114results about How to "Reduce the content of heavy metal ions" patented technology

The invention discloses compound used for removing heavy metal ions. Compound structurally comprising functional groups capable of providing lone pair electrons is loaded on a polymer carrier and can form coordinate bonds with the heavy metal ions. The compound can remove heavy metal ions in traditional Chinese medication extract or industrial waste water and the like high-efficiently and rapidly, thereby having industrializing prospect.

The invention discloses a eucalyptus dissolving pulp and a production method thereof, wherein the eucalyptus dissolving pulp is prepared after the steam prehydrolysis, sulfate cooking, oxygen delignification and D0EoPD1 bleaching of eucalyptus pieces, the whiteness is not less than 88%, the alpha cellulose is not less than 94.5%, the pentosan is not higher than 3.0%, the dynamic viscosity is 9-25mPa s, the ash content is not higher than 0.1%, and the iron content is not higher than 15mg kg<-1>. The production method of the eucalyptus dissolving pulp comprises the following steps that: the eucalyptus pieces undergo the steam prehydrolysis, and the P- factor of the steam prehydrolysis is 300-800; the sulfate cooking is carried out after the steam prehydrolysis of the eucalyptus pieces to obtain the pulp; the eucalyptus chemical pulp undergoes the D0EoPD1 bleaching after the oxygen delignification; and after the bleaching, the pulp is washed, dried and processed into the eucalyptus dissolving pulp.

The invention provides a treatment method for high-concentration mixed salt organic wastewater. The treatment method for the high-concentration mixed salt organic wastewater comprises the following steps: carrying out coagulating sedimentation on the high-concentration mixed salt organic wastewater, so as to obtain sediments and mixed liquor; carrying out vacuum fractionation on the mixed liquor, so as to obtain fraction and fractional distillate; carrying out evaporative crystallization on the fractional distillate, so as to obtain sodium salt and low-concentration mixed salt organic condensate wastewater; carrying out aerobic biological treatment on the low-concentration mixed salt organic condensate wastewater, so as to obtain low-concentration organic wastewater; carrying out reverse osmosis treatment on the low-concentration organic wastewater, so as to obtain treated wastewater and a reverse osmosis concentrate solution; and carrying out evaporative crystallization on the reverse osmosis concentrate solution, so as to obtain sodium salt, wherein the high-concentration mixed salt organic wastewater contains sodium salt, heavy metal ions and organic matters. The treatment method for the high-concentration mixed salt organic wastewater has the advantages that the sodium salt in the wastewater can be efficiently recycled, treated wastewater can meet industrial usage requirements, reuse rate is high, and zero wastewater discharge is realized. The invention also provides a treatment system for the high-concentration mixed salt organic wastewater.

The invention relates to an acid-and-alkali-corrosion-resistant environment-friendly lubricating grease composition and a preparation method. The acid-and-alkali-corrosion-resistant environment-friendly lubricating grease composition is prepared from 20%-30% of high alkali synthesis calcium sulfonate, 0.1%-2% of conversion accelerant, 0.1%-3% of glacial acetic acid, 1%-4% of fatty acid, 0.1%-4% of phosphoric acid, 1%-3% of calcium hydroxide, 1.5%-7.5% of additives and high-viscosity synthetic base oil. An acid solution or an alkaline solution with the mass fraction of 10% is added to lubricating grease for conducting performance testing again, and the lubricating grease prepared from high alkali synthesis calcium sulfonate has the better water resistance, corrosion resistance, shearing resistance and extreme pressure antiwear property. Due to the characteristics of the high-viscosity synthetic base oil and a calcium sulfonate thickening agent, no emulsification or thinning phenomenon occurs to the lubricating grease when the lubricating grease is immersed in the acid solution or the alkaline solution, and the good adhesion property is achieved. Due to the fact that a strong ion exchanger, namely, calcium hydroxylapatite is added, calcium ions in molecules can replace heavy metal ions and the like in a water solution, and the good environment-friendly effect is shown.

The invention discloses bitter almond oil and an extraction method thereof. Bitter almonds are taken as raw materials, a low-temperature and biological processing technique is adopted in the whole process, loss of thermal-sensitive nutritional substances such as protein, higher fatty acid, vitamins and the like in the bitter almonds is effectively avoided, free oil, an emulsion, hydrolysate and almond dregs are obtained after microwave radiation sterilization, frozen-breaking, enzymolysis and vacuum centrifugation, free oil is obtained after the emulsion is subjected to biological demulsification and vacuum centrifugation, all the free oil is combined, and the bitter almond oil is obtained, wherein the bitter almond oil has a high oil extraction rate being 93%-97%, the content of nutritional and active substances is high, the food safety is high, the residual amount of cyanide is under 0.08 mg / kg, and the guarantee period of the bitter almond oil is long and can reach 5-6 years. With the adoption of the extraction method, the quality and the yield of products are improved, meanwhile, the variety, the yield and the additional value of byproducts obtained after the oil is extracted are increased, the extraction cost of the oil is further reduced, discharging of three wastes is avoided, environment protection is realized, and low-carbon production is truly realized.

The invention discloses a method for removing EDTA (Ethylene Diamine Tetraacetic Acid) in rinsing waste water. According to the method, three process units, namely oxidation treatment under ultraviolet irradiation, flocculation and sedimentation and pH value callback are adopted. According to the method, hydrogen peroxide is oxidized under ultraviolet irradiation in the presence of a specific catalyst so as to realize EDTA removal of the rinsing waste water containing EDTA, and the problem of membrane blockage caused by existence of an EDTA complex during a water recycling process is effectively solved. Meanwhile, by virtue of the method provided by the invention, EDTA removal and metal ion content reduction are realized simultaneously, the problems of high energy consumption and long cycle in the conventional treatment process of waste water containing EDTA are solved, and the purposes of low equipment investment, small occupied area, slight equipment transformation and low operating cost are achieved. Meanwhile, the problem that waste water containing heavy metals and waste water containing EDTA cannot be treated simultaneously by a biochemical method is solved.

The invention relates to mineral processing process, in particular to process for selecting marmatite from high ferric sulphide ore. The process includes the steps of ore grinding, roughing I, fine selecting and primary tailing disposing. The process for selecting marmatite from high ferric sulphide ore can effectively reduce usage of lime, achieves the purposes of energy conservation and environment protection, improves recovery rate and grade of the marmatite, can well separate the marmatite from the high ferric sulphide ore, improves indium-containing grade, and achieves comprehensive utilization effects of ore resources.

The invention discloses a method for removing heavy metal ions in fruit and vegetable juice by using chelate resin in cooperative treatment. At least two kinds of chelate resin are added into fruit and vegetable juice needing removing heavy metal irons, the chelate resin includes selective arsenic removing resin, selective hydragyrum removing resin or selective cuprum / nickel removing resin. In the method, by utilizing specific chelations of functional groups of modified chelate resins to different heavy metal irons, more than two kinds of special chelate resin for removing certain heavy metal irons are selected and organically combined so as to effectively, fast and conveniently remove heavy metal irons in fruit and vegetable juice. The method is easy and convenient to use, has fast effect, and is especially suitable for removing heavy metal irons in fruit and vegetable juice on site.

The invention discloses a planting method of selenium-enriched organic rice. The method comprises the steps of 1, field management, wherein a heavy metal adsorbing material with a thickness of 5-10 cm is laid after rice field soil is deeply plowed by 55-70 cm, then soil refilling is carried out, next, underground water is poured to soak the rice field for 20-30 days, again, the soil is exposed under the sun for 3-5 days after the water is drained, the heavy metal adsorbing material is taken out, and finally, an inorganic fertilizer with a thickness of 2-4 cm is buried at the 10-15 cm position of the soil; 2, transplanting management; 3, fertilization management, wherein firstly an active material is sprayed 1-3 hours before a selenium-rich leaf force fertilizer is sprayed, and the spraying quantity of the active material is 10-20 kg / mu. The selenium-rich organic rice planted through the planting method is fine and long in granule, crystal, transparent, soft and non-stick, the content of organic selenium is high, the incidence of diseases and insect pests is low, the content of heavy metal is low, and the selenium-rich organic rice has market competitiveness.

The invention provides a preparation method of a modified extracting solution and a method for reducing contents of heavy metal ions in a papermaking method tobacco sheet. The extracting solution is prepared by adopting modified epidesmine, and used for a technology for the low contents of the heavy metal ions in dipping and coating production of the papermaking method tobacco sheet. The available heavy metal materials are mainly produced by factors such as soil, air and fertilizer for tobacco planting, and a mechanical contact in a tobacco manufacturing procedure, and tobacco stems and tobacco powder for manufacturing the tobacco sheet come from natural tobacco leaves. A paper base is recoated by extracts of the tobacco stems and tobacco powder in the manufacturing process of the papermaking method tobacco sheet. The modified epidesmine has a very good ion-exchange property; and after the epidesmine is added to recoated paint for reaction, the modified zeolite is removed by filtering, so that the contents of the heavy metal ions in the tobacco sheet are lowered, cigarettes have no offensive odor, and the method has the characteristic of simple technology, and the cost is lowered.

The invention discloses an improved saline-alkali soil type bio-organic compound fertilizer and a preparation method thereof, and belongs to the technical field of fertilizers. The bio-organic compound fertilizer is prepared from beer wastewater treatment station sludge, weathered coal, agricultural production wastes, trace elements, zinc ion-porphyrin nanocomplex, vermiculite powder, livestock manure biogas slurry, a compound microbial agent, humic acid, edible fungus residue and polycaprolactone according to a certain weight ratio. The bio-organic compound fertilizer is suitable for medium-light saline-alkali soil, can significantly reduce the content of alkali and salt in soil, significantly improve physical and chemical properties of soil, improve soil granular structure, alleviate soil hardening problem and improve soil permeability and water and fertilizer retention, improves utilization rate, and significantly increases the yield and income of crops.

The invention discloses a fly ash and coal ash hydrothermal reaction solid-liquid phase product cooperative treatment method, and belongs to the technical field of fly ash hydrothermal treatment. The method comprises the following steps: mixing fly ash, coal ash, a treating agent and ultrapure water, and carrying out hydrothermal treatment; the pH value of the treating agent is 11-13, the treating agent comprises a treating agent A, and the treating agent A is an alkaline solution with the ionization equilibrium constant KA larger than 0.05; the treatment agent B is an alkaline solution of which the ionization equilibrium constant KB of primary ionization is equal to 10 <-6 >-10 <-3 >; the treatment agent C is Ca < 2 + > salt with the concentration from 10 <-5 > mol / L to 10 <-3 > mol / L. According to the method, the heavy metal content in the hydrothermal liquid can be effectively reduced while the heavy metal concentration in the hydrothermal solid-phase product is reduced.

The present invention discloses a method for producing chitin / chitosan from the shell of silkworm chrysalis, fly larvina, which comprises: to break into pieces to progress the shell of silkworm chrysalis, fly larvina by dry or wet method; React the fine grits obtained with the fat enzyme and protein enzyme from micro-organism by a enzymolysis reaction in order to to eliminate the fat and protein contained in the chrysalis / larvina raw material; bleach using two-step method; Collect the materials after bleach and to wash, dry materials to obtain chitin product; Obtain chitosan by to circulateto cast off Acetyl reaction in a Rhizopus oryzae full cell immobilization biology reaction vessel; Obtain height hydrosoluble shel oligosaccharide by liquid submerged fermentation chitosan using acidformers. The present invention improves the quality of the product and the efficiency of production; reduces greatly the energy cost, the usage of acid, alkali, oxidant and other harmful chemistry thing and the discharge of effluent, waste residue; produces byproducts of high value at the same time; utilizes the resources integratedly; and increases the benefits of production.