CN108946835A - A kind of absorption-flocculating settling agent and its preparation method and application - Google Patents
A kind of absorption-flocculating settling agent and its preparation method and application Download PDFInfo
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- CN108946835A CN108946835A CN201810766012.3A CN201810766012A CN108946835A CN 108946835 A CN108946835 A CN 108946835A CN 201810766012 A CN201810766012 A CN 201810766012A CN 108946835 A CN108946835 A CN 108946835A
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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
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- 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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
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Abstract
The present invention relates to a kind of absorption-flocculating settling agents and its preparation method and application, including following weight parts raw material components: 50~80 parts of aluminium polychloride, 40~60 parts of Lotus root congee, 20~30 parts of diatomite, 5~10 parts of cationic-type polyacrylamide.The present invention prepares the aluminium polychloride of purity is high using simple and rapid method, as inorganic polymer flocculant part in absorption-flocculating settling agent, has the advantages that flocculating effect is good, wadding body is big, sedimentation is rapid；The nontoxic natural sorptive material such as Lotus root congee and diatomite is added and improves the treatment effect to electroplating wastewater, reduces sludge secondary treatment difficulty.Novel adsorption-the flocculating settling agent can be completed at the same time the double effects of absorption and flocculation sedimentation, to reduce electroplating wastewater processing cost, shorten process cycle.
Description
Technical field
The invention belongs to technical field of waste water processing, a kind of absorption-flocculating settling agent and its preparation are concretely related to
Methods and applications.
Background technique
Electroplating industry is one of current global three big industrial pollution, and electroplating technology is in rows such as machine manufacture, light industry and electronics
Industry extensive application, the electroplate factory in China is more than 10,000 at present, the annual electroplating wastewater for discharging upper billion cubic meter.Plating is useless
Contain the harmful substances such as heavy metal ion, organic compound and the inorganic compounds such as a large amount of chromium, nickel, lead, electroplating wastewater in water
If being discharged directly into water body without improvement, huge threat inherently is generated to ecological environment and human being's production, life.Mesh
Preceding common electroplating effluent treatment method has physical method, chemical method, bioanalysis, membrane processing method etc., but traditional physical method, chemistry
Method has that water treatment effect is general and is also easy to produce secondary pollution；There are when operational management for bioanalysis and membrane processing method
Between it is long, be difficult to realize the problem of extensive sewage treatment.
Absorption-flocculent precipitation is the novel electroplating wastewater treatment method for integrating physical absorption Yu flocculation sedimentation, tool
There is at low cost, simple process, high-efficient and the characteristics of multiple pollutant in electroplating wastewater can be removed simultaneously, is currently processed electricity
Waste electroplating provides new approaches.
A kind of important method of the flocculent precipitation as electroplating wastewater processing, has that simple process, high-efficient, expense is low etc.
Advantage is one of widely used method during electroplating wastewater processing.Flocculant currently used for electroplating wastewater processing is main
For inorganic polymer flocculant.Inorganic polymer flocculant wide, lower-price characteristic with raw material sources.But due to inorganic
High polymer coagulant relative molecular mass is low, and dosage is more, and the sludge quantity of generation is larger, and to colloidal particle in sewage
Adsorption bridging is indifferent, these factors all restrict its extensive use in electroplating wastewater processing.
Summary of the invention
In order to overcome the shortcomings of the prior art, the present invention provides it is a kind of it is compound, dosage is few, rapidly and efficiently new
Type absorption-flocculating settling agent and its preparation method and application, the double action with adsorbent and flocculant use pH range
Extensively, Heavy Metals in Waters ion isolation speed is fast, and can significantly improve the COD removal efficiency of electroplating wastewater.
A kind of absorption-flocculating settling agent, including following weight parts raw material components: 50~80 parts of aluminium polychloride, Lotus root congee
40~60 parts, 20~30 parts of diatomite, 5~10 parts of cationic-type polyacrylamide.
Preferably, the aluminium polychloride is prepared by inorganic aluminate, inorganic acid, aluminium polychloride partial size is 70
~100nm, insolubles content≤5%.
Preferably, the Lotus root congee is prepared by the following method: lotus rhizome being cleaned rear peeling, is cut into pieces, is dried in the air
Dry be placed in air dry oven is dried to constant weight, crosses 200 mesh vibrating screens after crushed and is sieved.
Preferably, the diatomite is the diatomite after heat treatment, the heat treatment are as follows: 2h is calcined under the conditions of 450 DEG C,
Wherein SiO2Content >=60%, 40~65m of specific surface area2/ g, 0.45~0.98m of pore volume3/ g, 80~120nm of partial size.
A kind of preparation method of absorption-flocculating settling agent, includes the following steps:
(1) preparation of aluminium polychloride: aluminium hydroxide is added in concentrated hydrochloric acid solution, is warming up to 100~130 DEG C instead
It answers, after aluminium hydroxide all dissolution, cools to 40~70 DEG C, adjusting pH value is 3~5, then is warming up to 100~130 DEG C of reactions,
Pale yellow transparent polymeric aluminum chlorides solution is obtained, drying grinding obtains aluminium polychloride product；
(2) preparation of cationic-type polyacrylamide: by monomeric acrylamide and acrylyl oxy-ethyl-trimethyl salmiac
Be proportionally added into container, adding water to monomer mass score is 20~40%, and adjusting solution ph is 3~6, lead to nitrogen 20~
40min is added the photoinitiator that mass fraction is 2~6 ‰ and carries out illumination reaction, obtains the cationic polypropylene of clear gum
Amide；Reaction product drying, grinding are obtained into powdered cationic type polyacrylamide；
(3) preparation of Lotus root congee: cleaning rear peeling for lotus rhizome, cut into pieces, and dries and is placed on drying in air dry oven
To constant weight, sieved after crushed；
(4) heat treatment of diatomite: the diatomite of certain mass being placed under the conditions of 400~500 DEG C and is calcined, and obtains hot place
Diatomite after reason；
(5) by the silicon after the above-mentioned aluminium polychloride being prepared, cationic-type polyacrylamide, Lotus root congee and heat treatment
Diatomaceous earth is added in container according to a certain percentage, and the mass fraction for adding water to flocculant is 10~30%, is stirred to react, will be prepared
Obtained inorganic-organic composite macromolecular flocculant centrifugation, drying are ground up, sieved, obtain powdered absorption-flocculation sedimentation
Agent.
Preferably, aluminium polychloride partial size is 70~100nm, insolubles content≤5%.
Preferably, the cationic-type polyacrylamide molecular weight of synthesis is between 4,000,000~9,000,000.
Preferably, the diatomite SiO after heat treatment2Content >=60%, 40~65m of specific surface area2/ g, pore volume 0.45
~0.98m3/ g, 80~120nm of partial size.
Preferably, the preparation method of the absorption-flocculating settling agent, specifically include the following steps:
(1) preparation of aluminium polychloride: aluminium hydroxide is added in concentrated hydrochloric acid solution under agitation, is warming up to
110 DEG C of 2~3h of reaction cool to 50~60 DEG C after aluminium hydroxide all dissolution, the sodium hydroxide for being 30% with mass concentration
The pH value that solution adjusts solution is 3.0~5.0, then is warming up to 110 DEG C, and 30~60min is reacted under stirring condition, is obtained faint yellow
Transparent polymeric liquor alumini chloridi, drying grinding obtains aluminium polychloride product at 55 DEG C；
(2) preparation of cationic-type polyacrylamide: by monomeric acrylamide and acrylyl oxy-ethyl-trimethyl salmiac
It is added in wide-mouth bottle according to mass fraction 1:1, adding water to monomer mass score is 30%, and adjusting solution ph is 5, is being stirred
It is passed through nitrogen 30min under state, the photoinitiator 2959 that mass fraction is 4 ‰ is added, is placed under the conditions of lamp and high pressure mercury instead
1h is answered, the cationic-type polyacrylamide of clear gum is obtained；Reaction product is placed in a vacuum drying oven, under the conditions of 80 DEG C
Drying, grinding obtain powdered cationic type polyacrylamide；
(3) preparation of Lotus root congee: cleaning rear peeling for lotus rhizome, cut into pieces, and dries and is placed on drying in air dry oven
To constant weight, 200 mesh vibrating screens are crossed after crushed and are sieved；
(4) heat treatment of diatomite: calcining 2h in the Muffle furnace under the conditions of the diatomite of certain mass is placed in 450 DEG C,
Diatomite after being heat-treated；
(5) by the silicon after the above-mentioned aluminium polychloride being prepared, cationic-type polyacrylamide, Lotus root congee and heat treatment
Diatomaceous earth is added in wide-mouth bottle according to a certain percentage, and the mass fraction for adding water to flocculant is 20%, in the magnetic force of 900r/min
It is stirred to react 2h under stirring condition, the inorganic-organic composite macromolecular flocculant that will be prepared, in the condition of 6000r/min
Lower centrifuge separation dries bottom solid after discarding supernatant liquid in 70 DEG C of vacuum drying oven, and ground 200 mesh obtains powder
Absorption-flocculating settling agent of last shape.
The present invention also provides the applications of above-mentioned absorption-flocculating settling agent, include the following steps:
(1) electroplating wastewater conditioning is handled: taking electroplating wastewater, the suction that mass fraction is 1~6 ‰ is added into the electroplating wastewater
Attached-flocculating settling agent, stirring make precipitating reagent be uniformly dispersed, and are with the pH value that hydrochloric acid and sodium hydroxide solution adjust electroplating wastewater
6.5~8.5；
(2) electroplating wastewater flocculating setting is handled: being stirred for 5~30min makes electroplating wastewater absorption, flocculates, and standing 5~
30min settles flocculate.
The present invention prepares the aluminium polychloride of purity is high using simple and rapid method, heavy as absorption-flocculation
Inorganic polymer flocculant part in the agent of shallow lake has the advantages that flocculating effect is good, wadding body is big, sedimentation is rapid；Be added Lotus root congee and
The nontoxic natural sorptive material such as diatomite improves the treatment effect to electroplating wastewater, reduces sludge secondary treatment difficulty.It should
Novel adsorption-flocculating settling agent can be completed at the same time the double effects of absorption and flocculation sedimentation, to reduce electroplating wastewater processing
Cost shortens process cycle.
Specific embodiment
The present invention is further explained in the light of specific embodiments, but invention which is intended to be protected is not limited to
This.
Embodiment 1
A kind of novel adsorption-flocculating settling agent, is matched by following raw material: aluminium polychloride: 60 parts, lotus rhizome
Powder: 60 parts, diatomite: 20 parts, cationic-type polyacrylamide: 5 parts.
The preparation method of above-mentioned absorption-flocculating settling agent, specifically include the following steps:
(1) preparation of aluminium polychloride: aluminium hydroxide is added in concentrated hydrochloric acid solution under agitation, is warming up to
110 DEG C of reaction 2.5h cool to 55 DEG C after aluminium hydroxide all dissolution, are adjusted with the NaOH solution that mass concentration is 30%
The pH value of solution is 4, then is warming up to 110 DEG C, reacts 45min under stirring condition, obtains pale yellow transparent polymeric aluminum chlorides solution,
Drying grinding obtains aluminium polychloride product at 55 DEG C；Wherein, aluminium polychloride partial size be 80nm, insolubles content≤
5%；
(2) preparation of cationic-type polyacrylamide: by monomeric acrylamide and acrylyl oxy-ethyl-trimethyl salmiac
It is added in wide-mouth bottle according to mass fraction 1:1, adding water to monomer mass score is 30%, and adjusting solution ph is 5, is being stirred
It is passed through nitrogen 30min under state, the photoinitiator 2959 that mass fraction is 4 ‰ is added, is placed under the conditions of lamp and high pressure mercury instead
1h is answered, the cationic-type polyacrylamide of clear gum is obtained；Reaction product is placed in a vacuum drying oven, under the conditions of 80 DEG C
Drying, grinding obtain powdered cationic type polyacrylamide；
(3) preparation of Lotus root congee: cleaning rear peeling for lotus rhizome, cut into pieces, and dries and is placed on drying in air dry oven
To constant weight, 200 mesh vibrating screens are crossed after crushed and are sieved；
(4) heat treatment of diatomite: calcining 2h in the Muffle furnace under the conditions of the diatomite of certain mass is placed in 450 DEG C,
Diatomite after being heat-treated；In treated diatomite, SiO2Content >=60%, specific surface area 55m2/ g, pore volume
0.65m3/ g, partial size 100nm；
(5) by the silicon after the above-mentioned aluminium polychloride being prepared, cationic-type polyacrylamide, Lotus root congee and heat treatment
Diatomaceous earth is added in wide-mouth bottle according to a certain percentage, and the mass fraction for adding water to flocculant is 20%, in the magnetic force of 900r/min
It is stirred to react 2h under stirring condition, the inorganic-organic composite macromolecular flocculant that will be prepared, in the condition of 6000r/min
Lower centrifuge separation dries bottom solid after discarding supernatant liquid in 70 DEG C of vacuum drying oven, and ground 200 mesh obtains powder
Absorption-flocculating settling agent of last shape.
The above novel adsorption-flocculating settling agent carry out electroplating effluent treatment method sequence the following steps are included:
(1) electroplating wastewater conditioning is handled: taking electroplate factory of Linan City electroplating wastewater, quality point is added into the electroplating wastewater
Novel adsorption-flocculating settling agent that number is 2 ‰, stirring 10min makes the absorption-flocculating settling agent be uniformly dispersed, with the amount of substance
The pH value that the HCl and NaOH solution that concentration is 1mol/L adjust sewage is 7；
(2) electroplating wastewater absorption-flocculating setting processing: being stirred for 10min makes electroplating wastewater absorption, flocculation, stands 20min
Settle flocculate.
Treated, and electroplating wastewater indices are as shown in table 1:
Table 1
Adopting said method carries out treated electroplating wastewater nickel content and is reduced to 0.245mg/L by 26.751mg/L；Copper contains
Amount is reduced to 0.196mg/L by 17.452mg/L；COD value drops to 41mg/L by 276mg/L, and COD removal rate is 85%, realizes
Treated discharged wastewater met the national standard.
Embodiment 2
A kind of novel adsorption-flocculating settling agent, is matched by following raw material: aluminium polychloride: 50 parts, lotus rhizome
Powder: 60 parts, 30 parts of diatomite, cationic-type polyacrylamide: 8 parts.
The preparation method of above-mentioned absorption-flocculating settling agent, specifically include the following steps:
(1) preparation of aluminium polychloride: aluminium hydroxide is added in concentrated hydrochloric acid solution under agitation, is warming up to
110 DEG C of reaction 2.5h cool to 55 DEG C after aluminium hydroxide all dissolution, are adjusted with the NaOH solution that mass concentration is 30%
The pH value of solution is 4, then is warming up to 110 DEG C, reacts 45min under stirring condition, obtains pale yellow transparent polymeric aluminum chlorides solution,
Drying grinding obtains aluminium polychloride product at 55 DEG C；Wherein, aluminium polychloride partial size be 80nm, insolubles content≤
5%；
(2) preparation of cationic-type polyacrylamide: by monomeric acrylamide and acrylyl oxy-ethyl-trimethyl salmiac
It is added in wide-mouth bottle according to mass fraction 1:1, adding water to monomer mass score is 30%, and adjusting solution ph is 5, is being stirred
It is passed through nitrogen 30min under state, the photoinitiator 2959 that mass fraction is 4 ‰ is added, is placed under the conditions of lamp and high pressure mercury instead
1h is answered, the cationic-type polyacrylamide of clear gum is obtained；Reaction product is placed in a vacuum drying oven, under the conditions of 80 DEG C
Drying, grinding obtain powdered cationic type polyacrylamide；
(3) preparation of Lotus root congee: cleaning rear peeling for lotus rhizome, cut into pieces, and dries and is placed on drying in air dry oven
To constant weight, 200 mesh vibrating screens are crossed after crushed and are sieved；
(4) heat treatment of diatomite: calcining 2h in the Muffle furnace under the conditions of the diatomite of certain mass is placed in 450 DEG C,
Diatomite after being heat-treated；In treated diatomite, SiO2Content >=60%, specific surface area 55m2/ g, pore volume
0.65m3/ g, partial size 100nm；
(5) by the silicon after the above-mentioned aluminium polychloride being prepared, cationic-type polyacrylamide, Lotus root congee and heat treatment
Diatomaceous earth is added in wide-mouth bottle according to a certain percentage, and the mass fraction for adding water to flocculant is 20%, in the magnetic force of 900r/min
It is stirred to react 2h under stirring condition, the inorganic-organic composite macromolecular flocculant that will be prepared, in the condition of 6000r/min
Lower centrifuge separation dries bottom solid after discarding supernatant liquid in 70 DEG C of vacuum drying oven, and ground 200 mesh obtains powder
Absorption-flocculating settling agent of last shape.
The above novel adsorption-flocculating settling agent carry out electroplating effluent treatment method sequence the following steps are included:
(1) electroplating wastewater conditioning is handled: taking Yuyao City electroplate factory electroplating wastewater, quality point is added into the electroplating wastewater
Novel adsorption-flocculating settling agent that number is 3 ‰, stirring 10min make the flocculant be uniformly dispersed, are with substance withdrawl syndrome
The pH value that the HCl and NaOH solution of 1mol/L adjusts electroplating wastewater is 8；
(2) electroplating wastewater flocculating setting is handled: being stirred for 20min makes electroplating wastewater absorption, flocculation, and standing 10min makes to wad a quilt with cotton
Condensate sedimentation.
Treated, and electroplating wastewater indices are as shown in table 2:
Table 2
Adopting said method carries out treated electroplating wastewater trivalent chromium content and is reduced to 0.439mg/L by 30.172mg/L；
Cadmium content is reduced to 0.211mg/L by 10.683mg/L；COD value drops to 67mg/L by 355mg/L, and COD removal rate is 81%,
Realize treated discharged wastewater met the national standard.
Embodiment 3
A kind of novel adsorption-flocculating settling agent, is matched by following raw material: aluminium polychloride: 55 parts, lotus rhizome
Powder: 45 parts, diatomite: 25 parts, cationic-type polyacrylamide: 7 parts.
The preparation method of above-mentioned absorption-flocculating settling agent, specifically include the following steps:
(1) preparation of aluminium polychloride: aluminium hydroxide is added in concentrated hydrochloric acid solution under agitation, is warming up to
110 DEG C of reaction 3h cool to 55 DEG C after aluminium hydroxide all dissolution, are adjusted with the NaOH solution that mass concentration is 30% molten
The pH value of liquid is 4, then is warming up to 110 DEG C, reacts 50min under stirring condition, obtains pale yellow transparent polymeric aluminum chlorides solution,
Drying grinding obtains aluminium polychloride product at 55 DEG C；Wherein, aluminium polychloride partial size is 90nm, insolubles content≤5%；
(2) preparation of cationic-type polyacrylamide: by monomeric acrylamide and acrylyl oxy-ethyl-trimethyl salmiac
It is added in wide-mouth bottle according to mass fraction 1:1, adding water to monomer mass score is 30%, and adjusting solution ph is 5, is being stirred
It is passed through nitrogen 30min under state, the photoinitiator 2959 that mass fraction is 5 ‰ is added, is placed under the conditions of lamp and high pressure mercury instead
1h is answered, the cationic-type polyacrylamide of clear gum is obtained；Reaction product is placed in a vacuum drying oven, under the conditions of 80 DEG C
Drying, grinding obtain powdered cationic type polyacrylamide；
(3) preparation of Lotus root congee: cleaning rear peeling for lotus rhizome, cut into pieces, and dries and is placed on drying in air dry oven
To constant weight, 200 mesh vibrating screens are crossed after crushed and are sieved；
(4) heat treatment of diatomite: calcining 2h in the Muffle furnace under the conditions of the diatomite of certain mass is placed in 450 DEG C,
Diatomite after being heat-treated；
(5) by the silicon after the above-mentioned aluminium polychloride being prepared, cationic-type polyacrylamide, Lotus root congee and heat treatment
Diatomaceous earth is added in wide-mouth bottle according to a certain percentage, and the mass fraction for adding water to flocculant is 20%, in the magnetic force of 900r/min
It is stirred to react 2h under stirring condition, the inorganic-organic composite macromolecular flocculant that will be prepared, in the condition of 6000r/min
Lower centrifuge separation dries bottom solid after discarding supernatant liquid in 70 DEG C of vacuum drying oven, and ground 200 mesh obtains powder
Absorption-flocculating settling agent of last shape.
The above novel adsorption-flocculating settling agent carry out electroplating effluent treatment method sequence the following steps are included:
(1) electroplating wastewater conditioning is handled: taking electroplate factory of Linan City electroplating wastewater, quality point is added into the electroplating wastewater
Novel adsorption-flocculating settling agent that number is 3 ‰, stirring 10min makes the absorption-flocculating settling agent be uniformly dispersed, with the amount of substance
The pH value that the HCl and NaOH solution that concentration is 1mol/L adjust sewage is 7；
(2) electroplating wastewater absorption-flocculating setting processing: being stirred for 10min makes electroplating wastewater absorption, flocculation, stands 20min
Settle flocculate.
Treated, and electroplating wastewater indices are as shown in table 3:
Table 3
Embodiment 4
A kind of novel adsorption-flocculating settling agent, is matched by following raw material: aluminium polychloride: 70 parts, lotus rhizome
Powder: 50 parts, diatomite: 30 parts, cationic-type polyacrylamide: 6 parts.
The preparation method of above-mentioned absorption-flocculating settling agent, specifically include the following steps:
(1) preparation of aluminium polychloride: aluminium hydroxide is added in concentrated hydrochloric acid solution under agitation, is warming up to
110 DEG C of reaction 2.5h cool to 55 DEG C after aluminium hydroxide all dissolution, are adjusted with the NaOH solution that mass concentration is 30%
The pH value of solution is 4, then is warming up to 110 DEG C, reacts 45min under stirring condition, obtains pale yellow transparent polymeric aluminum chlorides solution,
Drying grinding obtains aluminium polychloride product at 55 DEG C；
(2) preparation of cationic-type polyacrylamide: by monomeric acrylamide and acrylyl oxy-ethyl-trimethyl salmiac
It is added in wide-mouth bottle according to mass fraction 1:1, adding water to monomer mass score is 30%, and adjusting solution ph is 5, is being stirred
It is passed through nitrogen 30min under state, the photoinitiator 2959 that mass fraction is 4 ‰ is added, is placed under the conditions of lamp and high pressure mercury instead
1h is answered, the cationic-type polyacrylamide of clear gum is obtained；Reaction product is placed in a vacuum drying oven, under the conditions of 80 DEG C
Drying, grinding obtain powdered cationic type polyacrylamide；
(3) preparation of Lotus root congee: cleaning rear peeling for lotus rhizome, cut into pieces, and dries and is placed on drying in air dry oven
To constant weight, 200 mesh vibrating screens are crossed after crushed and are sieved；
(4) heat treatment of diatomite: calcining 2h in the Muffle furnace under the conditions of the diatomite of certain mass is placed in 450 DEG C,
Diatomite after being heat-treated；
(5) by the silicon after the above-mentioned aluminium polychloride being prepared, cationic-type polyacrylamide, Lotus root congee and heat treatment
Diatomaceous earth is added in wide-mouth bottle according to a certain percentage, and the mass fraction for adding water to flocculant is 20%, in the magnetic force of 900r/min
It is stirred to react 2h under stirring condition, the inorganic-organic composite macromolecular flocculant that will be prepared, in the condition of 6000r/min
Lower centrifuge separation dries bottom solid after discarding supernatant liquid in 70 DEG C of vacuum drying oven, and ground 200 mesh obtains powder
Absorption-flocculating settling agent of last shape.
The above novel adsorption-flocculating settling agent carry out electroplating effluent treatment method sequence the following steps are included:
(1) electroplating wastewater conditioning is handled: taking electroplate factory of Linan City electroplating wastewater, quality point is added into the electroplating wastewater
Novel adsorption-flocculating settling agent that number is 5 ‰, stirring 10min makes the absorption-flocculating settling agent be uniformly dispersed, with the amount of substance
The pH value that the HCl and NaOH solution that concentration is 1mol/L adjust sewage is 8；
(2) electroplating wastewater absorption-flocculating setting processing: being stirred for 10min makes electroplating wastewater absorption, flocculation, stands 20min
Settle flocculate.
Treated, and electroplating wastewater indices are as shown in table 4:
Table 4
Embodiment 5
A kind of novel adsorption-flocculating settling agent, is matched by following raw material: aluminium polychloride: 80 parts, lotus rhizome
Powder: 60 parts, diatomite: 30 parts, cationic-type polyacrylamide: 10 parts.
The preparation method of above-mentioned absorption-flocculating settling agent, specifically include the following steps:
(1) preparation of aluminium polychloride: aluminium hydroxide is added in concentrated hydrochloric acid solution under agitation, is warming up to
130 DEG C of reaction 2h cool to 60 DEG C after aluminium hydroxide all dissolution, are adjusted with the NaOH solution that mass concentration is 30% molten
The pH value of liquid is 5, then is warming up to 130 DEG C, reacts 50min under stirring condition, obtains pale yellow transparent polymeric aluminum chlorides solution,
Drying grinding obtains aluminium polychloride product at 55 DEG C；
(2) preparation of cationic-type polyacrylamide: by monomeric acrylamide and acrylyl oxy-ethyl-trimethyl salmiac
It is added in wide-mouth bottle according to mass fraction 1:1, adding water to monomer mass score is 40%, and adjusting solution ph is 6, is being stirred
It is passed through nitrogen 40min under state, the photoinitiator 2959 that mass fraction is 6 ‰ is added, is placed under the conditions of lamp and high pressure mercury instead
1h is answered, the cationic-type polyacrylamide of clear gum is obtained；Reaction product is placed in a vacuum drying oven, under the conditions of 80 DEG C
Drying, grinding obtain powdered cationic type polyacrylamide；
(3) preparation of Lotus root congee: cleaning rear peeling for lotus rhizome, cut into pieces, and dries and is placed on drying in air dry oven
To constant weight, 200 mesh vibrating screens are crossed after crushed and are sieved；
(4) heat treatment of diatomite: calcining 2h in the Muffle furnace under the conditions of the diatomite of certain mass is placed in 500 DEG C,
Diatomite after being heat-treated；
(5) by the silicon after the above-mentioned aluminium polychloride being prepared, cationic-type polyacrylamide, Lotus root congee and heat treatment
Diatomaceous earth is added in wide-mouth bottle according to a certain percentage, and the mass fraction for adding water to flocculant is 30%, in the magnetic force of 900r/min
It is stirred to react 2h under stirring condition, the inorganic-organic composite macromolecular flocculant that will be prepared, in the condition of 6000r/min
Lower centrifuge separation dries bottom solid after discarding supernatant liquid in 70 DEG C of vacuum drying oven, and ground 200 mesh obtains powder
Absorption-flocculating settling agent of last shape.
The above novel adsorption-flocculating settling agent carry out electroplating effluent treatment method sequence the following steps are included:
(1) electroplating wastewater conditioning is handled: taking electroplate factory of Linan City electroplating wastewater, quality point is added into the electroplating wastewater
Novel adsorption-flocculating settling agent that number is 6 ‰, stirring 10min makes the absorption-flocculating settling agent be uniformly dispersed, with the amount of substance
The pH value that the HCl and NaOH solution that concentration is 1mol/L adjust sewage is 8；
(2) electroplating wastewater absorption-flocculating setting processing: being stirred for 10min makes electroplating wastewater absorption, flocculation, stands 20min
Settle flocculate.
Treated, and electroplating wastewater indices are as shown in table 5:
Table 5
Embodiment 6
A kind of novel adsorption-flocculating settling agent, is matched by following raw material: aluminium polychloride: 50 parts, lotus rhizome
Powder: 40 parts, diatomite: 20 parts, cationic-type polyacrylamide: 5 parts.
The preparation method of above-mentioned absorption-flocculating settling agent, specifically include the following steps:
(1) preparation of aluminium polychloride: aluminium hydroxide is added in concentrated hydrochloric acid solution under agitation, is warming up to
100 DEG C of reaction 2h cool to 50 DEG C after aluminium hydroxide all dissolution, are adjusted with the NaOH solution that mass concentration is 30% molten
The pH value of liquid is 3, then is warming up to 110 DEG C, reacts 30min under stirring condition, obtains pale yellow transparent polymeric aluminum chlorides solution,
Drying grinding obtains aluminium polychloride product at 55 DEG C；Wherein, aluminium polychloride partial size is 90nm, insolubles content≤5%；
(2) preparation of cationic-type polyacrylamide: by monomeric acrylamide and acrylyl oxy-ethyl-trimethyl salmiac
It is added in wide-mouth bottle according to mass fraction 1:1, adding water to monomer mass score is 20%, and adjusting solution ph is 4, is being stirred
It is passed through nitrogen 20min under state, the photoinitiator 2959 that mass fraction is 3 ‰ is added, is placed under the conditions of lamp and high pressure mercury instead
1h is answered, the cationic-type polyacrylamide of clear gum is obtained；Reaction product is placed in a vacuum drying oven, under the conditions of 80 DEG C
Drying, grinding obtain powdered cationic type polyacrylamide；
(3) preparation of Lotus root congee: cleaning rear peeling for lotus rhizome, cut into pieces, and dries and is placed on drying in air dry oven
To constant weight, 200 mesh vibrating screens are crossed after crushed and are sieved；
(4) heat treatment of diatomite: calcining 2h in the Muffle furnace under the conditions of the diatomite of certain mass is placed in 400 DEG C,
Diatomite after being heat-treated；In treated diatomite, SiO2Content >=60%, specific surface area 45m2/ g, pore volume
0.51m3/ g, partial size 120nm；
(5) by the silicon after the above-mentioned aluminium polychloride being prepared, cationic-type polyacrylamide, Lotus root congee and heat treatment
Diatomaceous earth is added in wide-mouth bottle according to a certain percentage, and the mass fraction for adding water to flocculant is 10%, in the magnetic force of 900r/min
It is stirred to react 2h under stirring condition, the inorganic-organic composite macromolecular flocculant that will be prepared, in the condition of 6000r/min
Lower centrifuge separation dries bottom solid after discarding supernatant liquid in 70 DEG C of vacuum drying oven, and ground 200 mesh obtains powder
Absorption-flocculating settling agent of last shape.
The above novel adsorption-flocculating settling agent carry out electroplating effluent treatment method sequence the following steps are included:
(1) electroplating wastewater conditioning is handled: taking electroplate factory of Linan City electroplating wastewater, quality point is added into the electroplating wastewater
Novel adsorption-flocculating settling agent that number is 2 ‰, stirring 10min makes the absorption-flocculating settling agent be uniformly dispersed, with the amount of substance
The pH value that the HCl and NaOH solution that concentration is 1mol/L adjust sewage is 7；
(2) electroplating wastewater absorption-flocculating setting processing: being stirred for 10min makes electroplating wastewater absorption, flocculation, stands 20min
Settle flocculate.
Treated, and electroplating wastewater indices are as shown in table 6:
Table 6
Claims (10)
1. a kind of absorption-flocculating settling agent, it is characterised in that including following weight parts raw material components: aluminium polychloride 50~80
Part, 40~60 parts of Lotus root congee, 20~30 parts of diatomite, 5~10 parts of cationic-type polyacrylamide.
2. absorption-flocculating settling agent according to claim 1, it is characterised in that: the aluminium polychloride be by inorganic aluminate,
Inorganic acid is prepared, and aluminium polychloride partial size is 70~100nm, insolubles content≤5%.
3. absorption-flocculating settling agent according to claim 1, it is characterised in that: the Lotus root congee is prepared by following methods
It obtains: lotus rhizome being cleaned into rear peeling, is cut into pieces, dry to be placed in air dry oven and dry to constant weight, cross 200 after crushed
Mesh vibrating screen is sieved.
4. absorption-flocculating settling agent according to claim 1, it is characterised in that: the diatomite is the diatom after heat treatment
Soil, the heat treatment are as follows: 2h is calcined under the conditions of 450 DEG C, wherein SiO2Content >=60%, 40~65m of specific surface area2/ g, pore volume
0.45~0.98m3/ g, 80~120nm of partial size.
5. absorption-flocculating settling agent preparation method described in a kind of claim 1, it is characterised in that include the following steps:
(1) preparation of aluminium polychloride: aluminium hydroxide is added in concentrated hydrochloric acid solution, is warming up to 100~130 DEG C of reactions, to
Aluminium hydroxide all after dissolution, cools to 40~70 DEG C, and adjusting pH value is 3~5, then is warming up to 100~130 DEG C of reactions, obtains
Pale yellow transparent polymeric aluminum chlorides solution, drying grinding obtain aluminium polychloride product；
(2) preparation of cationic-type polyacrylamide: by monomeric acrylamide and acrylyl oxy-ethyl-trimethyl salmiac press than
Example is added to the container, and adding water to monomer mass score is 20~40%, and adjusting solution ph is 3~6, leads to 20~40min of nitrogen,
The photoinitiator that mass fraction is 2~6 ‰ is added and carries out illumination reaction, obtains the cationic-type polyacrylamide of clear gum；
Reaction product drying, grinding are obtained into powdered cationic type polyacrylamide；
(3) preparation of Lotus root congee: cleaning rear peeling for lotus rhizome, cut into pieces, and dries to be placed in air dry oven and dry to perseverance
Weight, is sieved after crushed；
(4) heat treatment of diatomite: the diatomite of certain mass is placed under the conditions of 400~500 DEG C and is calcined, after obtaining heat treatment
Diatomite；
(5) by the diatomite after the above-mentioned aluminium polychloride being prepared, cationic-type polyacrylamide, Lotus root congee and heat treatment
It is added in container according to a certain percentage, the mass fraction for adding water to flocculant is 10~30%, is stirred to react, will be prepared
It is inorganic-organic composite macromolecular flocculant centrifugation, drying, be ground up, sieved, obtain powdered absorption-flocculating settling agent.
6. absorption-flocculating settling agent preparation method according to claim 5, it is characterised in that: aluminium polychloride partial size is
70~100nm, insolubles content≤5%.
7. absorption-flocculating settling agent preparation method according to claim 5, it is characterised in that: the cationic poly of synthesis
Acrylamide molecules amount is between 4,000,000~9,000,000.
8. absorption-flocculating settling agent preparation method according to claim 5, it is characterised in that: the diatomite after heat treatment
SiO2Content >=60%, 40~65m of specific surface area2/ g, 0.45~0.98m of pore volume3/ g, 80~120nm of partial size.
9. absorption-flocculating settling agent preparation method according to claim 5, it is characterised in that specifically include the following steps:
(1) preparation of aluminium polychloride: aluminium hydroxide is added in concentrated hydrochloric acid solution under agitation, is warming up to 110 DEG C
2~3h is reacted, after aluminium hydroxide all dissolution, cools to 50~60 DEG C, the sodium hydroxide solution for being 30% with mass concentration
The pH value for adjusting solution is 3.0~5.0, then is warming up to 110 DEG C, and 30~60min is reacted under stirring condition, obtains pale yellow transparent
Polymeric aluminum chlorides solution, drying grinding obtains aluminium polychloride product at 55 DEG C；
(2) preparation of cationic-type polyacrylamide: by monomeric acrylamide and acrylyl oxy-ethyl-trimethyl salmiac according to
Mass fraction 1:1 is added in wide-mouth bottle, and adding water to monomer mass score is 30%, and adjusting solution ph is 5, in stirring
Under be passed through nitrogen 30min, the photoinitiator 2959 that mass fraction is 4 ‰ is added, is placed under the conditions of lamp and high pressure mercury and reacts 1h,
Obtain the cationic-type polyacrylamide of clear gum；Reaction product is placed in a vacuum drying oven, is dried under the conditions of 80 DEG C,
Grinding obtains powdered cationic type polyacrylamide；
(3) preparation of Lotus root congee: cleaning rear peeling for lotus rhizome, cut into pieces, and dries to be placed in air dry oven and dry to perseverance
Weight is crossed 200 mesh vibrating screens after crushed and is sieved；
(4) heat treatment of diatomite: 2h is calcined in the Muffle furnace under the conditions of the diatomite of certain mass is placed in 450 DEG C, is obtained
Diatomite after heat treatment；
(5) by the diatomite after the above-mentioned aluminium polychloride being prepared, cationic-type polyacrylamide, Lotus root congee and heat treatment
It is added in wide-mouth bottle according to a certain percentage, the mass fraction for adding water to flocculant is 20%, in the magnetic agitation of 900r/min
Under the conditions of be stirred to react 2h, the inorganic-organic composite macromolecular flocculant that will be prepared, under conditions of 6000r/min from
Heart separation, dries bottom solid after discarding supernatant liquid, ground 200 mesh obtains powdered in 70 DEG C of vacuum drying oven
Absorption-flocculating settling agent.
10. absorption-flocculating settling agent application described in a kind of claim 1, it is characterised in that include the following steps:
(1) electroplating wastewater conditioning is handled: taking electroplating wastewater, the absorption-that mass fraction is 1~6 ‰ is added into the electroplating wastewater
Flocculating settling agent, stirring make precipitating reagent be uniformly dispersed, with the pH value that hydrochloric acid and sodium hydroxide solution adjust electroplating wastewater be 6.5~
8.5；
(2) electroplating wastewater flocculating setting is handled: being stirred for 5~30min makes electroplating wastewater absorption, flocculation, and standing 5~30min makes
Flocculate sedimentation.
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