CN110294521A - It is a kind of for removing the high polymer coagulant of sewage heavy metal - Google Patents
It is a kind of for removing the high polymer coagulant of sewage heavy metal Download PDFInfo
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- CN110294521A CN110294521A CN201910560762.XA CN201910560762A CN110294521A CN 110294521 A CN110294521 A CN 110294521A CN 201910560762 A CN201910560762 A CN 201910560762A CN 110294521 A CN110294521 A CN 110294521A
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- Prior art keywords
- high polymer
- polymer coagulant
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- nano zero
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Classifications
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- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
Abstract
The invention discloses a kind of for removing the high polymer coagulant of sewage heavy metal, each raw material including following parts by weight: 100 parts of mixed plant powder, 20~30 parts of polyacrylamide, 5~15 parts of the sodium hydroxide solution that mass concentration is 20~30%, 1~5 part of chitosan, 1~5 part of initiator, 20~30 parts, 0.1~1 part nano zero valence iron of powdered activated carbon, 1~5 part of regulator；The present invention further wraps up nano zero valence iron in the primary high polymer coagulant of preparation；More preferably, the heavy metal removing rate in sewage is high for flocculating effect.
Description
Technical field
The invention belongs to flocculant preparation technical field, in particular to a kind of macromolecule for removing sewage heavy metal is wadded a quilt with cotton
Solidifying agent.
Background technique
Flocculant can totally be divided into two class of inorganic flocculating agent and organic flocculant according to its chemical component.Wherein inorganic flocculation
Agent includes inorganic flocculant and inorganic polymer flocculant again；Organic flocculant includes synthetic polymeric flocculant, natural height again
Molecular flocculant and microbial flocculant.
At present for the processing of municipal sewage plant's sewage and sludge, flocculant add be it is essential, poly- third
Acrylamide series of products are as most widely used in flocculant at home water process, but the organic contamination in waste water and sludge
Object, heavy metal pollution problem are not solved effectively, are badly in need of one kind and are handled various waste water, efficiently sludge can be promoted to wad a quilt with cotton
The material that retrogradation is removed wherein organic pollutant and heavy metal while drop.
Summary of the invention
To solve the above problems, the invention discloses a kind of for removing the macromolecule of sewage heavy metal
Flocculant, each raw material including following parts by weight: 100 parts of mixed plant powder, 20~30 parts of polyacrylamide, mass concentration
For 20~30% 5~15 parts of sodium hydroxide solution, 1~5 part of chitosan, 1~5 part of initiator, 20~30 parts of powdered activated carbon,
1~5 part of 0.1~1 part of nano zero valence iron, regulator；
The initiator is according to mass fraction: 2 parts of ammonium ceric nitrates, 1 part of ammonium persulfate, 1 part of sodium hydrogensulfite are formulated；
The regulator is acid solution.
Preferably, the mixed plant powder is elm bark rubber powder, aloe rubber powder and cornstarch with 3~5:1~2:1 ratio
The mixture of example mixing.
The preparation method of above-mentioned high polymer coagulant, comprising the following steps:
S1: under the conditions of 50 DEG C~60 DEG C, mixed plant powder is successively added according to mass fraction into reactor, chitosan, is gathered
Water is added in acrylamide, initiator, sodium hydroxide solution, and regulator pH value is added dropwise to 5~6, under agitation, to system
Middle addition powdered activated carbon, is sufficiently mixed, and obtains primary high polymer coagulant；
S2: in a nitrogen environment, using dehydrated alcohol as protective agent, nano zero valence iron and primary high polymer coagulant are mixed
Stirring, is then added dropwise reducing agent solution, and stirring makes primary high polymer coagulant sufficiently wrap up nano zero valence iron after completion of dropwise addition, so
It is still aging afterwards, filter to take black precipitate, clean, it is dry, save to get.
Preferably, step S2 the following steps are included:
(1) the maintaining nitrogen purge 30min into reactor removes wherein oxygen；
(2) after reacted device pre-treatment, in a nitrogen environment, nano zero valence iron is added, and appropriate dehydrated alcohol is added simultaneously and makees
For protective agent, then primary high polymer coagulant is added thereto and stirs；
(3) excessive reducing agent solution is taken, is put into constant pressure funnel, under nitrogen environment and stirring, with 1~2 drop/sec
Speed instills in reactor, and 1~2h of rear stirring completely to be titrated makes primary high polymer coagulant sufficiently wrap up nano zero valence iron, quiet
Set ageing；
(4) mixed solution is filtered with Buchner funnel, remove supernatant, obtain black precipitate, with washes of absolute alcohol 4~
6 times, the black product of acquirement is put into vacuum oven and is freeze-dried, high polymer coagulant is obtained, in vacuum desiccator
It is closed to save for use.
Mixing speed is 50~120r/min in the step (2), (3).
Preferably, the quality of nano zero valence iron added in the step (2) be primary high polymer coagulant quality 1~
2 times.
Preferably, the potassium borohydride or sodium borohydride that reducing solution is 1.0~5.0mol/L in the step (3) are molten
Liquid.
The application of above-mentioned high polymer coagulant heavy metal in removal sewage, dosage are 0.5~2.5mg/L.
Beneficial effects of the present invention: primary high polymer coagulant prepared by the present invention, flocculating effect is good, further passes through
Add nano zero valence iron, on the one hand, flocculant aid can be played the role of, the migration that on the other hand can also reduce heavy metal turns
Change ability, but also the suction-operated of active carbon is combined, further increase the removal rate of heavy metal.
Detailed description of the invention
Nothing.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.Below with reference to embodiment, the present invention will be further described, it should be understood that these embodiments are only used for illustration
Purpose is in no way intended to limit protection scope of the present invention.
Embodiment 1
It is a kind of for removing the high polymer coagulant of sewage heavy metal, each raw material including following parts by weight: mixed plant powder 100
It is part, 5 parts of the sodium hydroxide solution that 20 parts of polyacrylamide, mass concentration are 20%, 1 part of chitosan, 1 part of initiator, powdered activated
20 parts, 0.1 part nano zero valence iron of charcoal, 1 part of regulator；
The initiator is according to mass fraction: 2 parts of ammonium ceric nitrates, 1 part of ammonium persulfate, 1 part of sodium hydrogensulfite are formulated；
The regulator is acid solution；The mixed plant powder is elm bark rubber powder, aloe rubber powder and cornstarch with the ratio of 3:1:1
The mixture of example mixing.
Above-mentioned high polymer coagulant the preparation method is as follows:
S1: under the conditions of 50 DEG C, mixed plant powder, chitosan, poly- third are successively added according to above-mentioned mass fraction into reactor
Water is added in acrylamide, initiator, sodium hydroxide solution, and regulator pH value is added dropwise to 6, under agitation, is added into system
Powdered activated carbon is sufficiently mixed, and obtains primary high polymer coagulant；
Embodiment 2
It is a kind of for removing the high polymer coagulant of sewage heavy metal, each raw material including following parts by weight: mixed plant powder 100
It is part, 5 parts of the sodium hydroxide solution that 25 parts of polyacrylamide, mass concentration are 25%, 3 parts of chitosan, 3 parts of initiator, powdered activated
25 parts, 0.5 part nano zero valence iron of charcoal, 3 parts of regulator；
The initiator is according to above-mentioned mass fraction: 2 parts of ammonium ceric nitrates, 1 part of ammonium persulfate, 1 part of sodium hydrogensulfite prepare and
At；
The mixed plant powder is the mixture that elm bark rubber powder, aloe rubber powder and cornstarch are mixed with the ratio of 4:2:1；
The regulator is acid solution.
Above-mentioned high polymer coagulant the preparation method is as follows:
S1: under the conditions of 55 DEG C, mixed plant powder, chitosan, polyacrylamide are successively added according to mass fraction into reactor
Water is added in amine, initiator, sodium hydroxide solution, and regulator pH value is added dropwise to 5.5, under agitation, powder is added into system
Shaped activated carbon is sufficiently mixed, and obtains primary high polymer coagulant；
Embodiment 3
It is a kind of for removing the high polymer coagulant of sewage heavy metal, each raw material including following parts by weight: mixed plant powder 100
It is part, 5 parts of the sodium hydroxide solution that 30 parts of polyacrylamide, mass concentration are 30%, 5 parts of chitosan, 5 parts of initiator, powdered activated
30 parts, 1 part nano zero valence iron of charcoal, 5 parts of regulator；
The initiator is according to mass fraction: 2 parts of ammonium ceric nitrates, 1 part of ammonium persulfate, 1 part of sodium hydrogensulfite are formulated；
The mixed plant powder is the mixture that elm bark rubber powder, aloe rubber powder and cornstarch are mixed with the ratio of 5:2:1；
The regulator is acid solution.
Above-mentioned high polymer coagulant the preparation method is as follows:
S1: under the conditions of 50 DEG C, mixed plant powder, chitosan, poly- third are successively added according to above-mentioned mass fraction into reactor
Water is added in acrylamide, initiator, sodium hydroxide solution, and regulator pH value is added dropwise to 5, under agitation, is added into system
Powdered activated carbon is sufficiently mixed, and obtains primary high polymer coagulant；
Comparative example 1
This comparative example is not added with mixed plant powder, the other the same as in Example 2.
Comparative example 2
This comparative example step S1 reaction temperature is room temperature (25 DEG C), the other the same as in Example 2.
Embodiment 4
The present embodiment is advanced optimizing of making on the basis of embodiment 2, and there are also following steps specifically after step S1:
S2: in a nitrogen environment, using dehydrated alcohol as protective agent, nano zero valence iron and primary high polymer coagulant are mixed
Stirring, is then added dropwise reducing agent solution, and stirring makes primary high polymer coagulant sufficiently wrap up nano zero valence iron after completion of dropwise addition, so
It is still aging afterwards, filter to take black precipitate, clean, it is dry, save to get.
Specifically,
(1) the maintaining nitrogen purge 25min into reactor removes wherein oxygen；
(2) after reacted device pre-treatment, in a nitrogen environment, nano zero valence iron is added, and appropriate dehydrated alcohol is added simultaneously and makees
For protective agent, then primary high polymer coagulant is added thereto and stirs；The matter of added nano zero valence iron in the step (2)
Amount is 1 times of primary high polymer coagulant quality.
(3) take excessive reducing agent solution, be put into constant pressure funnel, under nitrogen environment and stirring, with 1~2 drop/
The speed of second instills in reactor, and 1~2h of rear stirring completely to be titrated makes primary high polymer coagulant sufficiently wrap up nano zero-valence
Iron, it is still aging；
Mixing speed is 50r/min in the step (2), (3)；Reducing solution is the boron of 1.0mol/L in the step (3)
Hydrofining.
(4) mixed solution is filtered with Buchner funnel, removes supernatant, obtain black precipitate, it is clear with dehydrated alcohol
It washes 4 times, the black product of acquirement is put into vacuum oven and is freeze-dried, high polymer coagulant is obtained, in vacuum desiccator
In it is closed save it is stand-by.
Embodiment 5
The present embodiment is the variation made on the basis of embodiment 4, specifically, the step (2), (3)
Middle mixing speed is 100r/min；Reducing solution is the solution of potassium borohydride of 3.0mol/L in the step (3).
Embodiment 6
The present embodiment is the variation made on the basis of embodiment 4, specifically, the step (2), (3)
Middle mixing speed is 120r/min；Reducing solution is the solution of potassium borohydride of 5.0mol/L in the step (3).
Embodiment 7
The present embodiment is the variation made on the basis of embodiment 6, and specifically, reducing solution is in the step (3)
The sodium borohydride solution of 3.0mol/L.
Application of the above-mentioned high polymer coagulant in removal sewage wherein heavy metal, dosage 0.5mg/L.
In conjunction with the sewage of sewage plant, to the high polymer coagulant of embodiment 1-7 treated content of beary metal (Cd, Cr,
Cu), it is converted to removal rate value and is shown in Table 1；
The removal rate of 1 embodiment 1-7 sample heavy metal in sewage of table
| Sample | Cd(%) | Cr(%) | Cu(%) |
| Embodiment 1 | 95 | 96 | 98 |
| Embodiment 2 | 98 | 97 | 99 |
| Embodiment 3 | 97 | 97 | 99 |
| Comparative example 1 | 85 | 86 | 86 |
| Comparative example 2 | 91 | 90 | 92 |
| Embodiment 4 | 99 | 98 | 99 |
| Embodiment 5 | 98 | 97 | 98 |
| Embodiment 6 | 99 | 98 | 99 |
| Embodiment 7 | 99 | 99 | 99 |
From table 1 it follows that the sample of embodiment 1-7 is up to 95% or more to the heavy metal removing rate in sewage, it is above pair
Ratio 1,2, illustrates the addition of reaction temperature and plant mixed powder, is conducive to the removing heavy metals rate for improving flocculant, wherein implementing
The sample of example 7, the removal rate of Cd, Cu, Cr are up to 99%, and effect is very excellent, and can also be seen that a huge sum of money of embodiment 4-7
Belong to removal rate and be above embodiment 1-3 sample, illustrate to add nano zero valence iron, can aid in and improve flocculant to heavy metal
Removal rate, main cause are that on the one hand, nano zero valence iron can play the role of flocculant aid, on the other hand can also reduce weight
The Transport And Transformation ability of metal, but also the suction-operated of active carbon is combined, further increase the removal rate of heavy metal.
It should be understood that the application of the present invention is not limited to the above, it will be understood by those skilled in the art that can root
It is improved or converted according to above description, all these modifications and variations all should belong to the protection model of appended claims of the present invention
It encloses.
Claims (8)
1. a kind of for removing the high polymer coagulant of sewage heavy metal, it is characterised in that: each raw material including following parts by weight:
100 parts of mixed plant powder, 20~30 parts of polyacrylamide, 5~15 parts of the sodium hydroxide solution that mass concentration is 20~30%, shell
1~5 part of glycan, 1~5 part of initiator, 20~30 parts, 0.1~1 part nano zero valence iron of powdered activated carbon, 1~5 part of regulator；
The initiator is according to mass fraction: 2 parts of ammonium ceric nitrates, 1 part of ammonium persulfate, 1 part of sodium hydrogensulfite are formulated；
The regulator is acid solution.
2. according to claim 1 a kind of for removing the high polymer coagulant of sewage heavy metal, it is characterised in that: described
Mixed plant powder is the mixture that elm bark rubber powder, aloe rubber powder and cornstarch are mixed with 3~5:1~2:1 ratio.
3. the preparation method of high polymer coagulant of any of claims 1 or 2, it is characterised in that: the following steps are included:
S1: under the conditions of 50 DEG C~60 DEG C, mixed plant powder is successively added according to mass fraction into reactor, chitosan, is gathered
Water is added in acrylamide, initiator, sodium hydroxide solution, and regulator pH value is added dropwise to 5~6, under agitation, to system
Middle addition powdered activated carbon, is sufficiently mixed, and obtains primary high polymer coagulant；
S2: in a nitrogen environment, using dehydrated alcohol as protective agent, nano zero valence iron and primary high polymer coagulant are mixed
Stirring, is then added dropwise reducing agent solution, and stirring makes primary high polymer coagulant sufficiently wrap up nano zero valence iron after completion of dropwise addition, so
It is still aging afterwards, filter to take black precipitate, clean, it is dry, save to get.
4. the preparation method of high polymer coagulant according to claim 3, it is characterised in that: step S2 includes following step
It is rapid:
(1) the maintaining nitrogen purge 30min into reactor removes wherein oxygen；
(2) after reacted device pre-treatment, in a nitrogen environment, nano zero valence iron is added, and appropriate dehydrated alcohol is added simultaneously and makees
For protective agent, then primary high polymer coagulant is added thereto and stirs；
(3) excessive reducing agent solution is taken, is put into constant pressure funnel, under nitrogen environment and stirring, with 1~2 drop/sec
Speed instills in reactor, and 1~2h of rear stirring completely to be titrated makes primary high polymer coagulant sufficiently wrap up nano zero valence iron, quiet
Set ageing；
(4) mixed solution is filtered with Buchner funnel, remove supernatant, obtain black precipitate, with washes of absolute alcohol 4~
6 times, the black product of acquirement is put into vacuum oven and is freeze-dried, high polymer coagulant is obtained, in vacuum desiccator
It is closed to save for use.
5. the preparation method of high polymer coagulant according to claim 4, it is characterised in that: in the step (2), (3)
Mixing speed is 50~120r/min.
6. the preparation method of high polymer coagulant according to claim 5, it is characterised in that: added in the step (2)
The quality of nano zero valence iron be 1~2 times of primary high polymer coagulant quality.
7. the preparation method of high polymer coagulant according to claim 6, it is characterised in that: reduction in the step (3)
Property solution be 1.0~5.0mol/L potassium borohydride or sodium borohydride solution.
8. the application of high polymer coagulant described in claim 1 heavy metal in removal sewage, it is characterised in that: the high score
The dosage of sub- flocculant is 0.5~2.5mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910560762.XA CN110294521A (en) | 2019-06-26 | 2019-06-26 | It is a kind of for removing the high polymer coagulant of sewage heavy metal |
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| CN201910560762.XA CN110294521A (en) | 2019-06-26 | 2019-06-26 | It is a kind of for removing the high polymer coagulant of sewage heavy metal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110918068A (en) * | 2019-12-12 | 2020-03-27 | 西安工业大学 | Nano zero-valent iron microgel composite material and preparation method and regeneration method thereof |
| CN110980861A (en) * | 2019-12-19 | 2020-04-10 | 哈尔滨工业大学 | Preparation method and application of magnetic reduction microorganism flocculating agent |
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| CN106976942A (en) * | 2017-04-18 | 2017-07-25 | 河海大学 | A kind of organic polymer coargulator modified Nano Zero-valent Iron and its preparation method and application |
| CN107487831A (en) * | 2017-09-29 | 2017-12-19 | 太仓市金锚化工有限公司 | A kind of compound plant source high polymer coagulant |
| US9920498B2 (en) * | 2013-11-05 | 2018-03-20 | Crystal Lagoons (Curacao) B.V. | Floating lake system and methods of treating water within a floating lake |
| CN109368756A (en) * | 2018-11-23 | 2019-02-22 | 湖北康创科技有限公司 | Organic polymer coargulator and its preparation method and application |
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| CN103121742A (en) * | 2012-11-12 | 2013-05-29 | 武汉斯隆电气有限公司 | Inorganic-modified chitosan composite type polymeric flocculant |
| US9920498B2 (en) * | 2013-11-05 | 2018-03-20 | Crystal Lagoons (Curacao) B.V. | Floating lake system and methods of treating water within a floating lake |
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Cited By (4)
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| CN110918068A (en) * | 2019-12-12 | 2020-03-27 | 西安工业大学 | Nano zero-valent iron microgel composite material and preparation method and regeneration method thereof |
| CN110918068B (en) * | 2019-12-12 | 2022-12-20 | 西安工业大学 | Nano zero-valent iron microgel composite material and preparation method and regeneration method thereof |
| CN110980861A (en) * | 2019-12-19 | 2020-04-10 | 哈尔滨工业大学 | Preparation method and application of magnetic reduction microorganism flocculating agent |
| CN110980861B (en) * | 2019-12-19 | 2021-12-07 | 哈尔滨工业大学 | Preparation method and application of magnetic reduction microorganism flocculating agent |
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Application publication date: 20191001 |