CN107628711A - A kind of method of caustic soda processing lead waste water - Google Patents
A kind of method of caustic soda processing lead waste water Download PDFInfo
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- CN107628711A CN107628711A CN201711087396.8A CN201711087396A CN107628711A CN 107628711 A CN107628711 A CN 107628711A CN 201711087396 A CN201711087396 A CN 201711087396A CN 107628711 A CN107628711 A CN 107628711A
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- precipitating sludge
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Abstract
The present invention relates to a kind of method of caustic soda processing lead waste water, comprise the following steps：Lead waste water is put into stirring pool；Caustic soda is added into the stirring pool, and is stirred with electric blender；Obtained waste water is passed through in sedimentation basin and precipitated, is then filtered, obtains precipitating sludge；The precipitating sludge is placed in outdoor carry out natural air drying；Dried precipitating sludge is dissolved in dust technology, obtains primary solution；The primary solution is extracted, obtains extract；The extract is stripped, obtains strip liquor；The strip liquor is electrolysed, obtains metallic lead.Present invention process is simple, and reaction condition easily reaches, and reaction is also easy to control, and processing wastewater flow rate is big, and technological process is green, and energy consumption is small, it is easy to accomplish industrial-scale production.
Description
Technical field
The present invention relates to the field of Environment Protection of wastewater treatment, specially a kind of method of caustic soda processing lead waste water.
Background technology
As industry and other industry develop rapidly, a large amount of uses of lead, lead contamination is from occupational environment Xiang Shui, big
Gas, food, medicine and our everyday environments extend.Lead is that distribution is wide, has accumulative environmental contaminants.The property of lead
Stable, highly unwanted to human body heavy metal element, while also seriously endanger the health of children.
Lead and its compound can enter human body through alimentary canal, respiratory tract, and alkyl lead can also be absorbed by skin.Lead is in vivo
Long half time produces harm to many individual tracts and physiological action.Nervous system be lead poisoning effect target tissue, lead
With Behavioral teratogenicity.Lead in invasion body damages cerebellum and brain cortex cell, interference metabolism with blood flow such as brain tissue
Activity, cause anaemia and encephaledema.Anaemia is one of early symptom of lead poisoning, and lead can suppress many in ferroheme building-up process
The activity of enzyme；Lead poisoning, which can cause vasopasm, eilema, retinal arterioles spasm and hypertension, to be all arteriolar spasm
Cause, when often result in tiny artery sclerosis.It is small that the renal damage of lead often shows as the lesion kidney such as interstitial nephritis or atrophic ephritis
Pipe reabsorption function reduction is the symptom of early stage, and Effects of Lead Exposure can also affect on reproductive function, contacts woman worker's infertility, the miscarriage of lead
And stillborn foetus incidence increases, lead can be by placental metastasis to fetus with.Oral lead poisoning person's liver be main damaged organ it
One, hepatomegaly can be caused, yellow subcutaneous ulcer, or even cirrhosis or hepatonecrosis is presented.Hepatic lesion be also likely to be in liver arteriolar spasm cause
Caused by ischaemic.Lead causes arteriolar spasm to be due to porphyrin metabolism obstacle, suppress the enzyme of base containing coloured glaze, disturbs vegetative nerve.Lead
Main aspect to children's harm is the influence to children's brain growth.Research both domestic and external is all it has been found that dirty in lead
The more serious place of dye, the incidence of disease of children mental retardation are higher；The Pb-B of children often rises 100 μ g/L, its IQ
(IQ) 6~8 points are declined.Research it has also been found that, children blood lead it is too high also and children's hyperkinetic syndrome, absent minded, difficulty of learning,
Criminal offence after aggression and adult has substantial connection.The Physique growth of children is also influenceed by lead.According to the country
Outer research report, the children of high blood lead, its possibility increase of short and small stature.The stature of high blood lead children is often below normal
Children.In addition, serious children's lead poisoning also results in anaemia etc..
Lead in waste water is essentially from the exploitation of lead ore, smelting and industrial discharge, the tail gas of motor vehicle emission
The main source of Air Lead Pollution, it can also cause water pollution.When lead concentration is very high in water, the self-cleaning that can suppress water body is made
With.Lead contamination has caused the great attention of people to the significant damage that human body and environment are brought.Therefore, waste water deleading has been
Faced as every field urgent to topic.
The content of the invention
The shortcomings that for above-mentioned prior art, the present invention provide a kind of lead containing wastewater treatment method green, cost is low.
The present invention solves above-mentioned technical problem and uses following technical scheme：A kind of method of caustic soda processing lead waste water, bag
Include following steps：
(1) lead waste water is put into stirring pool；
(2) caustic soda is added into the stirring pool, and is stirred with electric blender；
(3) waste water that step (2) obtains is passed through in sedimentation basin and precipitated, then filtered, obtain precipitating sludge；
(4) precipitating sludge is placed in outdoor carry out natural air drying；
(5) dried precipitating sludge is dissolved in dust technology, obtains primary solution；
(6) primary solution is extracted, obtains extract；
(7) extract is stripped, obtains strip liquor；
(8) strip liquor is electrolysed, obtains metallic lead.
Preferably, the lead content of waste water described in step (1) is 50~100mg/L.
Preferably, it is slowly added to caustic soda in step (2).
Preferably, the purity of the caustic soda is more than 90%.
As further preferred, the sedimentation time is 8~12 hours in step (3).
Further, it is filtered into press filtration described in step (3).
Preferably, natural air drying described in step (4) to moisture is less than 0.1%.
Preferably, drying time is 5~6 days in step (4).
Preferably, extractant is di-2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester in step (6).
Preferably, back washing agent is dust technology in step (7).
The present invention has the following advantages that compared with prior art：Present invention process is simple, and reaction condition easily reaches, reaction
Also easy to control, processing wastewater flow rate is big；The present invention is using caustic soda processing pollutant effect is good, reaction is fast, and cost is low, and impurity content
It is low, new pollutant will not be brought when handling waste water, greatly reduces whole processing cost；By the way of natural air drying,
Can be with larger cost-effective, the present invention, further to improve the content of lead, then is contained with the high lead of hydrometallurgy electrolysis using extraction
The solution of amount, the purity of final metallic lead are very high；Present invention process flow is green, and energy consumption is small, it is easy to accomplish industrialization rule
Mould produces.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below
Specific embodiment is closed, the present invention is expanded on further.It should be appreciated that specific embodiment described herein is only explaining this hair
It is bright, it is not intended to limit the present invention.
Embodiment 1：
The lead waste water that lead content is 50mg/L is put into stirring pool, caustic soda is slowly added into the stirring pool,
Prevent from reacting too fast, the purity of caustic soda is more than 90%, and is stirred with electric blender.The waste water obtained after stirring is passed through
Precipitated in sedimentation basin, the sedimentation time is 8 hours, is then filtered, the mode of filtering is press filtration, obtains precipitating sludge.
The precipitating sludge is placed in outdoor carry out natural air drying, drying time is 5~6 days, and natural air drying to moisture is less than
0.1%.Then dried precipitating sludge is dissolved in dust technology, obtains primary solution；The primary solution is extracted,
Extractant is di-2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester, obtains extract；The extract is stripped again, is stripped
Agent is dust technology, obtains strip liquor；The strip liquor is electrolysed again, obtains high purity metal lead.
Embodiment 2：
The lead waste water that lead content is 80mg/L is put into stirring pool, caustic soda is slowly added into the stirring pool,
The purity of caustic soda is more than 90%, and is stirred with electric blender.The waste water obtained after stirring is passed through in sedimentation basin and carried out
Precipitation, sedimentation time are 10 hours, are then filtered, the mode of filtering is press filtration, obtains precipitating sludge.The precipitation is dirty
Mud is placed in outdoor carry out natural air drying, and drying time is 5~6 days, and natural air drying to moisture is less than 0.1%.Then will be dry
Precipitating sludge after dry is dissolved in dust technology, obtains primary solution；The primary solution is extracted, extractant is 2- second
Base hexyl phosphonic acids single 2-ethyl hexyl ester, obtains extract；The extract is stripped again, back washing agent is dust technology, is obtained
To strip liquor；The strip liquor is electrolysed again, obtains high purity metal lead.
Embodiment 3：
The lead waste water that lead content is 100mg/L is put into stirring pool, caustic soda is slowly added into the stirring pool,
The purity of caustic soda is more than 90%, and is stirred with electric blender.The waste water obtained after stirring is passed through in sedimentation basin and carried out
Precipitation, sedimentation time are 12 hours, are then filtered, the mode of filtering is press filtration, obtains precipitating sludge.The precipitation is dirty
Mud is placed in outdoor carry out natural air drying, and drying time is 5~6 days, and natural air drying to moisture is less than 0.1%.Then will be dry
Precipitating sludge after dry is dissolved in dust technology, obtains primary solution；The primary solution is extracted, extractant is 2- second
Base hexyl phosphonic acids single 2-ethyl hexyl ester, obtains extract；The extract is stripped again, back washing agent is dust technology, is obtained
To strip liquor；The strip liquor is electrolysed again, obtains high purity metal lead.
Embodiment 4：
The lead waste water that lead content is 90mg/L is put into stirring pool, caustic soda is slowly added into the stirring pool,
The purity of caustic soda is more than 90%, and is stirred with electric blender.The waste water obtained after stirring is passed through in sedimentation basin and carried out
Precipitation, sedimentation time are 12 hours, are then filtered, the mode of filtering is press filtration, obtains precipitating sludge.The precipitation is dirty
Mud is placed in outdoor carry out natural air drying, and drying time is 5~6 days, and natural air drying to moisture is less than 0.1%.Then will be dry
Precipitating sludge after dry is dissolved in dust technology, obtains primary solution；The primary solution is extracted, extractant is 2- second
Base hexyl phosphonic acids single 2-ethyl hexyl ester, obtains extract；The extract is stripped again, back washing agent is dust technology, is obtained
To strip liquor；The strip liquor is electrolysed again, obtains high purity metal lead.
Embodiment 5：
The lead waste water that lead content is 60mg/L is put into stirring pool, caustic soda is slowly added into the stirring pool,
The purity of caustic soda is more than 90%, and is stirred with electric blender.The waste water obtained after stirring is passed through in sedimentation basin and carried out
Precipitation, sedimentation time are 12 hours, are then filtered, the mode of filtering is press filtration, obtains precipitating sludge.The precipitation is dirty
Mud is placed in outdoor carry out natural air drying, and drying time is 5~6 days, and natural air drying to moisture is less than 0.1%.Then will be dry
Precipitating sludge after dry is dissolved in dust technology, obtains primary solution；The primary solution is extracted, extractant is 2- second
Base hexyl phosphonic acids single 2-ethyl hexyl ester, obtains extract；The extract is stripped again, back washing agent is dust technology, is obtained
To strip liquor；The strip liquor is electrolysed again, obtains high purity metal lead.
In the present invention, the natural air drying optional sunlight preferable time is short, and such effect is more preferable, greatly reduces
Cost, present invention process is simple, and reaction condition easily reaches, and reaction is also easy to control, and processing wastewater flow rate is big, technological process green ring
Protect, energy consumption is small, it is easy to accomplish industrial-scale production.
The general principle and principal character and advantages of the present invention of the present invention, the technology of the industry has been shown and described above
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention, the claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. a kind of method of caustic soda processing lead waste water, comprises the following steps：
(1) lead waste water is put into stirring pool；
(2) caustic soda is added into the stirring pool, and is stirred with electric blender；
(3) waste water that step (2) obtains is passed through in sedimentation basin and precipitated, then filtered, obtain precipitating sludge；
(4) precipitating sludge is placed in outdoor carry out natural air drying；
(5) dried precipitating sludge is dissolved in dust technology, obtains primary solution；
(6) primary solution is extracted, obtains extract；
(7) extract is stripped, obtains strip liquor；
(8) strip liquor is electrolysed, obtains metallic lead.
2. according to the method for claim 1, the lead content of waste water described in step (1) is 50~100mg/L.
3. according to the method for claim 1, step is slowly added to caustic soda in (2).
4. according to the method for claim 3, the purity of the caustic soda is more than 90%.
5. according to the method for claim 1, the sedimentation time is 8~12 hours in step (3).
6. method according to claim 1 or 5, step is filtered into press filtration described in (3).
7. according to the method for claim 1, natural air drying described in step (4) to moisture is less than 0.1%.
8. the method according to claim 1 or 7, drying time is 5~6 days in step (4).
9. according to the method for claim 1, extractant is 2- ethylhexyl phosphonic acid mono 2- ethylhexyls in step (6)
Ester.
10. according to the method for claim 1, back washing agent is dust technology in step (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711087396.8A CN107628711A (en) | 2017-11-07 | 2017-11-07 | A kind of method of caustic soda processing lead waste water |
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| CN201711087396.8A CN107628711A (en) | 2017-11-07 | 2017-11-07 | A kind of method of caustic soda processing lead waste water |
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| CN107628711A true CN107628711A (en) | 2018-01-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111519214A (en) * | 2020-06-09 | 2020-08-11 | 内蒙古兴安银铅冶炼有限公司 | Lead electrolyte purification process |
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| CN1737172A (en) * | 2005-08-29 | 2006-02-22 | 陈秀恋 | Device for removing lead and recycling lead from lead-polluted soil and lead containg waste water |
| CN103290225A (en) * | 2013-06-20 | 2013-09-11 | 长沙华明复合材料科技有限公司 | Method for recovering lead from lead-containing solid wastes |
| CN103466843A (en) * | 2013-10-08 | 2013-12-25 | 宜兴市欧瑞特环保科技有限公司 | Technology and device for treating heavy metal ion wastewater |
| CN103539232A (en) * | 2013-10-30 | 2014-01-29 | 北京师范大学 | Fluidized bed type three-phase electrode reactor and method for treating high-concentration organic wastewater by using reactor |
| CN103601353A (en) * | 2013-12-11 | 2014-02-26 | 重庆远达水务有限公司 | Method for removing heavy metals in municipal sludge |
| CN103723859A (en) * | 2013-12-23 | 2014-04-16 | 南京工程学院 | Method for efficiently removing lead ions and cadmium ions in reverse-osmosis concentrated water |
| CN103936190A (en) * | 2014-04-02 | 2014-07-23 | 超威电源有限公司 | Barium hydroxide treatment method with zero discharging of lead-acid storage battery wastewater |
-
2017
- 2017-11-07 CN CN201711087396.8A patent/CN107628711A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1737172A (en) * | 2005-08-29 | 2006-02-22 | 陈秀恋 | Device for removing lead and recycling lead from lead-polluted soil and lead containg waste water |
| CN103290225A (en) * | 2013-06-20 | 2013-09-11 | 长沙华明复合材料科技有限公司 | Method for recovering lead from lead-containing solid wastes |
| CN103466843A (en) * | 2013-10-08 | 2013-12-25 | 宜兴市欧瑞特环保科技有限公司 | Technology and device for treating heavy metal ion wastewater |
| CN103539232A (en) * | 2013-10-30 | 2014-01-29 | 北京师范大学 | Fluidized bed type three-phase electrode reactor and method for treating high-concentration organic wastewater by using reactor |
| CN103601353A (en) * | 2013-12-11 | 2014-02-26 | 重庆远达水务有限公司 | Method for removing heavy metals in municipal sludge |
| CN103723859A (en) * | 2013-12-23 | 2014-04-16 | 南京工程学院 | Method for efficiently removing lead ions and cadmium ions in reverse-osmosis concentrated water |
| CN103936190A (en) * | 2014-04-02 | 2014-07-23 | 超威电源有限公司 | Barium hydroxide treatment method with zero discharging of lead-acid storage battery wastewater |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111519214A (en) * | 2020-06-09 | 2020-08-11 | 内蒙古兴安银铅冶炼有限公司 | Lead electrolyte purification process |
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Application publication date: 20180126 |