CN106630293A - Emergency treatment method for antimony-exceeded waste water at low temperature - Google Patents
Emergency treatment method for antimony-exceeded waste water at low temperature Download PDFInfo
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- CN106630293A CN106630293A CN201710006859.7A CN201710006859A CN106630293A CN 106630293 A CN106630293 A CN 106630293A CN 201710006859 A CN201710006859 A CN 201710006859A CN 106630293 A CN106630293 A CN 106630293A
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- antimony
- waste 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
- 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
- C02F1/52—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
- C02F1/56—Macromolecular compounds
-
- 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
-
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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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)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses an emergency treatment method for antimony-exceeded waste water at low temperature. The method comprises the following steps: firstly adjusting the PH value of the waste water to 8.0-9.0 by using an alkaline solution; then adding sodium sulfide with a dosage of 15-30 times of the mass content of antimony and conducting full stirring; adding a ferric-salt coagulant with a dosage of 40-50 times of the mass content of antimony; then adding polyacrylamide with a dosage of 5.0ppm and conducting full stirring; and conducting static settlement. The antimony content in the obtained supernatant is determined, the removing rate of antimony can reach 99.75%, the content of treated antimony is less than 5.0[mu]g/L, and meets the antimony content requirement of the environmental quality standard of surface water and drinking water sanitary standard of China. By mixing sodium sulfide with the ferric-salt coagulant and polyacrylamide, respective advantages of above materials are fully taken; the method is short in technological processes and has high removing rate of antimony at low temperature (0-4 DEG C, not including 0 DEG C).
Description
Technical field
The invention belongs to technical field of waste water processing, and in particular to antimony overstandard waste water is emergent under a kind of reply low temperature environment
Processing method.
Background technology
The main source of antimony is antimony ore exploitation and the blowdown in smelting in water environment.Generally, in water antimony it is natural
Background concentration is very low.Antimony is both sexes rare metal, and the presence valence state in water is mainly trivalent antimony and quinquevalence antimony.Trivalent in water
Antimony can easily be dissolved oxygen and be oxidized to quinquevalence antimony, therefore, Tailings Dam draining and containing dissolved oxygen surface water in, antimony mainly with
There is [Sb (OH) in antimonic metaantimmonic acid root form6 -].Research shows that antimony has chronic toxicity and carcinogenicity to biological and human body.I
Antimony content is required in state's environmental quality standards and sanitary standard for drinking water must not exceed 0.005mg/L.Therefore, antimony pollution problem
Can not be ignored, the effective process of antimony overstandard waste water is very urgent.
At present, the processing method of conventional stibium-containing wastewater has chemical precipitation method and coagulant sedimentation.This two methods is low
Because chemical reaction is slack-off, coagulant hydrolyzes the reason such as limited in warm environment, its treatment effect to antimony is extremely restricted.Mirror
In this, the present invention is to overcome low temperature environment to affect, there is provided a kind of emergency processing method for removing antimony effective at low ambient temperatures.
The content of the invention
It is an object of the present invention to overcome the deficiencies in the prior art, there is provided a kind of flow process is short, at low ambient temperatures (0～4
DEG C, without 0 DEG C) there is the emergency processing method of the very high antimony overstandard waste water except antimony efficiency.
The object of the invention is achieved through the following technical solutions：
A kind of emergency processing method of antimony overstandard waste water under reply low temperature environment, step is as follows：First adjust useless with aqueous slkali
Water pH=8.0～9.0；Again plus vulcanized sodium is sufficiently stirred for, chemical feeding quantity is 15～30 times of antimony mass content；Again plus trivalent iron salt is mixed
Solidifying agent, chemical feeding quantity is 40～50 times of antimony mass content；Again plus polyacrylamide is sufficiently stirred for, chemical feeding quantity is 5.0ppm；Stand
Precipitation.Antimony content in supernatant is determined, up to 99.75%, antimony content is less than 5.0 μ g/L to antimony clearance after process, reaches China
《Water environment quality standard》(GB 3838-2002) and《Standards for drinking water quality》Antimony contains in (GB 5749-2006)
Amount is required.
The emergency processing method of antimony overstandard waste water, is specifically carried out in the steps below under a kind of reply low temperature environment：
(1) aqueous slkali is first added to adjust wastewater pH=8.0～9.0；
(2) Jia 15 again～vulcanized sodium of 30 times of antimony mass contents, be sufficiently stirred for 50～60 minutes；
(3) Jia 40 again～the trivalent iron salt coagulant of 50 times of antimony mass contents, be sufficiently stirred for 30～40 minutes；
(4) add 5.0ppm polyacrylamides again, be sufficiently stirred for 20 minutes；
(5) staticly settle 45～60 minutes, take supernatant detection.
Described aqueous slkali is at least one in NaOH, potassium hydroxide and lime solution.
The trivalent iron salt coagulant is at least one in iron chloride, ferric sulfate and bodied ferric sulfate.
The bodied ferric sulfate sulfur acid iron is about 20%～21% (quality).
In the emergency processing method of the antimony overstandard waste water of the present invention, add the effect of three kinds of medicaments as follows：
Vulcanized sodium is a kind of important heavy metals removal agent.Sulphion in vulcanized sodium is combined life with many heavy metal ion
Into the minimum sulfide precipitation of solubility.The solubility product constant very little of sulfide precipitation, therefore, adding a small amount of vulcanized sodium can make weight
Metal ion precipitates rapidly.Sulfide precipitation agent is added heavy metal ions in wastewater is generated sulfide precipitation and is removed
Compared with neutralization precipitation method, its advantage is method：Heavy metal sulfide solubility is lower than the solubility of its hydroxide, and
Between 7～9, the waste water after process typically without neutralization, also can have an effect the pH value of reaction under low temperature environment.Have the disadvantage it
The precipitate particles of formation are less.
Trivalent iron salt coagulant, generally refers to iron chloride, ferric sulfate, bodied ferric sulfate, is a kind of efficient water treatment agent.
There is stronger absorption, wadding bridge, coagulative precipitation performance after hydrolysis, and alumen ustum is more, closely knit, flocculation settling velocity is fast, and floccule body is close
Real, not broken, water quality after purification is good, without aluminium chlorine and other harmful heavy metal ions, non-iron-ion water phase transfer, water body
Not yellowing, it is nontoxic, it is completely reliable；The pH value range that adapts to water body it is wide (4～11, optimal 6～9), the water body pH after purification
Value and total alkalinity amplitude of variation are little.But in low temperature environment, hydrolysis property is restricted, generation flco is less, and sinking speed is slow.
Polyacrylamide is a kind of organic high molecular polymer, while be also a kind of macromolecule water treatment flocculant, specially
Suspended particulate in for adsorbing water, plays between particles link bridging action, fine grained is formed than larger floc sedimentation, and
Accelerate the speed of precipitation.Therefore, the present invention selects polyacrylamide as flocculation aid and vulcanized sodium, trivalent iron salt coagulant one
Rise and use, improve and promote the flocculation sediment effect of vulcanized sodium, trivalent iron salt coagulant.
Compared with prior art, the present invention has advantages below and beneficial effect：
Vulcanized sodium, trivalent iron salt coagulant and polyacrylamide are combined together and are used by the present invention, give full play to them
Respective advantage, can not only make except antimony effect is higher, and can be used in low temperature environment.
Specific embodiment
With reference to embodiment, the present invention is described in further detail, but embodiments of the present invention not limited to this.
Antimony solution used in the embodiment of the present invention and comparative example (the i.e. concrete simulated wastewater for processing) is by with 1000 μ g/
ML antimony standard liquid is that mother liquor dilution is obtained, antimony content：1.0mg/L, pH=2.38.
The bodied ferric sulfate sulfur acid iron that following examples and comparative example are used is about 20%～21% (quality), meets an urgent need
It is 0～4 DEG C that the low temperature environment for processing antimony overstandard waste water is temperature, without 0 DEG C.
Embodiment 1
The emergency processing method of antimony overstandard waste water, comprises the following steps under a kind of reply low temperature environment：
(1) aqueous slkali is first added to adjust the pH=8.0 of waste water；
(2) add the vulcanized sodium of 30 times of antimony mass contents again, be sufficiently stirred for 50 minutes；
(3) add the trivalent iron salt coagulant ferric sulfate of 50 times of antimony mass contents again, be sufficiently stirred for 30 minutes；
(4) add 5.0ppm polyacrylamides again, be sufficiently stirred for 20 minutes；
(5) staticly settle 45 minutes, take supernatant.
It is 3.71 μ g/L to measure antimony content in supernatant, and the clearance of antimony content is 99.63%.
Embodiment 2
The emergency processing method of antimony overstandard waste water, comprises the following steps under a kind of reply low temperature environment：
(1) aqueous slkali is first added to adjust the pH=8.0 of waste water；
(2) add the vulcanized sodium of 15 times of antimony mass contents again, be sufficiently stirred for 50 minutes；
(3) add the trivalent iron salt coagulant iron chloride of 40 times of antimony mass contents again, be sufficiently stirred for 30 minutes；
(4) add 5.0ppm polyacrylamides again, be sufficiently stirred for 20 minutes；
(5) staticly settle 45 minutes, take supernatant.
It is 5.03 μ g/L to measure antimony content in supernatant, and the clearance of antimony content is 99.50%.
Embodiment 3
The emergency processing method of antimony overstandard waste water, comprises the following steps under a kind of reply low temperature environment：
(1) aqueous slkali is first added to adjust the pH=8.0 of waste water；
(2) add the vulcanized sodium of 30 times of antimony mass contents again, be sufficiently stirred for 60 minutes；
(3) add the trivalent iron salt coagulant polymeric ferric sulfate of 50 times of antimony mass contents again, be sufficiently stirred for 40 minutes；
(4) add 5.0ppm polyacrylamides again, be sufficiently stirred for 20 minutes；
(5) staticly settle 60 minutes, take supernatant.
It is 2.53 μ g/L to measure antimony content in supernatant, and the clearance of antimony content is 99.75%.
Embodiment 4
The emergency processing method of antimony overstandard waste water, comprises the following steps under a kind of reply low temperature environment：
(1) aqueous slkali is first added to adjust the pH=9.0 of waste water；
(2) add the vulcanized sodium of 15 times of antimony mass contents again, be sufficiently stirred for 50 minutes；
(3) add the trivalent iron salt coagulant polymeric ferric sulfate of 50 times of antimony mass contents again, be sufficiently stirred for 30 minutes；
(4) add 5.0ppm polyacrylamides again, be sufficiently stirred for 20 minutes；
(5) staticly settle 60 minutes, take supernatant.
It is 5.09 μ g/L to measure antimony content in supernatant, and the clearance of antimony content is 99.50%.
Embodiment 5
The emergency processing method of antimony overstandard waste water, comprises the following steps under a kind of reply low temperature environment：
(1) aqueous slkali is first added to adjust the pH=9.0 of waste water；
(2) add the vulcanized sodium of 30 times of antimony mass contents again, be sufficiently stirred for 60 minutes；
(3) add the trivalent iron salt coagulant ferric sulfate of 50 times of antimony mass contents again, be sufficiently stirred for 40 minutes；
(4) add 5.0ppm polyacrylamides again, be sufficiently stirred for 20 minutes；
(5) staticly settle 60 minutes, take supernatant.
It is 4.17 μ g/L to measure antimony content in supernatant, and the clearance of antimony content is 99.58%.
Comparative example 1
The emergency processing method of antimony overstandard waste water, comprises the following steps under a kind of reply low temperature environment：
(1) aqueous slkali is first added to adjust pH=8.0～9.0 of waste water；
(2) add the vulcanized sodium of 30 times of antimony mass contents again, be sufficiently stirred for 60 minutes；
(3) staticly settle 60 minutes, take supernatant.
It is 876.16 μ g/L to measure antimony content in supernatant, and the clearance of antimony content is 12.38%.
Comparative example 2
The emergency processing method of antimony overstandard waste water, comprises the following steps under a kind of reply low temperature environment：
(1) aqueous slkali is first added to adjust pH=8.0～9.0 of waste water；
(2) add the trivalent iron salt coagulant polymeric ferric sulfate of 50 times of antimony mass contents again, be sufficiently stirred for 40 minutes；
(3) staticly settle 60 minutes, take supernatant.
It is 631.08 μ g/L to measure antimony content in supernatant, and the clearance of antimony content is 36.90%.
Comparative example 3
The emergency processing method of antimony overstandard waste water, comprises the following steps under a kind of reply low temperature environment：
(1) aqueous slkali is first added to adjust pH=8.0～9.0 of waste water；
(2) add the vulcanized sodium of 30 times of antimony mass contents again, be sufficiently stirred for 60 minutes；
(3) add 5.0ppm polyacrylamides again, be sufficiently stirred for 20 minutes；
(4) staticly settle 60 minutes, take supernatant.
It is 129.76 μ g/L to measure antimony content in supernatant, and the clearance of antimony content is 87.02%.
Comparative example 4
The emergency processing method of antimony overstandard waste water, comprises the following steps under a kind of reply low temperature environment：
(1) aqueous slkali is first added to adjust pH=8.0～9.0 of waste water；
(2) add the trivalent iron salt coagulant polymeric ferric sulfate of 50 times of antimony mass contents again, be sufficiently stirred for 40 minutes；
(3) add 5.0ppm polyacrylamides again, be sufficiently stirred for 20 minutes；
(4) staticly settle 60 minutes, take supernatant.
It is 69.09 μ g/L to measure antimony content in supernatant, and the clearance of antimony content is 93.09%.
Comparative example 5
The emergency processing method of antimony overstandard waste water, comprises the following steps under a kind of reply low temperature environment：
(1) aqueous slkali is first added to adjust pH=8.0～9.0 of waste water；
(2) add the vulcanized sodium of 30 times of antimony mass contents again, be sufficiently stirred for 60 minutes；
(3) add the trivalent iron salt coagulant polymeric ferric sulfate of 50 times of antimony mass contents again, be sufficiently stirred for 40 minutes；
(4) staticly settle 60 minutes, take supernatant.
It is 23.74 μ g/L to measure antimony content in supernatant, and the clearance of antimony content is 97.63%.
Comparative example 6
The emergency processing method of antimony overstandard waste water, comprises the following steps under a kind of reply low temperature environment：
(1) aqueous slkali is first added to adjust pH=8.0～9.0 of waste water；
(2) add the vulcanized sodium of 30 times of antimony mass contents again, be sufficiently stirred for 60 minutes；
(3) add the ferrous sulfate of 50 times of antimony mass contents again, be sufficiently stirred for 40 minutes；
(4) add 5.0ppm polyacrylamides again, be sufficiently stirred for 20 minutes；
(5) staticly settle 60 minutes, take supernatant.
It is 17.09 μ g/L to measure antimony content in supernatant, and the clearance of antimony content is 98.29%.
Can be seen that from above example and comparative example add trivalent iron salt coagulant except antimony effect is more sub- than adding sulfuric acid
Iron except antimony effect it is good, only add vulcanized sodium, trivalent iron salt coagulant, vulcanized sodium/polyacrylamide, trivalent iron salt coagulant/
Polyacrylamide, vulcanized sodium/trivalent iron salt coagulant does not have vulcanized sodium/trivalent iron salt coagulant/polyacrylamide except antimony effect
Amine except antimony effect it is good.As can be seen here, the effect except antimony method in low temperature environment proposed by the present invention is good.
Above-described embodiment is the present invention preferably embodiment, but embodiments of the present invention not by above-described embodiment
Limit, other any Spirit Essences without departing from the present invention and the change, modification, replacement made under principle, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (6)
1. it is a kind of reply low temperature environment under antimony overstandard waste water emergency processing method, it is characterised in that step is as follows：First use alkali soluble
Liquid adjusts wastewater pH=8.0～9.0；Again plus vulcanized sodium is sufficiently stirred for, chemical feeding quantity is 15～30 times of antimony mass content；Plus three again
Valency iron salt coagulant, chemical feeding quantity is 40～50 times of antimony mass content；Again plus polyacrylamide is sufficiently stirred for, chemical feeding quantity is
5.0ppm；Staticly settle.
2. under a kind of reply low temperature environment according to claim 1 antimony overstandard waste water emergency processing method, its feature exists
In specifically carrying out in the steps below：
(1) aqueous slkali is first added to adjust wastewater pH=8.0～9.0；
(2) Jia 15 again～vulcanized sodium of 30 times of antimony mass contents, be sufficiently stirred for 50～60 minutes；
(3) Jia 40 again～the trivalent iron salt coagulant of 50 times of antimony mass contents, be sufficiently stirred for 30～40 minutes；
(4) add 5.0ppm polyacrylamides again, be sufficiently stirred for 20 minutes；
(5) 45～60 minutes are staticly settled.
3. it is according to claim 1 and 2 it is a kind of reply low temperature environment under antimony overstandard waste water emergency processing method, its feature
It is that it is 0～4 DEG C that the low temperature environment is temperature, without 0 DEG C.
4. it is according to claim 1 and 2 it is a kind of reply low temperature environment under antimony overstandard waste water emergency processing method, its feature
It is that described aqueous slkali is at least one in NaOH, potassium hydroxide and lime solution.
5. it is according to claim 1 and 2 it is a kind of reply low temperature environment under antimony overstandard waste water emergency processing method, its feature
It is that the trivalent iron salt coagulant is at least one in iron chloride, ferric sulfate and bodied ferric sulfate.
6. under a kind of reply low temperature environment according to claim 5 antimony overstandard waste water emergency processing method, its feature exists
In the bodied ferric sulfate sulfur acid iron is 20%～21% (quality).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107082480A (en) * | 2017-06-07 | 2017-08-22 | 环境保护部华南环境科学研究所 | A kind of method that PAM helps solidifying emergency processing overstandard waste water containing molybdenum under low temperature |
| CN107162140A (en) * | 2017-06-07 | 2017-09-15 | 环境保护部华南环境科学研究所 | The exceeded emergence treating method of molybdenum in molybdic tailing sand overlying water under a kind of low temperature |
Citations (2)
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| CN103011464A (en) * | 2012-12-07 | 2013-04-03 | 常州大学 | Treatment method of stibium-containing wastewater |
| CN105621738A (en) * | 2015-12-31 | 2016-06-01 | 上海丰信环保科技有限公司 | Treatment method of stibium-containing waste water |
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2017
- 2017-01-05 CN CN201710006859.7A patent/CN106630293A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103011464A (en) * | 2012-12-07 | 2013-04-03 | 常州大学 | Treatment method of stibium-containing wastewater |
| CN105621738A (en) * | 2015-12-31 | 2016-06-01 | 上海丰信环保科技有限公司 | Treatment method of stibium-containing waste water |
Non-Patent Citations (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107082480A (en) * | 2017-06-07 | 2017-08-22 | 环境保护部华南环境科学研究所 | A kind of method that PAM helps solidifying emergency processing overstandard waste water containing molybdenum under low temperature |
| CN107162140A (en) * | 2017-06-07 | 2017-09-15 | 环境保护部华南环境科学研究所 | The exceeded emergence treating method of molybdenum in molybdic tailing sand overlying water under a kind of low temperature |
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Application publication date: 20170510 |