CN102974602A - Heavy metal polluted soil remediation device and method - Google Patents
Heavy metal polluted soil remediation device and method Download PDFInfo
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- CN102974602A CN102974602A CN2012104929501A CN201210492950A CN102974602A CN 102974602 A CN102974602 A CN 102974602A CN 2012104929501 A CN2012104929501 A CN 2012104929501A CN 201210492950 A CN201210492950 A CN 201210492950A CN 102974602 A CN102974602 A CN 102974602A
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- bioleaching reactor
- control valve
- contaminated soil
- metal contaminated
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- 239000002689 soil Substances 0.000 title claims abstract description 55
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005067 remediation Methods 0.000 title abstract description 4
- 238000001914 filtration Methods 0.000 claims abstract description 17
- 238000005273 aeration Methods 0.000 claims abstract description 9
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 241000894006 Bacteria Species 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 229910052717 sulfur Inorganic materials 0.000 claims description 15
- 239000011593 sulfur Substances 0.000 claims description 15
- 238000002386 leaching Methods 0.000 claims description 14
- 230000001590 oxidative effect Effects 0.000 claims description 14
- 239000005864 Sulphur Substances 0.000 claims description 11
- 238000005276 aerator Methods 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000011081 inoculation Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 239000011541 reaction mixture Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 239000011148 porous material Substances 0.000 abstract 2
- 238000007599 discharging Methods 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 231100000614 poison Toxicity 0.000 description 3
- 230000007096 poisonous effect Effects 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 241000605118 Thiobacillus Species 0.000 description 2
- 230000012010 growth Effects 0.000 description 2
- 230000008635 plant growth Effects 0.000 description 2
- 238000009418 renovation Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000003802 soil pollutant Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 241000605222 Acidithiobacillus ferrooxidans Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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Abstract
The invention provides a heavy metal polluted soil remediation device. The device comprises a peristaltic pump, a bioleaching reactor, a micro-pore filtering column, an adjusting groove and a plant processing groove, which are sequentially connected with one another through a communication pipeline to form a ring, wherein a sample feeding opening is arranged at the top of the bioleaching reactor; an agitator is arranged inside the bioleaching reactor; an aeration device is arranged on the outer wall of the bioleaching reactor; a sample discharging opening is arranged at the bottom of the bioleaching reactor; an air outlet of the aeration device is arranged inside the bioleaching reactor; a first control valve is arranged between the bioleaching reactor and the micro-pore filtering column; a second control valve is arranged between the adjusting groove and the plant processing groove; and a third control valve is arranged at the bottom of the plant processing groove. The invention further provides a method for processing heavy metal polluted soil by the device. The device has the advantages of simple structure, convenience for use, low utilization cost, high processing efficiency and good processing effect.
Description
Technical field
The invention belongs to heavy-metal contaminated soil and repair the field, particularly a kind of device that utilizes bioleaching and plant absorption renovation of heavy metal polluted soil with combined also relates to the method for utilizing this device restoration of soil polluted by heavy metal.
Background technology
Human industry and Agricultural Activities cause in the environment pollution situation of heavy metal more and more serious, and these heavy metals have quite a few to remain in the soil, and ecological environment in serious threat.Have now the heavy metal pollution soil remediation method is mainly contained chemical leaching curing reparation, moving electric reparation, phytoremediation and microorganism reparation.
Chemical leaching curing rehabilitation cost is higher and easily produce secondary pollution, and moving electricity is repaired negative electrode can produce OH
-, be unfavorable for the heavy metal migration.
Phytoremediation is to absorb a kind of restorative procedure of removing Metal Pollution Study In Soils by plant growth, and remediation efficiency depends primarily on the activity of metal ion free state.Water plant such as large Piao are except can purify waste water middle N, P and some poisonous and harmful substances, also to the absorption that has of heavy metal.Yet phytoremediation is subjected to the large therefore very difficult large-scale promotion of the restriction of floristics and growth conditions and application.
It is a kind of new heavy metal-polluted soil restorative procedure that microorganism is repaired, and utilizes heavy metal in the microorganism rehabilitating soil.For example, the sulfur oxidizing bacterium bioleaching is exactly directly to utilize sulfur oxidizing bacterium (Thiobacillus thioxidans, grate sulfur thiobacillus, Thiobacillus ferrooxidans etc.) metabolism or its metabolic product of indirect utilization to dissolve a kind of biological renovation method of heavy metal in soil pollutant.The process of sulfur oxidizing bacterium bioleaching can be divided into direct leaching and indirectly leaching according to different matrix: when containing the reduction-state heavy metal sulfide in the soil, sulfur oxidizing bacterium can directly react with heavy metal sulfide (NiS, CuS, ZnS etc.), insoluble attitude heavy metal sulfide is converted into the sulfate of soluble state; When heavy metal exists with the unsulfided form, add the sulphur powder, sulfur oxidizing bacterium can utilize first the growth of sulphur powder and produce sulfuric acid, and and heavy metal in soil pollutant effect indirect by sulfuric acid produces the sulfate of soluble state again.Compare the chemical leaching reparation, running cost has reduced by 80% approximately.Yet the bioleaching reparation also can produce high heavy metal concentration and be rich in the leachate of N, P, also may contain in addition some poisonous and hazardous materials in the leachate, can be to environment.
Summary of the invention
Goal of the invention: the purpose of this invention is to provide high, the effective heavy-metal contaminated soil prosthetic device of a kind of efficient and utilize the method for this device restoration of soil polluted by heavy metal.
Technical scheme: a kind of heavy-metal contaminated soil prosthetic device provided by the invention comprises the peristaltic pump, bioleaching reactor, micro porous filtration post, regulating tank and the plant treatment groove that are in turn connected into ring by connecting pipe; Described bioleaching reactor head is provided with injection port, inside and is provided with that agitator, outer wall are provided with aerator, the bottom is provided with outlet, and described aerator gas outlet is located in the bioleaching reactor; Be provided with the first control valve between described bioleaching reactor and the micro porous filtration post, be provided with the second control valve between described regulating tank and the plant treatment groove, described plant treatment trench bottom is provided with the 3rd control valve.
This device is by bioleaching reactor, regulating tank and plant treatment groove, make heavy metal in soil stripping in the bioleaching reactor, the water yield and the pH that regulate leachate in regulating tank make it be suitable for processing plant growth, utilize the plant treatment leachate at the plant treatment groove, effectively removed soil middle and high concentration heavy metal and other poisonous and harmful substances; Also utilize simultaneously the peristaltic pump leachate of will degrading to pass in the bioleaching reactor recycling.
A kind of improvement as heavy-metal contaminated soil prosthetic device of the present invention also comprises the cylindricality linker, and described cylindricality linker one end is communicated with the bioleaching reactor bottom, is provided with the 4th control valve between described cylindricality linker and the bioleaching reactor; By the cylindricality linker is set, thereby can in the cylindricality linker, lay in reaction mixture, and with its inoculation bacterium liquid as the sulfur oxidizing bacterium bioleaching, processing can be looped, reduce processing cost.
Another kind as heavy-metal contaminated soil prosthetic device of the present invention improves, and described micro porous filtration post is the cylinder of hollow, and both ends of the surface are provided with the filter membrane of 0.3-0.6 μ m, middle part filling sponge filler about it.
Improve as the another kind of heavy-metal contaminated soil prosthetic device of the present invention, described plant treatment groove comprises grid and is located at sponge between grid.
The present invention also provides a kind of method of utilizing the said apparatus restoration of soil polluted by heavy metal, may further comprise the steps:
(1) pending soil, sulphur powder, sulfur oxidizing bacterium inoculation liquid and water are added in the bioleaching reactor, stir and aeration, the leaching reaction gets reaction mixture;
(2) reaction mixture is filtered and enters in the regulating tank by the micro porous filtration post, add water to the former water yield, and transfer pH to 5-7, get leachate; Utilize outlet to discharge soil;
(3) leachate is passed in the plant treatment groove, and in leachate, plant and cultivate and process plant, get the degraded leachate.
Wherein, in the step (1), the weight ratio of described soil, sulphur powder, sulfur oxidizing bacterium inoculation liquid and running water is (40-60): (40-60): (3-5): 1000; The aeration rate is 0.5 * 10
-8-1.0 * 10
-8KgdmS
-1, stirring intensity is 150-200r/min, and the leaching reaction temperature is 20-30 ℃, and the leaching reaction time is 10-15 days.
Wherein, in the step (3), described processing plant Wei Da Piao, the described cultivation time is 10-15 days, cultivates 20-30 ℃ of temperature.
Beneficial effect: heavy-metal contaminated soil prosthetic device provided by the invention is simple in structure, easy to use, use cost is low, treatment effeciency is high, treatment effect is good.
Heavy-metal contaminated soil prosthetic device of the present invention adopts the principle of bioleaching and plant absorption associating, first with heavy metal stripping from soil, then adopt Da Piao adsorption treatment leachate, effectively remove the heavy metal of leachate middle and high concentration and N, the P that is rich in, enlarged the range of application of water plant absorption repairing heavy metal pollution; Through all right repetitive cycling utilization of the leachate of excessive Piao adsorption treatment, further reduced rehabilitation cost simultaneously.
Description of drawings
Fig. 1 is heavy-metal contaminated soil prosthetic device structural representation of the present invention.
Fig. 2 is the structural representation of plant treatment groove.
Wherein, 1 is that peristaltic pump, 2 is that bioleaching reactor, 3 is that micro porous filtration post, 4 is that regulating tank, 5 is that plant treatment groove, 6 is that the first control valve, 7 is that the second control valve, 8 is that the 3rd control valve, 9 is the 4th control valve; 21 is that injection port, 22 is that agitator, 23 is that aerator, 24 is that outlet, 25 is the cylindricality linker; 51 is that grid, 52 is sponge.
The specific embodiment
According to following embodiment, the present invention may be better understood.Yet, those skilled in the art will readily understand that the described concrete material proportion of embodiment, process conditions and result thereof only are used for explanation the present invention, and should also can not limit the present invention described in detail in claims.
The heavy-metal contaminated soil prosthetic device is seen Fig. 1 to Fig. 2, comprises the peristaltic pump 1, bioleaching reactor 2, micro porous filtration post 3, regulating tank 4 and the plant treatment groove 5 that are in turn connected into ring by connecting pipe.
Among the present invention, also be provided with cylindricality linker 25, the one end is communicated with bioleaching reactor 2 bottoms; Be provided with the 4th control valve 9 between cylindricality linker 25 and the bioleaching reactor 2.
Among the present invention, micro porous filtration post 3 be the cylinder of hollow, its both ends of the surface are provided with the filter membrane of 0.45 μ m, middle part filling sponge filler; Alternatively, the filter membrane aperture of the both ends of the surface of micro porous filtration post 3 choose reasonable as required; Preferably, be 0.3-0.6 μ m.
Utilize the heavy-metal contaminated soil prosthetic device single treatment Heavy metal contaminated soil of embodiment 1, method is as follows:
(1) pending soil, sulphur powder, sulfur oxidizing bacterium inoculation liquid and water are added in the bioleaching reactor 2, stir and aeration, the leaching reaction gets reaction mixture; Reaction condition is as follows: the weight ratio of described soil, sulphur powder, sulfur oxidizing bacterium inoculation liquid and running water is (40-60): (40-60): (3-5): 1000; The aeration rate is 0.5 * 10
-8-1.0 * 10
-8KgdmS
-1, stirring intensity is 150-200r/min, and the leaching reaction temperature is 20-30 ℃, and the leaching reaction time is 10-15 days.
(2) reaction mixture is filtered and enters in the regulating tank 4 by micro porous filtration post 3, add water to the former water yield, and transfer pH to 5-7, get leachate; Utilize outlet 24 to discharge soil;
(3) leachate is passed in the plant treatment groove 5, and in leachate 20-30 ℃ of time plantation and Pei Yu Da Piao 10-15 days, get the degraded leachate.
Treatment effect sees Table 1.
Table 1 heavy-metal contaminated soil prosthetic device single treatment condition
Table 2 heavy-metal contaminated soil prosthetic device single treatment effect
Utilize the heavy-metal contaminated soil prosthetic device circular treatment Heavy metal contaminated soil of embodiment 1, method is as follows:
(a) close all control valves, injected water is to bioleaching reactor 2 to 3/4 height from injection port 21.Add pending soil, sulphur powder, sulfur oxidizing bacterium inoculation liquid; Wherein, the weight ratio of soil, sulphur powder, sulfur oxidizing bacterium inoculation liquid and running water is 50:50:4:1000, opens agitator 22 and aerator 23, aeration rate 0.5 * 10
-8KgdmS
-1, stirring intensity 150r/min, treatment temperature is 25 ℃, 14 days processing times.
(b) open the 4th control valve 9, close the 4th control valve 9 after the question response mixed liquor enters in the cylindricality linker 25; Open the first control valve 6, reaction mixture enters regulating tank 4 by micro porous filtration post 3, closes the first control valve 6; Close agitator 22 and aerator 23, open outlet 24, after soil takes out, close outlet 24; Add adding water to the former water yield in the regulating tank 4, and regulate pH to 5-7; Open the 4th control valve 9, the question response mixed liquor is closed the 4th control valve 9 after entering bioleaching reactor 2 fully,
(c) continue to add to bioleaching reactor 2 and add water to 3/4 height; And to the bioleaching reactor 2 pending soil of interpolation and sulphur powder, stir and aerated reaction, condition is with (a);
(d) open and close the 7th control valve 7 after leachate enters plant treatment groove 5 in the second control valve 7 grooves 4 to be regulated, water planting Zhong Zhi Da Piao, plantation 3-5 strain was cultivated 14 days in every grid;
(e) repeat (b); Behind the whole plant harvesting Da Piao, open the 3rd control valve 8 and peristaltic pump 1, close the 3rd control valve 8 after the degraded leachate enters bioleaching reactor 2 in plant treatment groove 5, repeat (d).
(f) repeat (e).
The result shows: for trying soil (Zn3772.7mg/kg, Cd26.4mg/Kg, Cu349.7mg/Kg, TN2734.7mg/Kg, TP697.7mg/Kg) after the bioleaching reaction treatment, Zn, Cd and Cu clearance surpass 70%, the TN turnover rate surpasses 40%, TP and does not substantially run off; Zn100.08mg/L, Cd0.89mg/L, Cu3.75mgL, TN12mgL, TP5mg/L in the leachate, after excessive Piao absorption, Zn9.71mgL, Cd0.53mg/L, Cu0.35mg/L, TN0.88mg/L, TP0.26mgL in the leachate; Show that Da Piao surpasses 90% to heavy metal in the leachate and TN, TP clearance.
Claims (8)
1. a heavy-metal contaminated soil prosthetic device is characterized in that: comprise the peristaltic pump (1), bioleaching reactor (2), micro porous filtration post (3), regulating tank (4) and the plant treatment groove (5) that are in turn connected into ring by connecting pipe; Described bioleaching reactor (2) top is provided with injection port (21), inside and is provided with that agitator (22), outer wall are provided with aerator (23), the bottom is provided with outlet (24), and described aerator (23) gas outlet is located in the bioleaching reactor (2); Be provided with the first control valve (6) between described bioleaching reactor (2) and the micro porous filtration post (3), be provided with the second control valve (7) between described regulating tank (4) and the plant treatment groove (5), described plant treatment groove (5) bottom is provided with the 3rd control valve (8).
2. a kind of heavy-metal contaminated soil prosthetic device according to claim 1, it is characterized in that: also comprise cylindricality linker (25), described cylindricality linker (25) one ends are communicated with bioleaching reactor (2) bottom, are provided with the 4th control valve (9) between described cylindricality linker (25) and the bioleaching reactor (2).
3. a kind of heavy-metal contaminated soil prosthetic device according to claim 1 is characterized in that: also comprise aerator (23), described aerator (23) is located at bioleaching reactor (2) bottom.
4. a kind of heavy-metal contaminated soil prosthetic device according to claim 1, it is characterized in that: described micro porous filtration post (3) is the cylinder of hollow, its up and down both ends of the surface be provided with the filter membrane of 0.3-0.6 μ m, middle part filling sponge filler.
5. a kind of heavy-metal contaminated soil prosthetic device according to claim 1 is characterized in that: described plant treatment groove (5) comprises grid (51) and is located at sponge (52) between grid (51).
6. heavy-metal contaminated soil restorative procedure is characterized in that: may further comprise the steps:
(1) pending soil, sulphur powder, sulfur oxidizing bacterium inoculation liquid and water are added in the bioleaching reactor, stir and aeration, the leaching reaction gets reaction mixture;
(2) reaction mixture is filtered and enters in the regulating tank by the micro porous filtration post, add water to the former water yield, and transfer pH to 5-7, get leachate; Utilize outlet to discharge soil;
(3) leachate is passed in the plant treatment groove, and in leachate, plant and cultivate and process plant, get the degraded leachate.
7. a kind of heavy-metal contaminated soil restorative procedure according to claim 6 is characterized in that: the weight ratio of described soil, sulphur powder, sulfur oxidizing bacterium inoculation liquid and running water is (40-60): (40-60): (3-5): 1000; The aeration rate is 0.5 * 10
-8-1.0 * 10
-8KgdmS
-1, stirring intensity is 150-200r/min, and the leaching reaction temperature is 20-30 ℃, and the leaching reaction time is 10-15 days.
8. a kind of heavy-metal contaminated soil restorative procedure according to claim 6 is characterized in that: described processing plant Wei Da Piao, the described cultivation time is 10-15 days, cultivates 20-30 ℃ of temperature.
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| CN201210492950.1A CN102974602B (en) | 2012-11-27 | 2012-11-27 | Heavy metal polluted soil remediation device and method |
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| CN201210492950.1A CN102974602B (en) | 2012-11-27 | 2012-11-27 | Heavy metal polluted soil remediation device and method |
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| CN105344703A (en) * | 2015-10-16 | 2016-02-24 | 北京德瑞科森环保科技有限公司 | Multi-stage type soil in-situ aeration system |
| CN105598144A (en) * | 2016-03-22 | 2016-05-25 | 安徽工程大学 | Restoration method of polluted soil |
| CN107457271A (en) * | 2017-10-09 | 2017-12-12 | 北京军秀咨询有限公司 | A kind of repairing method of microorganism of heavy-metal contaminated soil |
| CN108097408A (en) * | 2017-12-23 | 2018-06-01 | 郑州源冉生物技术有限公司 | A kind of portable recyclable soil pollution prosthetic device |
| CN110918600A (en) * | 2019-11-21 | 2020-03-27 | 昆明理工大学 | Method for rapid biochemical dealkalization and soil formation of red mud |
| WO2021121339A1 (en) * | 2019-12-17 | 2021-06-24 | 广东以色列理工学院 | Soil heavy metal remediation apparatus |
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Cited By (10)
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| CN105251760A (en) * | 2015-10-16 | 2016-01-20 | 北京德瑞科森环保科技有限公司 | Automatic aeration control method based on multi-section type aerating system |
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| CN105344703B (en) * | 2015-10-16 | 2018-01-02 | 北京德瑞科森环保科技有限公司 | A kind of multisection type soil in-situ aerating system |
| CN105598144A (en) * | 2016-03-22 | 2016-05-25 | 安徽工程大学 | Restoration method of polluted soil |
| CN105598144B (en) * | 2016-03-22 | 2019-01-18 | 安徽工程大学 | A kind of restorative procedure of contaminated soil |
| CN107457271A (en) * | 2017-10-09 | 2017-12-12 | 北京军秀咨询有限公司 | A kind of repairing method of microorganism of heavy-metal contaminated soil |
| CN108097408A (en) * | 2017-12-23 | 2018-06-01 | 郑州源冉生物技术有限公司 | A kind of portable recyclable soil pollution prosthetic device |
| CN110918600A (en) * | 2019-11-21 | 2020-03-27 | 昆明理工大学 | Method for rapid biochemical dealkalization and soil formation of red mud |
| WO2021121339A1 (en) * | 2019-12-17 | 2021-06-24 | 广东以色列理工学院 | Soil heavy metal remediation apparatus |
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|---|---|
| CN102974602B (en) | 2015-06-17 |
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