CN107352680A - A kind of method that Battery Plant's heavy metal ions in wastewater is thoroughly removed using water based foam system - Google Patents
A kind of method that Battery Plant's heavy metal ions in wastewater is thoroughly removed using water based foam system Download PDFInfo
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- CN107352680A CN107352680A CN201710576845.9A CN201710576845A CN107352680A CN 107352680 A CN107352680 A CN 107352680A CN 201710576845 A CN201710576845 A CN 201710576845A CN 107352680 A CN107352680 A CN 107352680A
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- heavy metal
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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
- C02F9/00—Multistage 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—Heavy metal 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- 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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The present invention relates to a kind of method that Battery Plant's heavy metal ions in wastewater is thoroughly removed using water based foam system, this method includes：The pH for adjusting waste water is 4 11, and surfactant solution is added into waste water, the mol ratio of surfactant and all heavy metal ion total mole numbers in waste water is proper proportion and is stirred；Foregoing mixed liquor is introduced into foam processor, foamed gas are passed through with certain gas flow rate through quartzy core in foam processor bottom, the foam of generation is introduced into foam trap the recycling for carrying out defoaming and heavy metal by foam processor top duct, until non-foam produces.The measure of concentration of heavy metal ion is carried out to the water after processing, the clearance of this method heavy metal ion can reach more than 99%.Secondary pollution is not caused to water body, contaminated waste water is reached the effect of thorough heavy-metal ion removal.
Description
Technical field
The present invention relates to a kind of method that Battery Plant's heavy metal ions in wastewater is thoroughly removed using water based foam system, category
In Environmental Chemistry technical field.
Background technology
With the fast development of economy, domestic and international water pollution is on the rise, wherein, the pollution sources Battery Plant containing heavy metal
Water resource is caused greatly to destroy for waste water and pollution, while influences pole to agricultural, industry, human lives and the whole ecological balance
Greatly.Battery Plant's waste water, which not only dissipates, derives soil and atmosphere pollution, and can seriously endanger animals and humans by food chain
Life and health.Waste water main source in battery production, which has in the waste water of production line for manufacturing battery cleaning slurry, allotment slurry, to be spilt leakage
Medicament waste water, cleaning produce the waste water on ground etc., contain substantial amounts of Pb2+,Zn2+,Mn2+,Hg2+Etc. heavy metal ion.These huge sum of moneys
Category ion will not be weakened or be disappeared by biodegradable and biological chain circulation, be enriched with put easily in biological chain on the contrary
Greatly, it is present in for a long time in organism, and the toxicity of heavy metal is larger, therefore the existence to the mankind is healthy and Environmental security causes
Serious influence, harm are very big.Therefore, efficient quick pollution control of water, the particularly improvement to Battery Plant's pollutant effluents, tool
There are important environmental effect and far-reaching social effect.
The control measures of heavy metal pollution can be largely classified into Physical, chemical method, life by its mechanism of action in water at present
Thing method etc..Physical includes extraction, absorption method, ion-exchange, UF membrane etc., the heavy metal ion in waste water is not changed
Adsorbed, concentrated, separated under chemical form；Such method efficiency high, but Meteorological height be present, quantities is big, is easily introduced
The shortcomings of pollution source.Bioanalysis is mainly made a return journey in depollution water body by the absorption enrichment of plant, microorganism
Heavy metal ion, but because its action period is grown, treating capacity is small, the plant treatment difficulty after heavy metal ion is adsorbed, to metal
The recovery utilization rate of ion is low to wait short slab also to govern its popularization in commercial Application.Chemical method generally by additive with
The effect heavy-metal ion removals such as heavy metal ion generation oxidation, reduction, precipitation, absorption, suppression, wherein the precipitation method are because of economy
It is good, applied widely, turn into and most processing methods is applied in Battery Plant's wastewater treatment, by adding hydroxide, sulfide
And have the chelating agent or complex compound of stronger combination with heavy metal ion, form not soluble in water sink with heavy metal ion
Form sediment, and then the purpose of purifying water body.But for the industrial wastewater of complicated component, because each ion precipitation scope is different, often
Need repeatedly to adjust pH or repeatedly add different types of agent in batches, not only complex operation, and inefficient, sink
The processing of starch is there is also difficulty, if dealing with improperly, easy reactivation, can cause secondary pollution, it is difficult to reach national discharge
Standard.
The content of the invention
In view of the shortcomings of the prior art, the present invention is provided one kind and thoroughly removed in Battery Plant's waste water using water based foam system
The method of heavy metal ion.The present invention forms water base foam using green specific surfactant, and the surface of selection is lived
Property agent and Pb2+, Zn2+It is positive with metal with electrically interaction or complexing, surfactant molecule etc. between heavy metal ion
After ion is combined closely, using the amphipathic absorption of surfactant on gas-liquid interface, by the bubble of floating by heavy metal
Ion takes polluted-water out of.The present invention is simple to operate, and cost is cheap, and surfactant concentration is low, to Battery Plant's waste water
Complexity is adaptable, and removal efficiency is high, suitable for the removal of contents of many kinds of heavy metal ion, and passes through preferred environmental type
Surfactant, it is ensured that do not have secondary pollution to environment.
Technical scheme is as follows：
A kind of method that Battery Plant's heavy metal ions in wastewater is thoroughly removed using water based foam system, including step is such as
Under：
(1) pH for adjusting waste water is 4-11, and the surfactant solution prepared in advance, surface-active are added into waste water
The addition of agent solution makes the mol ratio of surfactant and all heavy metal ion total mole numbers in waste water be (1~50):1,
Stir；
(2) mixed liquor that step (1) obtains is introduced into foam processor, foaming gas is passed through in foam processor bottom
Body, the control of foamed gas air velocity introduce foam in 0.1~1.0L/min, generation foam by foam processor top duct
Defoaming and the recycling of heavy metal are carried out in collector, until non-foam produces.
According to currently preferred, the surfactant described in step (1) is at least to contain an electronegative polarity
Hydrophilic radical, the surfactant that hydrophobic group carbon chain lengths are 8-24, described negatively charged polar hydrophilic group are sulfate, sulphur
Acidic group or carboxylic acid group.
It is further preferred that described surfactant also contains EO, carbonyl or amide group.
According to currently preferred, described surfactant be alkyl sulfate, fatty alcohol polyoxyethylene ether sulfate,
Alkyl carboxylate or the one of which in alkyl, polyether carboxylate or two or more any mixing.
It is further preferred that the surfactant containing sulfate is lauryl sodium sulfate or AEO
Sodium sulphate.
It is further preferred that the surfactant containing carboxylic acid group is sodium laurate or trideceth -4-
Carboxylic acid sodium.
According to currently preferred, surfactant and all heavy metal ion total mole numbers in waste water in step (1)
Mol ratio is (1~30):1, it is preferred that the mol ratio of surfactant and all heavy metal ion total mole numbers in waste water is (3
~15):1, highly preferred, the mol ratio of surfactant and all heavy metal ion total mole numbers in waste water is (5~7):
1。
According to currently preferred, the pH of waste water is 5-11 in step (1).
According to currently preferred, foamed gas air velocity is 0.1~0.7L/min in step (2), further preferably
, foamed gas air velocity is 0.2~0.6L/min.
According to currently preferred, foamed gas are N in step (2)2Or air.
According to currently preferred, the underfill of foam processor has porous media quartz sand, porous Jie in step (2)
Matter quartz sand porosity is 35-45%, and average pore throat radius is 0.1-10 μm, packed height 4-7mm.
For percentage of batteries factory heavy metals ion concentration greatly or mixed liquor be in highly acid situation, carry out foam
First waste water can be pre-processed before separation, i.e., adjust the pH of waste water to weak acid or neutrality by adding appropriate aqueous slkali, and
To caused precipitation filtering.It need not be pre-processed if waste water is without features described above.It is divided after being disposed using NITRATE BY FLAME ATOMIC
Photometer carries out the measure of concentration of heavy metal ion to remaining water body, calculates the removal efficiency of heavy metal ion.
The method detailed process that the present invention removes Battery Plant's heavy metal ions in wastewater using water base foam is summarized as follows：
Collect the species and content of wastewater sample analysis wherein heavy metal element, then according to the heavy metal in waste water from
The mol ratio of son is (1~50):1 ratio, and wanted with the mixed overall molar concentration of waste water for (1~15) mmol/L
Ask, weighing surfactant is some, mixes with appropriate pure water, in the case of 25~40 DEG C of constant temperature, stirs, and forms surface
Activator solution, after inorganic agent added into waste water, be suitably uniformly mixed.Then mixed liquor is introduced into foam processor, together
When gas is introduced from foam processor, air velocity is controlled in 0.1~1.0L/min using gas flowmeter, at foam
The drainage system on reason device top is introduced a foam into foam trap, carries out defoaming and the recovery of heavy metal.Gas is persistently injected,
Untill non-foam produces.
The principle of the present invention：
The present invention uses and Pb2+, Zn2+Etc. the specific surfactant between heavy metal ion with interaction, surface is lived
Property agent molecule is combined closely in aqueous with metal cation, after introducing a gas into solution, due to the amphiphilic of surfactant
Property will adsorb on the gas-liquid interface of bubble, being floated by density variation to form foam, takes heavy metal ion out of polluted-water.
Advantages of the present invention is as follows：
1st, method of the invention can thoroughly remove the Pb being enriched with Battery Plant's waste water2+, Zn2+Etc. heavy metal ion, quickly
Efficiently, input is low, and power consumption is few, and operation is simple.
2nd, the inventive method is in processing Pb2+, Zn2+Application in terms of the Battery Plant's waste water polluted etc. heavy metal ion, surface
Activating agent dosage is few, removal of heavy metal ions efficiency high, to Pb in waste water2+、Zn2+Removal efficiency can reach 99.8 with
Upper %, does not cause secondary pollution to water body, reaches the effect of thorough heavy-metal ion removal.
3rd, method of the invention, the various Battery Plant's waste water polluted by heavy metal ion are may be directly applied to, reaches preferable
Removal efficiency, meet discharging standards.
4th, method of the invention, departs from the foam of aqueous phase, and after processing, heavy metal element can reclaim, while surface is lived
Property agent can also recycle.
By carrying out the measure of concentration of heavy metal ion to water body before and after the processing, removal efficiency is calculated.Removal efficiency η=
(C1-C2)/C1, wherein C1It is the concentration of before processing heavy metal ion, C2It is the concentration that foaming terminates rear remaining heavy metal ion.Go
Except the type of the hydrophilic radical of the influence factor including surfactant of efficiency, the mol ratio of surfactant and metal ion,
Air velocity, surfactant solution concentration and body phase pH etc..
Brief description of the drawings
Fig. 1 is foamed gas air velocity to Pb2+、Zn2+The influence curve figure of removal efficiency.
Embodiment
With reference to embodiment, the present invention will be further described, but is not limited only to this.
Embodiment 1：
A kind of method that Battery Plant's heavy metal ions in wastewater is thoroughly removed using water based foam system, in pending waste water
Pb2+Concentration be 0.5mmol/L, solution is in faintly acid, and pH 4, step is as follows：
(1) waste water is in faintly acid, and without pretreatment, lauryl sodium sulfate, which is dissolved in water, is configured to lauryl sodium sulfate
Solution is added in waste water, it is well mixed after in waste water the overall density of lauryl sodium sulfate be 3.5mmol/L, dodecyl sulphur
Sour sodium and Pb2+Mol ratio is 7:1；
(2) mixed liquor that step (1) obtains is introduced into the foam processor that underfill has porous media quartz sand,
Foam processor bottom is passed through N2, air velocity 0.1L/min, persistently foam untill it can not produce foam, foam passes through
The pipeline on treating column top is introduced in foam trap, is recycled as surfactant and heavy metal removal.Then again
The analysis that concentration of heavy metal ion is carried out to the water reuse NITRATE BY FLAME ATOMIC spectrophotometer after processing determines, and calculates removal efficiency
η=(C1-C2)/C1, as a result show that this method removes Pb2+Efficiency be 99.8%.
Embodiment 2：
A kind of method that Battery Plant's heavy metal ions in wastewater is thoroughly removed using water based foam system, in pending waste water
Pb2+And Zn2+Concentration is respectively 0.2mmol/L, and 0.3mmol/L, solution is in neutrality, and pH 6.82, step is as follows：
(1) waste water is in neutrality, and without pretreatment, trideceth -4- carboxylic acid sodiums, which are dissolved in water, is configured to tridecanol
Polyethers -4- carboxylic acids sodium solution is added in waste water, is well mixed the overall density of trideceth -4- carboxylic acid sodiums in rear waste water
For 2.5mmol/L, trideceth -4- carboxylic acid sodiums and Pb2+And Zn2+The mol ratio of total mole number is 5:1；
(2) mixed liquor that step (1) obtains is introduced into the foam processor that underfill has porous media quartz sand,
Foam processor bottom is passed through N2, air velocity 0.2L/min, persistently foam untill it can not produce foam, foam passes through
The pipeline on treating column top is introduced in foam trap, is recycled as surfactant and heavy metal removal.Then again
The analysis that concentration of heavy metal ion is carried out to the water reuse NITRATE BY FLAME ATOMIC spectrophotometer after processing determines, and calculates removal efficiency
η=(C1-C2)/C1, as a result show that this method removes Pb2+、Zn2+Efficiency can reach more than 99.9 %.
Embodiment 3：
A kind of method that Battery Plant's heavy metal ions in wastewater is thoroughly removed using water based foam system, pending waste water are dilute
Release rear Pb2+And Zn2+Concentration is respectively 0.3mmol/L, and 0.7mmol/L, solution is in faintly acid, and pH 5, step is as follows：
(1) waste water is in faintly acid, and without pretreatment, trideceth -4- carboxylic acid sodiums, which are dissolved in water, is configured to tridecane
Alcohol polyethers -4- carboxylic acids sodium solution is added in waste water, is well mixed the overall density of trideceth -4- carboxylic acid sodiums in rear waste water
For 5 mmol/L, trideceth -4- carboxylic acid sodiums and Pb2+And Zn2+The mol ratio of total mole number is 5:1；
(2) mixed liquor that step (1) obtains is introduced into the foam processor that underfill has porous media quartz sand,
Foam processor bottom is passed through N2, air velocity 0.2L/min, persistently foam untill it can not produce foam, foam passes through
The pipeline on treating column top is introduced in foam trap, is recycled as surfactant and heavy metal removal.Then again
The analysis that concentration of heavy metal ion is carried out to the water reuse NITRATE BY FLAME ATOMIC spectrophotometer after processing determines, and calculates removal efficiency
η=(C1-C2)/C1, as a result show that this method removes Pb2+、Zn2+Efficiency be 99.8%.
Embodiment 4：
A kind of method that Battery Plant's heavy metal ions in wastewater is thoroughly removed using water based foam system, pending waste water
Pb2+And Zn2+Concentration is respectively 1.0mmol/L, and 1.5mmol/L, solution is in highly acid, and pH 1.2, step is as follows：
(1) waste water is in highly acid, and first Battery Plant's waste water is pre-processed, and prepares 1mmol/L sodium hydroxide solution, is added
Waste water is adjusted in waste water to neutrality, pH 7, precipitation is filtered, retains the concentration that filtrate determines heavy metal ion again；Tridecane
Alcohol polyethers -4- carboxylic acid sodiums and lauryl sodium sulfate, which are dissolved in water, to be configured in solution addition waste water, after being well mixed in waste water
The total concentration of trideceth -4- carboxylic acid sodiums and lauryl sodium sulfate is 12mmol/L, trideceth -4- carboxylic acid sodiums
With lauryl sodium sulfate and Pb2+And Zn2+The mol ratio of total mole number is 5:1；
(2) mixed liquor that step (1) obtains is introduced into the foam processor that underfill has porous media quartz sand,
Foam processor bottom is passed through N2, air velocity 0.3L/min, persistently foam untill it can not produce foam, foam passes through
The pipeline on treating column top is introduced in foam trap, is recycled as surfactant and heavy metal removal.Then again
The analysis that concentration of heavy metal ion is carried out to the water reuse NITRATE BY FLAME ATOMIC spectrophotometer after processing determines, and calculates removal efficiency
η=(C1-C2)/C1, as a result show that this method removes Pb2+、Zn2+Efficiency reach more than 99.8%.
Comparative example
The method for thoroughly removing Battery Plant's heavy metal ions in wastewater using water based foam system as described in Example 1,
Difference is：
Comparative example 1：Air velocity is 0.01L/min.
Comparative example 2：Air velocity is 0.05L/min.
Comparative example 3：Air velocity is 0.08L/min.
Comparative example 4：Air velocity is 1.2L/min.
Comparative example 5：Air velocity is 1.4L/min.
Comparative example 6：Air velocity is 1.6L/min.
Comparative example 7：Air velocity is 2.0L/min.
Experimental example：
The processing method difference foamed gas air velocity of above-described embodiment 1~4 and comparative example 1~7 is to Pb2+、Zn2+Go
Except Fig. 1 is shown in the influence of efficiency.(wherein, surfactant concentration 3.5mmol/L, lead ion, zinc ion concentration are respectively
0.5mmol/L, pH value of solution 6).
Claims (10)
1. a kind of method that Battery Plant's heavy metal ions in wastewater is thoroughly removed using water based foam system, including step are as follows：
(1) pH for adjusting waste water is 4-11, the surfactant solution prepared in advance is added into waste water, surfactant is molten
The addition of liquid makes the mol ratio of surfactant and all heavy metal ion total mole numbers in waste water be (1~50):1, stirring
Uniformly；
(2) mixed liquor that step (1) obtains is introduced into foam processor, foamed gas is passed through in foam processor bottom, sent out
Gas flow speed control is steeped to introduce foam in 0.1~1.0L/min, generation foam by foam processor top duct and collect
Defoaming and the recycling of heavy metal are carried out in device, until non-foam produces.
2. the side according to claim 1 that Battery Plant's heavy metal ions in wastewater is thoroughly removed using water based foam system
Method, it is characterised in that the surfactant described in step (1) is at least containing an electronegative polar hydrophilic group, dredged
Water base carbon chain lengths are 8-24 surfactant, and described negatively charged polar hydrophilic group is sulfate, sulfonic group or carboxylic acid
Base.
3. the side according to claim 2 that Battery Plant's heavy metal ions in wastewater is thoroughly removed using water based foam system
Method, it is characterised in that described surfactant also contains EO, carbonyl or amide group.
4. the side according to claim 2 that Battery Plant's heavy metal ions in wastewater is thoroughly removed using water based foam system
Method, it is characterised in that described surfactant is alkyl sulfate, fatty alcohol polyoxyethylene ether sulfate, alkyl carboxylate
Or the one of which in alkyl, polyether carboxylate or two or more any mixing.
5. the side according to claim 2 that Battery Plant's heavy metal ions in wastewater is thoroughly removed using water based foam system
Method, it is characterised in that the surfactant containing sulfate is lauryl sodium sulfate or sodium sulfate of polyethenoxy ether of fatty alcohol.
6. the side according to claim 2 that Battery Plant's heavy metal ions in wastewater is thoroughly removed using water based foam system
Method, it is characterised in that the surfactant containing carboxylic acid group is sodium laurate or trideceth -4- carboxylic acid sodiums.
7. the side according to claim 1 that Battery Plant's heavy metal ions in wastewater is thoroughly removed using water based foam system
Method, it is characterised in that in step (1) in surfactant and waste water all heavy metal ion total mole numbers mol ratio for (1~
30):1, it is preferred that the mol ratio of surfactant and all heavy metal ion total mole numbers in waste water is (3~15):1, the most
Preferably, the mol ratio of surfactant and all heavy metal ion total mole numbers in waste water is (5~7):1, the pH of waste water are
5-11。
8. the side according to claim 1 that Battery Plant's heavy metal ions in wastewater is thoroughly removed using water based foam system
Method, it is characterised in that foamed gas air velocity is 0.1~0.7L/min in step (2), it is further preferred that foamed gas
Air velocity is 0.2~0.6L/min.
9. the side according to claim 1 that Battery Plant's heavy metal ions in wastewater is thoroughly removed using water based foam system
Method, it is characterised in that foamed gas are N in step (2)2Or air.
10. the side according to claim 1 that Battery Plant's heavy metal ions in wastewater is thoroughly removed using water based foam system
Method, it is characterised in that the underfill of foam processor has porous media quartz sand, porous media quartz sand hole in step (2)
Gap rate is 35-45%, and average pore throat radius is 0.1-10 μm, packed height 4-7mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710576845.9A CN107352680B (en) | 2017-07-14 | 2017-07-14 | Method for thoroughly removing heavy metal ions in wastewater of battery plant by using water-based foam system |
| PCT/CN2017/104317 WO2019010835A1 (en) | 2017-07-14 | 2017-09-29 | Method for completely removing heavy metal ions in battery plant wastewater by using water-based foam system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710576845.9A CN107352680B (en) | 2017-07-14 | 2017-07-14 | Method for thoroughly removing heavy metal ions in wastewater of battery plant by using water-based foam system |
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| CN107352680A true CN107352680A (en) | 2017-11-17 |
| CN107352680B CN107352680B (en) | 2020-04-21 |
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| WO (1) | WO2019010835A1 (en) |
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| CN108658204A (en) * | 2018-06-07 | 2018-10-16 | 厦门大学 | Application of the soapberry extract in foam fraction factor harvests nickel ion |
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| CN109721147A (en) * | 2019-02-27 | 2019-05-07 | 郑州大学 | Metal ion and the method for preparing lithium ion battery negative material in a kind of recycling waste water |
| CN109809518A (en) * | 2019-03-06 | 2019-05-28 | 广州大学 | A kind of device of froth flotation method processing waste water containing thallium |
| CN112427451A (en) * | 2020-11-20 | 2021-03-02 | 山东大学 | Water-based foam system and method for simultaneously removing heavy metals and organic pollutants in soil |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108658204A (en) * | 2018-06-07 | 2018-10-16 | 厦门大学 | Application of the soapberry extract in foam fraction factor harvests nickel ion |
| CN109081393A (en) * | 2018-08-27 | 2018-12-25 | 北京中晟清源环保科技有限公司 | A kind of new-type air-floatation auxiliary agent and preparation method |
| CN109721147A (en) * | 2019-02-27 | 2019-05-07 | 郑州大学 | Metal ion and the method for preparing lithium ion battery negative material in a kind of recycling waste water |
| CN109809518A (en) * | 2019-03-06 | 2019-05-28 | 广州大学 | A kind of device of froth flotation method processing waste water containing thallium |
| CN112427451A (en) * | 2020-11-20 | 2021-03-02 | 山东大学 | Water-based foam system and method for simultaneously removing heavy metals and organic pollutants in soil |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107352680B (en) | 2020-04-21 |
| WO2019010835A1 (en) | 2019-01-17 |
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