CN109574173A - Efficient removing heavy metals, the organic coagulants of dephosphorization and its preparation and application - Google Patents
Efficient removing heavy metals, the organic coagulants of dephosphorization and its preparation and application Download PDFInfo
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- CN109574173A CN109574173A CN201811479079.5A CN201811479079A CN109574173A CN 109574173 A CN109574173 A CN 109574173A CN 201811479079 A CN201811479079 A CN 201811479079A CN 109574173 A CN109574173 A CN 109574173A
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- Prior art keywords
- dephosphorization
- heavy metals
- removing heavy
- organic
- organic coagulants
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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
- C02F1/54—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
- 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
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention proposes the organic coagulants and its preparation and application of a kind of efficient removing heavy metals, dephosphorization, the organic coagulants are by mass percentage, include following components: the organic polymer coargulator of 18%-25%, the aluminium polychloride of 13%-18%, the ferrous ion compound of 3%-8%, the diatomite of 1%-5%, the rare earth metal of 0.1%-1%, the water of surplus.The present invention can efficiently remove heavy metal and phosphorus in board wastewater, and the present invention also proposes the preparation method and application method of the organic coagulants, and preparation manipulation is simple, using easy control of process conditions, greatly reduces cost of sewage disposal.
Description
Technical field
The present invention relates to a kind of efficient removing heavy metals, the organic coagulants and its preparation and application of dephosphorization.
Background technique
Current information-intensive society, electronics industry rapid development, resulting board wastewater and electroplating wastewater are also in day
Benefit increases.The water of board wastewater and electroplating wastewater is all very big, and wastewater source is various, complicated component, and waste strength difference is outstanding
Different and distinct, main pollutant component is based on heavy metal and phosphorus.Wastewater treatment method have chemical method (chemical precipitation method,
Ion-exchange, electrolysis method etc.), physical method (various decanting process, filtration method, absorption method, electrodialysis, reverse osmosis etc.) and biology
Method.Since the pollutant existing forms that board wastewater is discharged with electroplating wastewater are different, processing method is also different, generally adopts
Take categorised collection, dual treatment.Currently, domestic use chemical precipitation method or chemical precipitation-ion-exchange mostly.In useization
During learning precipitation method progress solid- liquid separation, it is the settling velocity of accelerating solid, reduces the moisture content of sludge, must usually add
Add a certain amount of flocculant.
Flocculence is to use a kind of more universal water process mode both at home and abroad due to its simple process, economy.It is common
Flocculant, such as poly-ferric chloride, polyaluminium sulfate, bodied ferric sulfate, aluminum sulfate, ferric sulfate, aluminium chloride and iron chloride.?
During board wastewater coagulating kinetics, there is the place that has much room for improvement in traditional coagulant: such as aluminum sulfate, in water temperature
When low, hydrolysis is difficult, and loosely, coagulation effect is deteriorated the floccule body of formation, and crude aluminum sulfate is due to insoluble impurities content
Height, waste residue is more when use, and acidity is higher, and corrosivity is stronger；Ferric trichloride, solid product easily absorb water deliquescence, are not easy to take care of,
Corrosivity is stronger, and it is relatively narrow most preferably to add range, is difficult to control.
In addition, usually containing time phosphorus and burnt phosphorus in electroplating wastewater, during processing is containing time phosphorus and burnt phosphorus waste water usually
It is oxidized using advanced oxidation processes after being positive phosphorus and is removed again, the process is complex, and processing cost is high.
Summary of the invention
In order to overcome the deficiencies of the prior art, the present invention propose a kind of efficient removing heavy metals, the organic coagulants of dephosphorization can
Efficiently the heavy metal and phosphorus in removal board wastewater, the present invention also propose preparation method and the user of the organic coagulants
Method, preparation manipulation is simple, using easy control of process conditions, greatly reduces cost of sewage disposal.
The present invention proposes the organic coagulants of a kind of efficient removing heavy metals, dephosphorization, by mass percentage, comprising with the following group
Point: the organic polymer coargulator of 18%-25%, the aluminium polychloride of 13%-18%, the ferrous ion chemical combination of 3%-8%
Object, the diatomite of 1%-5%, the rare earth metal of 0.1%-1%, the water of surplus.
Further, the ferrous ion compound is ferrous sulfate or frerrous chloride.
Further, the diatomite is nano silicone diatomaceous earth, partial size 70-130nm, wherein SiO2Content >=
75%, Fe2O3≤ 1.5%, and its specific surface area >=30m2/g。
Further, the organic polymer coargulator is chitosan class flocculant.
Further, the partial size of the rare earth metal is 80-130mn.
A kind of above-mentioned efficient removing heavy metals, dephosphorization organic coagulants preparation method, comprising the following steps:
Step 1: taking aluminium polychloride to be configured to aqueous solution, and polymeric aluminum chlorides solution is added in ferrous ion compound
In be sufficiently mixed, obtain Ar ion mixing liquid；
Step 2: diatomite, organic polymer coargulator and rare earth metal are added in the Ar ion mixing liquid and are stirred
Uniformly, organic coagulants are made.
A kind of above-mentioned efficient removing heavy metals, dephosphorization organic coagulants application method, add under conditions of pH=7-8
Add use, dosage accounts for the 0.8 ‰ -2.0 ‰ of the volume for the sewage to be handled.
Beneficial effects of the present invention:
The present invention passes through organic polymer coargulator, aluminium polychloride, ferrous ion compound, diatomite and rare earth gold
The organic coagulants that the compounding of category obtains, use under alkaline condition, can efficiently remove heavy metal in sewage and phosphorus is (secondary
Phosphorus, burnt phosphorus, positive phosphorus): the removal rate of phosphorus reaches as high as 99% or more, and cooperation vulcanized sodium is reached as high as using the removal rate of heavy metal
99.9% or more.
Specific embodiment
As follows in conjunction with specific embodiments, application scheme is further described:
Embodiment one
A kind of efficient removing heavy metals, dephosphorization organic coagulants include by mass percentage following components: 18.32%
Chitosan class flocculant, 13.19% aluminium polychloride, 3.30% ferrous sulfate, 4.40% nano silicone diatomaceous earth,
0.73% rare earth metal, the water of surplus.
Wherein, the partial size of the nano silicone diatomaceous earth is 70-130mn, wherein SiO2Content >=75%, Fe2O3≤
1.5%, and its specific surface area >=30m2/g.The partial size of the rare earth metal is 80-130nm.
A kind of above-mentioned efficient removing heavy metals, dephosphorization organic coagulants preparation method, comprising the following steps:
Step 1: 100g polymeric aluminum chlorides solution (content of aluminium polychloride is 18%) is taken, 4.5g ferrous sulfate is added
Solid is sufficiently mixed, and obtains Ar ion mixing liquid；
Step 2: it takes 1g rare earth metal and 25g chitosan class flocculant to be added in Ar ion mixing liquid and stirs；
Step 3: 6g nano silicone diatomaceous earth is taken to be added in above-mentioned mixed liquor, stirring while adding, gained colloid mixed liquor is
Organic coagulants.
Take board wastewater 1000mL, do flocculating experiment at 25 DEG C of room temperature, with sodium hydroxide solution adjust wastewater pH to
7-8 adds the organic flocculant (dosage of vulcanized sodium (dosage 0.75g/L) and above-mentioned efficient removing heavy metals, dephosphorization
For 1mL), 2min is quickly stirred, is then allowed to stand and places 30min.Supernatant is taken, pH to 8 is adjusted again, adds vulcanized sodium and (add
Amount is the organic flocculant (dosage 0.5mL) of 0.25g/L) and above-mentioned efficient removing heavy metals, dephosphorization, is quickly stirred
2min is then allowed to stand and places 60min, and supernatant is to be discharged, and supernatant is taken to be detected.
Testing result are as follows: upper liquid clarification, the copper content of board wastewater are down to 0-0.05mg/ by 172-268mg/L
The removal rate of L, copper ion are greater than 99.9%.
Embodiment two
A kind of efficient removing heavy metals, dephosphorization organic coagulants include by mass percentage following components: 21.92%
Chitosan class flocculant, 15.75% aluminium polychloride, 6.85% ferrous sulfate, 2.19% nano silicone diatomaceous earth,
0.55% rare earth metal, the water of surplus.
Wherein, the partial size of the nano silicone diatomaceous earth is 70-130nm, wherein SiO2Content >=75%, Fe2O3≤
1.5%, and its specific surface area >=30m2/g.The partial size of the rare earth metal is 80-130nm.
A kind of above-mentioned efficient removing heavy metals, dephosphorization organic coagulants preparation method, comprising the following steps:
Step 1: 100g polymeric aluminum chlorides solution (content of aluminium polychloride is 23%) is taken, it is solid that 10g frerrous chloride is added
Body is sufficiently mixed, and obtains Ar ion mixing liquid；
Step 2: it takes 0.8g rare earth metal 32g chitosan class flocculant to be added in Ar ion mixing liquid and stirs；
Step 3: 3.2g nano silicone diatomaceous earth is taken to be added in above-mentioned mixed liquor, stirring while adding, gained colloid mixed liquor is
For organic coagulants.
Electroplating wastewater 1000mL is taken, does flocculating experiment at 25 DEG C of room temperature, adjusts wastewater pH to 8 with calcium hydroxide solution,
The organic flocculant for adding the above-mentioned efficient removing heavy metals of 2mL, dephosphorization quickly stirs 2min, stands and places 60min.
Test result: effect of settling is good, and upper liquid clarification, the phosphorus content of electroplating wastewater is by 80-150mg/L (secondary phosphorus etc.
Non- positive phosphorus accounts for 80% of total phosphorus or so) it is down to 0.2-0.56mg/L, the removal rate of total phosphorus is greater than 99%.
It is that above-mentioned preferred embodiment should be regarded as application scheme embodiment for example, all with application scheme thunder
Same, approximate or technology deduction, replacement, improvement for making based on this etc., are regarded as the protection scope of this patent.
Claims (7)
1. the organic coagulants of a kind of efficient removing heavy metals, dephosphorization, which is characterized in that include following components by mass percentage:
The organic polymer coargulator of 18%-25%, the aluminium polychloride of 13%-18%, the ferrous ion compound of 3%-8%,
The diatomite of 1%-5%, the rare earth metal of 0.1%-1%, the water of surplus.
2. the organic coagulants of efficient removing heavy metals according to claim 1, dephosphorization, which is characterized in that the divalent
Ferric ion compounds are ferrous sulfate or frerrous chloride.
3. the organic coagulants of efficient removing heavy metals according to claim 1, dephosphorization, which is characterized in that the diatom
Soil is nano silicone diatomaceous earth, partial size 70-130nm, wherein SiO2Content >=75%, Fe2O3≤ 1.5%, and its specific surface area
≥30m2/g。
4. the organic coagulants of efficient removing heavy metals according to claim 1, dephosphorization, which is characterized in that described is organic
High polymer coagulant is chitosan class flocculant.
5. the organic coagulants of efficient removing heavy metals according to claim 1, dephosphorization, which is characterized in that the rare earth
The partial size of metal is 80-130nm.
6. a kind of described in any item efficient removing heavy metals of claim 1-5, dephosphorization organic coagulants preparation method, it is special
Sign is, comprising the following steps:
Step 1: taking aluminium polychloride to be configured to aqueous solution, and ferrous ion compound is added in polymeric aluminum chlorides solution and is filled
Divide mixing, obtains Ar ion mixing liquid；
Step 2: diatomite, organic polymer coargulator and rare earth metal being added in the Ar ion mixing liquid and stirred evenly,
Organic coagulants are made.
7. a kind of described in any item efficient removing heavy metals of claim 1-5, dephosphorization organic coagulants application method, it is special
Sign is, adds and uses under conditions of pH=7-8, and dosage accounts for the 0.8 ‰ -2.0 ‰ of the volume for the sewage to be handled.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811479079.5A CN109574173A (en) | 2018-12-04 | 2018-12-04 | Efficient removing heavy metals, the organic coagulants of dephosphorization and its preparation and application |
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| CN201811479079.5A CN109574173A (en) | 2018-12-04 | 2018-12-04 | Efficient removing heavy metals, the organic coagulants of dephosphorization and its preparation and application |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111644154A (en) * | 2020-05-28 | 2020-09-11 | 贵州民族大学 | Phosphorus removal material and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103663637A (en) * | 2013-11-27 | 2014-03-26 | 上海纳米技术及应用国家工程研究中心有限公司 | Complex bleaching flocculating agent used for metal plating wastewater and use method of complex bleaching flocculating agent |
| CN103922453A (en) * | 2014-05-14 | 2014-07-16 | 山东盛阳集团有限公司 | Flocculating agent for coking wastewater and preparation method thereof and application thereof |
| CN105366788A (en) * | 2015-10-30 | 2016-03-02 | 朱忠良 | Water purification agent composition and application thereof |
| CN107572639A (en) * | 2017-09-29 | 2018-01-12 | 中科海创环境科技（大连）有限公司 | A kind of coagulant suitable for coking wastewater processing system |
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2018
- 2018-12-04 CN CN201811479079.5A patent/CN109574173A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103663637A (en) * | 2013-11-27 | 2014-03-26 | 上海纳米技术及应用国家工程研究中心有限公司 | Complex bleaching flocculating agent used for metal plating wastewater and use method of complex bleaching flocculating agent |
| CN103922453A (en) * | 2014-05-14 | 2014-07-16 | 山东盛阳集团有限公司 | Flocculating agent for coking wastewater and preparation method thereof and application thereof |
| CN105366788A (en) * | 2015-10-30 | 2016-03-02 | 朱忠良 | Water purification agent composition and application thereof |
| CN107572639A (en) * | 2017-09-29 | 2018-01-12 | 中科海创环境科技（大连）有限公司 | A kind of coagulant suitable for coking wastewater processing system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111644154A (en) * | 2020-05-28 | 2020-09-11 | 贵州民族大学 | Phosphorus removal material and preparation method and application thereof |
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Application publication date: 20190405 |