37results about How to "Strong removal rate" patented technology

The invention belongs to the field of water treatment material preparation and in particular relates to a preparation method and application of a silane coupling agent modified magnetic halloysite material. The method is characterized by taking halloysite as a template and adhering Fe3O4 particles to the surface of a halloysite nanotube by an in-situ synthesis method; mixing a silane coupling agent with halloysite/Fe3O4 and grafting the silane coupling agent onto the surface of halloysite through reaction. The method has the beneficial effects that the raw materials are cheap and accessible; a functional group on the surface of the silane coupling agent modified magnetic halloysite material obtained by the method is bonded with a matrix via chemical bonds, so the material has strong bonding force; the material has high thermal stability, is convenient and fast to separate and recover, can be recycled multiple times, can serve as an adsorbent for eliminating heavy metal pollution of printing and dyeing wastewater and enables that the treated printing and dyeing wastewater can reach the national wastewater discharge standards.

The invention relates to a preparation method of a honeycomb ceramic net through Lu and N co-doped TiO2 photocatalysis. The honeycomb ceramic net is regarded as a first carrier, and activity AL2O3 coating with specific surface area of 300 to 400m2/g and doping with lanthanum, cerium and iron element is loaded on the first carrier and regarded as a second carrier; the mass ratio of AL2O3 to La to Ce to Fe is (100 to 110) to (90 to 115) to (50 to 70) to (5 to 15); the TiO2 photocatalyst films of rare earth element Lu and non-metallic element N are loaded on the second carrier; the mass ratio of Lu to N to TiO2 in the TiO2 photocatalyst film is (0.01 to 0.16) to (0.40 to 1.88) to (97.94 to 99.54). The removal rate of the honeycomb ceramic net prepared through photocatalysis to formaldehyde and toluene in the air is 98.7% and 92.2% respectively, and the removal rate to formaldehyde and toluene in the air is improved by 2.0 times and 1.9 time respectively compared with the application of the TiO2 photocatalyst film only.

The invention discloses an application of straw biomass charcoal in processing electroplating wastewater. The straw biomass charcoal is prepared by anaerobic pyrolysis of peanut straw, soybean straw and rape straw obtained after harvesting at the temperature of 400-500 DEG C, wherein, the added proportion of the straw biomass charcoal is 12-32 g in per liter of electroplating wastewater. The application of the straw biomass charcoal in simultaneously removing acid and heavy metal copper from the electroplating wastewater comprises the following steps: mixing the straw biomass charcoal sieved with 60-mesh sieve with acidic waste water in a reaction tank, continuously stirring for 2 h, standing for 8 h, stirring again for 0.5 h, standing for 1.5 h, and then separating biomass charcoal from the mixed liquor through a sand filtration device, discharging the clear liquid, drying the biomass charcoal obtained after processing waste water, and carrying out incineration. The method has the advantages of low price, high efficiency, and no generation of secondary pollution.

The invention discloses VOCs treatment process and equipment using heterogeneous catalytic oxidation. The VOCs treatment process is characterized in that O3, H2O2, UV and hydraulic cavitation effects are integrated to allow the oxidant and the oxidation manner to have a synergic effect so as to generate a large amount of hydroxyl radicals to achieve the oxidation effect. The VOCs treatment process and equipment has the advantages that the O3/H2O2/UV/hydraulic cavitation technologies are integrated to generate a large amount of hydroxyl radicals, and the oxidation effect is increased greatly; the equipment is operated under normal temperature and normal pressure and is simple and safe to operate and capable of synchronously desulfurizing, removing heavy metals and removing waste gas components such as dioxin.

The invention relates to treatment methods for electroplating wastewater and particularly relates to a method for treating electroplating chromium-containing wastewater. The method comprises the following steps: (1) adding a reducer into the chromium-containing wastewater; (2) carrying out continuous stirring, and adding lime or sodium hydroxide into the mixture; and (3) then, carrying out standing precipitation for 10 to 30 minutes, carrying out filtration, adjusting the pH of the filtrate to be neutral, and then, carrying out draining, wherein the reducer contains the ingredients in percentage by weight: 20% to 80% of sodium thiosulfate, 2% to 20% of ascorbic acid, 2% to 20% of oxalic acid, 2% to 10% of glucose, 2% to 20% of starch and 10% to 60% of ferrous sulfate. By adopting the method disclosed by the invention, sexavalent chromium is reduced to trivalent chromium through electron acceptance, a linkage reduction process is formed in the participation of ferric ions, and the sexavalent chromium is effectively reduced in a weak acid medium, so that energy is saved, the processing steps are simple, and the popularization prospect is good.

The invention relates to a dedusting and deep purification apparatus with high efficiency and low energy consumption for flue gas in a metallurgical slag treatment process. The apparatus comprises a tower for spraying, sprinkling and washing and a downstream type gas-liquid tower for deep purification, dehydration and demisting with foam suspension and pneumatic swirling flow; an outlet at the upper end of the tower for spraying, sprinkling and washing and an inlet at the upper end of the downstream type gas-liquid tower for deep purification, dehydration and demisting with foam suspension and pneumatic swirling flow are connected by a connection flue; a sidewall at the lower end of the tower for spraying, sprinkling and washing is provided with a flue gas inlet pipeline; a sidewall of the downstream type gas-liquid tower for deep purification, dehydration and demisting with foam suspension and pneumatic swirling flow is provided with a flue gas outlet pipeline; the tower for spraying, sprinkling and washing employs a wet type multilayer gas-liquid countercurrent contact mode, and the downstream type gas-liquid tower for deep purification, dehydration and demisting with foam suspension and pneumatic swirling flow employs a gas-liquid current contact mode. The dedusting and deep purification apparatus with high efficiency and low energy consumption for flue gas in the metallurgical slag treatment process is adapted to characteristics of high temperature, high moisture and high viscosity flue gas, and realizes ultra-low flue dust emission concentration in a low energy consumption condition, in order to satisfy more strict environmental protection emission requirements of pollution treatment.

The invention relates to a heavy greasy dirt mechanical part cleaning agent and a preparation method thereof, belonging to the technical field of industrial cleaning agents. The heavy greasy dirt mechanical part cleaning agent comprises the following components in parts by weight: 2-8 parts of castor oil, 5-10 parts of glycerin monostearate, 10-16 parts of polyacrylamide, 10-20 parts of nano silica powder, 5-10 parts of glycerin, 8-16 parts of polydimethylsiloxane, 5-10 parts of potassium hydrogen tartrate, 10-16 parts of sodium alginate, 20-38 parts of ethylene glycol butyl ether and 20-28 parts of ethanol. The cleaning agent disclosed by the invention has high removal rate on oil dirt and impurities deposited on mechanical equipment; the cleaning agent disclosed by the invention is stable in properties, and secondary environmental pollution is avoided; and moreover, the preparation method is simple, feasible and convenient to implement.

The invention discloses a heavy metal sewage treatment method based on magnetic ferroferric oxide nano-particles, and belongs to the technical field of sewage treatment. The method comprises the specific steps that dibutyl ammonium dithiophosphate is added into heavy metal sewage, and standing is performed after stirring is performed; then, after standing is performed, a clear solution is filtered, zeolite is added, microwave oscillation is performed under the room temperature, and secondary standing is performed; glucose, lecithin, sodium oleate, kieselguhr and absolute ethyl alcohol are mixed and oscillated to be uniform; then, after second-time standing is performed, the clear solution is added into the mixed solution, a fluid medium and magnetotactic bacteria are added and oscillated and mixed to be uniform; the oscillated mixed solution is centrifuged and separated, a supernatant is sampled to be filtered, and finally the adsorption process is completed. The method is simple in treatment process, can treat sewage with the low metal ion concentration, and is not high in operation cost and raw material cost, good in heavy metal ion adsorption effect and high in selectivity, andthe removal rate for Cu2+, Pb2+ and Cd2+ can reach up to 99%.

The invention discloses a sewage treatment system using a permeable membrane technology. The system comprises a grid tank, a sewage adjusting tank, a Fenton reaction tank, an aeration biological filter tank device, a membrane bioreactor and a reverse osmosis membrane tank sequentially connected through a pipeline, wherein the sewage adjusting tank comprises a water collection tank; a water-in pipe, a coagulant pipe and a sewage pumping pipe are arranged on the water collection tank; a coagulative precipitation tank is arranged in the water collection tank, and permeable walls are placed on three sides; a mesh wall is arranged in the coagulative precipitation tank; the aeration biological filter tank device comprises a filter tank body and a back flushing tank; a gas-out pipe is arranged at the top end of the back flushing tank, and the side is connected with a gas-in pipe; a water level inductor is arranged on the inner wall of the back flushing tank; an upper-layer filter body and a lower-layer filter body are arranged in the filter tank body; a gas-out disc is arranged between the filter bodies; a filter layer impeller is arranged in the filter body; the lower end of the filter body is connected with a backwashing impeller; and a hair brush is arranged on the backwashing impeller. The system disclosed by the invention is mainly used for performing thorough harmless purifying treatment on the urban domestic waste and sewage and has the advantages of good purifying effect, high efficiency, stable and reliable operation, long service life and convenience in maintenance.