CN109319908A - Modification of chitosan-sodium alginate composite flocculation agent preparation method and products thereof and application - Google Patents
Modification of chitosan-sodium alginate composite flocculation agent preparation method and products thereof and application Download PDFInfo
- Publication number
- CN109319908A CN109319908A CN201811319675.7A CN201811319675A CN109319908A CN 109319908 A CN109319908 A CN 109319908A CN 201811319675 A CN201811319675 A CN 201811319675A CN 109319908 A CN109319908 A CN 109319908A
- Authority
- CN
- China
- Prior art keywords
- chitosan
- modification
- sodium alginate
- flocculation agent
- composite flocculation
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5263—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
Abstract
The present invention relates to a kind of modification of chitosan-sodium alginate composite flocculation agent preparation methods, comprising the following steps: first obtains modification of chitosan with acrylic amide graft copolymerization chitosan；Then, modification of chitosan with sodium alginate is compound obtains flocculant.Compared with prior art, chitosan source used in the present invention is wide, cheap, and product can be biodegradable completely, therefore will not cause secondary pollution to environment.Chitosan and acrylic amide graft copolymerization are formed into molecular weight height, the stronger modification of chitosan of sequestering power, again with sodium alginate recombination reaction, the carboxyl on amino and sodium alginate strand in chitosan molecule chain is set to attract to form polyelectrolyte film by positive and negative charge, it can be enhanced and play charging neutrality and adsorption bridging with particle in water, to make the de- steady, flocculation of the particle in system, and accelerate the speed of sedimentation and filtering means dehydration.The advantages that good with flocculating effect, sinking speed is fast, and preparation is simple, safety and environmental protection.
Description
Technical field
The present invention relates to field of waste water treatment, the preparation of specifically a kind of modification of chitosan-sodium alginate composite flocculation agent
Method and products thereof and application.
Background technique
There are many ways to water pollution problems is on the rise at present, and water treatment problems also become increasingly severeer, water process,
Such as absorption, chemical oxidation, electrodialysis, biochemistry, ion exchange, but flocculent precipitation are still a kind of effective and lower-cost pre-
Processing method.Because it is that a kind for the treatment of process is simple, occupied area is few, and processing speed is fast.Processing cost it is relatively low at
Ripe method.
Chitosan as a kind of environment-friendly material, have it is from a wealth of sources, safe and non-toxic, cheap, changed shadow by pH
Ring it is small, be readily biodegradable with the outstanding features such as environmental-friendly, be a kind of positively charged cationic polymer, acid water-soluble
It can interact with polyanionic compound in liquid, form Polyelectrolyte Complex.After grafted polyacrylamide branch, make score
Containing a large amount of amino and organoammonium ions with chelation in the higher, structure of son amount, therefore have that performance is stable, flocculation effect
The advantage that fruit is good, sinking speed is fast.
Sodium alginate is a kind of linear polymer, has the characteristics that nontoxic, biodegradable fast and good biocompatibility.
Summary of the invention
Present invention aims at: a kind of preparation method of modification of chitosan-sodium alginate composite flocculation agent is provided.
Another object of the present invention is: providing a kind of compound wadding of modification of chitosan-sodium alginate of above method preparation
Solidifying agent product.
Another object of the present invention is to: a kind of application of the said goods is provided.
The object of the invention is realized by following proposal: a kind of preparation side of modification of chitosan-sodium alginate composite flocculation agent
Method, which is characterized in that chitosan is formed into molecular weight height with acrylic amide graft copolymerization, the stronger modified shell of sequestering power gathers
Sugar, then by with sodium alginate recombination reaction, make the carboxyl on the strand of the amino and sodium alginate in chitosan molecule chain
Attract to form polyelectrolyte film by positive and negative charge, enhancing plays charging neutrality and adsorption bridging with particle in water, to make
De- steady, flocculation and quickening sedimentation and filtering means dehydration the speed of particle in system, preparation step are as follows:
(1) acrylic amide graft copolymerization chitosan
A certain amount of chitosan acetic acid wiring solution-forming is weighed, is added in three-necked flask, the lasting lower water-bath of stirring is heated to 50-70
Ceric ammonium nitrate solution is added after DEG C, for a period of time, acrylamide monomer, the quality of chitosan and ammonium ceric nitrate is added in isothermal reaction
Than for (30-50): 1, the mass ratio of acrylamide and chitosan is 1:(4-8), the reaction was continued a period of time, obtains product；It will
A small amount of ethyl alcohol is added in product, adjusts pH to alkalescent with sodium hydroxide solution, copolymer, centrifuge separation, washing, drying is precipitated
Copolymer obtains acrylic amide graft copolymerization chitosan, i.e. modification of chitosan；
(2) modification of chitosan and sodium alginate are compound
Sodium alginate soln is added in modification of chitosan acetic acid solution, the mass ratio of sodium alginate and modification of chitosan is
(1-3): 1, it stirs evenly, adjusts pH with sodium hydroxide solution, reaction is continuously stirred at a temperature of 40-60 DEG C and is no less than 3h, i.e.,
Obtain modification of chitosan-sodium alginate composite flocculation agent.
In step (2): the reaction time is 3-7 h.
The present invention provides a kind of modification of chitosan-sodium alginate composite flocculation agent, is prepared according to any of the above-described the method
It obtains.Due to there is a large amount of amino in chitosan molecule chain, there are a large amount of carboxyl, therefore, the two on the strand of sodium alginate
It can attract to form polyelectrolyte film by positive and negative charge, the compound flocculation ability that can be obtained of the two is stronger, and flocculation range is wider array of
High efficiency composition flocculant.
The present invention provides a kind of modification of chitosan-sodium alginate composite flocculation agent answering in waste water from dyestuff purified treatment
With.
Compared with prior art, the invention has the following advantages that
Chitosan as a kind of environment-friendly material, have it is from a wealth of sources, safe and non-toxic, cheap, by pH variation influenced it is small,
Be readily biodegradable with the outstanding features such as environmental-friendly, chitosan and acrylic amide graft copolymerization form to molecular weight is high, chelating
The stronger modification of chitosan of ability, then by with sodium alginate recombination reaction, make amino and alginic acid in chitosan molecule chain
Carboxyl on the strand of sodium attracts to form polyelectrolyte film by positive and negative charge, can be enhanced and plays charging neutrality with particle in water
And adsorption bridging effect, to make de- steady, flocculation and quickening sedimentation and filtering means dehydration the speed of the particle in system.With flocculation
The advantages that effect is good, and sinking speed is fast, and preparation is simple, safety and environmental protection.It is to inorganic substances suspension or organic substance suspension
There is good catharsis, the pH range used is wide, and dosage is few, at low cost.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.
Embodiment 1
Weigh 1% acetic acid wiring solution-forming of a certain amount of chitosan, be added in the three-necked flask of 500 mL, heating water bath stir to
It is added ceric ammonium nitrate solution after 50 DEG C, the mass ratio of chitosan and ammonium ceric nitrate is 30:1, after isothermal reaction for a period of time, is added
Enter acrylamide monomer, the mass ratio of acrylamide and chitosan is 1:4, and the reaction was continued a period of time, obtains product.By product
A small amount of ethyl alcohol is added, adjusts pH to 9 with the sodium hydroxide solution of 1 mol/L, copolymer is precipitated, centrifuge separation, washing, drying are altogether
Polymers obtains acrylic amide graft copolymerization chitosan；
Sodium alginate soln is added in modification of chitosan acetic acid solution, the mass ratio of sodium alginate and modification of chitosan is 1:
1, it stirs evenly, adjusts pH with the sodium hydroxide solution of 1 mol/L, to get to changing after being continuously stirred at 40 DEG C reaction 7 hours
Property chitin-sodium alginate composite flocculation agent；
Waste water from dyestuff is handled with prepared modification of chitosan-sodium alginate composite flocculation agent, waste water from dyestuff it is initial
COD value is 425 mg/L, and the dosage of flocculant is 5 ‰, and by 10 minutes flocculation sedimentations, the removal rate of COD was 61.3%.
Embodiment 2
Weigh 1% acetic acid wiring solution-forming of a certain amount of chitosan, be added in the three-necked flask of 500 mL, heating water bath stir to
It is added ceric ammonium nitrate solution after 55 DEG C, the mass ratio of chitosan and ammonium ceric nitrate is 35:1, after isothermal reaction for a period of time, is added
Enter acrylamide monomer, the mass ratio of acrylamide and chitosan is 1:5, and the reaction was continued a period of time, obtains product.By product
A small amount of ethyl alcohol is added, adjusts pH to 9 with the sodium hydroxide solution of 1 mol/L, copolymer is precipitated, centrifuge separation, washing, drying are altogether
Polymers obtains acrylic amide graft copolymerization chitosan；
Sodium alginate soln is added in modification of chitosan acetic acid solution, the mass ratio of sodium alginate and modification of chitosan is 2:
1, it stirs evenly, adjusts pH with the sodium hydroxide solution of 1 mol/L, to get to changing after being continuously stirred at 45 DEG C reaction 6 hours
Property chitin-sodium alginate composite flocculation agent；
Certain waste water from dyestuff is handled with prepared modification of chitosan-sodium alginate composite flocculation agent, at the beginning of waste water from dyestuff
Beginning COD value is 425 mg/L, and the dosage of flocculant is 5 ‰, and by 10 minutes flocculation sedimentations, the removal rate of COD was
64.7%。
Embodiment 3
Weigh 1% acetic acid wiring solution-forming of a certain amount of chitosan, be added in the three-necked flask of 500 mL, heating water bath stir to
It is added ceric ammonium nitrate solution after 60 DEG C, the mass ratio of chitosan and ammonium ceric nitrate is 40:1, after isothermal reaction for a period of time, is added
Enter acrylamide monomer, the mass ratio of acrylamide and chitosan is 1:6, and the reaction was continued a period of time, obtains product.By product
A small amount of ethyl alcohol is added, adjusts pH to 9 with the sodium hydroxide solution of 1 mol/L, copolymer is precipitated, centrifuge separation, washing, drying are altogether
Polymers obtains acrylic amide graft copolymerization chitosan；
Sodium alginate soln is added in modification of chitosan acetic acid solution, the mass ratio of sodium alginate and modification of chitosan is 3:
1, it stirs evenly, adjusts pH with the sodium hydroxide solution of 1 mol/L, to get to changing after being continuously stirred at 50 DEG C reaction 5 hours
Property chitin-sodium alginate composite flocculation agent；
Certain waste water from dyestuff is handled with prepared modification of chitosan-sodium alginate composite flocculation agent, at the beginning of waste water from dyestuff
Beginning COD value is 425 mg/L, and the dosage of flocculant is 5 ‰, and by 10 minutes flocculation sedimentations, the removal rate of COD was
63.5%。
Embodiment 4
Weigh 1% acetic acid wiring solution-forming of a certain amount of chitosan, be added in the three-necked flask of 500 mL, heating water bath stir to
It is added ceric ammonium nitrate solution after 65 DEG C, the mass ratio of chitosan and ammonium ceric nitrate is 45:1, after isothermal reaction for a period of time, is added
Enter acrylamide monomer, the mass ratio of acrylamide and chitosan is 1:7, and the reaction was continued a period of time, obtains product.By product
A small amount of ethyl alcohol is added, adjusts pH to 9 with the sodium hydroxide solution of 1 mol/L, copolymer is precipitated, centrifuge separation, washing, drying are altogether
Polymers obtains acrylic amide graft copolymerization chitosan；
Sodium alginate soln is added in modification of chitosan acetic acid solution, the mass ratio of sodium alginate and modification of chitosan is 1:
1, it stirs evenly, adjusts pH with the sodium hydroxide solution of 1 mol/L, to get to changing after being continuously stirred at 55 DEG C reaction 4 hours
Property chitin-sodium alginate composite flocculation agent；
Certain waste water from dyestuff is handled with prepared modification of chitosan-sodium alginate composite flocculation agent, at the beginning of waste water from dyestuff
Beginning COD value is 425 mg/L, and the dosage of flocculant is 5 ‰, and by 10 minutes flocculation sedimentations, the removal rate of COD was
64.1%。
Embodiment 5
Weigh 1% acetic acid wiring solution-forming of a certain amount of chitosan, be added in the three-necked flask of 500 mL, heating water bath stir to
It is added ceric ammonium nitrate solution after 70 DEG C, the mass ratio of chitosan and ammonium ceric nitrate is 50:1, after isothermal reaction for a period of time, is added
Enter acrylamide monomer, the mass ratio of acrylamide and chitosan is 1:8, and the reaction was continued a period of time, obtains product.By product
A small amount of ethyl alcohol is added, adjusts pH to 9 with the sodium hydroxide solution of 1 mol/L, copolymer is precipitated, centrifuge separation, washing, drying are altogether
Polymers obtains acrylic amide graft copolymerization chitosan；
Sodium alginate soln is added in modification of chitosan acetic acid solution, the mass ratio of sodium alginate and modification of chitosan is 2:
1, it stirs evenly, adjusts pH with the sodium hydroxide solution of 1 mol/L, to get to changing after being continuously stirred at 60 DEG C reaction 3 hours
Property chitin-sodium alginate composite flocculation agent；
Certain waste water from dyestuff is handled with prepared modification of chitosan-sodium alginate composite flocculation agent, at the beginning of waste water from dyestuff
Beginning COD value is 425 mg/L, and the dosage of flocculant is 5 ‰, and by 10 minutes flocculation sedimentations, the removal rate of COD was
60.9%。
Claims (4)
1. a kind of modification of chitosan-sodium alginate composite flocculation agent preparation method, including following preparation step:
(1) acrylic amide graft copolymerization chitosan:
Chitosan acetic acid wiring solution-forming is weighed, is added in three-necked flask, lasting stir after lower water-bath is heated to certain temperature adds
Enter ceric ammonium nitrate solution, for a period of time, acrylamide monomer is added in 50-70 DEG C of isothermal reaction, and the reaction was continued a period of time, obtains
Product, wherein the mass ratio of chitosan and ammonium ceric nitrate is (30-50): 1；The mass ratio of acrylamide and chitosan is 1:(4-
8)；A small amount of ethyl alcohol will be added in product, adjusts pH to alkalescent with sodium hydroxide solution, copolymer is precipitated, is centrifugated, washes
It washs, dry copolymer, obtain acrylic amide graft copolymerization chitosan, i.e. modification of chitosan；
(2) modification of chitosan and sodium alginate are compound
Sodium alginate soln is added in modification of chitosan acetic acid solution, the mass ratio of sodium alginate and modification of chitosan is made
(1-3): 1, it stirs evenly, adjusts pH with sodium hydroxide solution, reaction is continuously stirred at 40-60 DEG C and is no less than 3 h to get arriving
Modification of chitosan-sodium alginate composite flocculation agent.
2. modification of chitosan-sodium alginate composite flocculation agent preparation method according to claim 1, it is characterised in that: step
Suddenly in (2), the reaction time is 3-7 h.
3. a kind of modification of chitosan-sodium alginate composite flocculation agent, it is characterised in that method system according to claim 1 or claim 2
It is standby to obtain.
4. modification of chitosan-sodium alginate composite flocculation agent answering in waste water from dyestuff purified treatment according to claim 3
With.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811319675.7A CN109319908A (en) | 2018-11-07 | 2018-11-07 | Modification of chitosan-sodium alginate composite flocculation agent preparation method and products thereof and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811319675.7A CN109319908A (en) | 2018-11-07 | 2018-11-07 | Modification of chitosan-sodium alginate composite flocculation agent preparation method and products thereof and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109319908A true CN109319908A (en) | 2019-02-12 |
Family
ID=65261097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811319675.7A Pending CN109319908A (en) | 2018-11-07 | 2018-11-07 | Modification of chitosan-sodium alginate composite flocculation agent preparation method and products thereof and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109319908A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110304762A (en) * | 2019-07-10 | 2019-10-08 | 浙江海印数码科技有限公司 | A kind of processing method for the dyeing waste water that absorption-flocculation-UF membrane combines |
| CN110550689A (en) * | 2019-08-26 | 2019-12-10 | 神美科技有限公司 | Organic-inorganic composite heavy metal ion trapping agent |
| CN110550818A (en) * | 2019-08-20 | 2019-12-10 | 生态环境部华南环境科学研究所 | Efficient biogas slurry desalting treatment process after fermentation of dairy cow breeding wastewater |
| CN110903015A (en) * | 2019-11-30 | 2020-03-24 | 河南永泽环境科技有限公司 | Production method of environment-friendly composite sludge conditioner |
| CN111995307A (en) * | 2020-08-31 | 2020-11-27 | 湖北工业大学 | Preparation method of protective coating material for marine peripheral buildings |
| CN113069929A (en) * | 2021-03-25 | 2021-07-06 | 南京师范大学 | Process for alleviating pollution of filter membrane by adding hydrophobic modified conditioner in membrane filtration process |
| CN114380373A (en) * | 2020-10-16 | 2022-04-22 | 天津大学 | Composite coagulant, preparation method thereof and application thereof in treatment of secondary effluent of sewage plant |
| CN115245812A (en) * | 2022-01-02 | 2022-10-28 | 华东理工大学 | Preparation method of chitosan/sodium alginate/acrylamide composite hydrogel |
| CN115353184A (en) * | 2022-08-30 | 2022-11-18 | 湖南仁和环境股份有限公司 | Surface-modified chitosan-agar flocculant and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1903741A (en) * | 2006-08-02 | 2007-01-31 | 袁毅桦 | Preparation method of chitin-alginic acid copolymer flocculant |
| CN102351341A (en) * | 2011-07-06 | 2012-02-15 | 武汉理工大学 | Preparation and application of paint waste water treatment agents |
| CN108017127A (en) * | 2017-11-14 | 2018-05-11 | 青岛卓森纳生物工程有限公司 | A kind of nano-high molecule carboxymethyl chitosan sewage treatment drug and processing method |
-
2018
- 2018-11-07 CN CN201811319675.7A patent/CN109319908A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1903741A (en) * | 2006-08-02 | 2007-01-31 | 袁毅桦 | Preparation method of chitin-alginic acid copolymer flocculant |
| CN102351341A (en) * | 2011-07-06 | 2012-02-15 | 武汉理工大学 | Preparation and application of paint waste water treatment agents |
| CN108017127A (en) * | 2017-11-14 | 2018-05-11 | 青岛卓森纳生物工程有限公司 | A kind of nano-high molecule carboxymethyl chitosan sewage treatment drug and processing method |
Non-Patent Citations (3)
| Title |
|---|
| 傅明连、郑君龙、薛丽贞: "壳聚糖/海藻酸钠复合絮凝剂的吸附性能", 《环境工程学报》 * |
| 张光华编: "《水处理化学品制备与应用指南》", 31 October 2003, 中国石化出版社 * |
| 王国全主编: "《聚合物改性 第3版》", 31 May 2016, 中国轻工业出版社 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110304762B (en) * | 2019-07-10 | 2021-11-05 | 浙江海印数码科技有限公司 | Method for treating printing and dyeing wastewater by combining adsorption-flocculation-membrane separation |
| CN110304762A (en) * | 2019-07-10 | 2019-10-08 | 浙江海印数码科技有限公司 | A kind of processing method for the dyeing waste water that absorption-flocculation-UF membrane combines |
| CN110550818A (en) * | 2019-08-20 | 2019-12-10 | 生态环境部华南环境科学研究所 | Efficient biogas slurry desalting treatment process after fermentation of dairy cow breeding wastewater |
| CN110550818B (en) * | 2019-08-20 | 2021-12-07 | 生态环境部华南环境科学研究所 | Efficient biogas slurry desalting treatment process after fermentation of dairy cow breeding wastewater |
| CN110550689A (en) * | 2019-08-26 | 2019-12-10 | 神美科技有限公司 | Organic-inorganic composite heavy metal ion trapping agent |
| CN110903015A (en) * | 2019-11-30 | 2020-03-24 | 河南永泽环境科技有限公司 | Production method of environment-friendly composite sludge conditioner |
| CN111995307A (en) * | 2020-08-31 | 2020-11-27 | 湖北工业大学 | Preparation method of protective coating material for marine peripheral buildings |
| CN111995307B (en) * | 2020-08-31 | 2022-04-29 | 湖北工业大学 | Preparation method of protective coating material for marine peripheral buildings |
| CN114380373A (en) * | 2020-10-16 | 2022-04-22 | 天津大学 | Composite coagulant, preparation method thereof and application thereof in treatment of secondary effluent of sewage plant |
| CN113069929A (en) * | 2021-03-25 | 2021-07-06 | 南京师范大学 | Process for alleviating pollution of filter membrane by adding hydrophobic modified conditioner in membrane filtration process |
| CN115245812A (en) * | 2022-01-02 | 2022-10-28 | 华东理工大学 | Preparation method of chitosan/sodium alginate/acrylamide composite hydrogel |
| CN115353184A (en) * | 2022-08-30 | 2022-11-18 | 湖南仁和环境股份有限公司 | Surface-modified chitosan-agar flocculant and preparation method and application thereof |
| CN115353184B (en) * | 2022-08-30 | 2024-01-26 | 湖南仁和环境股份有限公司 | Surface modified chitosan-agar flocculant and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109319908A (en) | Modification of chitosan-sodium alginate composite flocculation agent preparation method and products thereof and application | |
| CN104774290B (en) | A kind of pH, temperature dual sensitiveness chitosan flocculant and its preparation method and application | |
| Felse et al. | Studies on applications of chitin and its derivatives | |
| Cai et al. | Effect of hydrolysis degree of hydrolyzed polyacrylamide grafted carboxymethyl cellulose on dye removal efficiency | |
| CN105540807B (en) | A kind of dendroid cellulose base both sexes flocculating decoloring agent and preparation method thereof | |
| CN110105462A (en) | A kind of preparation method of modification of chitosan flocculant and products thereof and application | |
| CN101935097A (en) | Solid-liquid separation flocculating agent for waste drilling fluid and preparation method thereof | |
| Zhang et al. | Impact of molecular structure and charge property of chitosan based polymers on flocculation conditioning of advanced anaerobically digested sludge for dewaterability improvement | |
| Anthony et al. | Cationic starch for microalgae and total phosphorus removal from wastewater | |
| CN103172790A (en) | Hydrolysis graft strengthened anionic carboxymethyl cellulose flocculating agent and preparation method thereof | |
| CN108948269A (en) | A kind of environmentally friendly flocculant and preparation method | |
| Tian et al. | Preparation and flocculation performance study of a novel amphoteric alginate flocculant | |
| CN109021168A (en) | A method of caused using plasma and synthesizes chitosan-based flocculant | |
| CN108359103B (en) | Hydrophobic modified chitosan flocculant and preparation method and application thereof | |
| CN110229289A (en) | Preparation method of modified lignin resin base amphoteric flocculating agent and products thereof and application | |
| CN110104749A (en) | A kind of load titanium chitosan-ferric-polysilicate composite flocculation agent preparation and products thereof and application | |
| CN105622848B (en) | A kind of plasma causes the preparation method and applications of synthesis clearer | |
| CN100390076C (en) | Preparation method of chitin-alginic acid copolymer flocculant | |
| CN114014428B (en) | Environment-friendly flocculant and application thereof | |
| Feng et al. | Synthesis of a chitosan-based flocculant CS-gP (AM-IA-AATPAC) and evaluation of its performance on Ni2+ removal: Role of chelating-coordination and flocculation | |
| CN105481076A (en) | Tannin and chitosan-based environment-friendly water purifying agent and preparation method thereof | |
| CN114751597B (en) | Water treatment process based on composite magnetic flocculant | |
| CN109052593A (en) | Preparation method of composite flocculation agent and products thereof and application | |
| CN109231387A (en) | A kind of compound material for water treatment of stalk/aluminium polychloride and preparation method thereof | |
| CN114874445A (en) | Preparation method and application of dextran-polyaspartic acid anion flocculant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190212 |
|
| RJ01 | Rejection of invention patent application after publication |