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111results about How to "Achieve detoxification" patented technology

Chromic slag wet method detoxifcation and resource comprehensive utilization new technique

A new harmless comprehensive utilization technique for wet processing chromic slag comprises steps as follows: ball milling chromic slag to 80-200 meshes, adding water to prepare slurry, immersing the slurry in hydrochloric acid solution, regulating the pH to 5-6, performing solid-liquid separation with filter press, in the immersion liquid after separation, the hexavalent chrome is reduced to trivalent chromium, adding sodium hudroxide aqueous solution, regulating the pH to 4-6, roughly preparing chromic hydroxide, adding sulfuric acid into filtrate, regulating the pH to 5-6, removing the calcium coprecipitated with magnesium in the rest filtrate, preparing the 2-water calcium sulphate whisker, adding alkali to the filtrate after filter-pressing to regulate the pH to 9-12 to synthesize super-fine magnesium hydroxide powder; the solution after filter-pressing is concentrated to prepare sodium chloride. The main contents of extracts within the chromic slag treated by wet processing all can meet primary, secondary or even accredited national or ministerial standard. The technique can thoroughly detoxicate Cr<6+> in chromic slag and can prepare nine products, includiing chromic hydroxide, magnesium hydroxide, ammonium hydroxide, silicon dioxide, magnetic ferrous ferricoxide, 2-water calcium sulphate, corundum intermediate, sodium chloride, and tailings-chromite; and the extracts after processing chromic slag have high quality.
Owner:杨恩清 +1

Bipolar membrane dual-liquid flow type hydroxyl radical generator

The invention relates to a bipolar membrane dual-liquid flow type hydroxyl radical generator, belonging to the technical field of electrochemistry electrolytic oxidation. The bipolar membrane dual-liquid flow type hydroxyl radical generator is composed of a cathode, an anode and a bipolar membrane located between the cathode and the anode. A cathode liquid chamber is formed between the bipolar membrane and the cathode; an anode liquid chamber is formed between the bipolar membrane and the anode; both the cathode and the anode adopt a single face electrode with a panel structure; and the cathode, the anode and the bipolar membrane are parallel to each other. The invention ensures that high-concentration hydroxyl radical strong oxidant solution can be generated by very low voltage and very high electricity efficiency, the effects of water sterilization, disinfection, decoloration, deodorization, and the like are superior to that of ozone, chlorine and other oxidants, has no toxicity, residue and secondary pollution. The invention has a plurality of innovations that bipolar membrane energy-saving dissociation molecules are inserted between electrolytic cells to supply OH to produce .HO, lead-free tin oxide semiconductor electrode is supplied for a cavity (h+) without lead to pollute water body, and a dual-liquid stream structure is used so that the concentration of .HO is never saturated.
Owner:薛廷芳

Graphene/silicon dioxide-polypyrrole composite material as well as preparation method and application thereof

The invention discloses a graphene/silicon dioxide-polypyrrole composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, adding a graphene/silicon dioxide composite material into water for carrying out ultrasonic treatment to obtain a graphene/silicon dioxide solution; secondly, transferring the graphene/silicon dioxide solution to an ice-bath condition, and then adding pyrrole for stirring to obtain a mixed solution; thirdly, adding an ammonium persulfate solution into the mixed solution obtained in the second step, and stirring under the ice-bath condition to obtain a black precipitate; fourthly, carrying out suction filtration, washing, drying, grinding and sieving on the black precipitate obtained in the third step, thus obtaining the graphene/silicon dioxide-polypyrrole composite material. The graphene/silicon dioxide-polypyrrole composite material disclosed by the invention can be used as an adsorbent in the field of water pollution control, especially for removing hexavalent chromium in the wastewater; in addition, the graphene/silicon dioxide-polypyrrole composite material has the advantages of simple preparation method, high adsorption capacity and capability of reducing the hexavalent chromium into trivalent chromium.
Owner:SOUTH CHINA UNIV OF TECH

Preparation method of fungal inoculant for improving soil heavy metal pollution

The invention belongs to the technical field of microbial inoculants, and especially relates to a preparation method of a fungal inoculant for improving soil heavy metal pollution. The preparation method of the fungal inoculant for improving soil heavy metal pollution comprises the following steps: 1, activating bacterial fungal seeds; 2, cutting mycelia to form small blocks; 3, transferring the small mycelia blocks into a corresponding liquid medium, and carrying out shaking table oscillation dark culture to obtain a seed liquid of all the fungi; 4, uniformly mixing inoculant carriers according to a certain weight ratio, crushing and sieving the mixed inoculant carriers to obtain powder, and carry out high temperature sterilization to obtain an inoculant carrier mixture; 5, adding the inoculant carrier mixture and sterile water into a fermentation tank in order to obtain a mixed medium; , inoculating the mixed medium with the seed liquid of all the fungi, and carrying out dark culture to obtain a fermentation fungus liquid; and 7, filtering the fermentation fungus liquid, drying the filtered liquid, crushing the dried liquid, and packaging the crushed dried liquid to obtain the fungal inoculant. The preparation method of the fungal inoculant for improving soil heavy metal pollution has the advantages of scientific property and low cost, and the prepared fungal inoculant has a substantial fertilizer effect, can effectively avoid heavy metal invasion of plant roots in soil, and improves the quality of the soil.
Owner:周宇

Treatment method for detoxifying and recycling chromium slag

The invention relates to a treatment method for detoxifying chromium-containing (VI) waste slag and recycling chromium (VI). The treatment method for detoxifying and recycling the chromium slag is characterized by comprising the following steps of: 1) sampling and analyzing content, acidity and particle diameter of main components in the chromium-containing waste slag; 2) establishing 3 to 6 leaching tanks; 3) piling the chromium-containing waste slag with the particle diameter of less than or equal to 20 meshes in the leaching tanks; 4) preparing 0.01 to 1 weight percent dilute acid; 5) spraying the dilute acid to the chromium-containing waste slag in the No. 1 leaching tank through a spray pipe, spraying the leachate in the No. 1 leaching tank to the No. 2 leaching tank, spraying the leachate in the No. 2 leaching tank to the No. 3 leaching tank, and so on, collecting the leachate in the last leaching tank, and entering the next procedure; and 6), regulating the pH of the collected leachate to 1.5-2 by using 10 weight percent dilute sulfuric acid, filtering, performing countercurrent multistage extraction-back extraction concentration, and thus obtaining 20 to 30 weight percent chromium-containing concentrate. The method is low in cost and environment-friendly, and can be used for recovering chromium.
Owner:武汉巍川环保科技有限责任公司

Method for calcium-free calcination production of sodium chromate and chromium-containing cast iron as co-product

InactiveCN103224253AAvoid loopsEffective control of side effectsChromates/bichromatesFiltrationMixed materials
The invention discloses a method for calcium-free calcination production of sodium chromate and chromium-containing cast iron as a co-product. The method comprises the following steps of 1, first-stage calcination by mixing chromite and soda ash according to a certain ratio to obtain a first-stage mixed material, wherein a soda ash use amount is 35-60% of the theoretical alkali use amount, putting the first-stage mixed material into a rotary kiln, carrying out oxidizing calcination, and carrying out impregnation and filtration of the calcined clinker to obtain a first-stage sodium chromate alkali solution and filter residues, and 2, treating the filter residues, and carrying out second-stage calcination and third-stage calcination of the filter residues by the step 1 to obtain second-stage calcination filter residues, third-stage calcination filter residues, a second-stage calcination sodium chromate alkali solution and a third-stage calcination sodium chromate alkali solution, wherein the third-stage calcination filter residues can be used for co-production of chromium-containing cast iron. The method does not adopt any auxiliary materials in calcination, and effectively avoids ring forming of the rotary furnace. The calcination residues obtained by the method does not contain hexavalent chromium compounds and thus chromium residue harmlessness and recycling are realized. Through co-production of high-carbon chromium iron, a chromium comprehensive use ratio is improved by more than 95%. Through smelting, produced electroslag does not contain hexavalent chromium so that thorough detoxification of chromium residues is realized.
Owner:INNER MONGOLIA CHROMIUM

Ceramsite preparation method using waste incineration fly ash and ceramsite prepared by method

The invention discloses a preparation method of ceramsite by utilizing waste incineration fly ash and the ceramsite prepared by the preparation method. According to the invention, the waste incineration fly ash is used as a raw material, limestone and a high-silicon substance are added, and the generation amount of a liquid phase in a roasting process is controlled by regulating and controlling the mass ratio of the main components as follows: CaO / SiO2=0.2-0.35, and (SiO2+Al2O3) / (CaO+Fe2O3+MgO)=5-8. Therefore, the cylinder compressive strength of the ceramsite is improved, and the roasting temperature is reduced. The waste incineration fly ash, the limestone, the high-silicon substance and water are uniformly mixed according to the mass ratio, pelletizing is conducted, drying is conducted, and roasting is conducted at the temperature of 800-1200 DEG C for 5-30 minutes to obtain the ceramsite with excellent performance. The method has the advantages of being simple in process, low in production cost, high in resource utilization rate, environmentally friendly and the like, thorough detoxification and efficient resource utilization of the waste incineration fly ash can be synchronously achieved, raw materials can be provided for the ceramsite industry, and dependence on natural raw materials is reduced.
Owner:ZHEJIANG GONGSHANG UNIVERSITY

Water activation treatment apparatus, water activation treatment method and water activation treatment system for breeding

The invention discloses a water activation treatment apparatus for breeding. The water activation treatment apparatus comprises an electromagnetic pulse generator and an electromagnetic transducer, wherein the electromagnetic pulse generator is used for generating an analog frequency conversion direct current pulse signal and transmitting the analog frequency conversion direct current pulse signal to the electromagnetic transducer, and the electromagnetic transducer is used for generating a frequency conversion direct current pulse electromagnetic field according to the frequency change of the analog frequency conversion direct current pulse signal so as to carry out an activation treatment on the breeding water flowing through the electromagnetic transducer through the frequency conversion direct current pulse electromagnetic field. The invention further provides a water activation treatment method and a water activation treatment system for breeding. With the technical scheme of the present invention, the pollution-free activation treatment on the breeding water is achieved, the quality of the breeding water is improved, the soil odor inside the bred living organism is removed, and the biological benefits and the ecological benefits favorable to the aquiculture are produced.
Owner:谢崇泽

Method for detoxifying by antibiotic mushroom residues

PendingCN109013641AAchieve detoxificationChemical potency reduced to zeroSolid waste disposalResource utilizationAntibiotic Y
The invention belongs to the field of biomass waste treatment and discloses a method for detoxifying by antibiotic mushroom residues. The method comprises the following steps of 1) slurrying treatment, 2) uniform stirring, 3) hydro-thermal treatment, 4) flash evaporation treatment and 5) inspection. In the step 1), the to-be-treated antibiotic mushroom residues are mixed with water; in the step 2), the concentration of mixed materials is 5-10%; in the step 3), saturated vapor with the temperature of 200-230 DEG C and the pressure of 1.6-2.8 MPa is introduced into the materials for slurrying treatment, so that the temperature of the materials rises to 160-200 DEG C, and the standing time is 30-120 minutes; in the step 4), the materials for water treatment are subjected to pressure relief, so that the temperature of the materials is reduced to 90-100 DEG C; and in the step 5), the materials for flash processing is subjected to chemical valence detection. According to the method, the chemical valence of the antibiotic residues can be reduced to zero, so that the detoxification of the antibiotic mushroom residueko, is realized, and the detoxification of the antibiotic mushroom residuesprovides a basis for the reduction and the resource utilization of the antibiotic bacterium residues.
Owner:TSINGHUA UNIV

Activated carbon/zirconium-manganese oxide composite material, method for preparing same and application of activated carbon/zirconium-manganese oxide composite material

The invention discloses an activated carbon/zirconium-manganese oxide composite material, a method for preparing the same and application of the activated carbon/zirconium-manganese oxide composite material. The method includes adding activated carbon into water and alcohol mixed liquid and carrying out ultrasonic treatment to obtain modified activated carbon solution; adding zirconium oxychlorideand manganese sulfate solid into the modified activated carbon solution under stirring conditions to obtain mixed solution; adding sodium hydroxide solution into the mixed solution and continuing tostir the sodium hydroxide solution and the mixed solution to obtain gray black mixed solution; adding hydrogen peroxide solution into the gray black mixed solution, continuing to stir the hydrogen peroxide solution and the gray black mixed solution at the normal temperature, and further carrying out ultrasonic treatment; filling reaction kettles with mixed solution, carrying out high-temperature reaction and then carrying out centrifuging, washing, drying, grinding and sieving to obtain the activated carbon/zirconium-manganese oxide composite material. The activated carbon/zirconium-manganeseoxide composite material, the method and the application have the advantages that the activated carbon/zirconium-manganese oxide composite material can be used as an adsorbent to be used in the fieldof water pollution control and particularly can be used for removing arsenic in wastewater, the method is simple, the activated carbon/zirconium-manganese oxide composite material is high in adsorptive capacity, and trivalent arsenic can be oxidized to obtain pentavalent arsenic by the activated carbon/zirconium-manganese oxide composite material.
Owner:SOUTH CHINA UNIV OF TECH
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