CN103159300A - Method for removing pentavalent antimony pollutant in water through electrochemical method - Google Patents
Method for removing pentavalent antimony pollutant in water through electrochemical method Download PDFInfo
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- CN103159300A CN103159300A CN2013100593680A CN201310059368A CN103159300A CN 103159300 A CN103159300 A CN 103159300A CN 2013100593680 A CN2013100593680 A CN 2013100593680A CN 201310059368 A CN201310059368 A CN 201310059368A CN 103159300 A CN103159300 A CN 103159300A
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Abstract
The invention discloses a method for removing pentavalent antimony pollutant in water through an electrochemical method, and belongs to the technical field of water treatment. The method comprises the following steps: in an electrochemical reactor, serving an iron electrode as a positive electrode and serving a copper plate or a nickel plate as a negative electrode; adjusting a potential of hydrogen (pH) value of the to-be-processed water containing the pentavalent antimony pollutant to be 3-7, introducing the to-be-processed water into the electrochemical reactor, and adjusting the current density to be 10-30 amperes per square meter, the area of electrode plates and the size of the to-be-processed water to be 0.5-1 square meters/ cubic meters, a space distance of the electrode plates to be 1-8cm, and electrochemical treatment time to be 10-40 minutes; and adopting a direct current power supply to supply power. The electrochemical method not only can effectively remove pentavalent antimony pollutant, but also can remove trivalent antimony pollutant.
Description
Technical field
The invention belongs to water-treatment technology field, be specifically related to a kind of electrochemical method of removing quinquevalence antimony pollutent in water.
Background technology
In recent years, the heavy metal pollution problem that causes due to industrial wastewater discharge becomes increasingly conspicuous, and the heavy metal ion of effectively removing in water is the study hotspot of water-treatment technology field always.Heavy metal antimony has toxicity and carinogenicity to human body and biology, can cause the disease of liver, skin, respiratory system and cardiovascular systems aspect, and stibialism has the advantages that to hide for a long time.In the antimony pollution thing, the existence form of antimony has trivalent and two kinds of valence states of pentavalent, and in water, trivalent antimony is easy to remove, but antimonic electronegativity is larger, and solubleness is higher in water, is difficult to remove.Antimony in surface water mainly exists with the pentavalent form, and the trivalent antimony relative concentration is lower.
The method of removing antimony pollution thing in water mainly comprises absorption method, coagulant sedimentation, oxidation reduction process and ion exchange method etc.
Absorption method has that efficient is high, speed is fast, strong adaptability and the advantage such as easy to operate, but because zwitterion in water disturbs, it is lower that absorption method is removed efficient to the antimony pollution thing of lower concentration; The problems such as coagulant sedimentation makes antimony pollution thing self that hydrolytic precipitation occur mainly by regulating the potential of hydrogen of water, perhaps by adding the co-precipitation of chemical agent coagulation, the antimony pollution thing is removed, and coagulant sedimentation exists dosage large, and the quinquevalence antimony clearance is low; The antimony pollution that adopts little electrolysis-neutralization precipitation method to process in acid beneficiation wastewater has been reported, allow acid waste water by being full of the cylindrical reactor of coke and iron filings, then water outlet adds the alkali neutralization, antimony pollution thing in water is removed, this method is difficult to remove the quinquevalence antimony pollutent, removes limited in one's ability to the antimony pollution thing of lower concentration in water; In addition, have report to adopt aminoalkyl group phosphate chelating ion exchange resin as the absorption exchanger, remove the antimony pollution thing in water, result shows, this method is better to the trivalent antimony removal effect, but removes limited in one's ability to quinquevalence antimony.
Electrochemical method is a kind of effective water purification technology, is by electrochemical reaction occurs in water, and single or compound action, make pollutent be purified processing through processes such as flocculation, precipitation, oxidation and reduction.Anode, the cathode sheath stack that Chinese patent 200520031775 discloses a kind of concentric(al) circles tubular by a plurality of different inner diameters forms the device that electrochemical treatment that electrode group, electrolytic solution, cylindrical chamber consist of is purified waste water.It can reach air supporting and select the hardness of removing in water medium suspended substance, catalytic oxidation waste water COD, softening water medium, the effect of removing bacterium algae during in water, water medium is killed in most metal ion, electrolysis by direct current the time.It is electrode that existing bibliographical information adopts aluminium sheet, removes the antimony pollution thing by electric throwing out, and it is better that this method is removed trivalent antimony pollutent effect, lower to antimonic clearance.
Summary of the invention
The object of the present invention is to provide a kind of method of utilizing electrochemical method to remove quinquevalence antimony pollutent in water, first utilize the electro-reduction method that quinquevalence antimony in water is reduced to trivalent antimony, recycling anode dissolution method produces ferrous iron and iron ion, further removes the trivalent antimony pollutent by flocculation and co-precipitation.The ferrous ion that produces effectively reduces the oxidizing potential in electrochemical system, has created reductive condition, has promoted the antimonic electroreduction of negative electrode.But ferrous iron also partial reduction quinquevalence antimony under acidic conditions simultaneously.In this electrochemical system, effectively removed the antimony pollution thing in water by processes such as reduction, flocculation, absorption and precipitations.For achieving the above object, the present invention adopts following technical scheme:
Be difficult to remove for quinquevalence antimony pollutent in water, and the characteristics that trivalent antimony is easily removed in electrochemical reactor, arrange ferroelectric very anode, copper coin or nickel plate are negative electrode.The pH value that will contain the pending water of quinquevalence antimony pollutent is adjusted between 3-7, passes in electrochemical reactor, and the adjusting current density is 10-30A/m
2, polar plate area and staying water are long-pending is 1/2-1m
2/ m
3, polar plate spacing is that 1-8 centimetre, electrochemical treatment time are 10-40 minute.Adopt direct supply to power.
The pH value that preferably, will contain the pending water of quinquevalence antimony pollutent is adjusted to 3-6;
Further preferred, the pH value that will contain the pending water of quinquevalence antimony pollutent is adjusted to 3,3.5,4,5 or 5.6;
Preferred adjusting current density is 10-20A/m
2
The preferred current density of regulating is 10,15 or 20A/m
2
Preferably, polar plate spacing is 1-3 centimetre;
Realize efficient removal to quinquevalence antimony pollutent in water by said process.Through after electrochemical treatment, in water the content of antimony pollution thing lower than China's " drinking water sanitary standard " (GB5749-2006) in the antimony limiting concentration value 5 μ g/L of regulation.
In electrochemical reactor, the electroreduction effect by cathode plate or nickel plate is with quinquevalence antimony (Sb
5+) be reduced to trivalent antimony (Sb
3+):
Sb
5++2e
-→Sb
3+
The electrochemical dissolution reaction occurs in anode iron (Fe) under the anode potential effect, produce ferrous ion and iron ion, and further hydrolysis forms iron flco or ferriferous oxide.The trivalent antimony pollutent is purified removal by co-precipitation or the throwing out with molysite, and its reaction is as follows:
Fe→Fe
2++2e
-
Under alkalescence or neutrallty condition: Fe
2++ 2OH
-→ Fe (OH)
2
Under acidic conditions: 4Fe
2++ O
2+ 2H
2O → 4Fe
3++ 4OH
-
Sb
5++2Fe
2+→Sb
3++2Fe
3+
Sb
3++Fe
3++3OH
-→Sb
3+Fe(OH)
3
Beneficial effect:
(1) by coupling iron plate electrode (anode) and copper coin or nickel plate reductibility electrode (negative electrode), realization is reduced to trivalent antimony with quinquevalence antimony, produce iron ion by the anode dissolution method and realize and antimonious coagulation and co-precipitation synergy, make that in water, the quinquevalence antimony pollutent obtains effectively purifying removal.
(2) ferrous ion of chemical original position generation, under acidic conditions, have strong reductibility.Not only can reduce the oxidizing potential in electro-chemical systems, also can realize antimonic reduction.
(3) electrochemical method of the present invention not only can effectively be removed quinquevalence antimony, can also remove the trivalent antimony pollutent.
Specific embodiment
Embodiment 1
In electrochemical reactor, iron plate is anode, and copper coin is negative electrode, and the interpole gap of iron plate electrode and copper coin negative electrode is 1 centimetre, and polar plate area and staying water are long-pending than being 1/2 (m
2/ m
3).Adopt direct supply to power, current density is 15A/m
2Preparation contains Sb
3+And Sb
5+Pending water, Sb wherein
5+And Sb
3+Concentration is respectively 60 μ g/L and 20 μ g/L, regulates the pH value to 3.5 of water.Pending water is pumped in electrochemical reactor, and the electrochemical reaction treatment time is 30 minutes.Under the aforesaid operations condition, the Sb of water after processing
5+And Sb
3+The removal result is as shown in table 1.Can find out, in effluent quality, antimony content is lower than China's " drinking water sanitary standard " GB5749-2006) the middle antimony limiting concentration 5 μ g/L that stipulate.
The electrochemical treatment result of table 1: embodiment 1
| Detect index | Before processing | After processing |
| Sb 5+(μg/L) | 60 | 2.3 |
| Sb 3+(μg/L) | 20 | 1.2 |
Embodiment 2
In electrochemical reactor, iron plate is anode, and the nickel plate is negative electrode, and the polar plate spacing of iron plate electrode and reducing electrode is 1.5 centimetres, and polar plate area and staying water are long-pending than being 2/3 (m
2/ m
3).Adopt direct supply to power, current density is 20A/m
2Sb in pending water
3+And Sb
5+Concentration is respectively 35 μ g/L and 12 μ g/L, regulates the pH value to 5.6 of water.Pending water is pumped into electrochemical reactor, and the electrochemical treatment time is 20 minutes.Under the aforesaid operations condition, Sb in water after processing
5+And Sb
3+The removal result is as shown in table 2.Can find out, in effluent quality, antimony content is lower than China's " drinking water sanitary standard " GB5749-2006) the middle antimony limiting concentration 5 μ g/L that stipulate.
The electrochemical treatment result of table 2: embodiment 2
| Detect index | Before processing | After processing |
| Sb 5+(μg/L) | 35 | 2.0 |
| Sb 3+(μg/L) | 12 | 0.5 |
Claims (7)
1. a method of utilizing electrochemical method to remove quinquevalence antimony pollutent in water, comprise the steps:
In electrochemical reactor, ferroelectric very anode is set, copper coin or nickel plate are negative electrode; The pH value that will contain the pending water of quinquevalence antimony pollutent is adjusted to 3-7 and passes in electrochemical reactor, and the adjusting current density is 10-30A/m
2, polar plate area and staying water are long-pending is 1/2-1m
2/ m
3, polar plate spacing is that 1-8 centimetre, electrochemical treatment time are 10-40 minute; Adopt DC power supply.
2. the method for utilizing electrochemical method to remove quinquevalence antimony pollutent in water according to claim 1, is characterized in that the described pH value that contains the pending water of quinquevalence antimony pollutent is adjusted to 3-6.
3. the method for utilizing electrochemical method to remove quinquevalence antimony pollutent in water according to claim 1 and 2, is characterized in that the described pH value that contains the pending water of quinquevalence antimony pollutent is adjusted to 3,3.5,4,5 or 5.6.
4. the method for utilizing electrochemical method to remove quinquevalence antimony pollutent in water according to claim 3, is characterized in that described current density is 10-20A/m
2
5. the method for utilizing electrochemical method to remove quinquevalence antimony pollutent in water according to claim 4 is characterized in that described current density is 10,15 or 20A/m
2
6. the method for utilizing electrochemical method to remove quinquevalence antimony pollutent in water according to claim 1, is characterized in that described polar plate spacing is 1-3 centimetre.
7. the application that utilizes method antimony pollution thing in removing water of quinquevalence antimony pollutent in electrochemical method removal water according to claim 1.
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| CN103159300B CN103159300B (en) | 2015-03-11 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103408108A (en) * | 2013-07-26 | 2013-11-27 | 中国科学院生态环境研究中心 | Method for quickly removing pentavalent antimony pollutant in water by combining sodium sulfite and electrochemistry |
| CN104724797A (en) * | 2014-12-16 | 2015-06-24 | 中国科学院生态环境研究中心 | Method for removing pentavalent antimony pollutants in water through manganese ion enhanced electrochemistry |
| CN106396001A (en) * | 2016-10-26 | 2017-02-15 | 中国电建集团华东勘测设计研究院有限公司 | Method for removing pentavalent antimony contaminants from water and fuel cell |
| CN108193478A (en) * | 2018-01-23 | 2018-06-22 | 绵阳市聚合新材料有限公司 | A kind of catalyst wash method of Polyester Fibers |
| CN108560021A (en) * | 2018-04-13 | 2018-09-21 | 中国科学院生态环境研究中心 | A kind of method that photoelectric coupling recycles simple substance antimony from quinquevalence antimony waste water |
| CN109304365A (en) * | 2018-12-03 | 2019-02-05 | 南京迪天高新产业技术研究院有限公司 | A kind of Working solution prescription of electro reclamation antimony pollution soil and application |
| CN110182912A (en) * | 2019-07-08 | 2019-08-30 | 南昌航空大学 | A kind of electrochemical method removing trivalent Sb |
| CN116199366A (en) * | 2022-12-27 | 2023-06-02 | 广东沃杰森环保科技股份有限公司 | Treatment method of antimony-containing sewage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103408108A (en) * | 2013-07-26 | 2013-11-27 | 中国科学院生态环境研究中心 | Method for quickly removing pentavalent antimony pollutant in water by combining sodium sulfite and electrochemistry |
| CN103408108B (en) * | 2013-07-26 | 2014-09-10 | 中国科学院生态环境研究中心 | Method for quickly removing pentavalent antimony pollutant in water by combining sodium sulfite and electrochemistry |
| CN104724797A (en) * | 2014-12-16 | 2015-06-24 | 中国科学院生态环境研究中心 | Method for removing pentavalent antimony pollutants in water through manganese ion enhanced electrochemistry |
| CN106396001A (en) * | 2016-10-26 | 2017-02-15 | 中国电建集团华东勘测设计研究院有限公司 | Method for removing pentavalent antimony contaminants from water and fuel cell |
| CN108193478A (en) * | 2018-01-23 | 2018-06-22 | 绵阳市聚合新材料有限公司 | A kind of catalyst wash method of Polyester Fibers |
| CN108560021A (en) * | 2018-04-13 | 2018-09-21 | 中国科学院生态环境研究中心 | A kind of method that photoelectric coupling recycles simple substance antimony from quinquevalence antimony waste water |
| CN109304365A (en) * | 2018-12-03 | 2019-02-05 | 南京迪天高新产业技术研究院有限公司 | A kind of Working solution prescription of electro reclamation antimony pollution soil and application |
| CN110182912A (en) * | 2019-07-08 | 2019-08-30 | 南昌航空大学 | A kind of electrochemical method removing trivalent Sb |
| CN116199366A (en) * | 2022-12-27 | 2023-06-02 | 广东沃杰森环保科技股份有限公司 | Treatment method of antimony-containing sewage |
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