39results about How to "High adsorption removal rate" patented technology

The invention provides a method for preparing a mesoporous silicon adsorption material with high specific surface area, and relates to a method for preparing an adsorption material. The method solves the problems of poor adsorptivity, low stability and high price existing in the prior adsorption material. The preparation method comprises: 1, dropwise adding a solution of sodium silicate to an acidified solution of cetylpyridinium chloride, and magnetically stirring the mixed solution to prepare a precipitate; and 2, washing, drying and calcining the precipitate to obtain the mesoporous silicon adsorption material with high specific surface area. In the method, the mesoporous silicon material is orderly synthesized under the acidic condition. The product obtained by the method has the advantages of good adsorptivity, high stability, large specific surface area, low price of raw materials, simple process and simple equipment.

The invention relates to a red mud modification method, a modified product and its application in absorbing brilliant blue dye, and the red mud modification method, the steps of which include pretreatment and LDO synthesis. The beneficial effects of the present invention are: by reusing the red mud, an LDO adsorbent with a larger specific surface area and capable of accommodating a large amount of anionic dyes is prepared, the preparation process requires less additional materials, the process is simple, and the success rate is high. And LDO has a high adsorption and removal rate for simulated wastewater. For 50mg / L brilliant blue dye simulated wastewater, the removal rate of 0.1gLDO can reach more than 98%, which is far higher than the highest removal rate of red mud38 %, 22% of roasted red mud and 89% of LDH; especially for 400mg / L simulated wastewater, the highest adsorption capacity of LDO can reach 170mg / g, which has a high use value.

The invention discloses a composite adsorbing material prepared by loading rice husk powder on a carbon nanometer tube and belongs to the field of water purification. The invention also discloses a method for removing copper ions in water by utilizing the carbon nanometer tube with loaded rice husk powder, namely adsorbing the carbon nanometer tube with the loaded rice husk powder at any pH value for removing the copper ions in the water. An adsorbing method is adopted for removing the copper ions in the water, but the service life and recycling are obviously superior to that of conventional adsorbing materials. In addition, the method is simple to operate, and the composite adsorbing material has the advantages of easily available materials, low cost and high adsorbing quantity. The composite adsorbing material has high efficiency for treating natural water with the ionic concentration of 1-100mg / g. In such a way, the composite adsorbing material is used for removing the copper ions in the natural water and has good economic and environment benefits.

The invention belongs to the technical field of water treatment, and relates to MgO-loaded activated carbon as well as a preparation method and application thereof. The preparation method of the MgO-loaded activated carbon comprises the following steps: (a) impregnating activated carbon with the water content of less than or equal to 1% in a strong oxidant solution, carrying out solid-liquid separation on an obtained impregnated product, and washing and drying an obtained solid product to obtain pre-oxidized activated carbon; and (b) uniformly mixing the pre-oxidized activated carbon and a magnesium salt solution, dropwise adding a polyethylene glycol solution into the obtained mixture, carrying out vigorous stirring reaction at room temperature of 50 DEG C, carrying out solid-liquid separation on the obtained reaction product, drying the obtained solid product, and calcining at high temperature under the protection of inert gas to obtain the MgO-loaded activated carbon. The MgO-loaded activated carbon obtained by the method provided by the invention can more quickly and effectively adsorb boron ions in seawater and / or boron industrial sewage so as to obtain desalinated water with boron content meeting the standard, and meanwhile, the environmental problem is greatly solved.

The invention provides a high-efficiency high-temperature activated carbon adsorbent. Raw materials of the adsorbent comprise activated carbon and lipase liquid, wherein the mass ratio of the activated carbon to the lipase liquid is 1:(10-20); and the lipase liquid is lipase liquid secreted during mixed fermentation culture of pseudomonas putida, pseudomonas fluorescens and denitrifying bacteria.According to the adsorbent disclosed by the invention, the adopted lipase liquid is the lipase liquid secreted by mixed fermentation of the pseudomonas putida, pseudomonas fluorescens and denitrifyingbacteria on a culture medium added with industrial wastewater. The lipase liquid can adapt to an environment of the industrial wastewater in the culture medium, is applicable to high-temperature conditions, can still maintain extremely high activity under the high-temperature conditions, and has stability. The lipase liquid has excellent adsorption effects on heavy metal ions and organic matters.The activated carbon adsorbent prepared by performing synergistic matching on the lipase liquid with the characteristics and the activated carbon has excellent high temperature resistance.

A method, device and application for preparing modified activated carbon by two-stage reduction pyrolysis of organic solid waste. The system includes a two-stage pyrolysis device, a gas supply system, a high-temperature gas purification device, a cooling device, a gas storage device, and an oil storage device. Organic solid waste is pyrolyzed in an atmosphere of inert gas and reducing gas to obtain pyrolysis gas, pyrolysis oil and modified pyrolysis coke. The specific surface area of ​​the modified thermal coke is significantly increased, with high activity and strong adsorption. Activated carbon black is obtained after catalytic reforming of upper-stage pyrolysis volatiles by modified thermal coke, which provides an excellent precursor for the preparation of activated carbon. Activated carbon black is obtained through acid-base activation, carbonization and other processes to obtain high-quality modified activated carbon. The modified activated carbon prepared by the invention has a high rate of adsorption and removal of heavy metal pollutants such as nickel and cadmium in water. The invention not only solves the pollution problem of organic solid waste, but also provides a way for resource utilization of organic solid waste.

The invention relates to a preparation method of a pig manure biogas residue adsorbent, a pig manure biogas residue adsorbent and a method for rapidly removing doxycycline in water bodies, belonging to the technical field of environmental treatment. The preparation method of the present invention comprises mixing pig manure biogas residue and potassium permanganate aqueous solution, ultrasonic treatment, to obtain biomass-KMnO 4 mixture, dried to obtain dried biomass‑KMnO 4 mixture; the dried biomass-KMnO 4 The mixture is fired to obtain the pig manure and biogas residue adsorbent loaded with potassium permanganate. The method of the invention is efficient, fast, economical and environment-friendly, and the purpose of efficiently, rapidly, economically and environment-friendly removing the doxycycline in the water body is achieved by loading biochar with potassium permanganate.

The invention discloses a preparation method of a pulverized fuel ash / oxidized grapheme composite adsorbing material, and belongs to the technical field of environmental protection materials. The preparation method comprises the following special steps: adding a chitosan solution with the mass concentration being 1-5% in pulverized fuel ash according to the ratio of 1 g of pulverized fuel ash to 1 ml of chitosan solution for impregnating for 2-3 h, then drying for 2-3 h at 50-80 DEG C, next adding an oxidized grapheme solution according to the ratio of 1 g of pulverized fuel ash to 10-20 ml of oxidized grapheme with the concentration being 2-5 g / L for impregnating for 8-12 h, stirring for 2-3 h at the same time, adding glutaraldehyde according to the ratio of 1 g of pulverized fuel ash to 0.5-2 ml of glutaraldehyde for crosslinking for 3 h at 50-80 DEG C in the process of adding water to dilute till the solid concentration is 40 g / L, filtering out a liquid phase and washing with absolute ethyl alcohol to be neutral, and performing vacuum drying for 5-6 h at 60 DEG C to obtain the pulverized fuel ash / oxidized grapheme composite adsorbing material. The pulverized fuel ash / oxidized grapheme composite adsorbing material, prepared through the preparation method, overcomes the defect that oxidized grapheme is difficult to separate, and can adsorb anionic-cationic dyes and various pollutants synchronously.

The invention provides a magnetic microsphere capable of adsorbing diclofenac sodium. The magnetic microsphere is prepared by the following steps: preparing nano Fe3O4 by a co-precipitation method, preparing a SiO2 coated magnetic nano particle Fe3O4@SiO2, preparing a chitosan compounded Fe3O4@SiO2 magnetic material, and preparing an ethylene diamine modified magnetic material. According to the preparation method, chitosan and magnetic particles are combined, then the microsphere is modified by ethylene diamine; the magnetic microsphere has more amino groups, the effect of adsorbing and removing diclofenac sodium in water is improved, moreover, the chitosan microsphere has a good magnetic responding performance, so the microsphere can be conveniently separated and recovered, and the magnetic microsphere is a green and sustainable absorbent.

The present invention relates to the treating process of effluent containing toluidine. In the conditions of 0-40 deg.c temperature and 0.5-8 BV / hr flow rate, effluent containing toluidine is made to pass through treater filled with double function resin of R-NH2, where R is divinyl benzene cross-linked styrene copolymer, and the resin has specific surface area not smaller than 700 sq m / g and exchange capacity not smaller than 0.5 mmol / g. The adsorption saturated double function resin is desorbed with dilute hydrochloric acid solution to regenerate, and the desorbed high concentration toluidine solution is treated through alkali regulation, rectification and other steps to recover toluidine product. The present invention has toluidine recovering rate higher than 80 % and recovered toluidine purity higher than 99 %. The present invention realizes the recovery of toluidine in effluent and the treating process is simple, efficient and economic.

The invention provides a sewage treatment system and method for strengthening fast transfer of organic matters. The system comprises a sludge pretreatment basin, an adsorption-condensation basin, a sedimentation tank and a regeneration tank. The method includes: putting sludge in the sludge pretreatment basin, generating high shear force through fast stirring, and exposing close bond type extracellular polymeric substances with higher aggregation performance in the inner layer of sludge floc; feeding the pretreated sludge into the adsorption-condensation basin, and fully mixing the sludge with sewage under slow agitation to enable the sludge to quickly adsorb organic matters in the sewage and aggregate together again to form sludge floc; feeding mixed liquid containing the sludge floc into the sedimentation tank to stay, enabling supernatant to flow out via a water outlet, feeding part of settled sludge into the regeneration tank via a sludge pump, and discharging the excess sludge to serve as recyclable materials; subjecting the sludge in the regeneration tank to aerobiotic regeneration under the aeration condition, and feeding the sludge into the sludge pretreatment basin through a sludge reflux pump. Compared with the traditional adsorption-regeneration process, the system and method has the advantages that pollutant adsorption and removal rate of the process can be increased by 20-30%, process energy consumption can be lowered by 30-60%, and organic content of the excess sludge is increased by 10-20%.