CN110510776A - A kind of heavy metal-polluted method for treating water - Google Patents
A kind of heavy metal-polluted method for treating water Download PDFInfo
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- CN110510776A CN110510776A CN201910834188.2A CN201910834188A CN110510776A CN 110510776 A CN110510776 A CN 110510776A CN 201910834188 A CN201910834188 A CN 201910834188A CN 110510776 A CN110510776 A CN 110510776A
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- heavy metal
- sewage
- added
- sodium
- treating water
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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
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- 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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- 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)
- Inorganic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a kind of heavy metal-polluted method for treating water, comprising the following steps: (1) vulcanized sodium, heating and thermal insulation are added into sewage；(2) ferrous sulfate, dimethyl diallyl ammonium chloride and lauryl sodium sulfate, high-temperature stirring are added into sewage again and obtain mixed solution；(3) cool down to the mixed solution, sodium hydroxide is added in the side Bian Jiangwen；(4) it filters, the mixed solution is placed under magnetic field and is stirred, sodium peroxydisulfate is added, refilters, and acid solution is added into the mixed solution and is neutralized.It will recycle ferrous sulfate cooperation dimethyl diallyl ammonium chloride and lauryl sodium sulfate processing that can improve the removal effect to heavy metal through vulcanized sodium treated sewage；Sodium hydroxide is added in temperature-fall period, then magnetic field energy is cooperated to improve the ratio that heavy metal in sewage is converted into precipitating.
Description
Technical field
The present invention relates to technical field of sewage, more particularly to a kind of heavy metal-polluted method for treating water.
Background technique
Heavy metal wastewater thereby is discharged mainly from enterprises such as mine, smelting, electrolysis, plating, pesticide, medicine, paint, pigment
Waste water.
In industrial production, in order to reduce environmental pollution, sewage could discharge after need to being purified, and purify its of sewage
In important link be the heavy metal removed in sewage.Currently, heavy metal-polluted water process includes method of chemical treatment, at physics
Logos and biological treatment, method of chemical treatment multi-pass overregulate the pH value of sewage, and using sulphion to the heavy metal in sewage
It is precipitated, realizes the effect for removing removing heavy metals.
The existing method of chemical treatment to sewage merely relies on chemical substance, and the conversion ratio chemically reacted is in certain journey
Reaction environment is depended on degree, merely it is undesirable to easily lead to removal effect for addition chemical substance.
Summary of the invention
An object of the present invention is to provide the better heavy metal-polluted method for treating water of a kind of pair of heavy metals removal effect.
A kind of heavy metal-polluted method for treating water, comprising the following steps:
(1) vulcanized sodium, heating and thermal insulation are added into sewage；
(2) it is added ferrous sulfate, dimethyl diallyl ammonium chloride and lauryl sodium sulfate into sewage again, high-temperature stirring,
Obtain mixed solution；
(3) cool down to the mixed solution, sodium hydroxide is added in the side Bian Jiangwen；
(4) it filters, the mixed solution is placed under magnetic field and is stirred, sodium peroxydisulfate is added, refilters, and to the mixed solution
Middle addition acid solution is neutralized.
The beneficial effects of the present invention are: ferrous sulfate will be recycled to cooperate dimethyl two through vulcanized sodium treated sewage
Allyl ammonium chloride and lauryl sodium sulfate processing can improve the removal effect to heavy metal；Hydrogen-oxygen is added in temperature-fall period
Change sodium, then magnetic field energy is cooperated to improve the ratio that heavy metal in sewage is converted into precipitating.
In addition, the heavy metal-polluted method for treating water provided according to the present invention, can also have the following additional technical features:
Further, in the step (1), the concentration of the vulcanized sodium is 200 ~ 600mg/L, additional amount be sewage weight 1 ~
2%。
Further, the temperature of the heating and thermal insulation is 50 ~ 60 DEG C, and the duration is 3 ~ 5 hours.
Further, in the step (2), ferrous sulfate, dimethyl diallyl ammonium chloride and lauryl sodium sulfate
Concentration be respectively 50 ~ 100mg/L, 10 ~ 20mg/L and 50 ~ 80mg/L, additional amount is respectively the 1 ~ 2% of sewage weight, 2 ~ 5% Hes
0.2~1%。
Further, the temperature of the high-temperature stirring is 80 ~ 90 DEG C.
Further, in the step (3), the cooling extent of the cooling is 0.1 ~ 0.3 DEG C/min, and being cooled to 5 DEG C is
Only.
Further, the concentration of the sodium hydroxide is 50 ~ 150mg/L, and additional amount is until PH=10 of sewage.
Further, in the step (4), the average field strength in the magnetic field is 0.2 ~ 0.7T, and the retention time is 1 ~ 2
Hour.
Further, in the step (4), the concentration of the sodium persulfide is 10 ~ 20mg/L, and additional amount is sewage weight
0.5 ~ 1%, the acid solution be hydrochloric acid, ammonium chloride, carbonic acid one or more combinations.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Specific embodiment
To keep objects, features and advantages of the present invention more obvious and easy to understand, below with reference to embodiment to of the invention
Specific embodiment is described in detail.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is make it is more thorough and comprehensive to the disclosure.
Embodiment 1
A kind of heavy metal-polluted method for treating water, comprising the following steps:
(1) vulcanized sodium, heating and thermal insulation are added into sewage, the concentration of the vulcanized sodium is 550mg/L, and additional amount is sewage weight
1.5%, the temperature of the heating and thermal insulation is 50 DEG C, and the duration is 3 hours；
(2) it is added ferrous sulfate, dimethyl diallyl ammonium chloride and lauryl sodium sulfate into sewage again, high-temperature stirring,
The concentration of ferrous sulfate, dimethyl diallyl ammonium chloride and lauryl sodium sulfate is respectively 70mg/L, 20mg/L and 60mg/
L, additional amount are respectively 1%, 3% and the 0.6% of sewage weight, and the temperature of the high-temperature stirring is 90 DEG C, obtain mixed solution；
(3) cooling down to the mixed solution, sodium hydroxide is added in the side Bian Jiangwen, and the cooling extent of the cooling is 0.1 DEG C/min,
Until being cooled to 5 DEG C, the concentration of the sodium hydroxide is 90mg/L, and additional amount is until PH=10 of sewage；
(4) it filters, the mixed solution is placed under magnetic field and is stirred, sodium peroxydisulfate, the average field strength in the magnetic field is added
For 0.6T, the retention time is 1 hour, is refiltered, and acid solution is added into the mixed solution and is neutralized, the over cure
The concentration for changing sodium is 10mg/L, and additional amount is the 0.7% of sewage weight, and the acid solution is hydrochloric acid, is neutralized to PH=7.
When handling sewage, sewage can be injected in process tank, apply magnetic field in the two sides of process tank.
It is an advantage of the present invention that ferrous sulfate will be recycled to cooperate dimethyl diene through vulcanized sodium treated sewage
Propyl ammonium chloride and lauryl sodium sulfate processing can improve the removal effect to heavy metal；Hydroxide is added in temperature-fall period
Sodium, then magnetic field energy is cooperated to improve the ratio that heavy metal in sewage is converted into precipitating.
Embodiment 2
A kind of heavy metal-polluted method for treating water, comprising the following steps:
(1) vulcanized sodium, heating and thermal insulation are added into sewage, the concentration of the vulcanized sodium is 200mg/L, and additional amount is sewage weight
1%, the temperature of the heating and thermal insulation is 50 DEG C, and the duration is 3 hours；
(2) it is added ferrous sulfate, dimethyl diallyl ammonium chloride and lauryl sodium sulfate into sewage again, high-temperature stirring,
The concentration of ferrous sulfate, dimethyl diallyl ammonium chloride and lauryl sodium sulfate is respectively 50mg/L, 10mg/L and 50mg/
L, additional amount are respectively 1%, 2% and the 0.2% of sewage weight, and the temperature of the high-temperature stirring is 80 DEG C, obtain mixed solution；
(3) cooling down to the mixed solution, sodium hydroxide is added in the side Bian Jiangwen, and the cooling extent of the cooling is 0.1 DEG C/min,
Until being cooled to 5 DEG C, the concentration of the sodium hydroxide is 50mg/L, and additional amount is until PH=10 of sewage；
(4) it filters, the mixed solution is placed under magnetic field and is stirred, sodium peroxydisulfate, the average field strength in the magnetic field is added
For 0.2T, the retention time is 1 hour, is refiltered, and acid solution is added into the mixed solution and is neutralized, the over cure
The concentration for changing sodium is 10mg/L, and additional amount is the 0.5% of sewage weight, and the acid solution is the combination of ammonium chloride and carbonic acid,
It is neutralized to PH=7.
Embodiment 3
A kind of heavy metal-polluted method for treating water, comprising the following steps:
(1) vulcanized sodium, heating and thermal insulation are added into sewage, the concentration of the vulcanized sodium is 600mg/L, and additional amount is sewage weight
2%, the temperature of the heating and thermal insulation is 60 DEG C, and the duration is 5 hours；
(2) it is added ferrous sulfate, dimethyl diallyl ammonium chloride and lauryl sodium sulfate into sewage again, high-temperature stirring,
The concentration of ferrous sulfate, dimethyl diallyl ammonium chloride and lauryl sodium sulfate be respectively 100mg/L, 20mg/L and
80mg/L, additional amount are respectively 2%, 5% and the 1% of sewage weight, and the temperature of the high-temperature stirring is 90 DEG C, obtain mixed solution；
(3) cooling down to the mixed solution, sodium hydroxide is added in the side Bian Jiangwen, and the cooling extent of the cooling is 0.3 DEG C/min,
Until being cooled to 5 DEG C, the concentration of the sodium hydroxide is 150mg/L, and additional amount is until PH=10 of sewage；
(4) it filters, the mixed solution is placed under magnetic field and is stirred, sodium peroxydisulfate, the average field strength in the magnetic field is added
For 0.7T, the retention time is 2 hours, is refiltered, and acid solution is added into the mixed solution and is neutralized, the over cure
The concentration for changing sodium is 20mg/L, and additional amount is the 1% of sewage weight, and the acid solution is hydrochloric acid, sodium carbonate, sodium bicarbonate
One or more combinations.
Reference examples 1
A kind of heavy metal-polluted method for treating water, comprising the following steps:
Vulcanized sodium, heating and thermal insulation are added into sewage, the concentration of the vulcanized sodium is 550mg/L, and additional amount is sewage weight
1.5%, the temperature of the heating and thermal insulation is 50 DEG C, and the duration is 3 hours.
Reference examples 2
A kind of heavy metal-polluted method for treating water, comprising the following steps:
(1) vulcanized sodium, heating and thermal insulation are added into sewage, the concentration of the vulcanized sodium is 550mg/L, and additional amount is sewage weight
1.5%, the temperature of the heating and thermal insulation is 50 DEG C, and the duration is 3 hours；
(2) ferrous sulfate, high-temperature stirring is added into sewage again, the ferrous sulfate concentration is respectively 70mg/L, additional amount point
Not Wei sewage weight 1%, the temperature of the high-temperature stirring is 90 DEG C.
Reference examples 3
This reference examples and embodiment 1 are almost the same, the difference is that step (3) are as follows:
Cool down to the mixed solution, sodium hydroxide is added at 20 °C, the concentration of the sodium hydroxide is 90mg/L, is added
Entering amount is until PH=10 of sewage.
Reference examples 4
This reference examples and embodiment 1 are almost the same, the difference is that mixed solution is not placed under magnetic field by step (4).
The present invention is verified using the blowdown sewage of Jiangxi mining site, and heavy metal initial concentration is iron 240mg/L, copper
710mg/L, lead 8.5mg/L, cadmium 2.3mg/L, are respectively handled sewage using above-described embodiment and reference examples, after processing
Sewage various tenors are measured using graphite furnace atomic absorption spectrometry and calculate removal rate, the results are shown in Table 1.
Table 1
| Grouping | Iron (mg/L) | Iron removal rate (%) | Copper (mg/L) | Copper removal rate (%) | Lead (mg/L) | Lead removal rate (%) | Cadmium (mg/L) | Cadmium removal rate (%) |
| Initial sewage | 240 | - | 710 | - | 8.5 | - | 2.3 | - |
| Embodiment 1 | 8 | 96.7 | 27 | 96.2 | 0.3 | 96.5 | 0.05 | 97.8 |
| Embodiment 2 | 13 | 96.6 | 22 | 96.9 | 0.3 | 96.5 | 0.07 | 96.9 |
| Embodiment 3 | 18 | 92.5 | 36 | 94.9 | 0.4 | 95.3 | 0.04 | 98.3 |
| Reference examples 1 | 66 | 72.5 | 83 | 88.3 | 2.5 | 70.6 | 0.21 | 90.9 |
| Reference examples 2 | 42 | 82.5 | 64 | 91.0 | 1.6 | 81.2 | 0.14 | 93.9 |
| Reference examples 3 | 21 | 91.3 | 44 | 93.8 | 1.1 | 87.1 | 0.08 | 96.5 |
| Reference examples 4 | 28 | 88.3 | 52 | 92.7 | 0.6 | 92.9 | 0.07 | 96.9 |
As it can be seen from table 1 embodiment 1, embodiment 2 and embodiment 3 achieve good removal effect, removal rate reaches
96% or more；Comparative example 1, reference examples 1 and reference examples 2, it can be seen that embodiment 1 has bright compared with reference examples 1 and reference examples 2
Aobvious advantage；Comparative example 1, reference examples 3 and reference examples 4, it can be seen that cooling is added sodium hydroxide and uses magnetic field, one
Determine that the removal to heavy metal can be promoted in degree.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (9)
1. a kind of heavy metal-polluted method for treating water, which comprises the following steps:
(1) vulcanized sodium, heating and thermal insulation are added into sewage；
(2) it is added ferrous sulfate, dimethyl diallyl ammonium chloride and lauryl sodium sulfate into sewage again, high-temperature stirring,
Obtain mixed solution；
(3) cool down to the mixed solution, sodium hydroxide is added in the side Bian Jiangwen；
(4) it filters, the mixed solution is placed under magnetic field and is stirred, sodium peroxydisulfate is added, refilters, and to the mixed solution
Middle addition acid solution is neutralized.
2. heavy metal-polluted method for treating water according to claim 1, which is characterized in that in the step (1), the vulcanization
The concentration of sodium is 200 ~ 600mg/L, and additional amount is the 1 ~ 2% of sewage weight.
3. heavy metal-polluted method for treating water according to claim 1 or 2, which is characterized in that the temperature of the heating and thermal insulation
It is 50 ~ 60 DEG C, the duration is 3 ~ 5 hours.
4. heavy metal-polluted method for treating water according to claim 1, which is characterized in that in the step (2), sulfuric acid is sub-
The concentration of iron, dimethyl diallyl ammonium chloride and lauryl sodium sulfate be respectively 50 ~ 100mg/L, 10 ~ 20mg/L and 50 ~
80mg/L, additional amount are respectively 1 ~ 2%, 2 ~ 5% and the 0.2 ~ 1% of sewage weight.
5. heavy metal-polluted method for treating water according to claim 1 or 4, which is characterized in that the temperature of the high-temperature stirring
It is 80 ~ 90 DEG C.
6. heavy metal-polluted method for treating water according to claim 1, which is characterized in that in the step (3), the cooling
Cooling extent be 0.1 ~ 0.3 DEG C/min, until being cooled to 5 DEG C.
7. heavy metal-polluted method for treating water according to claim 1 or 6, which is characterized in that the concentration of the sodium hydroxide
For 50 ~ 150mg/L, additional amount is until PH=10 of sewage.
8. heavy metal-polluted method for treating water according to claim 1, which is characterized in that in the step (4), the magnetic field
Average field strength be 0.2 ~ 0.7T, the retention time be 1 ~ 2 hour.
9. heavy metal-polluted method for treating water according to claim 1 or 8, which is characterized in that described in the step (4)
The concentration of sodium persulfide be 10 ~ 20mg/L, additional amount be sewage weight 0.5 ~ 1%, the acid solution be hydrochloric acid, ammonium chloride,
One or more combinations of carbonic acid.
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| CN201910834188.2A CN110510776B (en) | 2019-09-04 | 2019-09-04 | Heavy metal sewage treatment method |
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| CN201910834188.2A CN110510776B (en) | 2019-09-04 | 2019-09-04 | Heavy metal sewage treatment method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110921909A (en) * | 2019-12-13 | 2020-03-27 | 西安润川环保科技有限公司 | Heavy metal sewage treatment method |
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2019
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| CN101186373A (en) * | 2007-11-30 | 2008-05-28 | 华南理工大学 | Method for processing paroxysmal mercury polluted water under emergency condition |
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| CN102531280A (en) * | 2011-12-16 | 2012-07-04 | 深圳市祐林环保有限公司 | Method for treating wastewater of printed circuit board |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110921909A (en) * | 2019-12-13 | 2020-03-27 | 西安润川环保科技有限公司 | Heavy metal sewage treatment method |
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