CN102496733A - Method for accelerating degradation of seabed organic pollutants by microbiological fuel cell catalysis - Google Patents
Method for accelerating degradation of seabed organic pollutants by microbiological fuel cell catalysis Download PDFInfo
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Abstract
The invention provides a method for accelerating degradation of seabed organic pollutants by microbiological fuel cell catalysis. By adoption of tandem-type anode and modified anode, current density is raised, so as to accelerate degradation of seabed pollutants and raise the degradation efficiency by more than two times. The method provided by the invention can be used to effectively accelerate the degradation of seabed pollutants, has advantages of no proton exchange membrane, low preparation cost, convenient installation, simple structure, obvious effects of depredating wastes, green and environmental protection, and is easy for commercial popularization. The invention can be used for treating seabed organic pollutants.
Description
Affiliated technical field
The invention belongs to the marine environmental protection field, relate to seabed organic pollutant degradation method, relate more specifically to use the method that the seabed microbial fuel cells system is accelerated the seabed organic pollutant degradation speed and the while recovery section energy.
Background technology
(Microbial Fuel Cell is a kind ofly to utilize microbe to make catalyst MFC) to microbiological fuel cell, the chemical energy in the organic substance is changed into the device of electric energy.The basic functional principle of MFC is: under anode chamber's anaerobic environment; Organic substance decomposes under microbial action and discharges electronics and proton; Electronics relies on suitable electron transfer mediator between biological components and anode, effectively to transmit, and be delivered to negative electrode through external circuit and form electric current, and proton is delivered to negative electrode through PEM; Oxidant (being generally oxygen) obtains electronics at negative electrode and is reduced, and is combined into water with proton.This quasi-microorganism fuel cell needs expensive PEM and noble metal catalyst, and need cultivate microorganism fungus kind, is usually used in city domestic sewage and handles, and can't be applied to marine environmental protection, particularly the processing of seabed organic pollution.
The seabed microbiological fuel cell is a kind of special and microbiological fuel cell with actual application value.It is a kind of novel energy device, is again a kind of instrument of efficiently curbing environmental pollution.Its operation principle is: anode is put into ooze, and negative electrode is put into seawater, and microbiological oxidation organic substance and inorganic matter produce electronics in the ooze, and electron transport arrives negative electrode through external circuit then to anode, thereby forms complete loops, produces electric current.R Alberte et al 2005 patent (US patent 691384B1,2005) discloses a kind of apparatus and method of utilizing the seabed microbiological fuel cell to produce electric energy.LM Tender and D Low (2009) discloses a kind of manganese metal anode that utilizes, the seabed microbial fuel cell unit of formation.
As everyone knows, environmental pollution and energy shortage are two hang-ups in the world, also are two most important factor of the following human kind sustainable development of restriction.On the one hand, it is serious day by day that the oil pollution that causes is leaked in submarine oil exploitation, and the Gulf of Mexico production platform that takes place in the recent period leaks and the 19-3 oil field leakage of oil of Peng Lai, Bohai Sea Gulf has caused serious marine pollution especially; On the other hand, along with mankind's activity and emission thereof constantly get into the ocean, marine environment goes from bad to worse, and pollutant is on the increase in the ooze, causes body eutrophication constantly to aggravate.No matter human comings and goings produced pollution thing is in the past or now, near the water body all being disposed to, finally imports the ocean.For the majority of organic pollutants thing, no matter point source still is the non-point source discharging, all can finally be deposited in basic sediment by enrichment through the absorption and the settlement action of Suspended Particles in Water, forms the seabed organic pollution.Existing research shows that staiing deposit both can cause benthic direct death (acute toxicity rank), also can be through food chain transmission and amplification, to biology and the chronic healthy negative effect of human generation that is positioned at the better nutritivity chain.Wherein, edible contaminated fish, shrimps, shellfish and algae make the mankind increase ill possibility.At present, traditional mud is main with landfill, and a spot of compost and burning are arranged.Traditional sludge processing method difficulty is big, and expense is high, is prone to cause secondary pollution, can't penetration and promotion.People have also developed the processing method of many microbial degradations; But because the open environment and the flowability of ocean; Can't apply culture medium and bacterial classification and bacterial classification low survival rate under real extra large environment and expensive cultivation fee usefulness thereof; Conventional microbial degradation method can't satisfy the improvement of seabed organic pollution, and it is low to seek cost, and effective method for separating polluted particles is extremely urgent.
Bacterium and some other monoids of not naming of often containing Firmicutes, Bacteroidetes, actinomyces door and Proteobacteria in the mud of seabed.Existing report shows; The electrogenesis bacterial species on bottom sediment anode of microbial fuel cell surface except the Shiva Salmonella, the bacillus isotype bacterial classification, also comprise other bacterium such as Aeromonas hydrophila (Aeromonas hydrophila), desulfurization leaf Cordycepps (Desulfobulbaceae), pseudomonad (Pseudomonas) etc.Mostly these several types of electrogenesis bacterium are facultative heterotrophic bacteria, need to decompose humus and come electrogenesis.Except the above-mentioned electrogenesis bacterium of mentioning, the bacterial classification of d-distortion Gammaproteobacteria, β-distortion Gammaproteobacteria and Bacteroidetes also can enrichments in a large number on electrode, become the dominant bacteria on the electrode.Naturally the bacterium majority that exists in these oozes can decompose the organic substance in the pollutant of seabed.
According to above-mentioned analysis, the seabed microbial fuel cells system is placed anode through the design of reasonable science in submarine sedimentary strata, place negative electrode in the seawater, under the channel status, on the one hand; The electronics that microbial degradation produces is derived the generation electric current, degraded fast by microbe thereby quicken the interior organic pollution of ooze; On the other hand, be rich in salinity in the seawater, ionic conductivity is high, and system's internal resistance is little, helps collecting electric energy.
The purpose of invention
The present invention utilizes the seabed microbiological fuel cell, adopts the tandem anode, improves current density, and the degraded of microbe to the seabed organic pollution quickened in electro-catalysis, set up a kind of seabed organic pollution electro-catalysis accelerated degradation method.
The content of invention
In order to solve the problem of the existence that has seabed organic pollution processing now; The present invention utilizes the seabed microbiological fuel cell, adopts tandem anode and modified anode, improves current density; Accelerate the seabed organic pollutant degradation; Both reduce seabed organic pollution processing cost, reduced environmental pollution, reclaimed the part energy again.
The present invention realizes through following technical scheme.
The first step: the pretreatment process of electrode.
Electrode by acetone sonicated 10～30min, soaks 40～120min after polishing repeatedly with sand paper respectively in 0.1～1mol/L hydrochloric acid solution, soak repeatedly until the pH of solution value with pure water no longer to change.Electrode is put into air dry oven, and 40～150 ℃ dry down, with epoxy sealing electrode and lead junction, makes subsequent use seabed microorganism fuel cell cathode and anode.
Second step: the modification operation of electrode.For improving seabed microbiological fuel cell output current and anode surface current density, can pass through oxidant (H
2SO
4/ HNO
3Nitration mixture and Fenton reagent) antianode carries out oxidation processes; Also can comprise that a kind of and polytetrafluoroethylene in camphorsulfonic acid doped polyaniline composite material, sulfonated polyaniline composite material, sulfonated polyaniline manganate composite material, sulfonated polyaniline vanadate composite material, the tri-iron tetroxide/polyaniline composite material mixes with carbon dust and composite material; Be applied to electrode surface, can also electrode be dipped in the pyrocatechol violet solution and modify through row.Clean at last, electrode is put into air dry oven, 40～150 ℃ dry down, with epoxy sealing electrode and lead junction, makes the seabed anode of microbial fuel cell through modifying.
The 3rd step: the assembling procedure of battery system.
Series connection polylith anode makes total anode output end, and anode output end is imbedded the 5～100cm position under seabed organic pollution/contact with sea water face, and negative electrode places under the sea water/atmosphere contact-making surface greater than the 1cm position.
The 4th step: the startup operation of battery.
Adopt three-electrode system to measure electrode potential, wherein, the reference electrode that places seawater is a saturated calomel electrode; Treat anode potential stabilization-below the 350mV; Cathode potential stabilization can connect the lead of anode and negative electrode when 250mV is above, confirm to start battery system.
The 5th step: seabed organic pollution accelerated degradation operation.
Operation seabed microbiological fuel cell, anode is in time transferred to negative electrode with the electronics that electrogenesis bacterium decomposing organic matter produces, and combines with the proton and the oxygen atom at negative electrode place, generates water, accelerates the degradation process of microbe to organic pollution.
The 6th step: utilization of power operation.
The compact electronic device (like clock and watch, calculator, broadcast receiver etc.) of on microbial fuel cells system loop, seabed, connecting is realized the utilization of electric energy.
The 7th step: Method for Measuring Organic Carbon operation in the pollutant.
With organic carbon content in the sedimentary deposit before and after the microbial fuel cells system of TOC analysis-e/or determining operation seabed.With the sample acidifying, place oven for drying earlier, adopt HT1300 method mensuration among the TOC, the concentration that record this moment is organic carbon content.
The effect of invention
Through present technique, utilize the seabed microbial fuel cells system, quickened microbial degradation seabed organic pollution, be more than 2.3 times of seabed organic pollution natural degradation speed, single seabed microbiological fuel cell can provide the voltage of 0.1～1.1V.
The simple declaration of accompanying drawing and accompanying drawing
Fig. 1 seabed microbial fuel cells system quickens seabed organic pollutant degradation device figure
Graphic extension: 1 anode; 2 negative electrodes; 3 voltmeters; 4 compact electronic devices (like clock and watch, calculator, broadcast receiver etc.); 5 ammeters; 6 leads
Fig. 2 organic carbon degradation effect figure
Fig. 3 petroleum pollution degradation design sketch
Embodiment
Instance 1: present embodiment is used to explain that graphite cake anode seabed microbial fuel cells system quickens the seabed organic pollutant degradation.
Getting specification is the graphite cake of 8cm (length) * 8cm (wide) * 1cm (thick), use 380,800 and 1000 order sand paperings respectively after, acetone sonicated 10min; In the 1mol/L hydrochloric acid solution, soak 90min, wash repeatedly, no longer change until the pH of solution value with pure water; Put into air dry oven; Dry 8h under 70 ℃, epoxy sealing electrode and lead junction make seabed microorganism fuel cell cathode and anode.
4 anodes of connecting make the total output of anode, and anode output end is imbedded 5cm place under seawater/ooze interface, and negative electrode places 5cm place on seawater/ooze interface; Adopt three-electrode system to measure electrode potential; Wherein, placing the reference electrode of seawater is saturated calomel electrode, treat anode potential stabilization-below the 350mV; Cathode potential stabilization can confirm to start battery system when 250mV is above.
This seabed microbial fuel cells system can provide the voltage of 0.668V.
With organic carbon content in the sedimentary deposit before and after the HT1300 method mensuration system operation in the TOC analyzer.The result shows that this seabed microbiological fuel cell operation is after 50 days, and the content of organic carbon has descended 26.7% in the organic pollution of seabed, is 2.3 times of seabed organic pollution natural degradation efficient.
Instance 2: present embodiment is used to explain H
2SO
4/ HNO
3The seabed microbial fuel cells system of nitration mixture modified graphite rod anode quickens the seabed organic pollutant degradation.
H
2SO
4/ HNO
3Nitration mixture modified graphite rod anode preparation.Getting specification is the graphite rod of 5cm (length) * 1cm (diameter); After using 380,800 and 1000 order sand paperings respectively; Acetone sonicated 20min; In the 1mol/L hydrochloric acid solution, soak 90min, it is that 3: 1 49% the sulfuric acid and the mixed solution of 32% red fuming nitric acid (RFNA) soak 20min that ready graphite-rod anode is put into volume ratio, and reaction temperature is 50～70 ℃.Electrode after handling is taken out from above-mentioned solution, and pure water is soaking and washing repeatedly, no longer changes until the pH of solution value.Electrode is put into air dry oven, 80 ℃ of following dry 10h, epoxy sealing electrode and lead junction make H
2SO
4/ HNO
3Nitration mixture modified graphite rod anode.
Seabed microbial fuel cells system negative electrode preparation.Getting specification is the graphite cake of 5cm (length) * 6cm (wide) * 1cm (thick); After using 380,800 and 1000 order sand paperings respectively, acetone sonicated 20min soaks 90min in the 1mol/L hydrochloric acid solution; Negative electrode with pure water soaking and washing repeatedly, is no longer changed until the pH of solution value.At last, electrode is put into air dry oven, 80 ℃ of following dry 10h, epoxy sealing electrode and lead junction make seabed microbial fuel cells system negative electrode.
3 groups of HNO3/H connect
2SO
4Nitration mixture modified graphite rod anode makes the total output of anode, and the total output of anode is imbedded 5cm place under seawater/ooze interface, and negative electrode places 5cm place on seawater/ooze interface; Adopt three-electrode system to measure electrode potential; Wherein, placing the reference electrode of seawater is saturated calomel electrode, treat anode potential stabilization-below the 350mV; Cathode potential stabilization can confirm to start battery system when 250mV is above.
This seabed microbial fuel cells system can provide the voltage of 0.702V.
With organic carbon content in the sedimentary deposit before and after the HT1300 method mensuration system operation in the TOC analyzer.The result shows that this seabed microbial fuel cells system operation is after 50 days, and the content of organic carbon has descended 58.9% in the organic pollution of seabed, is 5 times of seabed organic pollution natural degradation efficient.
Instance 3: present embodiment is used to explain that the seabed microbial fuel cells system of Fenton reagent modified carbon fiber anode quickens the seabed organic pollutant degradation.
Fenton reagent modified carbon fiber anode preparation.Get the 20g carbon fiber, acetone sonicated 30min soaks 90min in the 1mol/L hydrochloric acid solution, with pure water soaking and washing repeatedly, no longer changes until the pH of solution value.The carbon fiber anode is put into beaker, add 200mL1mol/L FeSO
4Solution, adjustment pH=3 adds 240mL concentration and is 30% H then
2O
2Solution, sonicated 10min under the room temperature with pure water soaking and washing repeatedly, no longer changes until the pH of solution value.At last, electrode is put into air dry oven, dry 10h under 80 ℃ with epoxy sealing electrode and lead junction, makes Fenton reagent modified carbon fiber anode.
Seabed microorganism fuel cell cathode preparation.Getting specification is the graphite cake of 8cm (length) * 8cm (wide) * 1cm (thick); With 380,800 and 1000 order sand paperings, acetone sonicated 30min soaks 90min in the 1mol/L hydrochloric acid solution; With pure water soaking and washing repeatedly, no longer change until the pH of solution value.Electrode is put into air dry oven, and 80 ℃ of following dry 10h with epoxy sealing electrode and lead junction, make the seabed microorganism fuel cell cathode.
The 4 groups of carbon fibers of connecting make the total output of anode, and anode output end is imbedded 5cm place under seawater/ooze interface, and the carbon fiber negative electrode places 5cm place on seawater/ooze interface; Adopt three-electrode system to measure electrode potential; Wherein, placing the reference electrode of seawater is saturated calomel electrode, treat anode potential stabilization-below the 350mV; Cathode potential stabilization can confirm to start battery system when 250mV is above.
This seabed microbial fuel cells system can provide the voltage of 0.683V.
With organic carbon content in the sedimentary deposit before and after the HT1300 method mensuration system operation in the TOC analyzer.The result shows that microbial fuel cells system operation in seabed is after 50 days, and the content of organic carbon has descended 35.7% in the organic pollution of seabed, is 3 times of seabed organic pollution natural degradation efficient.
Instance 4: present embodiment is used to explain that the carbon felt material makes the seabed microbial fuel cells system of anode and quicken petroleum pollution degradation.
The carbon felt material is made anode preparation.Getting specification is the carbon felt of 5cm (length) * 5cm (wide), with acetone sonicated 10min, in the 1mol/L hydrochloric acid solution, soaks 90min; Pure water is soaking and washing repeatedly; No longer change until the pH of solution value, put into air dry oven, 80 ℃ of following dry 10h; Epoxy sealing electrode and lead junction make the carbon felt material and make anode.
Seabed microorganism fuel cell cathode preparation.Getting specification is the graphite cake of 8cm (length) * 8cm (wide) * 1cm (thick), with 380,800 and 1000 order sand paperings, and acetone sonicated 10min; In the 1mol/L hydrochloric acid solution, soak 90min, pure water is soaking and washing repeatedly, no longer changes until the pH of solution value; Put into air dry oven; Dry 10h under 80 ℃ with epoxy sealing electrode and lead junction, makes the seabed microorganism fuel cell cathode.
The 5 graphite felt anodes of connecting make the total output of anode, and anode output end is imbedded 5cm place under seawater/ooze interface, and this ooze mixes with excessive crude oil; Negative electrode places 5cm place on seawater/ooze interface, adopts three-electrode system to measure electrode potential, wherein; The reference electrode that places seawater is a saturated calomel electrode; Treat anode potential stabilization-below the 350mV, cathode potential stabilization can confirm to start battery system when 250mV is above.
Through measuring, the seabed microbial fuel cells system can provide the voltage about 0.7V.
With organic carbon content in the sedimentary deposit before and after the HT1300 method mensuration system operation in the TOC analyzer.The result shows that this seabed microbial fuel cells system operation is after 24 days, and energising device PetroChina Company Limited. pollutant has descended 33.3%; Petroleum pollution has only descended 3.3% under the organic pollution natural degradation situation of seabed, is 10 times of seabed organic pollution natural degradation efficient.
Instance 5: present embodiment is used to explain that pyrocatechol violet modification carbon cloth anode seabed microbiological fuel cell quickens the seabed organic pollutant degradation.
Pyrocatechol violet is modified the carbon cloth anode preparation.Getting specification is the carbon cloth of 8cm (length) * 8cm (wide) * 0.2cm (thick), and acetone sonicated 15min soaks 90min in the 1mol/L hydrochloric acid solution, and pure water is soaking and washing repeatedly, no longer changes until the pH of solution value.Carbon cloth is soaked in the pyrocatechol violet PBS (pH=7) of 10-4mol/L, stirring and adsorbing 48h, distilled water is cleaned.At last, all electrodes are put into air dry oven, dry 10h under 80 ℃ with epoxy sealing electrode and lead junction, makes pyrocatechol violet and modifies the carbon cloth anode.
Seabed microorganism fuel cell cathode preparation.Getting specification is the carbon plate of 7cm (length) * 7cm (wide) * 1cm (thick), with 380,800 and 1000 order sand paperings.Acetone sonicated 15min soaks 90min in the 1mol/L hydrochloric acid solution, pure water is soaking and washing repeatedly, no longer changes until the pH of solution value.Dry 10h under 80 ℃ with epoxy sealing electrode and lead junction, makes the seabed microorganism fuel cell cathode.
6 anodes of connecting make the total output of anode, and anode output end is imbedded 5cm place under seawater/ooze interface; Negative electrode places 5cm place on seawater/ooze interface, adopts three-electrode system to measure electrode potential, wherein; The reference electrode that places seawater is a saturated calomel electrode; Treat anode potential stabilization-below the 350mV, cathode potential stabilization can confirm to start battery system when 250mV is above.
Through measuring, the seabed microbial fuel cells system can provide the voltage about 0.7V.
With organic carbon content in the sedimentary deposit before and after the HT1300 method mensuration system operation in the TOC analyzer.The result shows that microbial fuel cells system operation in seabed is after 50 days, and the content of organic carbon has descended more than 30% in the energising device, is more than 2.3 times of seabed organic pollution natural degradation efficient.
Instance 6: present embodiment is used to explain that camphorsulfonic acid doped polyaniline composite anode seabed microbiological fuel cell quickens the seabed organic pollutant degradation.
The preparation of camphorsulfonic acid doped polyaniline composite anode.Getting specification is the graphite cake of 8cm (length) * 8cm (wide) * 1cm (thick).After the graphite cake electrode was used 380,800 and 1000 order sand paperings respectively, acetone sonicated 10min soaked 90min in the 1mol/L hydrochloric acid solution, and pure water is soaking and washing repeatedly, no longer changed until the pH of solution value.Using mass fraction is that 1% polytetrafluoroethylsolution solution stirs into pasty state with carbon dust 0.25g and camphorsulfonic acid/polyaniline composite material 0.25g; It is applied to electrode surface; Put into air dry oven; Dry 10h under 80 ℃ with epoxy sealing electrode and lead junction, makes camphorsulfonic acid doped polyaniline composite anode.
Getting specification is the graphite cake of 8cm (length) * 8cm (wide) * 1cm (thick).After 380,800 and 1000 order sand paperings,, in the 1mol/L hydrochloric acid solution, soak 90min by acetone sonicated 10min; Pure water is soaking and washing repeatedly; No longer change until the pH of solution value, put into air dry oven, 80 ℃ of following dry 10h; Epoxy sealing electrode and lead junction make the seabed microorganism fuel cell cathode.
7 anodes of connecting make the total output of anode, and anode output end is imbedded 5cm place under seawater/ooze interface, and negative electrode places 5cm place on seawater/ooze interface; Adopt three-electrode system to measure electrode potential; Wherein, placing the reference electrode of seawater is saturated calomel electrode, treat anode potential stabilization-below the 350mV; Cathode potential stabilization can confirm to start battery system when 250mV is above.
Through measuring, the seabed microbial fuel cells system can provide the voltage about 0.7V.
With organic carbon content in the sedimentary deposit before and after the HT1300 method mensuration system operation in the TOC analyzer.The result shows that microbial fuel cells system operation in seabed is after 50 days, and pollutant has descended 40.3% in the energising device, is 3.4 times of seabed organic pollution natural degradation efficient.
Instance 7: present embodiment is used to explain that sulfonated polyaniline composite anode seabed microbiological fuel cell quickens the seabed organic pollutant degradation.
The preparation of sulfonated polyaniline composite anode.Getting specification is the graphite cake of 8cm (length) * 8cm (wide) * 1cm (thick); After 380,800 and 1000 order sand paperings, acetone sonicated 10min soaks 90min in the 1mol/L hydrochloric acid solution; Pure water is soaking and washing repeatedly, no longer changes until the pH of solution value.Using mass fraction is that 1% polytetrafluoroethylsolution solution stirs into pasty state with carbon dust 0.25g and sulfonated polyaniline anode material 1g; Be applied to electrode surface; Electrode is put into air dry oven; Dry 10h under 80 ℃ with epoxy sealing electrode and lead junction, makes the sulfonated polyaniline composite anode.
Seabed microorganism fuel cell cathode preparation.Getting specification is the carbon paper of 5cm (length) * 5cm (wide), with acetone sonicated 10min, in the 1mol/L hydrochloric acid solution, soaks 90min, and pure water is soaking and washing repeatedly, no longer changes until the pH of solution value.Put into air dry oven, 80 ℃ of following dry 10h with epoxy sealing electrode and lead junction, make the seabed microorganism fuel cell cathode.
8 anodes of connecting make the total output of anode, and anode output end is imbedded 5cm place under seawater/ooze interface, and negative electrode places 5em place on seawater/ooze interface; Adopt three-electrode system to measure electrode potential; Wherein, placing the reference electrode of seawater is saturated calomel electrode, treat anode potential stabilization-below the 350mV; Cathode potential stabilization can confirm to start battery system when 250mV is above.
Through measuring, the seabed microbial fuel cells system can provide the voltage about 0.7V.
With organic carbon content in the sedimentary deposit before and after the HT1300 method mensuration system operation in the TOC analyzer.The result shows that microbial fuel cells system operation in seabed is after 50 days, and pollutant has descended 38.8% in the energising device, is 3.3 times of seabed organic pollution natural degradation efficient.
Instance 8: present embodiment is used to explain that sulfonated polyaniline manganate composite anode seabed microbiological fuel cell quickens the seabed organic pollutant degradation.
The preparation of sulfonated polyaniline manganate composite anode.Getting specification is the graphite cake of 8cm (length) * 8cm (wide) * 1cm (thick); After using 380,800 and 1000 order sand paperings respectively, acetone sonicated 10min soaks 90min in the 1mol/L hydrochloric acid solution; Pure water is soaking and washing repeatedly, no longer changes until the pH of solution value.Using mass fraction is that 1% polytetrafluoroethylsolution solution stirs into pasty state with carbon dust 0.25g and sulfonated polyaniline manganate 0.25g; Be applied to electrode surface, put into air dry oven, 80 ℃ of following dry 10h; Epoxy sealing electrode and lead junction make sulfonated polyaniline manganate composite anode.
Seabed microorganism fuel cell cathode preparation.Getting specification is the graphite cake of 8cm (length) * 8cm (wide) * 1cm (thick).After the graphite cake electrode was used 380,800 and 1000 order sand paperings respectively, acetone sonicated 10min soaked 90min in the 1mol/L hydrochloric acid solution; Pure water is soaking and washing repeatedly; No longer change until the pH of solution value, put into air dry oven, 80 ℃ of following dry 10h; Epoxy sealing electrode and lead junction make the seabed microorganism fuel cell cathode.
4 anodes of connecting make the total output of anode, and anode output end is imbedded 5cm place under seawater/ooze interface, and negative electrode places 5cm place on seawater/ooze interface; Adopt three-electrode system to measure electrode potential; Wherein, placing the reference electrode of seawater is saturated calomel electrode, treat anode potential stabilization-below the 350mV; Cathode potential stabilization can confirm to start battery system when 250mV is above.
Through measuring, the seabed microbial fuel cells system can provide the voltage about 0.7V.
With organic carbon content in the sedimentary deposit before and after the HT1300 method mensuration system operation in the TOC analyzer.The result shows that microbial fuel cells system operation in seabed is after 50 days, and organic carbon content has descended 31.8% in the energising device, is 2.7 times of seabed organic pollution natural degradation efficient.
Instance 9: present embodiment is used to explain that sulfonated polyaniline vanadate composite anode seabed microbiological fuel cell quickens the seabed organic pollutant degradation.
The preparation of sulfonated polyaniline vanadate composite anode.Getting specification is the graphite cake of 8cm (length) * 8cm (wide) * 1cm (thick); Use 380,800 and 1000 order sand paperings respectively, acetone sonicated 10min soaks 90min in the 1mol/L hydrochloric acid solution; Pure water is soaking and washing repeatedly, no longer changes until the pH of solution value.Using mass fraction is that 1% polytetrafluoroethylsolution solution stirs into pasty state with carbon dust 0.25g and sulfonated polyaniline vanadate 0.25g; Be applied to electrode surface; Put into air dry oven; Dry 10h under 80 ℃ with epoxy sealing electrode and lead junction, makes sulfonated polyaniline vanadate composite anode.
Seabed microorganism fuel cell cathode preparation.Getting specification is the graphite cake of 8cm (length) * 8cm (wide) * 1cm (thick), after 380,800 and 1000 order sand paperings, and acetone sonicated 10min; In the 1mol/L hydrochloric acid solution, soak 90min,, no longer change until the pH of solution value with pure water soaking and washing repeatedly; Put into air dry oven; Dry 10h under 80 ℃ with epoxy sealing electrode and lead junction, makes the seabed microorganism fuel cell cathode.
4 anodes of connecting make the total output of anode, and anode output end is imbedded 5cm place under seawater/ooze interface, and negative electrode places 5cm place on seawater/ooze interface; Adopt three-electrode system to measure electrode potential; Wherein, placing the reference electrode of seawater is saturated calomel electrode, treats anode. the position be stabilized in-below the 350mV; Cathode potential stabilization can confirm to start battery system when 250mV is above.
Through measuring, the seabed microbial fuel cells system can provide the voltage about 0.7V.
With organic carbon content in the sedimentary deposit before and after the HT1300 method mensuration system operation in the TOC analyzer.The result shows that microbial fuel cells system operation in seabed is after 50 days, and organic carbon has descended 36.5% in the energising device, is 3.1 times of seabed organic pollution natural degradation efficient.
Instance 10: present embodiment is used to explain that tri-iron tetroxide/polyaniline composite anode seabed microbiological fuel cell quickens the seabed organic pollutant degradation.
Tri-iron tetroxide/polyaniline composite anode preparation.The graphite cake of getting specification and be 4cm (length) * 7cm (wide) * 1cm (thick) with 380,800 and 1000 order sand paperings after; Acetone sonicated 10min; In the 1mol/L hydrochloric acid solution, soak 90min, pure water is soaking and washing repeatedly, no longer changes until the pH of solution value.Using mass fraction is that 1% polytetrafluoroethylsolution solution stirs into pasty state with carbon dust 0.5g and tri-iron tetroxide/polyaniline powder 0.5g; Be applied to the graphite cake surface; Put into air dry oven; Dry 10h under 80 ℃, epoxy sealing electrode and lead junction make tri-iron tetroxide/polyaniline composite anode.
Seabed microorganism fuel cell cathode preparation.Getting specification is the graphite cake of 5cm (length) * 6cm (wide) * 1cm (thick).After the graphite cake electrode was used 380,800 and 1000 order sand paperings respectively, acetone sonicated 10min soaked 90min in the 1mol/L hydrochloric acid solution; With pure water soaking and washing repeatedly; No longer change until the pH of solution value, put into air dry oven, 80 ℃ of following dry 10h; With epoxy sealing electrode and lead junction, make the seabed microorganism fuel cell cathode.
4 anodes of connecting make the total output of anode, and anode output end is imbedded 5cm place under seawater/ooze interface, and negative electrode places 5cm place on seawater/ooze interface; Adopt three-electrode system to measure electrode potential; Wherein, placing the reference electrode of seawater is saturated calomel electrode, treat anode potential stabilization-below the 350mV; Cathode potential stabilization can confirm to start battery system when 250mV is above.
Through measuring, the seabed microbial fuel cells system can provide the voltage about 0.7V.
With organic carbon content in the sedimentary deposit before and after the HT1300 method mensuration system operation in the TOC analyzer.The result shows that microbial fuel cells system operation in seabed was dyed thing in the energising device and descended 64.8% after 50 days; Be 5.5 times of seabed organic pollution natural degradation efficient.
More than specific embodiment of the present invention is illustrated, but protection content of the present invention is not only limited to above embodiment, in the technical field, the common knowledge of a GPRS just can be carried out various change in its technological main idea scope under of the present invention.
Claims (3)
1. the microbiological fuel cell catalysis accelerated degradation method of a seabed organic pollution is characterized in that utilizing the bottom sediment microbiological fuel cell to realize the electro-catalysis accelerated degradation of seabed organic pollution.
2. the described bottom sediment microbiological fuel cell of claim 1 is characterized in that by the total anode output end of a plurality of anode series connection formation.
3. the described anode of claim 2 is characterized in that being processed by any material with carbon element in graphite cake, graphite rod, carbon fiber, carbon felt, the carbon cloth.
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