CN104787860B - One utilizes Metal semi-fuel cells to process chromic method in waste water - Google Patents
One utilizes Metal semi-fuel cells to process chromic method in waste water Download PDFInfo
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- CN104787860B CN104787860B CN201510175576.6A CN201510175576A CN104787860B CN 104787860 B CN104787860 B CN 104787860B CN 201510175576 A CN201510175576 A CN 201510175576A CN 104787860 B CN104787860 B CN 104787860B
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Abstract
The present invention is to provide one utilizes Metal semi-fuel cells to process chromic method in waste water.Barrier film is used to separate composition reactor between cathode chamber and anode chamber, anode is positioned at the inside of anode chamber, negative electrode is positioned at the inside of cathode chamber, it is connected by wire between anode with negative electrode and is connected composition closed-loop path with load, described anode is the one in zinc, aluminum, calcium, magnesium, lithium, ferrum and alloy thereof, described negative electrode is graphite, chromate waste water is firstly introduced into cathode chamber, the solution of sea water or sodium chloride-containing is introduced anode chamber, anode chamber's inner anode dissolves ejected electron, being delivered to negative electrode by wire, Cr VI obtains electronics at cathode surface and is reduced into rapidly trivalent chromium.It is to electrochemical water treating method change that the present invention utilizes Metal semi-fuel cells to build electro-chemical systems processing waste water containing chrome, it is not required to additional electric energy, and electric energy can be produced while waste water processes, thus reduce cost of water treatment, there is the triple benefit of environment, society and economy.
Description
Technical field
The present invention relates to a kind of process for treating industrial waste water, specifically one utilizes Metal semi-fuel cells to process containing six
The method of valency chrome waste water.
Background technology
Along with industry and economic development, chromium and compound is as industries such as process hides, plating, metallurgy, paint, dyestuffs
Important source material, be used widely.But meanwhile inevitably resulting from chromate waste water in production process, these pollute
Thing is directly discharged in environment if the most treated, and water body can cause severe contamination, harm ecological environment and health.
In waste water, chromium ion is mainly presented in Cr (III), Cr (VI), and wherein Cr VI toxicity is very strong, and chromic poison
Property is the most small.Cr VI has effect carcinogenic, mutagenic to human body, is one of internationally recognized three kinds of carcinogenic metal objects,
One of 129 kinds of priority pollutants that Ye Shi U.S. Environmental Protection Agency (EPA) generally acknowledges.In the wastewater discharge standard of China, the concentration of regulation Cr (VI) is 0.
5mg/L, total chrome content must not exceed 1.5mg/L, and therefore the economical and efficient of chromate waste water processes is very important.Domestic
Outer researcher has carried out substantial amounts of research work in terms of route for treatment of chromium containing waste water, and current processing method includes absorption method, electrochemistry
Method, ion exchange, membrane separation process and bioanalysis, various processing methods all have its pluses and minuses.
Owing to the processing method of current chromate waste water all exists certain deficiency, thus change on the basis of former processing method
Entering and optimize, improving treatment effeciency, nontoxicization accelerating chromate waste water processes, and becomes a new research direction.
If the electrochemical treatment of waste water is the most promising a kind of technology in various processing method, it is to utilize unidirectional current to carry out
The process of solution oxide reduction reaction, is to utilize electrolyzer to process waste water, i.e. in electrolytic process, negative electrode ejected electron, makes to give up
In water, some cation is reduced because obtaining electronics, and negative electrode plays the effect of reducing agent.Anode obtains electronics, makes some the moon in waste water
Ion is oxidized because losing electronics, and anode plays the effect of oxidant.Pollutant in waste water aoxidize respectively at negative and positive the two poles of the earth
Reduction reaction or with electrode reaction product effect, be converted into harmless components and be separated off, the principle master of its processing waste water containing chrome
If first poisonous hexavalent chrome reduction to be become the trivalent chromium of low toxicity, then trivalent chromium precipitation is removed.Electrolyzer is utilized to process waste water
Electrochemical water treating method though there is the process advantages such as pollutant are in extensive range, treatment effeciency is high, secondary pollution is few, but it disappears
Consuming electric power, the shortcoming that processing cost is higher limits its large-scale use.
Using microbiological fuel cell to process waste water is study hotspot in recent years, and it produces electric energy, fall while processing waste water
The low processing cost of waste water, can realize the sustainable development of sewage disposal to greatest extent.Therefore utilize at sewage treatment area
Battery technology processes waste water and is undoubtedly the significant innovation of sewage disposal theory, has broad application prospects.
Metal semi-fuel cells (MSFC) is that to utilize metal (magnesium, aluminum etc.) be anode, with hydrogen peroxide or dissolved oxygen as oxidant
, have a kind of energy conversion device of fuel cell and battery characteristics concurrently.The anode of MSFC has a feature of battery, i.e. anode (as
Al, Mg etc.) it is consumed in battery discharge procedure, negative electrode has the feature of fuel cell, and i.e. oxidant is (such as O2、H2O2
Deng) it being continuously fed to negative electrode from outside, negative electrode itself does not consumes, therefore by this electricity between battery and fuel cell
Chemical energy converter device becomes " partly " fuel cell.It has that specific energy is high, discharge voltage big and stable, use safety,
Without the outstanding advantages such as ecological pollution and mechanical charge time be short.Metal semi-fuel cells is more higher than microbiological fuel cell has
Output voltage and electric current, therefore its cathode contamination thing reduction, detoxification speed faster, in hgher efficiency.
Summary of the invention
It is an object of the invention to provide one need not additional electric energy, produce electric energy while waste water processing, processing cost is low
Metal semi-fuel cells is utilized to process chromic method in waste water.
The object of the present invention is achieved like this:
Using barrier film to separate composition reactor between cathode chamber and anode chamber, anode is positioned at the inside of anode chamber, and negative electrode is positioned at cathode chamber
Inside, be connected by wire between anode with negative electrode and with load is connected form closed-loop path, described anode be zinc, aluminum, calcium,
One in magnesium, lithium, ferrum and alloy thereof, described negative electrode is graphite, and chromate waste water is firstly introduced into cathode chamber, by sea water or contain
The solution of sodium chloride introduces anode chamber, and anode chamber's inner anode dissolves ejected electron, wire be delivered to negative electrode, and Cr VI is at negative electrode
Surface obtains electronics and is reduced into rapidly trivalent chromium.
The present invention can also include:
1, it is provided with agitator at cathode chamber to be stirred.
2, the concentration of described sodium chloride solution is 0.7mol/L.
The present invention, using chromyl waste water as the fuel of negative electrode, builds Metal semi-fuel cells and processes chromyl waste water,
For the electrolyzer of prior art, need not additional electric energy, and electric energy can be produced while waste water processing, reduce
Processing cost, is a promising method.
Technical measure mainly includes that container, anode, negative electrode, described anode are zinc, aluminum, calcium, magnesium, lithium, ferrum etc.
One in metal and alloy thereof, described negative electrode is the one of the insoluble electrodes such as graphite, and described container is that reactor is the most double
Room Metal semi-fuel cells, reactor includes that cathode chamber and anode chamber, cathode chamber and lower end, anode chamber have water inlet, upper end respectively
Having outlet, anode to be positioned at the inside of anode chamber, negative electrode is positioned at the inside of cathode chamber, and two interpolars are connected by copper conductor, and with
Load connects composition closed-loop path.Use barrier film to separate between room, the two poles of the earth, agitator stirring can be provided with at cathode chamber, molten to ensure
The uniform of liquid mixes and efficiently produces electricity.
It is that chromate waste water is firstly introduced into cathode chamber that Metal semi-fuel cells processes the method containing industrial wastewaters such as Cr VIs, by sea water
Or the solution of sodium chloride-containing introduces anode chamber, anode chamber's inner anode dissolves ejected electron, wire be delivered to negative electrode, poisonous six
Valency chromium obtains electronics at cathode surface and is reduced into rapidly the trivalent chromium of low toxicity, reaches detoxification purpose.
It addition, the present invention is during processing waste water containing chrome, the electronics that anode autolysis produces is delivered to negative electrode by external circuit,
At cathode surface reduction of hexavalent chromium.Not only need not additional electric energy but also create electric energy simultaneously, so greatly reduce and be processed into
This.
The present invention utilizes Metal semi-fuel cells processing waste water containing chrome to have than the current microbiological fuel cell processing waste water containing chrome that utilizes
Preferably effect, reason is that the OCP of anode is more negative, makes whole processing system of battery produce higher output voltage, more greatly
Kinetic current, thus improve the water treatment effect of whole system.The sexavalence that initial concentration is 18mg/L is processed by the present invention
Chromium, processes after 80min, clearance up to about 82%, have treatment effect preferably, stable effluent quality, processing cost low etc.
Advantage, has broad application prospects.
It is to electrochemical water treating method one that the present invention utilizes Metal semi-fuel cells to build electro-chemical systems processing waste water containing chrome
Change, be not required to additional electric energy, and electric energy can be produced while waste water processes, thus reduce cost of water treatment, there is ring
The triple benefit of border, society and economy.
The present invention is possible not only to processing waste water containing chrome, apply also for other water has oxidizing property pollutant removal (as denitrogenation,
Dechlorination, Azo dye decol, Nitrobenzol conversion and uranium conversion etc.), effectively chemical energy can be converted into electric energy, obtain simultaneously
Preferably water treatment effect.
In the present invention, battery configuration uses dual chamber Metal semi-fuel cells, simple in construction, it is easy to combine, expand treatment scale, easily
In the optimization changing operating condition, beneficially battery.
Accompanying drawing explanation
Fig. 1 is the structural representation of battery of the present invention；
Fig. 2 is the treatment effect of Metal semi-fuel cells runtime chromate waste water of the present invention；
Fig. 3 is the Metal semi-fuel cells of the present invention synchronous electrogenesis performance when processing waste water.
Detailed description of the invention
Illustrate below in conjunction with the accompanying drawings and the present invention be described in more detail:
In conjunction with Fig. 1, the reactor composition of the present invention includes anode chamber 1 and cathode chamber 2, is separated by barrier film 3, two between room, the two poles of the earth
Electrode is respectively placed in anode chamber 1 and cathode chamber 2 is internal, and anode material 4 uses aluminium sheet, negative electrode 5 to use graphite cake.Dual chamber is anti-
Answering the anode chamber of device and cathode chamber lower end and upper end to be respectively equipped with water inlet 6,8 and outlet 7,9, cathode chamber uses magnetic force to stir
Mixing, two interpolars are connected by copper conductor, and with load 10, computer 11 is connected form closed-loop path, the range of accommodation of load be 1～
10000Ω。
When reactor runs, chromate waste water is entered cathode chamber 2, intermittent duty by cathode chamber water inlet 8, samples at interval of 20min
Analyze cathode chamber hexavalent chromium concentration, investigate chromic removal effect.The NaCl solution of 0.7mol/L adds anode chamber, at sun
Room, pole metal anode dissolves ejected electron, is then delivered to negative electrode by external circuit, and Cr VI poisonous on negative electrode obtains electronics quilt
It is reduced into the trivalent chromium of low toxicity, reaches the effect of detoxification.Owing to the reactor of the present invention is exactly Metal semi-fuel cells, therefore may be used
Produce electric energy when synchronization process waste water, reduce the processing cost of waste water.
Result of the test is as follows:
Fig. 2 is the treatment effect of Metal semi-fuel cells steady operation period chromate waste water of the present invention.As shown in Figure 2, at Cr VI
Reason concentration is 18mg/L, and when operation 20,80min, chromic clearance is respectively 51.1% and 82.4%, has preferably
Removal effect.
Fig. 3 is Metal semi-fuel cells synchronous electrogenesis performance when processing waste water containing chrome that the present invention builds.By changing external circuit
Connection resistance measurement power curve.From the figure 3, it may be seen that the peak power output of Metal semi-fuel cells is 23.5W/m3。
Therefore, the invention provides a kind of novel method utilizing Metal semi-fuel cells processing waste water containing chrome.This method has place
Reason low cost, synchronizes to produce the advantage of electric energy, is with a wide range of applications in actual applications.
Claims (3)
1. utilize Metal semi-fuel cells to process a chromic method in waste water, it is characterized in that: adopt between cathode chamber and anode chamber
Separating composition reactor with barrier film, anode is positioned at the inside of anode chamber, and negative electrode is positioned at the inside of cathode chamber, logical between anode and negative electrode
Crossing wire connect and be connected composition closed-loop path with load, described anode is in zinc, aluminum, calcium, magnesium, lithium, ferrum and alloy thereof
One, described negative electrode is graphite, and chromate waste water is firstly introduced into cathode chamber, and the solution of sea water or sodium chloride-containing is introduced anode
Room, anode chamber's inner anode dissolves ejected electron, wire is delivered to negative electrode, and Cr VI obtains electronics by rapidly also at cathode surface
Former one-tenth trivalent chromium.
The most according to claim 1 utilize Metal semi-fuel cells to process chromic method in waste water, it is characterized in that:
Cathode chamber is provided with agitator and is stirred.
The most according to claim 1 and 2 utilize Metal semi-fuel cells to process chromic method in waste water, it is characterized in that:
The concentration of described sodium chloride solution is 0.7mol/L.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510175576.6A CN104787860B (en) | 2015-04-14 | 2015-04-14 | One utilizes Metal semi-fuel cells to process chromic method in waste water |
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| CN201510175576.6A CN104787860B (en) | 2015-04-14 | 2015-04-14 | One utilizes Metal semi-fuel cells to process chromic method in waste water |
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| CN104787860A CN104787860A (en) | 2015-07-22 |
| CN104787860B true CN104787860B (en) | 2016-09-14 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105217800A (en) * | 2015-08-25 | 2016-01-06 | 南京工业大学 | Graphene/polypyrrole bioelectrode and preparation method and application thereof |
| CN105776434A (en) * | 2016-05-12 | 2016-07-20 | 苏州荣能环保科技有限公司 | Device for separating metal cations from sewage |
| CN106430433B (en) * | 2016-09-09 | 2022-12-13 | 沈阳工业大学 | Internal circulation type electrochemical organic waste water treatment device |
| CN107892363B (en) * | 2017-12-18 | 2020-07-24 | 清华大学 | Water treatment device and method for synchronously generating electricity and converting high-valence metal ions |
| CN109001270A (en) * | 2018-10-08 | 2018-12-14 | 兰州大学 | A kind of prior-warning device for hexavalent chromium concentration in industrial wastewater |
| CN110085895B (en) * | 2019-04-12 | 2020-09-29 | 华南师范大学 | Fluid battery and method for treating heavy metal ions and organic dye in wastewater by using fluid battery |
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| MX337890B (en) * | 2007-10-19 | 2016-03-10 | Univ Guanajuato | Solar energy-assisted process for treating effluents polluted with hexavalent chromium. |
| CN102887559B (en) * | 2011-07-21 | 2014-03-19 | 中国科学院生态环境研究中心 | Electrochemical reduction assistance-based biosorption integrated reactor and treatment method of hexavalent chromium-containing wastewater |
| CN103378361A (en) * | 2012-04-20 | 2013-10-30 | 尹华文 | Composite-electrode fuel cell |
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