CN107188382A - A kind of method in situ for removing polycyclic aromatic hydrocarbons in sediments - Google Patents
A kind of method in situ for removing polycyclic aromatic hydrocarbons in sediments Download PDFInfo
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- CN107188382A CN107188382A CN201710447620.3A CN201710447620A CN107188382A CN 107188382 A CN107188382 A CN 107188382A CN 201710447620 A CN201710447620 A CN 201710447620A CN 107188382 A CN107188382 A CN 107188382A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 10
- 239000013049 sediment Substances 0.000 title claims abstract description 10
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 title claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000001179 sorption measurement Methods 0.000 claims abstract description 26
- 241000196324 Embryophyta Species 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 claims abstract description 12
- 244000005700 microbiome Species 0.000 claims abstract description 8
- 241000209082 Lolium Species 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 22
- 239000003463 adsorbent Substances 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 10
- 241000361919 Metaphire sieboldi Species 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 claims description 8
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 7
- SWLVFNYSXGMGBS-UHFFFAOYSA-N ammonium bromide Chemical compound [NH4+].[Br-] SWLVFNYSXGMGBS-UHFFFAOYSA-N 0.000 claims description 7
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000004094 surface-active agent Substances 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims 1
- 229910052794 bromium Inorganic materials 0.000 claims 1
- 230000008021 deposition Effects 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 230000008030 elimination Effects 0.000 abstract description 2
- 238000003379 elimination reaction Methods 0.000 abstract description 2
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 8
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 4
- GVEPBJHOBDJJJI-UHFFFAOYSA-N fluoranthene Chemical compound C1=CC(C2=CC=CC=C22)=C3C2=CC=CC3=C1 GVEPBJHOBDJJJI-UHFFFAOYSA-N 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- -1 includes physics Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004083 survival effect Effects 0.000 description 3
- 238000002604 ultrasonography Methods 0.000 description 3
- DXBHBZVCASKNBY-UHFFFAOYSA-N 1,2-Benz(a)anthracene Chemical compound C1=CC=C2C3=CC4=CC=CC=C4C=C3C=CC2=C1 DXBHBZVCASKNBY-UHFFFAOYSA-N 0.000 description 2
- FMMWHPNWAFZXNH-UHFFFAOYSA-N Benz[a]pyrene Chemical compound C1=C2C3=CC=CC=C3C=C(C=C3)C2=C2C3=CC=CC2=C1 FMMWHPNWAFZXNH-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 239000003945 anionic surfactant Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 125000005605 benzo group Chemical group 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000003093 cationic surfactant Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical compound C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 2
- BBEAQIROQSPTKN-UHFFFAOYSA-N pyrene Chemical compound C1=CC=C2C=CC3=CC=CC4=CC=C1C2=C43 BBEAQIROQSPTKN-UHFFFAOYSA-N 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- KHNYNFUTFKJLDD-UHFFFAOYSA-N BCR-49 Natural products C1=CC(C=2C3=CC=CC=C3C=CC=22)=C3C2=CC=CC3=C1 KHNYNFUTFKJLDD-UHFFFAOYSA-N 0.000 description 1
- TXVHTIQJNYSSKO-UHFFFAOYSA-N BeP Natural products C1=CC=C2C3=CC=CC=C3C3=CC=CC4=CC=C1C2=C34 TXVHTIQJNYSSKO-UHFFFAOYSA-N 0.000 description 1
- HAXBIWFMXWRORI-UHFFFAOYSA-N Benzo[k]fluoranthene Chemical compound C1=CC(C2=CC3=CC=CC=C3C=C22)=C3C2=CC=CC3=C1 HAXBIWFMXWRORI-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- SXQBHARYMNFBPS-UHFFFAOYSA-N Indeno[1,2,3-cd]pyrene Chemical compound C=1C(C2=CC=CC=C22)=C3C2=CC=C(C=C2)C3=C3C2=CC=CC3=1 SXQBHARYMNFBPS-UHFFFAOYSA-N 0.000 description 1
- 206010021703 Indifference Diseases 0.000 description 1
- 208000037534 Progressive hemifacial atrophy Diseases 0.000 description 1
- 125000004054 acenaphthylenyl group Chemical group C1(=CC2=CC=CC3=CC=CC1=C23)* 0.000 description 1
- HXGDTGSAIMULJN-UHFFFAOYSA-N acetnaphthylene Natural products C1=CC(C=C2)=C3C2=CC=CC3=C1 HXGDTGSAIMULJN-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- FTOVXSOBNPWTSH-UHFFFAOYSA-N benzo[b]fluoranthene Chemical compound C12=CC=CC=C1C1=CC3=CC=CC=C3C3=C1C2=CC=C3 FTOVXSOBNPWTSH-UHFFFAOYSA-N 0.000 description 1
- 231100000693 bioaccumulation Toxicity 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- RKZJFAONHOYOKU-UHFFFAOYSA-N indeno[1,2,3-cd]pyrene Natural products C1Cc2ccc3ccc4c5ccccc5c6cc(=C1)c2c3c46 RKZJFAONHOYOKU-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007886 mutagenicity Effects 0.000 description 1
- 231100000299 mutagenicity Toxicity 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- HGASFNYMVGEKTF-UHFFFAOYSA-N octan-1-ol;hydrate Chemical compound O.CCCCCCCCO HGASFNYMVGEKTF-UHFFFAOYSA-N 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000012017 passive hemagglutination assay Methods 0.000 description 1
- 150000002979 perylenes Chemical class 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 230000035479 physiological effects, processes and functions Effects 0.000 description 1
- 229920000903 polyhydroxyalkanoate Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/32—Hydrocarbons, e.g. oil
- C02F2101/327—Polyaromatic Hydrocarbons [PAH's]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/04—Surfactants, used as part of a formulation or alone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
Abstract
The invention discloses a kind of method in situ for removing River polycyclic aromatic hydrocarbons in sediments, it is by being put into ultrasonic adsorption combined equipment in the River deposit containing PAHs, then put zoobenthos in a suitable place to breed in region after treatment to activate the activity of microorganism in deposit, planting submerged plant watermifoil and/or shallow water plantation rye grass are planted in region after treatment again, pass through physics, chemistry, the biological Trinitarian mode being combined, in the original location, the PAHs removed on the basis of River natural ecological environment in river deposit is not changed, the activity of aquatile and water plant in basin is improved simultaneously, purify water system；Deposit can need not be being moved, disposal field is not built additionally, is not destroying under water body deposit natural environmental condition substantially, realize decrement and the elimination of pollutant in situ, it is simple to operate and operating cost is low.
Description
Technical field
The invention belongs to organic contamination processing technology field, the present invention relates to organic contamination in a kind of River deposit
The processing method of thing, more particularly to a kind of method in situ for removing River polycyclic aromatic hydrocarbons in sediments.
Background technology
Polycyclic aromatic hydrocarbon compounds (PAHs) refer to the hydrocarbon containing more than 2 phenyl ring, are the delays in surface water
Contact scar thing, due to its water solubility is low and octanol-water system distribution coefficient high, thus be easy to be assigned to from aqueous phase deposit and
In organic matter, therefore, the generally existing in surface water, river mouth, bank band ecological environment, the environmental system such as soil, species is up to more than 100
Kind, 16 kinds of PAHs are included in the organic pollution blacklist of priority acccess control by Environmental Protection Agency in 1979.China is due to social economy
Fast development energy demand is continued to increase, while efficiency of energy utilization is relatively low, cause PAHs discharge capacitys constantly to rise, its lead to
Cross the approach such as discharge of wastewater, atmospheric sedimentation and enter water body, but because PAHs has strong hydrophobic property, be easily adsorbed in water body and hang
On floating particles, and deposit in bed mud and cause the pollution of deposit, when environmental conditions change, the PAHs energy in deposit
Enough enter water body, the pollution source as water pollution.PAHs can by food chain occur bioaccumulation and constantly be enriched with and
Amplification, and then serious threat is caused to the biotic population in water environment and group, including health, and cause the ecosystem most
Decay and the potential hazard degenerated occur eventually, and PAHs has stronger physiology and genetoxic, with stronger carcinogenicity and
Mutagenicity, natural degradation rate is low, with refractory organicses, once into environment, ecological environment and human health will be constituted and held
Threaten long.
The recovery technique both at home and abroad for PAHs marine sediments mainly includes physics, chemical and biological prosthetic skill at present
Art.Relative to the sediment remediation technology of physics, chemistry, bioremediation technology because its less investment, non-secondary pollution, improvement effect
Fruit persistently and is more and more favored.Divided according to processing place, showering technology and in-situ immobilization skill can be divided into again
The major class of art two.Presently mainly the PAHs of the collection sediment samples polluted are entered in laboratory stage using showering technology
Row analysis and research are, it is necessary to which the deposit on rivers and lakes riverbed is dug out and transported could be handled, it is necessary to be removed at equipment
Dynamic deposit simultaneously additionally builds disposal field, not only time-consuming, effort, cost, and destruction riverbed is ecological, and ecological environment is caused
Greatly destruction, this allows for showering technology and predominantly stays in laboratory stage, it is difficult to popularization and application.
The content of the invention
In order to solve to remove the problem of PAHs pollutions are present in River deposit in the prior art, the invention discloses
A kind of in situ method for removing River polycyclic aromatic hydrocarbons in sediments, by physics, chemistry, biological Trinitarian is combined
Mode, do not change the PAHs removed on the basis of River natural ecological environment in River deposit in the original location, together
When improve the activity of aquatile and water plant in river, purify water system；Can deposit need not be moved, it is not extra
Build disposal field, do not destroy under water body deposit natural environmental condition substantially, decrement and the elimination of pollutant are realized in situ,
It is simple to operate and operating cost is low.
The technical proposal of the invention is realized in this way：
A kind of method in situ for removing River polycyclic aromatic hydrocarbons in sediments, is achieved by the steps of：
（1）Ultrasonic adsorption combined equipment is put into the River deposit containing PAHs, to deposit small molecular
PAHs carries out degraded absorption；Ultrasound can make the PAHs in deposit migrate into water body, and can be to low point in S ＆ W
The PAHs of son amount has certain degradation；
（2）Passing through step（1）Zoobenthos is put in region after processing in a suitable place to breed to activate the activity of microorganism in deposit, and then
Microorganism and zoobenthos in deposit is promoted to degrade and/or absorb PHAs；
（3）Passing through step（2）Planting submerged plant watermifoil and/or shallow water plantation rye grass are planted in region after processing；Addition
Water plant on the one hand can by increasing oxygen in water, be that zoobenthos and aquatic animal provide more habitats, rush
Enter the activity of microorganism and zoobenthos in deposit, improve its degraded to PAHs, on the other hand, water plant was growing
Also part PAHs can be absorbed in journey.
As a kind of preferred embodiment, the ultrasonic adsorption combined device is the ultrasonic wave by acting on upstream deposits
At least one set of adsorbent equipment composition of device and downstream deposit surface, the adsorbent equipment is along water (flow) direction interval
Distribution.
As a kind of preferred embodiment, the ultrasonic unit includes inserting at least one set ultrasound in upstream deposits
Wave plate, steel plate, power supply and electric power connection line for mounting ultrasonic piece.
Preferably, the ultrasonic unit be by four parallel and equidistantly distributes ultrasonic wave plate, with ultrasonic wave plate top
Steel plate, the triangular prism with ultrasonic wave plate bottom surface welding, power supply and the electricity for connecting ultrasonic wave plate with power supply that face is welded and fixed
Source connecting line composition, in order that ultrasonic wave plate is preferably inserted in deposit, a seamed edge of the triangular prism is designed as
Dentalation, and make dentation seamed edge with and the face that is in contact of ultrasonic wave plate bottom surface it is relative.
As a kind of preferred embodiment, the shape ultrasonic unit is with the deposit in 100-200W frequency watershed
Ultrasonically treated 80-150min.
As a kind of preferred embodiment, the adsorbent equipment is by two wire nettings and is fixed between two wire nettings
Some adsorption roller compositions, the adsorption roller is built with sorbing material, and the adsorption roller is interspersed, it is ensured that pass through
Current are not omitted；And the pore structure for not allowing sorbing material to pass through is evenly equipped with the side wall of the adsorption roller.It is preferred that
The sorbing material is modified activated carbon.
As a kind of preferred embodiment, the modified activated carbon is by first by dodecyl front three ammonium bromide and 12
Sodium alkyl sulfonate is dissolved into surfactant solution, adds after cylindrical activated carbon stirring, filtering, drying, then in 105 DEG C of work
Change what is obtained；Wherein, cylindrical activated carbon, cationic surfactant dodecyl front three ammonium bromide and anion surface active
The mass ratio of agent dodecyl sodium sulfate is (4-6):1:1.In order to increase adsorption capacity of the activated carbon to PAHs, cation is added
Surfactant sodium dodecyl base front three ammonium bromide and anion surfactant dodecyl sodium sulfate, and then covert reduction
PAHs sediment-water distribution coefficient, makes the PAHs in deposit more move in water.
As a kind of preferred embodiment, it is respectively provided with and iron on the upper bottom surface and bottom surface of the adsorption roller
The lock that silk screen is fixed, is preferably designed to non-porous structure by upper bottom surface and bottom surface.
It is used as a kind of preferred embodiment, step（2）In zoobenthos be water earthworm, by water earthworm survival processes
The activity of microorganism in deposit is activated, so as to promote PAHs degraded, water earthworm can also absorb portion in survival processes in addition
Divide PAHs, further reduce the PAHs in S ＆ W.
Frequency, processing time, the piece number of ultrasonic wave plate, surface area size, the zoobenthos kind of ultrasonic wave plate of ultrasonic instrument
The parameter such as class and injected volume, watermifoil injected volume, rye grass injected volume can be according to the contaminated degree of deposit and hydrogeology
Condition is appropriately adjusted.
The present invention is degraded by way of ultrasonotomography, addition water plant and zoobenthos and removes River deposit
Neutralize the PAHs being discharged into water；The PAHs in natural water deposit is moved in water using ultrasonic power, passes through absorption
PAHs in water removal；The complex method being combined by physico-chemical process and biological method, original position is removed in deposit
PAHs, basin ecosystem environment is protected while reaching PAHs pollution problems in improvement deposit.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the structural representation of ultrasonic adsorption combined device.
Fig. 2 is the structural representation of adsorbent equipment.
Fig. 3 is the structural representation of adsorbent equipment up/down surface wire netting in Fig. 2.
Fig. 4 is the structural representation of adsorption roller in Fig. 2 adsorbent equipments.
Fig. 5 is the structural representation of Fig. 4 adsorption roller up/down bottom surface.
Fig. 6 is the structural representation of ultrasonic unit in Fig. 2.
Fig. 7 is the structural representation of ultrasonic wave plate in Fig. 6.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in figs. 1-7, first, ultrasonic adsorption combined equipment is put into the A basins deposit containing PAHs, it is described super
Sound adsorption combined device is by acting on the ultrasonic unit of upstream deposits and difference 10 meters of deposit surfaces downstream
Adsorbent equipment composition, the group number of the adsorbent equipment is twice of Vltrasonic device group number；The ultrasonic unit is by four
The steel plate and ultrasonic wave plate bottom surface that ultrasonic wave plate and ultrasonic wave plate top surface individual parallel and equidistantly distribute are welded and fixed are welded
Triangular prism, power supply and the electric power connection line composition that connects ultrasonic wave plate with power supply, a seamed edge of the triangular prism
For dentalation, and it is relative with the face that ultrasonic wave plate bottom surface is in contact, and each ultrasonic wave plate is with 150W frequency watershed
In the ultrasonically treated 120min of deposit；The adsorbent equipment（100cm×50cm×50cm）It is by two wire nettings and fixation
Some adsorption rollers between two wire nettings（Diameter 10cm, high 50cm）Composition, the adsorption roller is interspersed, to protect
Demonstrate,prove the current passed through not omit, the adsorption roller is equal built with modified activated carbon, and on the side wall of the adsorption roller
The pore structure for being slightly less than modified activated carbon particle diameter is furnished with, is leaked to the pore structure for preventing modified activated carbon from passing through in water body；Institute
The upper bottom surface and bottom surface for stating adsorption roller are non-porous structure, and are respectively provided with the non-porous knot of lock fixed with wire netting
Structure.Secondly, zoobenthos is put in a suitable place to breed in the region after above-mentioned processing for water earthworm to stimulate the work of microorganism in deposit
Property, so as to promote PAHs degraded, water earthworm can also absorb part PAHs in survival processes in addition, further reduce deposit
With the PAHs in water；Then, planting submerged plant watermifoil and shallow water plantation rye grass are planted in the region for put in a suitable place to breed water earthworm；Add
Add water plant on the one hand can by increasing oxygen in water, be that zoobenthos and aquatic animal provide more habitats,
Promote the activity of microorganism and zoobenthos in deposit, improve its degraded to PAHs, on the other hand, water plant is in growth
During can also absorb part PAHs.
Modified activated carbon is by the way that dodecyl front three ammonium bromide and dodecyl sodium sulfate first are dissolved into surface-active
Agent solution, is added after cylindrical activated carbon stirring 60min, filtering, drying, then activate what is obtained at 105 DEG C；Wherein, cylinder
Shape activated carbon, cationic surfactant dodecyl front three ammonium bromide and anion surfactant dodecyl sodium sulfate
Mass ratio is (4-6):1:1, the concentration of dodecyl front three ammonium bromide and dodecyl sodium sulfate is in surfactant solution
5g/L。
Wherein, 16 kinds of PAHs in A basins width 5m, the thickness 1m of deposit layer, deposit (naphthalene, acenaphthylene, acenaphthene, fluorenes, phenanthrene,
Anthracene, fluoranthene, pyrene, benzo（a）Anthracene, benzo（b）Fluoranthene, benzo（k）Fluoranthene, benzo（a）Pyrene, indeno [1,2,3-cd] pyrene, two
Benzo [a, h] anthracene, benzo [g, h, i] perylenes) amount be 21.2 mgkg-1, deliver 2000/m of water earthworm2, submerged plant fox-brush
The injected volume of algae is 50 plants/m2, 50 plants/m of rye grass planting2。
In order to which the effect of technical solution of the present invention, selection and A basins width and deposit layer state indifference is better described
Other B, C and D basin compares experiment, and B makees in basin blank control, does not make any processing to deposit；In C basins only ultrasound polyethylene-reducing
The two factor processing of solution and absorption；Water earthworm and plantation watermifoil, rye grass are only added in D basins；A-D basins are by corresponding position
The effect managed after half a year is as shown in table 1：
Table 1：Effect of the A-D basins after respective handling half a year
。
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (10)
1. a kind of method in situ for removing River polycyclic aromatic hydrocarbons in sediments, it is characterised in that be to be achieved by the steps of
's：
（1）Ultrasonic adsorption combined equipment is put into the River deposit containing PAHs, to deposit small molecular
PAHs carries out degraded absorption；
（2）Passing through step（1）Zoobenthos is put in region after processing in a suitable place to breed to activate the activity of microorganism in deposit；
（3）Passing through step（2）Planting submerged plant watermifoil and/or shallow water plantation rye grass are planted in region after processing.
2. the method as described in claim 1, it is characterised in that：The ultrasonic adsorption combined device is by acting on upstream deposition
At least one set of adsorbent equipment composition of the ultrasonic unit of thing and downstream deposit surface, the adsorbent equipment is along water
Stream direction is spaced apart.
3. method as claimed in claim 2, it is characterised in that：The ultrasonic unit includes inserting in upstream deposits extremely
Few one group of ultrasonic wave plate, steel plate, power supply and electric power connection line for mounting ultrasonic piece.
4. method as claimed in claim 3, it is characterised in that：The ultrasonic unit is parallel and equidistantly distribute by four
Ultrasonic wave plate, the steel plate being welded and fixed with ultrasonic wave plate top surface, the triangular prism with ultrasonic wave plate bottom surface welding, power supply and
The electric power connection line composition that ultrasonic wave plate is connected with power supply, a seamed edge of the triangular prism is dentalation, and with
The face that ultrasonic wave plate bottom surface is in contact is relative.
5. method as claimed in claim 4, it is characterised in that：The shape ultrasonic unit is with 100-200W frequency to river
The ultrasonically treated 80-150min of deposit in water system.
6. the method as described in any in claim 2-4, it is characterised in that：The adsorbent equipment is by two wire nettings and consolidated
Be scheduled between two wire nettings some adsorption rollers composition, the adsorption roller is interspersed, the adsorption roller built with
Sorbing material, and the pore structure for not allowing sorbing material to pass through is evenly equipped with the side wall of the adsorption roller.
7. method as claimed in claim 6, it is characterised in that：Set respectively on the upper bottom surface and bottom surface of the adsorption roller
There is the lock for being fixed with wire netting.
8. method as claimed in claim 6, it is characterised in that：The sorbing material is modified activated carbon.
9. method as claimed in claim 8, it is characterised in that：The modified activated carbon is by first by dodecyl front three bromine
Change ammonium and dodecyl sodium sulfate be dissolved into surfactant solution, add after cylindrical activated carbon stirring, filtering, drying,
Activate what is obtained at 105 DEG C again；Wherein, the matter of cylindrical activated carbon, dodecyl front three ammonium bromide and dodecyl sodium sulfate
Amount is than being (4-6):1:1.
10. method as claimed in claim 6, it is characterised in that：Step（2）In zoobenthos be water earthworm.
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| CN114133020A (en) * | 2021-11-15 | 2022-03-04 | 同济大学 | Method and system for in-situ remediation of river sediment polycyclic aromatic hydrocarbon pollution by ozone micro-nano bubbles and ultrasonic waves |
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