95 results about "Phenol degradation" patented technology

The invention relates to Rhodococcus ruber and application of Rhodococcus ruber in degradation of phenol pollutants. The Rhodococcus ruber is designated as Rhodococcus ruber SD3, which is preserved in a preservation unit appointed by SIPO (State Intellectual Property Office), wherein the preservation unit is a China Center for Type Culture Collection, the preservation date is February 26, 2012, the accession number is CCTCC NO: M 2012035, and the Latin name is Rhodococcus ruber SD3. The Rhodococcus ruber has the following technical effect: after Rhodococcus ruber SD3 in an inorganic salt medium of phenol (phenol concentration is 1.0g / L) is subjected to shaking table vibration culture at 35 DEG C and 200r / min for 72h, the phenol degradation rate is 99.73%. The Rhodococcus ruber SD3 can also degrade substances such as isooctane, cyclohexane, benzene, n-heptane, methylbenzene, acetonitrile, chlorobenzene, naphthalene, n-hexane, and 1-naphthol.

The invention relates to a method for preparing a Mn-Ce / Al2O3 catalyst and catalyzing ozonized organic wastewater difficult to degrade.The method for preparing the Mn-Ce / Al2O3 catalyst and catalyzing ozonized organic wastewater difficult to degrade is high in efficiency, utilizes general aluminum oxide and composite metal oxides Mn and Ce playing a synergistic effect to support a carrier, the two added metals strengthen the supporting effect and increase load evenness, the catalytic activity of active components is fully played, and the method is remarkably improved in ozonization catalyzing and phenol degradation effect compared with a non-supported method and other methods.

The invention relates to a preparation method for mesoporous hollow spherical TiO2 having high visible light catalysis performance. The preparation method is characterized in that carbon microspheres prepared by adopting glucose as a raw material under high temperature and high pressure hydrothermal conditions are adopted as a template agent, titanium tetrachloride is adopted as a titanium source, urea is adopted as a nitrogen source, an acid catalyzed hydrolysis method is adopted to prepare a spherical TiO2 precursor, the pH value is adjusted with ammonia water, centrifugal separation is performed to obtain a white solid product, a heat treatment is performed on the obtained product at a high temperature in a tube type resistance furnace, and the carbon microsphere template agent is removed to obtain the hollow spherical TiO2 having the mesoporous structure, wherein the obtained hollow spherical TiO2 has high phenol degradation performance under visible light. According to the present invention, the main characteristics of the operation process comprise that the carbon microspheres prepared from the glucose are adopted as the template agent, the titanium tetrachloride is subjected to acid catalyzed hydrolysis and then is coated on the surface of the carbon microspheres, and the high temperature calcination is performed to form the spherical TiO2 with characteristics of hollow structure, rich mesopore, and visible light catalysis activity, wherein the phenol degradation rate of the mesoporous hollow spherical TiO2 achieves 80-90% after light irradiation for 3 h when the calcination temperature is 700 DEG C.

The invention belongs to the technical field of wastewater treatment and discloses a device and method for degrading phenol and ammonia nitrogen simultaneously by virtue of a microbial fuel cell. The method comprises the following steps: by building a double-chamber microbial fuel cell system, inoculating domesticated electricity-producing mixed bacterial liquid and denitrifying bacteria to an anode chamber, adding sodium acetate as an electron donor, taking mixed liquid of a phosphate buffer solution of 0.1mol / L with pH value of 7.0 and culture liquid as nutritional substances, and meanwhile, providing a relatively strict anaerobic environment; adding phenol and ammonia nitrogen-containing wastewater and mixed sludge taking the nitrifying bacteria domesticated through ammonia nitrogen and phenol, and phenol degradation bacteria as main components into a cathode chamber, filling air through an aeration device, and connecting a closed circuit switch with an external circuit to start the microbial fuel cell so as to degrade ammonia nitrogen and phenol in the cathode chamber simultaneously. The device and the method are used for removing phenol and ammonia nitrogen in the wastewater, and have good economic and environment-friendly benefits.

The invention discloses a preparation method and application of a high-stability ordered mesoporous carbon loaded Fenton catalyst. The catalyst comprises a carrier and alpha-FeOOH growing on the surface of the carrier, wherein the carrier is ordered mesoporous carbon having undergone wet oxidation treatment. The preparation method comprises the following steps: subjecting ordered mesoporous carbon to wet oxidation treatment; then carrying out washing and drying, and soaking the ordered mesoporous carbon in a ferric nitrate solution; and subjecting a material obtained in the previous step to washing and drying and then to hydrothermal treatment in aqueous alkali so as to obtain the ordered mesoporous carbon supported Fenton catalyst. The catalyst prepared in the invention has good hydrophilicity and can be uniformly dispersed in water; aciculiform alpha-FeOOH grows on the surface of ordered mesoporous carbon, and the loading amount of ordered mesoporous carbon is adjustable; when applied to decolouring and phenol degradation of rhodamine B, the Fenton catalyst has good degradation effect in a wide pH scope; and the Fenton catalyst has the advantages of high activity, good stability, a wide pH application scope and small iron loss, and overcomes the problem that conventional homogeneous Fenton reactions produce iron-containing sludge and are restricted by the pH value of sewage.

The invention provides a preparation method and application of cerium-doped titanium dioxide / graphene aerogel and relates to aerogel and application thereof, aiming at solving the problems that titanium dioxide prepared by an existing method has poor catalytic activity under visible light and a powder material is difficult to recycle. The method comprises the following steps: 1, preparing a graphene oxide solution; 2, preparing cerium-doped titanium dioxide; 3, preparing the cerium-doped titanium dioxide / graphene aerogel. The cerium-doped titanium dioxide / graphene aerogel is used for degradingphenol-containing wastewater. The cerium-doped titanium dioxide / graphene aerogel prepared by the invention can be used for degrading phenol under the illumination of the visible light and the maximumlight degradation rate is 90.6 percent after the phenol is degraded for 3h; in a degradation process of surface water organic pollutants, the cerium-doped titanium dioxide / graphene aerogel has a great application potential. The cerium-doped titanium dioxide / graphene aerogel can be obtained.

The invention particularly relates to a microbial composite functional bacterial agent for treating coking wastewater and a preparation method thereof. According to the technical scheme, the microbial composite functional bacterial agent comprises the following microbes: 15-20wt% of n-hexadecane degrading bacteria, 20-30wt% of phenol degrading bacteria, 10-15wt% of pyridine degrading bacteria, 8-12wt% of chinoline degrading bacteria, 5-10wt% of carbazole degrading bacteria, 15-20wt% of naphthalene degrading bacteria and 8-12wt% of anthracene degrading bacteria. The microbial composite functional bacterial agent has the characteristics that: the composite functional bacterial agent prepared from artificially bred functional strains is added to an original biochemical treatment device, thus the removing capability of refractory organic matters in the coking wastewater is greatly improved and the contents of COD (chemical oxygen demand) and NH3-N in the coking biochemical effluent can both reach national first-level emission standard. The microbial composite functional bacterial agent has strong environment adaptability, good cooperativity, and broad application prospects in bioaugmentation of coking wastewater.

The invention discloses a microbial strain which can effectively degrade phenol and relates to alcaligenes faecalis JH1013 CCTCC NO: M 208006 and a method for degrading phenol wastewater by using a fixed alcaligenes faecalis that is produced by alcaligenes faecalis. The method has the following advantages that: 1. the alcaligenes faecalis is easy to culture, the fixing technique is simple, the catalytic degradation effect is good, the high-concentration phenol can be resistance, the phenol degradation capacity is strong, which can high efficiently degrade the phenol wastewater with the concentration of as high as 2000mg. L<-1> and be used repeatedly; 2. hydrotalcite, hydrotalcite-like compounds, nano calcium carbonate, Gamma-Al2O3 or the loading solid base are used as carriers for preparing the fixed alcaligenes faecalis, the elasticity is good, the temperature and pH value resistances are strong, the mechanical strength is high, the degradation performance is stable and the half-time is long; 3. the carriers of the hydrotalcite, the hydrotalcite-like compounds, the nano calcium carbonate and the Gamma-Al2O3 of the fixed cell can be used repeatedly by calcinations; 4. the fixed alcaligenes faecalis is used for degrading the phenol, the degradation process is simple, the conditions are moderate, the environment is friendly, the bacterial cells are difficult to loss, the concentration of the microorganisms in the carriers is high, the degradation speed is fast, the degradation efficiency is high and the secondary pollution is not easy to be caused.

A microbe reduced and noble metal modified TiO2 catalyst for catalytic degradation of phenol has a formula No-La / TiO2, where No is Ag and / or Pd. Its preparing process includes such steps as calcining TiO2, ultrasonic dispersing, adding it into the bottle containing microbe R08 and SH10, dark culture, impregnating in the solution of nitrate or chloride of noble metal, laying aside, washing, putting it in flowing N2, and carrying the nano-particles of noble metal by the í‹anchoríŒ and reducing action of microbes.

The invention relates to Ralstonia pickettii highly resistant to cadmium and an extraction method and application thereof, wherein the strain is highly resistant to cadmium and has ability of degrading phenol. The maximum tolerance of the strain against the heavy metal cadmium in a liquid medium can reach 18mM / L and 16mM / L in a solid medium, showing very strong cadmium resistance. The degradation rate of the strain against phenol of 500mg / L or below is 100% within 60 hours. The degradation rate of the strain against phenol of less than 1,000mg / L in an environment suffering combined pollution of phenol and heavy metal cadmium can reach over 75% within 100 hours, and the Cd2<+> of 1mM / L (112mg / L) is tolerable.

The invention discloses phenol-degradation Diaphorobacter sp. bacterial strain P2 screened and separated from coking wastewater; 16S rDNA sequence similarity analysis shows that the homology of the P2 bacterial strain and a known Diaphorobacter 16S rDNA sequence is 99%; The Diaphorobacter P2 can degrade phenol high up to 1000 mg / L; influence of compound heavy metals on the phenol degrading efficiency of the P2 bacterial strain is: in order, Zn<2+> > Mn<2+> > Pb<2+>, and Pb<2+> has no significant influence on the phenol degrading efficiency of the Diaphorobacter P2 bacterial strain; and the P2 is inoculated in prepared wastewater in which the volume ratios of the coking wastewater to distilled water are respectively 1:2 and 1:1, and phenolic substances can be completely degraded in 4 days. The application of the Diaphorobacter bacterium in phenol removal of the coking wastewater provides materials and theoretical basis for the biological treatment of phenol pollution of coking wastewater and the development of bioremediating inoculants.

The invention provides a preparation method and a use method of a nano catalyst. The preparation method comprises the following steps of: chemically precipitating tervalent cerium ion (Ce<3+>) in the alkaline environment; and calcining at the air atmosphere to obtain a nano ceria sample. Obtained nano ceria shows good catalytic property in phenol degradation with ozonated water, on such a basis, a water treatment method based on nano ceria catalysis ozonization is built. The preparation method of the nano catalyst is simple; the obtained nano catalyst is uniform in structure, large in specific surface area and obvious in effect; a new application field of a rare earth material in ozonization is developed; and the obtained nano catalyst has a wide application prospect in the aspects of water treatment and environment catalysis.

The invention belongs to the technical field of wastewater treatment catalyst preparation and particularly relates to a zeolite Fenton catalyst containing an isolated metal species as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing zeolite with a metal chloride precursor solution to prepare a catalyst precursor; and then preparing the Fenton catalyst containing the isolated metal species with a freeze-drying method. According to the zeolite Fenton catalyst containing the isolated metal species prepared with the method, the tetra-coordinated isolated metal species content reaches up to 8.90%; in a process of degrading phenolic waste water, the catalyst has high phenol degradation catalysis efficiency and hydrogen peroxide utilization efficiency as well as low active species leakage amount; and the catalyst is simple in preparation process, low in device requirement and low in cost, can be produced on a large scale and is applied to an actual wastewater treatment process.

The invention discloses a catalyst for degrading phenol by adsorption-catalytic oxidation synergy and a preparation method and application thereof. Nitrogen-doped graphene aerogel is used for processing phenolic waste water; gel is taken as the catalyst, persulfate is added to carry out catalytic oxidation treatment on phenol aqueous solution for 20-60min, and the degradation rate of phenol is 100%; after the catalyst is subjected to centrifugation, washing and drying, the catalyst can be reused. The preparation method for the catalyst is simple in preparation method and high in catalytic efficiency, only oxidizing agent needs to be added into a catalytic oxidation process, and air does not need to be blasted. In addition, at a normal temperature, the catalytic effect of the catalyst is obvious, the temperature of a system does not need to be improved, and energy consumption can be lowered. Finally, the system carries out catalytic oxidation treatment for 30min, and a phenol degradation rate is 100%.

The invention discloses a method for treating phenolic effluent. The method comprises the steps of complexing ferric trichloride with phenols in the effluent and then conducting phenolic effluent treatment by adopting the method of oxidizing Phenol-Fe complex with H2O2. Compared with the prior art, the method has the advantages that during the treatment, some phenols which are hard to dissolve can be oxidized and degraded after a complexed dissolution, expanding the application range of oxidation degradation. The method and technology adopts simple equipment and is effective and fast in treatment and complete in phenols degradation without secondary pollution, which contributes to achieving the state Grade 1 or Grade 2 industrial effluent discharge standard after a simple treatment.

The invention discloses a method for preparing a stanniferous double-perovskite type phenol photocatalytic degradation catalyst. The catalyst is applied to carrying out a degradation reaction on low-concentration phenol sewage under the condition of simulated sunlight. According to the catalyst, a sol-gel method is used for preparation, and saccharose serves as a complexing agent. The method includes the steps that Sn powder is dissolved into a dilute nitric acid solution in a cold bath first, the obtained light yellow settled solution is then subjected to reacting and complexing with La(NO3)3-6H2O(1 / 8), Fe(NO3)3-9H2O(1 / 8) and polyethylene glycol 2000, and after roasting is conducted for 3 hours in the air atmosphere of 700 DEG C, a pure-phase double-perovskite type La2FeSnO6 photocatalyst sample is obtained. The molar ratio of selected La atoms to Fe atoms to Sn atoms is 2:1:1. The molar ratio of the saccharose to metal cations is 2:1. The method has the advantages that the sol-gel method with the saccharose used as the complexing agent is used for preparation, and the pure-phase double-perovskite type catalyst La2FeSnO6 is synthesized at a low temperature. The preparation method is simple, low in cost and free of pollution. The method has high catalytic activity and good structural stability when being used for low-concentration phenol degradation.

The invention provides a method for treating phenolic waste water. The method comprises the following steps: S1, introducing chlorine dioxide into phenolic waste water and fully mixing chlorine dioxide with phenolic waste water; S2, enabling the phenolic waste water treated in the S1 to flow into a reaction tower filled with an active carbon-loaded nanoscale titanium dioxide catalyst; and S3, introducing oxygen into the reaction tower, and carrying out phenol degradation under irradiation of ultraviolet lights. According to the method for treating phenolic waste water provided by the invention, chlorine dioxide and the active carbon-loaded nanoscale titanium dioxide catalyst are compounded in use to generate a synergistic effect, so that the phenol degradation effect is good. Moreover, during chemical degradation, heating and pressurizing are not needed, the reaction condition is mild, the concentration of chlorine dioxide in reaction is reduced and the treatment safety is further enhanced.

The invention discloses a phenol degrading and regulating protein and a nucleotide sequence for coding the protein. The invention also discloses an acting phenol hydroxylase promoter of the phenol degrading and regulating protein and a functional binding site for the phenol degrading and regulating protein in the sequence of the promoter. The invention constructs a recombinant vector including the gene and a testing expression vector of the phenol hydroxylase promoter, and implants the two vectors into Escherichia coli. As proved by tests, the invention expresses the regulating gene in the Escherichia coli to activate the expression of the phenol hydroxylase promoter, thus acting as a whole-cell biological sensor to detect phenolic compounds including phenol, pyrocatechol, orthocresol, dichlorophen and the like.

The invention provides a phenol-degradation microbial agent, immobilized globules and a preparation method. Microorganisms in the phenol-degradation microbial agent are separated and extracted from surface filter materials of a biological manganese sand filter pool of a waterworks, and after the microorganisms are cultured and screened in a manganese-contained MSVP liquid medium and a manganese-contained MSVP solid medium and are activated in a TBS medium, the phenol-degradation microbial agent is prepared. The invention further provides the preparation method for preparing the phenol-degradation microbial agent into the immobilized globules. According to the preparation method, the gel globules are prepared by using cross-linking polymerization products of silicon dioxide or manganese dioxide and sodium alginate as carriers and embedding the phenol-degradation microbial agent. The phenol-degradation microbial agent can be applied to rapidly degrading phenol at low-temperature oxygen-free and neutral conditions of underground water. The phenol-degradation microbial agent immobilized globules can provide stable degradation environment, are more suitable for toxic environment, and are used for treating phenol pollution of the underground water with higher concentration.

The invention discloses a method for preparing a loaded type Y-type molecular sieve membrane anode material for photoelectric catalytic oxidation, belonging to the technical field of photoelectric catalytic oxidation sewage treatment. The method comprises the following steps: by adopting a Y-type molecular sieve structure guide agent as a crystal seed, performing electrochemical pre-adsorption on the crystal seed to secondarily grow on a conductive support body, so as to prepare a Y-type molecular sieve membrane, and loading nitrogen-doped titanium dioxide on the Y-type molecular sieve membrane by using a sol-gel method. The method is low in cost, simple in equipment, convenient and rapid to operate, high in repeatability in preparing the molecular sieve membrane, high in phenol degradation speed and remarkable in degradation effect.

The invention discloses a halogenated phenol-degrading strain and a microbial agent prepared from the halogenated phenol-degrading strain. The strain is a Gram staining reaction negative strain DCP-2and is Bosea sp. through identification. The strain is preserved in the China Center for Type Culture Collection on December 23, 2019 and has a strain preservation number of CCTCC M20191083. The halogenated phenol-degrading strain DCP-2 can be applied to degradation of 2,4-dichlorophenol (2,4-DCP), o-chlorophenol, p-chlorophenol or m-chlorophenol, and is preferentially applied to degradation of 2,4-DCP in soil. A degradation microbial agent can be used for reducing the residual amount of 2,4-DCP in soil to be 95 percent or more by direct application, and the pollution problem of 2,4-DCP in soil can be solved.

The invention discloses a screening method and application of a phenol degradation strain, and relates to the technical field of microorganisms. Phenol is used as the only carbon source of the strain,the strain is an acinetobacter radioresistens APH1 (Acinetobacter radioresistens APH1), and is preserved in China Center for Type Culture Collection, Wuhan university, China, the preservation numberis CCTCC M 2019462, and the preservation time is 18 June, 2019. The strain provided by the invention has efficient degradation rate and degradation speed on the phenol, can realize biologic repair ofpolluted soil, can bear various antibiotics, and provides a support basis for repairing pollution in actual environment. The strain is extremely high in rate of removing the phenol in water bodies andsoil, has the advantages of being low in cost, free from secondary pollution, capable of saving energy resources and the like, and has great application prospects.

The invention discloses a method for harmless degradation of PCP (pentachlorophenol) by using an ECH (epoxy chloropropane)-SBR (styrene-butadiene rubber) combined process, belonging to the technical field of electrochemical water treatment. The method comprises the steps of firstly efficiently converting PCP into phenol by using a Pd-Cu electrode with high catalytic activity, acclimating activated sludge by taking phenol as the only carbon source at the same time, and finally performing phenol degradation on a dechlorination product by using the acclimated activated sludge so as to realize the harmless removal of PCP. The ECH-SBR combined process realizes 100% efficient completely-harmless degradation of a highly-toxic pollutant, namely, PCP.

The invention belongs to the technical field of catalytic materials, and particularly relates to an iron-sulfur coupled catalyst capable of efficiently degrading high-concentration phenol, and a preparation method and application of the catalyst. The preparation method of the catalyst comprises the following steps: 1) preparing goethite; 2) mixing an iron-source material with deionized water, introducing nitrogen and carrying out stirring until the iron-source material is dissolved; 3) adding the goethite prepared in the step 1), continuously introducing nitrogen, and continuously carrying outstirring; and 4) adding a sulfide solution, continuously introducing nitrogen and continuously carrying out stirring, then carrying out centrifuging to remove the supernatant to obtain a solid, and carrying out vacuum freeze drying on the solid to obtain the iron-sulfur coupled catalyst. The catalyst can improve performance of a Fenton process system for treating organic pollutants and improve degradation efficiency on the organic pollutants. High-efficiency phenol degradation can be realized in a neutral or acidic environment, and cost of phenol treatment can be reduced. The novel high-efficiency Fenton reaction process system provided by the invention has an important application prospect.

The invention discloses a preparation method and application of efficient Fe3O4 / FeAlO4 composite coating Fenton-like catalyst relate to preparation methods and application of Fenton-like catalysts, and aims to solve the problems that the conventional Fenton-like catalyst is difficult to separate and recycle, and poor in mechanical property. The preparation method comprises the following steps: I, carbon steel is polished; II, bright carbon steel is connected with the anode of a power supply, and serves as an anode; a stainless steel electrolysis bath is connected with the cathode of the power supply, and serves as a cathode; III, plasma electrolysis reaction is carried out to obtain the efficient Fe3O4 / FeAlO4 composite coating Fenton-like catalyst. The Fe3O4 / FeAlO4 composite coating Fenton-like catalyst prepared according to the preparation method can achieve a 100 percent phenol degradation efficiency within 60 min. The preparation method provided by the invention can be used for preparing the efficient Fe3O4 / FeAlO4 composite coating Fenton-like catalyst.

The invention relates to a method for degrading phenol in waste water in coal chemical industry, in particular to a method for degrading phenol in waste water in coal chemical industry by utilizing domesticated bacillus subtilis, which is characterized by including the following steps: a. preparing seed; b. domesticating degradation bacteria; c. separating single bacterial colony; d. culturing degradation phenol seed in amplifying mode; e. selecting phenol degradation bacteria; and f. introducing the phenol degradation bacteria selected in the step e. and receiving amplifying culture into thewaste water in the coal chemical industry and culturing the phenol degradation bacteria for 24 to 72h under the temperature of 20-40 DEG C with the stirring speed as 100-130 r / min to degrade phenol in the waste water in the coal chemical industry. Compared with the prior art, the method can completely degrade phenol in waste water produced in coal preparation processes of carbinol, dimethyl etherand olefin, simultaneously has no secondary pollution to the environment and is unique in process.