 parts of citric acid chelated zinc, 5-8 parts of citric acid chelated zinc, 5-8 parts of citric acid chelated zinc, 5- 25 to 40 parts of potassium silicate; 30 to 45 parts of humic acid; 5 to 10 parts of soluble starch; and the balance of deionized water. According to the zinc-silicon synergistic soil conditioner, the pH and the alkalization degree of soda saline-alkali soil are reduced through humic acid, and the rhizosphere microenvironment is improved; the citric acid chelated zinc provides quick-acting zinc, the potassium silicate continuously releases silicon, and the citric acid chelated zinc and the potassium silicate keep high bioavailability under the protection of humic acid; the soluble starch regulates nutrient release and prevents precipitation and inactivation. Field application shows that the morbidity of the rice red blight in the soda saline-alkali soil can be reduced to 5% or below, and synergistic interaction of soil improvement and disease prevention and control is achieved.

The application discloses high-sulfur steel, including components and mass percentage: C: 0.67%-0.73%, Si: 0.15%-0.25%, Mn: 0.45%-0.65%, P: ≤0.045%, S: 0.060%-0.070%, Cr: 0.10%-0.20%, Mo: ≤0.06%, Ni: ≤0.20%, V: 0.03%-0.04%, Al: ≤0.03%, N: 0.012%-0.016%, the balance is Fe and impurities.The application provides a preparation process of high-sulfur steel, including the following steps: step S1, converter process; step S2, refining process; step S3, VD process; step S4, continuous casting process.The beneficial effect is that the Al content in the steel is controlled at a relatively high level to offset the secondary oxidation caused by the addition of quartz sand at the end of the refining, that is, the low oxygen state in the steel is ensured by Al.

The application discloses a method for converting converter tailings, LF refining slag and LF dust into slag, and utilizes solid wastes generated by a long-process steel enterprise, i.e., fly ash and LF refining dust, as a conditioning material, uses a steel slag ladle as a reaction kettle, and adds the conditioning material into liquid refining slag to perform mineralization reaction, so as to convert the converter tailings, the LF refining slag and the LF dust into cementitious material resources with slag components, and achieve the purpose of expanding the resource utilization ways of the converter tailings, the LF refining slag and the LF dust, and highlighting the power of cross innovation in different technical fields.

The invention discloses a composite soilless lawn matrix material and a preparation method and application thereof, and belongs to the technical field of steel slag resource utilization. A composite soilless lawn matrix more suitable for plant cultivation can be obtained through modification treatment of a phosphoric acid solution on converter slag particles and the synergistic effect of double slag and mushroom residue fibers; the vertical stem density of the plants and the lawn coverage are effectively improved. In the prepared matrix material, sufficient supply of iron, magnesium and other elements in the converter slag particles and the blast furnace slag micro powder promotes development of chloroplasts and synthesis of chlorophyll. The composition of the converter slag particles, the blast furnace slag micro powder and the mushroom dreg fibers can preferentially promote the plants to grow underground parts so as to improve the water and nutrient absorption capability.

The application discloses a saline-alkali soil composite improver and a preparation method thereof, relates to the technical field of soil improvement, and raw materials include 18-22 parts of ion intercalation modified expanded vermiculite, 10-14 parts of humic acid, 0.2-0.4 parts of polyacrylamide, 6-9 parts of urea, 5-7 parts of diammonium phosphate, 4-6 parts of potassium sulfate, and 10-18 parts of iron modified biochar-attapulgite composite carrier immobilized microbial inoculant. The saline-alkali soil composite improver has excellent saline-alkali soil improvement effect.

The application discloses a kind of coastal saline-alkali grassland severe salt spot hard soil in situ loose repair method, belong to saline-alkali soil improvement technical field.For the problem that existing mechanical ploughing is easy to be turned to deep layer salt and compacts lower soil, the method of the application is when soil moisture content is 70%~80% of field capacity, the lance is penetrated to 40~60cm hard soil layer under ground surface, high-pressure gas is released to form pore fissure, then high-pressure gas injection soil amendment mixture is carried out, the lance is taken out after expanding hole and filling in gravel layer and coarse sand and calcium oxide mixture sand column layer in turn.The application is used for in situ loose repair of severe salt spot hard soil, which can improve deep soil structure and continuously discharge salt.

The application discloses a growth promoter for improving the seedling emergence rate of cotton in saline-alkali soil, and the salt resistance of cotton seed germination is improved by using rapeseed euricin regulator and GABA permeation regulator; the stable agent formed by strong acid materials such as urea phosphate can quickly reduce the pH value and saline-alkali of the soil tillage layer; meanwhile, the urea phosphate, amino acid, fulvic acid and auxiliary materials provide certain nutrient substances for seedling crops; the cooperation among raw materials fundamentally improves the salt tolerance of cotton seedling, not only improves the seedling emergence rate of cotton, but also can quickly reduce the pH value of saline-alkali soil in Xinjiang after dissolving water, improves the chemical composition of soil, reduces the salt content and alkalinity of soil, creates a good environment for crop growth, and after application, the soil salt content is below 20 g / kg, the pH value is below 7.5, the seedling emergence rate of cotton is above 70%, which is more than 30% higher than that of the control, and the yield of cotton in saline-alkali soil in Xinjiang is significantly increased, thereby providing technical support for rural revitalization.

This invention belongs to the field of wastewater biological treatment technology and resource recovery, and discloses a system and method for achieving simultaneous nitrogen removal and phosphorus recovery from anaerobic digestion liquid based on nitrification-anaerobic ammonium oxidation coupled with magnesium-phosphorus crystallization. The system of this invention includes: a raw water tank, a nitrification reactor, an intermediate tank, an anaerobic ammonium oxidation reactor, and a magnesium salt solution storage tank; wherein, the raw water tank, nitrification reactor, intermediate tank, and anaerobic ammonium oxidation reactor are sequentially connected by water pumps and pipelines. The anaerobic ammonium oxidation reactor includes a reflux device consisting of a reflux pipe and a reflux water pump. The magnesium salt solution storage tank is connected to the bottom of the anaerobic ammonium oxidation reactor via water pumps and pipelines. After entering the system of this invention, wastewater undergoes sequential nitrification and anaerobic ammonium oxidation coupled with magnesium salt precipitation, solving the problem of sludge easily floating and being lost with air bubbles in the anaerobic ammonium oxidation reactor, and simultaneously achieving nitrogen and phosphorus removal efficiencies of over 85% and 75% respectively in the wastewater.

This invention relates to a doped and modified sodium ion layered metal oxide cathode material, its preparation method, and its applications. The material obtained by cation doping is Na... 0.9 Ni 0.3 Fe 0.3 Mn 0.3 A x B y O2, x+y=0.1, 0≤x≤0.1, 0≤y≤0.1, 0.8≤z≤0.9; the purpose of doping is to improve structural stability, reduce residual alkali, and improve rate capability and cycle life. The prepared metal oxide is a blocky (plate-like) monocrystalline layered material with a smooth and rounded surface; it can also improve the battery's cycle performance and safety performance. A binder composed of polyvinylidene fluoride and polyacrylonitrile was selected when preparing the electrode, which can further improve the stability of the battery's positive electrode.

The invention provides NaY zeolite and a preparation method thereof.The preparation method comprises the steps that an alkali source, an aluminum source, a silicon source and water are mixed in proportion, and a guiding agent is obtained; the method comprises the following steps: firstly, pretreating a guiding agent, an alkali source and an aluminum source according to the molar ratio of (10-20) Na2O: Al2O3: (5-20) SiO2: (150-450) H2O; adding a silicon source, an alkali source, an aluminum source and water according to the molar ratio of (1.5-4) Na2O: Al2O3: (5-10) SiO2: (100-300) H2O, and treating again to obtain gel; and dehydrating the gel to 45-90% of the original weight, and crystallizing to obtain the NaY zeolite. According to the method, the gel is prepared by adopting a specific charging sequence, and then the gel is subjected to dehydration treatment, so that the related ratio of a synthesis system is changed, and the NaY zeolite with high crystallinity, high silica-alumina ratio, nanosheet shape and small crystal grains is obtained through crystallization.