CN106746011A - The processing method of heavy metal-containing waste water - Google Patents
The processing method of heavy metal-containing waste water Download PDFInfo
- Publication number
- CN106746011A CN106746011A CN201611263479.3A CN201611263479A CN106746011A CN 106746011 A CN106746011 A CN 106746011A CN 201611263479 A CN201611263479 A CN 201611263479A CN 106746011 A CN106746011 A CN 106746011A
- Authority
- CN
- China
- Prior art keywords
- waste water
- heavy metal
- heavy
- thioacetamide
- processing method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The processing method of the heavy metal-containing waste water that the present invention is introduced is provided under nucleating condition in removing heavy-metal slag, and the heavy metal in precipitating reagent precipitation waste water is made with thioacetamide and vulcanized sodium.Waste water energy stably reaching standard discharge after treatment.
Description
Technical field
The present invention relates to a kind of processing method of heavy metal-containing waste water.
Background technology
Heavy metal is important industrial raw materials, can be produced in its extraction, chemicals production and use useless containing heavy metal
Water.The toxicity of heavy metal is very big.If heavy metal-containing waste water is not processed and enters environment, it will cause Heavy environmental pollution.Contain at present
The processing method of heavy metal wastewater thereby mainly has chemical precipitation method, absorption method and membrane separation process etc..Wherein chemical precipitation method due into
This is low, most widely used.Because the level of clean production for relating to heavy metal industry is generally improved, the heavy metal concentration in waste water is also got over
Come lower（A few mg/litre~tens mg/litres）, thereby result in chemical precipitation method generation sediment it is very thin, the also generation having
Colloidal substance, separation of solid and liquid is difficult, the waste water after treatment is difficult to stably reaching standard and discharges.Exploitation heavy metals removal effect is good, behaviour
The processing method for making the heavy metal-containing waste water that simple, removing heavy-metal slag is easily processed has larger practical value.
The content of the invention
For the problem that current heavy metal-containing wastewater treatment is present, the purpose of the present invention is to find heavy metals removal effect
The processing method of the heavy metal-containing waste water that good, simple to operate, removing heavy-metal slag is easily processed, it is characterised in that by cupric, lead,
At least one of zinc, cadmium, nickel and cobalt heavy metal, and be free of the waste water feeding reactor of cyanogen and organic complexing agent.Add a de- huge sum of money
Category slag, every cubic metre of waste water adds the amount of removing heavy-metal slag to be calculated as 500g~1500g with butt.After stirring, waste water is adjusted
PH value to 6~8.Hereafter while adding thioacetamide and vulcanized sodium, the addition of thioacetamide and vulcanized sodium is respectively
By 3%~5% and 100%~110% of theoretical amount needed for whole heavy metal reaction generation sulfide in waste water.After the completion of charging,
Stirring reaction 30min~60min under normal temperature, stirring intensity is 30 r/min~120 r/min.Precipitation reaction terminate after waste water
1.0h~3.0h is precipitated into sedimentation basin.The supernatant qualified discharge of sedimentation basin.Irregularly sediment is extracted out from sedimentation basin to enter
Row filtering, filtrate Returning reactor, filter residue（Removing heavy-metal slag）Part Returning reactor, remainder comprehensive utilization, or press
The associated specifications of dangerous disposition of solid waste are disposed.
The object of the present invention is achieved like this, after heavy metal-containing waste water adds thioacetamide and vulcanized sodium, main hair
Raw following reaction：
CH3CSNH2 + H2O + Me2+ = CH3CONH2 + MeS +2H+
Me2++ Na2S = MeS + 2Na+
Me represents heavy metal in formula.
By above-mentioned series reaction, the heavy metal in solution is removed in the form of MeS precipitations, reaches waste water removal weight
The purpose of metal.
The core of this method is that the return of removing heavy-metal slag part is used, there is provided MeS good nucleating condition, it is to avoid generation is difficult
The fine grained MeS of precipitation；It is used in conjunction with thioacetamide and vulcanized sodium makees precipitating reagent, can both ensures the removal effect of heavy metal,
The generation of colloidal substance can be avoided again, thus improves the precipitation and separation of solid and liquid performance of MeS, it is ensured that the waste water stabilization after treatment reaches
Mark discharge.
Experiment shows：When waste water of the heavy metal concentration less than 20mg/L is processed, under equal conditions, a de- huge sum of money is added without
Category slag, about 20% or so, precipitate poor performance, processed waste water can not be up to standard for sediment of the particle diameter less than 1 micron
Discharge；After adding removing heavy-metal slag.The particle diameter of sediment is all higher than 1 micron, and precipitate performance is good, the waste water energy after treatment
Stably reaching standard is discharged.
Experiment shows：When the waste water that heavy metal concentration is 20mg/L is processed, thioacetamide is used alone, even if it adds
It is the 300% of theoretical amount to enter amount, and the concentration of the heavy metal in solution is still above 8mg/L；When vulcanized sodium is used alone, generation
Contain a large amount of colloidal substances in slag, it is difficult to carry out separation of solid and liquid；When both are used in combination, both can depth remove removing heavy metals, sink
The precipitation and strainability of starch are also fine.
Relative to existing method, the present invention makees " nucleator ", substantially improves the precipitation bar of MeS using removing heavy-metal slag
Part, significantly increases the particle diameter of these sediments；It is used in conjunction with thioacetamide and vulcanized sodium makees precipitating reagent, can have both ensured a huge sum of money
The removal effect of category, can avoid the generation of colloidal substance again, and MeS energy rapid precipitations in sedimentation basin, sediment strainability is good
It is good, so that ensure the waste water stably reaching standard discharge after treatment, with obvious economic benefit and environmental benefit.
Specific implementation method
Embodiment 1：Treatment Zinc Hydrometallurgy Residue waste water 50L（Composition：Zn25.2mg/L、Cu2.3mg/L、Cd1.4mg/L、
Pb1.8mg/L、pH5.2）.Treatment conditions：Every liter of waste water adds adding for removing heavy-metal slag 1000mg, thioacetamide and vulcanized sodium
Enter amount respectively theoretical amount 3% and 105%, precipitation reaction time 30min, pH6, mixing speed 70r/min, the sedimentation time
1.0h.Waste component after treatment is：Zn0.12mg/L、Cu0.15mg/L、Cd0.015mg/L、Pb0.31mg/L、pH6.8.
Embodiment 2：Treatment electrolysis Plante-type plate washes 20L（Composition：Pb27.3mg/L、 Zn5.8mg/L、Cu3.1mg/
L, Cd0.8mg/L, pH2.2,）.Treatment conditions：Every liter of waste water adds removing heavy-metal slag 500mg, thioacetamide and vulcanized sodium
Addition be respectively theoretical amount 5% and 100%, precipitation reaction time 45min, pH6.5, mixing speed 80r/min, the sedimentation time
1.5h.Waste component after treatment is：Zn0.25mg/L、Cu0.20mg/L、Cd0.012mg/L、Pb0.35mg/L、pH7.2.
Embodiment 3：Treatment wet method nickel metallurgy slag waste water 50L（Composition：Cu4.7mg/L、Ni18.5mg/L、Co2.1mg/L、
pH4.9）.Treatment conditions：Every liter of waste water adds the addition of removing heavy-metal slag 1200mg, thioacetamide and vulcanized sodium to be respectively
The 4% of theoretical amount and 110%, precipitation reaction time 50min, pH6.5, mixing speed 30r/min, sedimentation time 1.0h.After treatment
Waste component be：Cu0.25mg/L、Ni0.47mg/L、Co0.21mg/L、pH7.5.
Claims (1)
1. a kind of processing method of heavy metal-containing waste water, it is characterised in that by least one of cupric, lead, zinc, cadmium, nickel and cobalt
Heavy metal, and the waste water feeding reactor of cyanogen and organic complexing agent is free of, add removing heavy-metal slag, every cubic metre of waste water to add and take off
The amount of heavy metal slag is calculated as 500g~1500g with butt, after stirring, adjusts the pH value of waste water to 6~8, hereafter adds simultaneously
Enter thioacetamide and vulcanized sodium, the addition of thioacetamide and vulcanized sodium is respectively whole heavy metal reaction lifes in waste water
3%~5% of theoretical amount needed for sulphidisation and 100%~110%, after the completion of charging, at normal temperatures stirring reaction 30min~
60min, stirring intensity be 30 r/min~120 r/min, precipitation reaction terminate after waste water enter sedimentation basin precipitation 1.0h~
3.0h, the supernatant qualified discharge of sedimentation basin is irregularly extracted sediment out from sedimentation basin and is filtered, and filtrate returns to reaction
Device, filter residue part Returning reactor, remainder comprehensive utilization, or by the associated specifications of dangerous disposition of solid waste
It is disposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611263479.3A CN106746011A (en) | 2016-12-30 | 2016-12-30 | The processing method of heavy metal-containing waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611263479.3A CN106746011A (en) | 2016-12-30 | 2016-12-30 | The processing method of heavy metal-containing waste water |
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| CN106746011A true CN106746011A (en) | 2017-05-31 |
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| CN201611263479.3A Pending CN106746011A (en) | 2016-12-30 | 2016-12-30 | The processing method of heavy metal-containing waste water |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107841622A (en) * | 2017-11-10 | 2018-03-27 | 陈鹏 | A kind of method of cyanidation tailings comprehensive utilization and harmless treatment |
| CN108046469A (en) * | 2017-12-14 | 2018-05-18 | 佛山市中环环境检测中心 | A kind of electro-plating waste disposal plant |
| CN108059272A (en) * | 2017-12-14 | 2018-05-22 | 佛山市中环环境检测中心 | A kind of leaded vanadium effluent treatment plant |
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2016
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| CN1548381A (en) * | 2003-05-08 | 2004-11-24 | 财团法人工业技术研究院 | Method of removing As from water |
| CN201971689U (en) * | 2011-01-18 | 2011-09-14 | 清华大学 | Device for removing and recovering heavy metal by crystallization |
| CN103011439A (en) * | 2011-09-20 | 2013-04-03 | 无锡尚德太阳能电力有限公司 | Cadmium-containing wastewater treatment method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107841622A (en) * | 2017-11-10 | 2018-03-27 | 陈鹏 | A kind of method of cyanidation tailings comprehensive utilization and harmless treatment |
| CN108046469A (en) * | 2017-12-14 | 2018-05-18 | 佛山市中环环境检测中心 | A kind of electro-plating waste disposal plant |
| CN108059272A (en) * | 2017-12-14 | 2018-05-22 | 佛山市中环环境检测中心 | A kind of leaded vanadium effluent treatment plant |
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Application publication date: 20170531 |