CN114669592A - Method for repairing organic contaminated soil by vulcanizing nano zero-valent iron activated persulfate - Google Patents
Method for repairing organic contaminated soil by vulcanizing nano zero-valent iron activated persulfate Download PDFInfo
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- CN114669592A CN114669592A CN202210294557.5A CN202210294557A CN114669592A CN 114669592 A CN114669592 A CN 114669592A CN 202210294557 A CN202210294557 A CN 202210294557A CN 114669592 A CN114669592 A CN 114669592A
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- 239000002689 soil Substances 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 24
- -1 zero-valent iron activated persulfate Chemical class 0.000 title claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 58
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims abstract description 41
- 239000011259 mixed solution Substances 0.000 claims abstract description 20
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 8
- 231100000719 pollutant Toxicity 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 82
- 230000036346 tooth eruption Effects 0.000 claims description 21
- 238000007599 discharging Methods 0.000 claims description 20
- 239000000243 solution Substances 0.000 claims description 18
- 238000012545 processing Methods 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 16
- 238000000926 separation method Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 7
- 239000006185 dispersion Substances 0.000 claims description 6
- 230000008439 repair process Effects 0.000 claims description 6
- 230000002262 irrigation Effects 0.000 claims description 3
- 238000003973 irrigation Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 239000000356 contaminant Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000005202 decontamination Methods 0.000 abstract description 2
- 230000003588 decontaminative effect Effects 0.000 abstract description 2
- 238000003900 soil pollution Methods 0.000 abstract description 2
- 238000007873 sieving Methods 0.000 description 13
- 239000002957 persistent organic pollutant Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005067 remediation Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- BTJIUGUIPKRLHP-UHFFFAOYSA-N 4-nitrophenol Chemical compound OC1=CC=C([N+]([O-])=O)C=C1 BTJIUGUIPKRLHP-UHFFFAOYSA-N 0.000 description 1
- 206010024796 Logorrhoea Diseases 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000001994 activation Methods 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000003621 irrigation water Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 150000003071 polychlorinated biphenyls Chemical group 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000010092 rubber production Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005486 sulfidation Methods 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- HFFLGKNGCAIQMO-UHFFFAOYSA-N trichloroacetaldehyde Chemical compound ClC(Cl)(Cl)C=O HFFLGKNGCAIQMO-UHFFFAOYSA-N 0.000 description 1
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B49/00—Combined machines
- A01B49/04—Combinations of soil-working tools with non-soil-working tools, e.g. planting tools
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B77/00—Machines for lifting and treating soil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Environmental Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the technical field of soil pollution treatment, and discloses a method for restoring organic polluted soil by using vulcanized nano zero-valent iron activated persulfate. The method can effectively mix the vulcanized nano zero-valent iron and persulfate mixed solution into the soil, has the advantages of simple and labor-saving implementation process, full reaction, high reaction efficiency, strong decontamination capability, no need of further advanced treatment, reduction of the treatment cost of pollutants, market competitiveness and good application prospect.
Description
Technical Field
The invention relates to the technical field of soil pollution treatment, in particular to a method for restoring organic polluted soil by activating persulfate through vulcanized nano zero-valent iron.
Background
The soil organic pollution is caused by organic matters, main organic pollutants in the soil comprise pesticides, chloral, polycyclic aromatic hydrocarbon, polychlorinated biphenyl, petroleum, methane and the like, and artificially synthesized organic pollutants such as synthetic rubber, plastics and the like are generated along with the rise of modern chemical industry. The method has important significance for repairing the polluted soil, can effectively prevent pollutants from entering a food chain, prevents harm to human health, and can effectively protect land resources. The soil remediation technology starts late in China, and the related technology and equipment foundation are lagged behind compared with the international level. Therefore, the development of advanced organic pollution soil treatment technology is urgently needed to be strengthened, the treatment capacity of related equipment is improved, the organic pollution problem of soil is effectively prevented and treated, and the green sustainable economic development is promoted.
The vulcanized nano zero-valent iron is vulcanized and modified on the basis of zero-valent iron, and mainly forms Fe with the main surface of the zero-valent iron (nZVI)xSyNovel nanomaterials of the layer. The surface of the zero-valent iron after the vulcanization treatment is provided with a layer of iron sulfide shell, and compared with the iron oxide shell, the iron sulfide shell has stronger conductivity, can accelerate the electron transmission efficiency and improve the aggressivity of electrons to target pollution. In addition, sulfidation can inhibit agglomeration and oxidation of zero-valent iron and side reactions of non-target contaminants, thereby further improving the activity thereof. The persulfate molecules contain oxy (-o-o-), and are strong oxidants, and the nano zero-valent iron can efficiently activate persulfate to generate SO4 ·-And OH to enhance the degradation of organic substances. During the activation process, the nano zero-valent iron can also convert Fe3+Reduction to Fe2+The continuous production of active species is promoted by the Fe cycle. Therefore, the sulfuration of the nano zero-valent iron not only improves the SO production of persulfate4 ·-And OH, effectively prevents the oxidation of internal zero-valent iron, maintains the high reaction activity of the zero-valent iron, and further improves the degradation efficiency. How to efficiently compound the nanometer zero-valent iron and the persulfate for the treatment of the organic pollution of the soil and improve the efficiency of related equipment and treatment technology is the problem to be solved by the invention.
Disclosure of Invention
Based on the problems, the invention provides the method for restoring the organic polluted soil by vulcanizing the nano zero-valent iron activated persulfate, and the method can uniformly mix the vulcanized nano zero-valent iron and the persulfate with the soil, and has high restoration efficiency and good restoration effect.
In order to solve the technical problems, the invention provides the following technical scheme:
the method for restoring the organic polluted soil by vulcanizing the nano zero-valent iron activated persulfate comprises the following steps:
s1: adding vulcanized nano zero-valent iron and persulfate solution into a repair processor according to a certain proportion, wherein the repair processor comprises a processing box, a storage battery and a control center are arranged in the processing box, a mixing chamber for containing the vulcanized nano zero-valent iron and the persulfate solution is also arranged in the processing box, a feeding channel penetrating through the top of the processing box is arranged at the top of the mixing chamber, a cover is arranged at the top of the feeding channel, the bottom end of the mixing chamber is funnel-shaped, a plurality of discharging pipes which are arranged at equal intervals along the length direction of the processing box and penetrate through the bottom of the processing box are arranged at the bottom of the mixing chamber, and electromagnetic valves are arranged on the discharging pipes;
the side wall of one side of the treatment box is provided with a horizontally arranged traction rod, one end of the traction rod, which is far away from the treatment box, is provided with a connecting hole, the traction rod is vertical to a vertical surface where the plurality of discharging pipes are positioned, the bottom of the treatment box is also provided with a plurality of plough legs which are arranged at equal intervals along the length direction of the treatment box, the plough legs are arranged between the discharging pipes and the traction rod, and the bottom end of one surface of each plough leg, which faces the traction rod, is provided with a plough head; the bottom of the treatment box is also provided with two movable plates which are arranged along the length direction of the treatment box, a stirring rod which is rotatable and has two ends inserted into the two movable plates is arranged between the two movable plates, the outer side wall of the stirring rod is provided with a plurality of groups of stirring assemblies which are equidistantly arranged along the length direction of the stirring rod, each stirring assembly comprises four groups of stirring plates which are uniformly arranged along the circumferential direction of the stirring rod, each stirring plate comprises isosceles triangular prism-shaped cutting teeth and a soil sieving plate with a V-shaped cross section, each soil sieving plate is provided with a plurality of sieve pores, the cutting heads of the cutting teeth are same with the V-shaped heads of the soil sieving plates in orientation, the cutting teeth and the soil sieving plates are multiple and are arranged at intervals along the length direction of the stirring rod, and electromagnets are arranged in the cutting teeth and the stirring rod;
the vulcanized nano zero-valent iron and the persulfate solution enter a mixing chamber from a feeding channel, after the mixture is stirred and mixed uniformly, a traction rod is dragged by a tractor to drive a repairing processor to work on the repaired soil, and the day when the repairing processor works and the 3-5 days later need to be sunny days;
s2: the repairing machine plows through the plowshare, the discharging pipe located behind the plowshare continuously sprays the vulcanized nano zero-valent iron and persulfate mixed solution into the plowed soil, the stirring assembly located behind the discharging pipe rotates ceaselessly, the soil mixed with the vulcanized nano zero-valent iron and persulfate mixed solution is smashed and uniformly mixed, and the rotating speed of the stirring rod is as follows: the stirring rod rotates 8-10 circles within 50cm of forward running time of the repairing processor;
s3: after the mixed solution of the vulcanized nano zero-valent iron and the persulfate is completely scattered on the land to be repaired, the land is aired for two days, the field temperature needs to be kept at 25-28 ℃ in the period, and when the temperature cannot be reached, the film is covered and the heat is preserved; after two days, irrigating water in the field, wherein the irrigation amount is preferably 10-12cm above the soil surface;
s4: after the step S3 is finished, the repairing machine is dragged into the field again, the stirring rod rotates, the stirring assembly stirs soil and water, the soil and the water are mixed, meanwhile, the electromagnets in the cutting teeth and the stirring rod are electrified, and the surfaces of the cutting teeth and the stirring rod can adsorb zero-valent iron carrying pollutants; and after the repairing processor stirs the whole repaired land once, standing the repaired land for half a day, then dragging the repairing processor into the field again, repeating the operation of the step, standing the repaired land again for the next day, and pumping water out of the field.
Further, in the step S1, the grain size of the nanometer zero-valent iron sulfide is 40-60nm, the concentration of the persulfate solution is 0.45-0.68mol/L, and the mass ratio of the nanometer zero-valent iron sulfide to the persulfate solution is 2: 7-2: 5.
further, the lateral wall of handling the case is equipped with rotating electrical machines one, rotating electrical machines is equipped with the level setting and stretches into the churning column in the hybrid chamber to the one side of handling the case, the lateral wall of churning column is equipped with the puddler.
Furthermore, the bottom of discharging pipe is equipped with the rectangular liquid separation bottle with the discharging pipe intercommunication, the length direction of liquid separation bottle is the same with the length direction who handles the case, the bottom of liquid separation bottle be equipped with a plurality of along the length direction equidistance of handling the case arrange and with the liquid separation bottle in the dispersion pipe of intercommunication.
Furthermore, one end of the stirring rod inserted into the machine movable plate is provided with a first gear which is vertically arranged and is positioned in the machine movable plate, the top of the first gear is provided with a second gear which is vertically arranged and is meshed with the first gear, one surface of the second gear, deviating from the stirring rod, is provided with a rotating rod which penetrates through the processing box, and one end of the rotating rod, deviating from the second gear, is provided with a second rotating motor which is connected with the side wall of the processing box.
Further, in the step S2, the mass ratio of the application amount of the mixed solution of the nanometer zero-valent iron sulfide and the persulfate to the organic pollutants in the soil is 1: (50-70).
Compared with the prior art, the invention has the beneficial effects that: the method can effectively mix the vulcanized nano zero-valent iron and persulfate mixed solution into the soil, has the advantages of simple and labor-saving implementation process, full reaction, high reaction efficiency, strong decontamination capability, no need of further advanced treatment, reduction of the treatment cost of pollutants, market competitiveness and good application prospect.
Drawings
FIG. 1 is an internal structure of a front view of a repair handler of the present invention;
FIG. 2 is a partial schematic view of a left side view of the agitating plate portion of the present invention;
FIG. 3 is a top view of the stir plate of the present invention;
FIG. 4 is an internal structure of a left side view of the agitation bar portion of the present invention;
FIG. 5 is a schematic illustration of the structure of the tapping pipe according to the invention;
wherein: 1. a treatment tank; 2. a storage battery; 3. a control center; 4. a mixing chamber; 5. a charging channel; 6. a cover; 7. a discharge pipe; 8. an electromagnetic valve; 9. a draw bar; 10. connecting holes; 11. plough legs; 12. a plowshare; 13. a motor plate; 14. a stirring rod; 15. cutting teeth; 16. a soil screening plate; 17. screening holes; 18. a first rotating motor; 19. stirring the column; 20. a stirring rod; 21. a liquid separating bottle; 22. a dispersion pipe; 23. a first gear; 24. a second gear; 25. a rotating rod; 26. and a second rotating motor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1:
referring to fig. 1, fig. 2, fig. 3 and fig. 4, this embodiment is for better restoration organic pollutant, improves repair efficiency, has used the restoration processor, and the restoration processor is including handling case 1, and it is the cuboid type to handle case 1, is equipped with battery 2 and control center 3 in handling case 1, and battery 2 and the 3 electric connection of control center, and 3 accessible wireless connection's of control center mode are connected with computer or cell-phone end, and through computer or cell-phone end control restoration processor operation.
Still be equipped with the splendid attire in the processing case 1 and vulcanize nanometer zero-valent iron and persulfate solution's mixing chamber 4, the top of mixing chamber 4 is equipped with the charging channel 5 that passes the top of processing case 1, adds through charging channel 5 and vulcanizes nanometer zero-valent iron and persulfate in to mixing chamber 4, and the top of charging channel 5 is equipped with lid 6, and lid 6 can connect soon with 5 screw threads of charging channel, also can directly cover. The bottom of mixing chamber 4 is the infundibulate, does benefit to the outflow of vulcanization nanometer zero-valent iron and persulfate mixed solution, and the bottom of mixing chamber 4 is equipped with a plurality of length direction equidistance settings and the bottom of handling case 1 and passes the discharging pipe 7 of the bottom of handling case 1, and discharging pipe 7 is equipped with solenoid valve 8, and discharging pipe 7 and the welding of handling case 1, and solenoid valve 8 is used for controlling discharging pipe 7 and regards as opening and closing of passageway, and the direction of travel of handling case 1 is perpendicular rather than length direction. The bottom of the discharge pipe 7 is also provided with a rectangular liquid separation bottle 21 communicated with the discharge pipe 7, the liquid separation bottle 21 is welded with the discharge pipe 7, the length direction of the liquid separation bottle 21 is the same as the length direction of the treatment box 1, the bottom of the liquid separation bottle 21 is provided with a plurality of dispersion pipes 22 which are arranged at equal intervals along the length direction of the treatment box 1 and are communicated with the interior of the liquid separation bottle 21, and the dispersion pipes 22 are welded with the liquid separation bottle 21. The mixed solution flows into the liquid separation bottle 21 from the discharge pipe 7 and then flows out from the dispersion pipe 22, so that the actual ground width of the spread mixed solution is increased, the mixed solution is spread on the ground more uniformly, and the amount of the mixed solution finally spread on the ground can be controlled more effectively.
In order to guarantee that the nanometer zero-valent iron of vulcanizing in the mixing chamber 4 and persulfate are homogeneous mixing always, the lateral wall of this embodiment reprocessing case 1 is equipped with rotating electrical machines 18, rotating electrical machines 18 and the lateral wall welding of handling case 1, rotating electrical machines 18 is equipped with the setting of level and stretches into the churning column 19 in the mixing chamber 4 towards the one side of handling case 1, the lateral wall of churning column 19 is equipped with puddler 20, nanometer zero-valent iron and persulfate can be vulcanized to puddler 20 misce bene.
The side wall of one side of the treatment box 1 is provided with a horizontally arranged traction rod 9, the traction rod 9 is welded with the treatment box 1, one end of the traction rod 9, which is far away from the treatment box 1, is provided with a connecting hole 10, and the traction rod 9 can be connected with a tractor through the connecting hole 10 and comprises an iron chain connection or a rope or iron ring connection. The draw bar 9 is perpendicular to the vertical plane where the discharge pipes 7 are located, the draw bar 9 is arranged on the side wall of the treatment box 1 in the driving direction, the bottom of the treatment box 1 is further provided with a plurality of plough legs 11 which are equidistantly arranged along the length direction of the treatment box 1, the plough legs 11 are arranged between the discharge pipes 7 and the draw bar 9, the plough legs 11 are welded with the treatment box 1, the bottom end of one surface, facing the draw bar 9, of the plough leg 11 is provided with a plough head 12, and the plough head 12 of the embodiment is the same as the plough head 12 in the prior art.
The bottom of the treatment box 1 is also provided with two motorized plates 13, the two motorized plates 13 are respectively arranged at two ends of the bottom of the treatment box 1, the two motorized plates 13 are arranged along the length direction of the treatment box 1, and the motorized plates 13 are welded with the treatment box 1. A stirring rod 14 which is rotatable and has two ends inserted into the two movable plates 13 respectively is arranged between the two movable plates 13, one end of the stirring rod 14 inserted into the movable plates 13 is provided with a first gear 23 which is vertically arranged and is positioned in the movable plates 13, the stirring rod 14 is welded with the center of the corresponding first gear 23, the top of the first gear 23 is provided with a second gear 24 which is vertically arranged and is meshed with the first gear 23, one surface of the second gear 24 departing from the stirring rod 14 is provided with a rotating rod 25 penetrating through the side wall of the treatment box 1, the rotating rod 25 is welded with the center of the second gear 24, one end of the rotating rod 25 departing from the second gear 24 is provided with a second rotating motor 26 connected with the side wall of the treatment box 1, the second rotating motor 26 is welded with the side wall of the treatment box 1, and the rotating rod 25 is connected with the output shaft end of the second rotating motor 26. The second gear 24 is driven by the second rotating motor 26 to rotate, and the second gear 24 drives the first gear 23 to rotate, so as to drive the stirring rod 14 to rotate.
The outer side wall of the stirring rod 14 is provided with a plurality of groups of stirring assemblies which are equidistantly arranged along the length direction of the stirring rod 14, each stirring assembly comprises four groups of stirring plates which are uniformly arranged along the circumferential direction of the stirring rod 14, each stirring plate comprises isosceles triangular prism-shaped cutting teeth 15 and a soil sieving plate 16 with a V-shaped cross section, each soil sieving plate 16 is provided with a plurality of sieve holes 17, the tips of the cutting teeth 15 are called as cutting heads in the embodiment, the tips of the soil sieving plates 16 are called as V-shaped heads, the cutting heads of the cutting teeth 15 and the V-shaped heads of the soil sieving plates 16 have the same orientation, specifically referring to the attached figures 2 and 3, the cutting teeth 15 and the soil sieving plates 16 are arranged at intervals along the length direction of the stirring rod 14, the cutting teeth 15 and the soil sieving plates 16 are integrally manufactured, and the cutting teeth 15 and the soil sieving plates 16 are both welded with the stirring rod 14, when the cutting teeth 15 and the soil sieving plate 16 are positioned on the top of the stirring rod 14, the cutting heads of the cutting teeth 15 and the V-shaped heads of the soil sieving plate 16 face to the driving direction of the processing box 1. The second 26 drive stirring rod of rotating electrical machines 14 rotates, and then the stirring board that drives every group and stir the subassembly rotates, when stirring the board and rotating, incised tooth 15 and sieve soil board 16 all can further chop the soil that the plough turned over, and smash soil, when certain row stirs the board and rotates big half a circle, have partial soil to stay between adjacent incised tooth 15 and the sieve soil board 16, finely divided soil still can be stirring board pivoted in-process and fall out from sieve mesh 17, and then reach the purpose of further stirring garrulous and mixing soil, the mixing efficiency is high.
In this embodiment, electromagnets are disposed in both the cutting teeth 15 and the stirring rod 14, and the electromagnets can adsorb part of the zero-valent iron (including the zero-valent iron which does not participate in the reaction or adsorbs other pollutants).
The method for remediating the organic contaminated soil by using the remediation processor comprises the following steps: firstly, adding the vulcanized nano zero-valent iron and persulfate solution into a repairing processor according to a certain proportion, starting a first rotating motor 18 while adding, and stirring constantly or stirring once at intervals of a certain time, wherein the particle size of the vulcanized nano zero-valent iron is 40-60nm, the concentration of the persulfate solution is 0.45-0.68mol/L, and the mass ratio of the vulcanized nano zero-valent iron to the persulfate solution is 2: 7-2: 5; then a cover 6 is covered, the towing vehicle or other field operation vehicles drive the towing rod 9 to drive the repairing processor to work on the repaired land, and the day when the repairing processor works and the days 3-5 after the repairing processor need to be both sunny days, so the weather condition needs to be known in advance before repairing; the repairing machine plows through the plowshare 12 along with the dragging vehicle in the advancing process, the mixed solution of the vulcanized nano zero-valent iron and the persulfate is continuously sprinkled in plowed soil through the discharging pipe 7 positioned behind the plowshare 12, the stirring component positioned behind the discharging pipe 7 continuously rotates to break and uniformly mix the soil mixed with the mixed solution of the vulcanized nano zero-valent iron and the persulfate, and the rotating speed of the stirring rod 14 is as follows: the stirring rod 14 rotates 8-10 circles within 50cm of forward running time of the repairing processor; the mass ratio of the spreading amount of the vulcanized nano zero-valent iron and persulfate mixed solution to the organic pollutants in the soil is 1: (50-70).
After the mixed solution of the vulcanized nano zero-valent iron and the persulfate is completely scattered on the land to be repaired, the land needs to be aired for two days, the field temperature needs to be kept at 25-28 ℃ in the period, when the temperature cannot reach, the film needs to be covered for heat preservation, and if no film covering condition exists, the land airing time can be increased by 1-2 days when the outdoor temperature is above 18 ℃; after the field is dried, irrigating water into the field, wherein the irrigation amount is preferably 10-12cm above the soil surface; after the operation is finished, the repairing machine is dragged into the field again, the stirring rod 14 rotates, the stirring assembly stirs soil and water, the soil and the water are mixed, meanwhile, the electromagnets in the cutting teeth 15 and the stirring rod 14 are electrified, and zero-valent iron with pollutants adsorbed on the surfaces of the cutting teeth 15 and the stirring rod 14 is adsorbed; and (3) after the whole restored land is stirred once by the restoration processor, standing the restored land for half a day, then dragging the restoration processor into the field again, repeating the operation of the step, standing the restored land again for the next day, and pumping out the water in the field.
Example 2:
in this example, a relevant experiment was carried out in a laboratory by using the treatment method in example 1, the selected soil was derived from soil contaminated by pollutants discharged from a rubber production plant, the particle size of the selected nano zero-valent iron was 45nm, the concentration of the persulfate solution was 0.57mol/L, and the mass ratio of the nano zero-valent iron sulfide to the persulfate solution was 2: 7, the mass ratio of the spreading amount of the vulcanized nano zero-valent iron and persulfate mixed solution to the organic pollutants in the soil is 1: 55, the temperature during airing the field is 25-28 ℃, the irrigation water submerges the soil surface for 10cm, and after the treatment according to the method, the removal rates of the paranitrophenol and the trichloroethylene in the soil before and after the treatment are respectively detected to be 90.23 percent and 87.12 percent.
The above is an embodiment of the present invention. The embodiments and specific parameters in the embodiments are only for the purpose of clearly illustrating the verification process of the invention and are not intended to limit the scope of the invention, which is defined by the claims, and all equivalent structural changes made by using the contents of the specification and the drawings of the present invention should be covered by the scope of the present invention.
Claims (6)
1. The method for restoring the organic contaminated soil by vulcanizing the nano zero-valent iron activated persulfate is characterized by comprising the following steps of:
s1: adding vulcanized nano zero-valent iron and persulfate solution into a repair processor according to a certain proportion, wherein the repair processor comprises a processing box (1), a storage battery (2) and a control center (3) are arranged in the processing box (1), a mixing chamber (4) for containing the vulcanized nano zero-valent iron and the persulfate solution is also arranged in the processing box (1), a feeding channel (5) penetrating through the top of the processing box (1) is arranged at the top of the mixing chamber (4), a cover (6) is arranged at the top of the feeding channel (5), the bottom end of the mixing chamber (4) is funnel-shaped, a plurality of discharging pipes (7) are arranged at equal intervals along the length direction of the processing box (1) and penetrate through the bottom of the processing box (1), and electromagnetic valves (8) are arranged on the discharging pipes (7);
the side wall of one side of the treatment box (1) is provided with a horizontally arranged traction rod (9), one end, deviating from the treatment box (1), of the traction rod (9) is provided with a connecting hole (10), the traction rod (9) is perpendicular to a vertical plane where the plurality of discharge pipes (7) are located, the bottom of the treatment box (1) is further provided with a plurality of plough legs (11) which are arranged at equal intervals along the length direction of the treatment box (1), the plough legs (11) are arranged between the discharge pipes (7) and the traction rod (9), and the bottom end, facing the traction rod (9), of one surface of each plough leg (11) is provided with a plough head (12); the bottom of handling case (1) still is equipped with two motor plate (13), two motor plate (13) are arranged along the length direction who handles case (1), two be equipped with both ends and insert respectively in two motor plate (13) and rotatable stirring rod (14) between motor plate (13), the lateral wall of stirring rod (14) is equipped with the stirring subassembly that the length direction equidistance of multiunit edge stirring rod (14) was arranged, the stirring subassembly includes four sets of stirring boards of evenly arranging along the circumferencial direction of stirring rod (14), stirring board includes cutting tooth (15) and the sieve soil board (16) that the cross-section is the V font of isosceles triangle prism type, sieve soil board (16) are equipped with a plurality of sieve meshes (17), the orientation of the V font of the crop of cutting tooth (15) and sieve soil board (16) is the same, cutting tooth (15) and sieve soil board (16) are a plurality ofly and set up along the length direction interval of stirring rod (14), electromagnets are arranged in the cutting teeth (15) and the stirring rod (14);
vulcanized nano zero-valent iron and persulfate solution enter a mixing chamber (4) from a feeding channel (5), after the nano zero-valent iron and the persulfate solution are uniformly stirred, a tractor pulls a traction rod (9) to drive a repairing processor to work on the repaired soil, and the day when the repairing processor works and the 3-5 days later need to be both fine days;
s2: the repairing processor plows through the plowshare (12), the mixed solution of the vulcanized nano zero-valent iron and the persulfate is continuously sprinkled into the plowed soil through the discharging pipe (7) positioned behind the plowshare (12), the stirring component positioned behind the discharging pipe (7) continuously rotates to break and uniformly mix the soil mixed with the mixed solution of the vulcanized nano zero-valent iron and the persulfate, and the rotating speed of the stirring rod (14) is as follows: the stirring rod (14) rotates 8-10 circles within 50cm of forward running time of the repairing processor;
s3: after the mixed solution of the vulcanized nano zero-valent iron and the persulfate is completely scattered on the land to be repaired, the land is aired for two days, the field temperature needs to be kept at 25-28 ℃ in the period, and when the temperature cannot be reached, the film is covered and the heat is preserved; after two days, irrigating water in the field, wherein the irrigation amount is preferably 10-12cm above the soil surface;
s4: after the step S3 is completed, the repairing machine is dragged into the field again, the stirring rod (14) is rotated, the stirring assembly stirs soil and water, the soil and the water are mixed, meanwhile, electromagnets in the cutting teeth (15) and the stirring rod (14) are electrified, and zero-valent iron carrying pollutants is adsorbed on the surfaces of the cutting teeth (15) and the stirring rod (14); and after the repairing processor stirs the whole repaired land once, standing the repaired land for half a day, then dragging the repairing processor into the field again, repeating the operation of the step, standing the repaired land again for the next day, and pumping water out of the field.
2. The method for remediating organically-polluted soil using sulfurized nano zero-valent iron activated persulfate as claimed in claim 1, wherein the particle size of the sulfurized nano zero-valent iron in step S1 is 40-60nm, the concentration of the persulfate solution is 0.45-0.68mol/L, and the mass ratio of the sulfurized nano zero-valent iron to the persulfate solution is 2: 7-2: 5.
3. the method for remediating organically-polluted soil by using vulcanized nano zero-valent iron activated persulfate as recited in claim 1, wherein the outer side wall of the treatment tank (1) is provided with a first rotating motor (18), one surface of the first rotating motor (18) facing the treatment tank (1) is provided with a stirring column (19) which is horizontally arranged and extends into the mixing chamber (4), and the outer side wall of the stirring column (19) is provided with a stirring rod (20).
4. The method for remediating organically-polluted soil by using sulfurized nano zero-valent iron-activated persulfate as set forth in claim 1, wherein a rectangular liquid separation bottle (21) communicating with the discharging pipe (7) is provided at the bottom of the discharging pipe (7), the length direction of the liquid separation bottle (21) is the same as the length direction of the treatment tank (1), and a plurality of dispersion pipes (22) are provided at the bottom of the liquid separation bottle (21) and are equidistantly arranged along the length direction of the treatment tank (1) and communicate with the interior of the liquid separation bottle (21).
5. The method for remediating organically-polluted soil by using vulcanized nano zero-valent iron activated persulfate as claimed in claim 1, wherein the end of the stirring rod (14) inserted into the maneuvering plate (13) is provided with a first gear (23) which is vertically arranged and is positioned in the maneuvering plate (13), the top of the first gear (23) is provided with a second gear (24) which is vertically arranged and is engaged with the first gear (23), the side of the second gear (24) departing from the stirring rod (14) is provided with a rotating rod (25) which penetrates through the treatment tank (1), and the end of the rotating rod (25) departing from the second gear (24) is provided with a second rotating motor (26) which is connected with the side wall of the treatment tank (1).
6. The method for remediating organic contaminated soil by using sulfurized nano zero-valent iron-activated persulfate as claimed in claim 1, wherein the mass ratio of the application amount of the mixed solution of the sulfurized nano zero-valent iron and the persulfate in the step S2 to the organic contaminant in the soil is 1: (50-70).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115254938A (en) * | 2022-08-08 | 2022-11-01 | 大连理工大学 | Method for degrading organic pollutants by efficiently activating persulfate through regulating iron-based material by using reduced sulfur |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104056853A (en) * | 2014-06-24 | 2014-09-24 | 柏连阳 | Method for separating cadmium, lead, chromium, arsenic and mercury in paddy field soil |
| CN106825028A (en) * | 2017-02-10 | 2017-06-13 | 环保桥（湖南）生态环境修复有限公司 | A kind of in-situ remediation method of removable agricultural land soil arsenic |
| CN108837937A (en) * | 2018-08-17 | 2018-11-20 | 枣庄市瑞隆机械制造有限公司 | A kind of crusher sieve plate that can shear material |
| CN108856275A (en) * | 2018-07-03 | 2018-11-23 | 南京万德斯环保科技股份有限公司 | A kind of method of repairing polluted soil and Organic Chemicals In Groundwater |
| CN209810912U (en) * | 2019-01-23 | 2019-12-20 | 侯萍 | Medicine device is spouted in soil environment restoration |
| CN111687192A (en) * | 2019-03-15 | 2020-09-22 | 中国石油化工股份有限公司 | Heavy metal and organic matter combined contaminated soil remediation method |
| CN212069923U (en) * | 2020-05-14 | 2020-12-04 | 中科华鲁土壤修复工程有限公司 | Movable contaminated soil remediation device |
| CN113290032A (en) * | 2021-05-30 | 2021-08-24 | 李伟 | Soil pollution administers device |
| CN113600607A (en) * | 2021-07-06 | 2021-11-05 | 李伟 | Walking type soil pollution treatment device |
-
2022
- 2022-03-24 CN CN202210294557.5A patent/CN114669592A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104056853A (en) * | 2014-06-24 | 2014-09-24 | 柏连阳 | Method for separating cadmium, lead, chromium, arsenic and mercury in paddy field soil |
| CN106825028A (en) * | 2017-02-10 | 2017-06-13 | 环保桥（湖南）生态环境修复有限公司 | A kind of in-situ remediation method of removable agricultural land soil arsenic |
| CN108856275A (en) * | 2018-07-03 | 2018-11-23 | 南京万德斯环保科技股份有限公司 | A kind of method of repairing polluted soil and Organic Chemicals In Groundwater |
| CN108837937A (en) * | 2018-08-17 | 2018-11-20 | 枣庄市瑞隆机械制造有限公司 | A kind of crusher sieve plate that can shear material |
| CN209810912U (en) * | 2019-01-23 | 2019-12-20 | 侯萍 | Medicine device is spouted in soil environment restoration |
| CN111687192A (en) * | 2019-03-15 | 2020-09-22 | 中国石油化工股份有限公司 | Heavy metal and organic matter combined contaminated soil remediation method |
| CN212069923U (en) * | 2020-05-14 | 2020-12-04 | 中科华鲁土壤修复工程有限公司 | Movable contaminated soil remediation device |
| CN113290032A (en) * | 2021-05-30 | 2021-08-24 | 李伟 | Soil pollution administers device |
| CN113600607A (en) * | 2021-07-06 | 2021-11-05 | 李伟 | Walking type soil pollution treatment device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115254938A (en) * | 2022-08-08 | 2022-11-01 | 大连理工大学 | Method for degrading organic pollutants by efficiently activating persulfate through regulating iron-based material by using reduced sulfur |
| CN115254938B (en) * | 2022-08-08 | 2023-11-21 | 大连理工大学 | Method for efficiently activating persulfate to degrade organic pollutants by reducing sulfur to regulate iron-based material |
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