CN103041856B - Novel adsorption catalyst for nitrogen removal of sewage and preparation method thereof - Google Patents
Novel adsorption catalyst for nitrogen removal of sewage and preparation method thereof Download PDFInfo
- Publication number
- CN103041856B CN103041856B CN201210530793.9A CN201210530793A CN103041856B CN 103041856 B CN103041856 B CN 103041856B CN 201210530793 A CN201210530793 A CN 201210530793A CN 103041856 B CN103041856 B CN 103041856B
- Authority
- CN
- China
- Prior art keywords
- solution
- mixed liquor
- black
- blue
- fecl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses a novel adsorption catalyst for nitrogen removal of sewage and a preparation method thereof. The preparation method comprises the following steps of: firstly, mixing FeC13 solution with tannin solution according to a certain proportion, and regulating pH of the mixed solution to 7.0 by adding NaHCO3; then carrying out centrifuging, distilled water washing and recentrifuging on the neutral mixed solution; and carrying out freeze drying on solid matters obtained by centrifugal separation so as to obtain a novel ferric tannate adsorption catalysis material. The novel adsorption catalyst for the nitrogen removal of the sewage and the preparation method thereof have the advantages of simplicity in operation, economy, applicability and the like; due to a prepared ferric tannate adsorption catalyst, NH4<+>- and NO2<->-N in water can be simultaneously absorbed and converted into N2; and the adsorption catalyst has the advantages of rich pore structures, high stability, good adsorption and nitrogen removal catalyzing effects and wide applicable range and can be widely applied to the nitrogen removal of the sewage.
Description
Technical field
The invention belongs to sewage treatment area, be specifically related to a kind of adsorption catalyst for sewage water denitrification and preparation method thereof.
Background technology
In sewage, containing the nutriments such as ammonia nitrogen, nitrous acid nitrogen, is the one of the main reasons that causes receiving water body eutrophication.Sewage denitrification method comprises physico-chemical process and biochemical process at present.Biological denitrification method is subject to the impact of the conditions such as the C/N of sewage and temperature, and microorganism incubation time is long, denitrification reaction process is slow, and required bioreactor volume is larger, and energy consumption is higher.Physical-chemical process mainly comprises absorption method and catalysis method.Simple absorption method needs the problem of regeneration after existing adsorbent saturated, and simple catalysis method exists high in cost of production problem.Therefore, to have absorption be one of key method solving wastewater efficient Denitrogenation with the adsorption catalyst of catalysis simultaneously in development.
Have at present with Fe, Fe
2+, Fe
3+remove NH
4 +-N, NO
3 --N, NO
2 -the adsoption catalysis method of-N, is catalyst but take the Fe element of these forms, has the converted product of Fe and the problem of the separated difficulty of water outlet.In research, find that tannic acid has polyphenol hydroxyl structure, two adjacent phenolic hydroxyl groups can form stable five-membered ring chelate-ferric tannate (water insoluble) with form and the metal ion of negative oxygen ion.The chemical stability of ferric tannate is good, can adsorb NH simultaneously
4 +-N and NO
2 --N, and catalysis its be converted into N
2, be a kind of adsoption catalysis denitrogenation material with large development potentiality.Therefore, develop a kind of novel ferric tannate adsorption catalyst for sewage water denitrification, efficient processing nitrogenous effluent, control water are polluted and had great importance.
Summary of the invention
The object of this invention is to provide a kind of applicability wide, technique is simple, adsorption catalyst of processing for sewage water denitrification of easy operating and preparation method thereof.
The described adsorption catalyst of processing for sewage water denitrification is ferric tannate;
The preparation method of the described adsorption catalyst for sewage water denitrification comprises following steps:
1) tannic acid and FeCl
3reaction: by tannic acid and FeCl
36H
2o is all formulated as the solution of same concentrations, according to certain volume ratio, while stirring by FeCl
3solution joins in tannic acid solution, fully reacts 10～20min;
Described tannic acid and FeCl
3solution concentration is 0.001～0.02mol/L;
Described tannic acid and FeCl
3volume ratio during solution reaction is 1:40～1:10;
In described reacted mixed liquor, contain black-and-blue floccule;
2) NaHCO
3the preparation of solution: by NaHCO
3solid is dissolved in distilled water, is mixed with the NaHCO that concentration is 0.65mol/L
3solution;
3) NaHCO adjusting reaction mixture pH value: by step 2)
3solution slowly joins step 1 with dropper) middle tannic acid and FeCl
3in the reacted mixed liquor that contains black-and-blue floccule, slowly add while stirring and measure with pH meter the pH value of mixed liquor, when the pH of mixed liquor value reaches 7.0, stop dripping;
4) once centrifugal: by step 3) in the centrifugal 5min of the mixed liquor that contains black-and-blue floccule 3000-4000rpm in centrifuge;
5) washing: by step 4), distilled water washing 3-4 time for black-and-blue sediment, obtains containing black-and-blue sedimentary mixed liquor;
The distillation water yield of adding during described each washing is black-and-blue sedimentary 2-5 times;
6) secondary centrifuging: by step 5) after washing, contain the centrifugal 5min of black-and-blue sedimentary mixed liquor 3000-4000rpm in centrifuge;
7) dry: by step 6) in black-and-blue sediment-40～-50 ℃ of dry 20-24h in vacuum freeze drier of obtaining after centrifugal, drying pressure is 40Pa, can obtain dry ferric tannate sample, dried sample is placed in normal temperature in sealing bag and preserves.
Beneficial effect:
Compared with prior art, its remarkable advantage is in the present invention: (1) denitrogenation adsorption catalyst ferric tannate is by tannic acid and FeCl
3prepared by generation chemical reaction, the Fe with catalytic activity is loaded on tannic acid, and the ferric tannate of formation can adsorb NH simultaneously
4 +-N, NO
2 --N.(2) strength and stability that adsorption catalyst ferric tannate self has can not be discharged into harmful substance in water body adsorbent and forms secondary pollution, and adsorbent advantages of good adsorption effect, in absorption, and can catalyzing N H
4 +-N and NO
2 -n reaction generates nitrogen, therefore can utilize for a long time.(3) NH in waste water
4 +-N, NO
2 -after-N is adsorbed by ferric tannate, both react and generate N
2speed significantly raise.
Adsorption catalyst---the relation of ferric tannate absorption property and addition
Ferric tannate has abundant pore structure, contains a large amount of hydroxyls in its molecular structure, has good absorption property.Under same condition of water quality, the dosage of ferric tannate affects its absorption NH
4 +the power of-N performance.
Get 0.1g, 0.5g, 1.0g ferric tannate is added to respectively in 50ml waste water, NH in water sample
4 +-N concentration is 408mg/L.The tool plug triangular flask that contains aggregate sample is placed in to shaking table, under 35 ℃, 200rpm condition, acts on 180min, every 30min, get water sample one time, with NH in nessler reagent colorimetric method for determining water sample
4 +the variation of-N content.By measuring, found, along with the increase of ferric tannate dosage, ferric tannate is to NH
4 +the equilibrium adsorption capacity of-N obviously reduce, reach the needed time of adsorption equilibrium first shorten afterwards remain unchanged, denitrification percent obviously improves.30.5,11.5,8.7mg/g wherein, when the dosage of ferric tannate is respectively 0.1g, 0.5g, 1.0g, its equilibrium adsorption capacity is respectively:; 90,30,30min reaching the needed time of adsorption equilibrium is respectively:; Denitrification percent while reaching adsorption equilibrium is respectively: 15.9%, 28.4%, 43.2%.
Adsorption catalyst---the relation of ferric tannate absorption property and wastewater temperature
Fe
3+facile hydrolysis, in water with the form (Fe (OH) of multinuclear hydroxyl compound
2+, Fe (OH)
2 +, Fe
3(OH)
2 5+) exist, therefore more easily adsorb NO
2 --N.Under equal adsorbent dosage condition, the temperature of waste water affects ferric tannate to NO
2 -the absorption property of-N.
Get 0.1g ferric tannate and be added to respectively in 50ml waste water, NO in water sample
2 --N concentration is 485mg/L.The tool plug triangular flask (two) that contains aggregate sample is placed in to shaking table, under 33 ℃ and 55 ℃, 200rpm condition, acts on 240min, every 30min, get water sample one time, with NO in aminobenzenesulfonic acid-N-(1-naphthyl)-ethylenediamine colorimetric method for determining water sample
2 -the variation of-N content.By measuring, found, along with the rising of temperature, ferric tannate is to NH
4 +the equilibrium adsorption capacity of-N obviously raise, reach the needed time of adsorption equilibrium obviously shorten, denitrification percent obviously improves.Wherein, when temperature is 33 ℃, 55 ℃, its equilibrium adsorption capacity is respectively: 23.6,61.3mg/g; Reaching the needed time of adsorption equilibrium is respectively: 150,90min; Denitrification percent while reaching adsorption equilibrium is respectively: 15.4%, 46.9%.
The relation of adsorption catalyst---ferric tannate and nitrogen gas generation speed
NH in ferric tannate energy while adsorbed water body
4 +-N and NO
2 --N.The suction-operated of ferric tannate can improve NH
4 +-N and NO
2 -the reaction density of-N, the inorganic nitrogen that the active group itself containing can improve again two kinds of forms reacts to each other and generates the speed of nitrogen.
Get 0.2g ferric tannate and be added in 200ml waste water, and blank experiment is set simultaneously.NH in water sample
4 +-N and NO
2 --N concentration is respectively 494mg/L, 540mg/L.The tool plug triangular flask (two) that contains aggregate sample is placed in to shaking table, under 30 ℃, 200rpm condition, act on 24h, every 3h, get water sample one time, use respectively the NH in nessler reagent colorimetric method and aminobenzenesulfonic acid-N-(1-naphthyl)-ethylenediamine colorimetric method for determining water sample
4 +-N and NO
2 -the variation of-N content.By measuring, found, under equal experiment condition, in ferric tannate system, the generating rate of nitrogen is than high by 93.7% in blank system.
The specific embodiment
Preparation method below by a kind of adsorption catalyst of processing for sewage water denitrification in specific embodiment narration the present invention.Unless stated otherwise, in the present invention, technological means used is method known in those skilled in the art.In addition, embodiment is interpreted as illustrative, but not limits the scope of the invention, and the spirit and scope of the invention are only limited by claims.To those skilled in the art, do not deviating under the prerequisite of essence of the present invention and scope various changes that the material component in these embodiments and consumption are carried out or change and also belong to protection scope of the present invention.
Embodiment 1
1) by tannic acid and FeCl
36H
2o is all formulated as the solution that concentration is 0.001mol/L, while stirring by FeCl
3solution joins in tannic acid solution, tannic acid solution and FeCl
3the volume ratio of solution is 1:40, fully reacts 20min, contains black-and-blue floccule in reacted mixed liquor;
2) by NaHCO
3solid is dissolved in distilled water, is mixed with the NaHCO that concentration is 0.65mol/L
3solution;
3) by step 2) in NaHCO
3solution slowly joins step 1 with dropper) middle tannic acid and FeCl
3in the reacted mixed liquor that contains black-and-blue floccule, slowly add while stirring and measure with pH meter the pH value of mixed liquor, when the pH of mixed liquor value reaches 7.0, stop dripping;
4) by step 3) in the centrifugal 5min of the mixed liquor that contains black-and-blue floccule 4000rpm in centrifuge;
5) by step 4) in the distilled water washing of 2 times of volumes for black-and-blue sediment, wash altogether 3 times, obtain containing black-and-blue sedimentary mixed liquor;
6) by step 5) in washing after the centrifugal 5min of the mixed liquor that contains black-and-blue floccule 4000rpm in centrifuge;
7) by step 6) in black-and-blue sediment-40 ℃ of dry 24h in vacuum freeze drier of obtaining after centrifugal, drying pressure is 40Pa, can obtain dry ferric tannate sample, dried sample is placed in normal temperature in sealing bag and preserves.
Embodiment 2
1) by tannic acid and FeCl
36H
2o is all formulated as the solution that concentration is 0.01mol/L, while stirring by FeCl
3solution joins in tannic acid solution, tannic acid solution and FeCl
3the volume ratio of solution is 1:25, fully reacts 10min, contains black-and-blue floccule in reacted mixed liquor;
2) by NaHCO
3solid is dissolved in distilled water, is mixed with the NaHCO that concentration is 0.65mol/L
3solution;
3) by step 2) in NaHCO
3solution slowly joins step 1 with dropper) middle tannic acid and FeCl
3in the reacted mixed liquor that contains black-and-blue floccule, slowly add while stirring and measure with pH meter the pH value of mixed liquor, when the pH of mixed liquor value reaches 7.0, stop dripping;
4) by step 3) in the centrifugal 5min of the mixed liquor that contains black-and-blue floccule 3000rpm in centrifuge;
5) by step 4) in the distilled water washing of 4 times of volumes for black-and-blue sediment, wash altogether 3 times, obtain containing black-and-blue sedimentary mixed liquor;
6) by step 5) in washing after the centrifugal 5min of the mixed liquor that contains black-and-blue floccule 3000rpm in centrifuge;
7) by step 6) in black-and-blue sediment-45 ℃ of dry 20h in vacuum freeze drier of obtaining after centrifugal, drying pressure is 40Pa, can obtain dry ferric tannate sample, dried sample is placed in normal temperature in sealing bag and preserves.
Embodiment 3
1) by tannic acid and FeCl
36H
2o is all formulated as the solution that concentration is 0.02mol/L, while stirring by FeCl
3solution joins in tannic acid solution, tannic acid solution and FeCl
3the volume ratio of solution is 1:10, fully reacts 10min, contains black-and-blue floccule in reacted mixed liquor;
2) by NaHCO
3solid is dissolved in distilled water, is mixed with the NaHCO that concentration is 0.65mol/L
3solution;
3) by step 2) in NaHCO
3solution slowly joins step 1 with dropper) middle tannic acid and FeCl
3in the reacted mixed liquor that contains black-and-blue floccule, slowly add while stirring and measure with pH meter the pH value of mixed liquor, when the pH of mixed liquor value reaches 7.0, stop dripping;
4) by step 3) in the centrifugal 5min of the mixed liquor that contains black-and-blue floccule 3000rpm in centrifuge;
5) by step 4) in the distilled water washing of 5 times of volumes for black-and-blue sediment, wash altogether 4 times, obtain containing black-and-blue sedimentary mixed liquor;
6) by step 5) in washing after the centrifugal 5min of the mixed liquor that contains black-and-blue floccule 3000rpm in centrifuge;
7) by step 6) in black-and-blue sediment-50 ℃ of dry 20h in vacuum freeze drier of obtaining after centrifugal, drying pressure is 40Pa, can obtain dry ferric tannate sample, dried sample is placed in normal temperature in sealing bag and preserves.
Claims (6)
1. for an adsorption catalyst for sewage water denitrification, it is characterized in that, described adsorption catalyst is ferric tannate, and described adsorption catalyst is prepared by following method:
1) tannic acid and FeCl
3reaction: by tannic acid and FeCl
36H
2o is all formulated as the solution of same concentrations, while stirring by FeCl
3solution joins in tannic acid solution, fully reacts 10～20min; In reacted mixed liquor, contain black-and-blue floccule;
Described tannic acid and FeCl
3solution concentration is 0.001～0.02mol/L;
Described tannic acid and FeCl
3volume ratio during solution reaction is 1:40～1:10;
2) NaHCO
3the preparation of solution: by NaHCO
3solid is dissolved in distilled water, is mixed with the NaHCO that concentration is 0.65mol/L
3solution;
3) NaHCO adjusting reaction mixture pH value: by step 2)
3solution slowly joins step 1 with dropper) middle tannic acid and FeCl
3in the reacted mixed liquor that contains black-and-blue floccule, slowly add while stirring and measure with pH meter the pH value of mixed liquor, when the pH of mixed liquor value reaches 7.0, stop dripping;
4) once centrifugal: by step 3) in the centrifugal 5min of the mixed liquor that contains black-and-blue floccule 3000-4000rpm in centrifuge;
5) washing: by step 4), distilled water washing 3-4 time for black-and-blue sediment, obtains containing black-and-blue sedimentary mixed liquor;
6) secondary centrifuging: by step 5) after washing, contain the centrifugal 5min of black-and-blue sedimentary mixed liquor 3000-4000rpm in centrifuge;
7) dry: by step 6) in black-and-blue sediment-40～-50 ℃ of dry 20-24h in vacuum freeze drier of obtaining after centrifugal, drying pressure is 40Pa, can obtain dry ferric tannate sample, dried sample is placed in normal temperature in sealing bag and preserves.
2. the preparation method of the adsorption catalyst for sewage water denitrification claimed in claim 1, is characterized in that, comprises the following steps:
1) tannic acid and FeCl
3reaction: by tannic acid and FeCl
36H
2o is all formulated as the solution of same concentrations, while stirring by FeCl
3solution joins in tannic acid solution, fully reacts 10～20min; In reacted mixed liquor, contain black-and-blue floccule;
2) NaHCO
3the preparation of solution: by NaHCO
3solid is dissolved in distilled water, is mixed with the NaHCO that concentration is 0.65mol/L
3solution;
3) NaHCO adjusting reaction mixture pH value: by step 2)
3solution slowly joins step 1 with dropper) middle tannic acid and FeCl
3in the reacted mixed liquor that contains black-and-blue floccule, slowly add while stirring and measure with pH meter the pH value of mixed liquor, when the pH of mixed liquor value reaches 7.0, stop dripping;
4) once centrifugal: by step 3) in the centrifugal 5min of the mixed liquor that contains black-and-blue floccule 3000-4000rpm in centrifuge;
5) washing: by step 4), distilled water washing 3-4 time for black-and-blue sediment, obtains containing black-and-blue sedimentary mixed liquor;
6) secondary centrifuging: by step 5) after washing, contain the centrifugal 5min of black-and-blue sedimentary mixed liquor 3000-4000rpm in centrifuge;
7) dry: by step 6) in black-and-blue sediment-40～-50 ℃ of dry 20-24h in vacuum freeze drier of obtaining after centrifugal, drying pressure is 40Pa, can obtain dry ferric tannate sample, dried sample is placed in normal temperature in sealing bag and preserves.
3. the preparation method of the adsorption catalyst for sewage water denitrification as claimed in claim 2, is characterized in that step 1) described in tannic acid and FeCl
3solution concentration is 0.001～0.02mol/L.
4. the preparation method of the adsorption catalyst for sewage water denitrification as claimed in claim 2, is characterized in that step 1) described in tannic acid and FeCl
3the volume ratio of solution is 1:40～1:10.
5. the preparation method of the adsorption catalyst for sewage water denitrification as claimed in claim 2, is characterized in that step 5) described in while washing each distillation water yield of adding be black-and-blue sedimentary 2-5 doubly.
6. the application that the adsorption catalyst for sewage water denitrification claimed in claim 1 is processed at sewage water denitrification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210530793.9A CN103041856B (en) | 2012-12-10 | 2012-12-10 | Novel adsorption catalyst for nitrogen removal of sewage and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210530793.9A CN103041856B (en) | 2012-12-10 | 2012-12-10 | Novel adsorption catalyst for nitrogen removal of sewage and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103041856A CN103041856A (en) | 2013-04-17 |
| CN103041856B true CN103041856B (en) | 2014-09-17 |
Family
ID=48054853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210530793.9A Active CN103041856B (en) | 2012-12-10 | 2012-12-10 | Novel adsorption catalyst for nitrogen removal of sewage and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103041856B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107840429B (en) * | 2017-11-13 | 2018-10-19 | 江苏环保产业技术研究院股份公司 | A kind of organometallic polymer material and its preparation method and application of removal Cr VI |
| CN110116000A (en) * | 2019-04-04 | 2019-08-13 | 杭州师范大学 | A kind of sludge carbon-supported catalysts and its preparation method and application |
| CN112007694A (en) * | 2020-09-16 | 2020-12-01 | 河北科技大学 | Embedded catalyst, preparation method thereof and application thereof in wastewater denitrification |
| CN114191988A (en) * | 2021-11-25 | 2022-03-18 | 宜宾学院 | Application of membrane material in simultaneous removal of ammonia nitrogen and nitrite nitrogen in water |
| CN115608334B (en) * | 2022-10-16 | 2023-11-28 | 北京碧水源膜科技有限公司 | NH (NH) 4+ /NO 2- Composite adsorbent, preparation method thereof and ammonia nitrogen treatment system applying composite adsorbent |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6126416B2 (en) * | 1981-09-30 | 1986-06-20 | Denka Seiyaku Kk | |
| US4734216A (en) * | 1986-01-23 | 1988-03-29 | Dearborn Chemical Company, Limited | Composition and method for flocculating and removing solids suspended in water |
| CN1039400A (en) * | 1989-05-02 | 1990-02-07 | 华南理工大学 | The oil field preparation method of flocculation-inhibiter |
| CN1460648A (en) * | 2003-02-21 | 2003-12-10 | 四川省内江市威士通环保产品厂 | Double-machine flocculant |
| CN1490256A (en) * | 2003-08-27 | 2004-04-21 | 中国科学院沈阳应用生态研究所 | Economic inorganic-organic composite flocculant |
| CN101092555A (en) * | 2007-07-26 | 2007-12-26 | 中国林业科学研究院资源昆虫研究所 | Method for preparing drilling diluter of TARA sulfonated tannin |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101342481B (en) * | 2008-08-18 | 2010-12-08 | 北京思清源生物科技有限公司 | Preparation method for iron-tannic acid adsorption agent with high-ctivity dephosphorization and uses thereof |
-
2012
- 2012-12-10 CN CN201210530793.9A patent/CN103041856B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6126416B2 (en) * | 1981-09-30 | 1986-06-20 | Denka Seiyaku Kk | |
| US4734216A (en) * | 1986-01-23 | 1988-03-29 | Dearborn Chemical Company, Limited | Composition and method for flocculating and removing solids suspended in water |
| CN1039400A (en) * | 1989-05-02 | 1990-02-07 | 华南理工大学 | The oil field preparation method of flocculation-inhibiter |
| CN1460648A (en) * | 2003-02-21 | 2003-12-10 | 四川省内江市威士通环保产品厂 | Double-machine flocculant |
| CN1490256A (en) * | 2003-08-27 | 2004-04-21 | 中国科学院沈阳应用生态研究所 | Economic inorganic-organic composite flocculant |
| CN101092555A (en) * | 2007-07-26 | 2007-12-26 | 中国林业科学研究院资源昆虫研究所 | Method for preparing drilling diluter of TARA sulfonated tannin |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103041856A (en) | 2013-04-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103041856B (en) | Novel adsorption catalyst for nitrogen removal of sewage and preparation method thereof | |
| CN103611514B (en) | Multi-functional adsorption particle and the preparation method of the unbalance industrial organic waste water of nitrogen phosphorus can be processed | |
| Sancho et al. | Recovery of ammonia from domestic wastewater effluents as liquid fertilizers by integration of natural zeolites and hollow fibre membrane contactors | |
| Chen et al. | Biodegradability enhancement of coking wastewater by catalytic wet air oxidation using aminated activated carbon as catalyst | |
| CN102247804A (en) | Preparation method of active carbon fiber phosphorous removing agent carrying lanthanum hydroxide | |
| CN103801395A (en) | Graphene material modified by water-soluble anthraquinone compound and preparation method of graphene material | |
| CN104587960A (en) | Preparation method of dephosphorization high-temperature modified aluminum sludge | |
| CN103599745A (en) | Modified calcium silicate and its application in sewage dephosphorization | |
| CN102849849B (en) | Method for treating urban domestic sewage based on magnetic nanomaterial reinforced activated sludge | |
| CN113398987B (en) | Heteropolyacid composite catalyst material H 3 PW 12 O 40 PAN and preparation method and application thereof | |
| CN103623790B (en) | For polymer-function material and the preparation method of adsorption treatment organic chemical waste water | |
| Kong et al. | Influence of modified biochar supported sulfidation of nano-zero-valent-iron (S-nZVI/BC) on nitrate removal and greenhouse gas emission in constructed wetland | |
| Hashem et al. | Bioadsorption of Cd (II) from contaminated water on treated sawdust: adsorption mechanism and optimization | |
| CN102875406B (en) | Special composite mimic enzyme for advanced treatment of pulping and paper-making waste water, and preparation method and application thereof | |
| CN103663731B (en) | Porous adsorbent for adsorbing and biologically degrading petrochemical wastewater and preparation method | |
| CN111807653B (en) | Heteropolyacid-sludge-based adsorbent and preparation method and application thereof | |
| KR101653382B1 (en) | Manufacuring method of complex adsorbent for ammonia removal | |
| CN110386633B (en) | Denitrification and/or phosphorus removal medicament, preparation thereof and application thereof in wastewater adsorption and combined production of slow release fertilizer | |
| Mažeikienė et al. | Removal of ammonium ions from digested sludge fugate by using natural zeolite | |
| Chen et al. | Removal of dye wastewater COD by sludge based activated carbon | |
| CN109516522B (en) | Application of organic-inorganic hybrid zeolite in treatment of ammonia nitrogen wastewater | |
| CN103641202A (en) | Suspension type biodegradation adsorption tower for treating nutrient-unbalanced refractory organic waste water | |
| CN103623789B (en) | Process multi-functional absorption agent and the preparation method of petrochemical wastewater for enhanced biodegradation | |
| KR20080071762A (en) | Enhanced biosorption of reactive dyes by chemical modification of corynebacterium glutamicum biomass | |
| Zhang et al. | Fenton-like mineralization of anion surfactant by Fe2O3/attapulgite catalyst |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |