CN105013799A - Method for degrading benzopyrene/lead pollution in road dust through irradiation - Google Patents
Method for degrading benzopyrene/lead pollution in road dust through irradiation Download PDFInfo
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- CN105013799A CN105013799A CN201510399000.8A CN201510399000A CN105013799A CN 105013799 A CN105013799 A CN 105013799A CN 201510399000 A CN201510399000 A CN 201510399000A CN 105013799 A CN105013799 A CN 105013799A
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- road dust
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Abstract
The invention discloses a method for degrading benzopyrene/lead pollution in road dust through irradiation. The method includes the steps that a, road dust is collected through a road dust collector; b, n-hexane is added into the collected road dust for ultrasonic cleaning and benzene and isopropyl alcohol mixed liquid is added into the collected road dust for ultrasonic cleaning; water is added for ultrasonic cleaning; and the cleaned road dust is placed in a muffle furnace to be sintered; c, a benzopyrene solution with the concentration being 1-2 ppm and a lead oxide solution are added into the processed road dust to be evenly mixed with the processed road dust; clean liquid is removed through a centrifuge in a centrifuging manner; and the processed road dust is evenly laid on glass fiber filter paper with the diameter being 4.0-4.7 cm to be frozen and dried; and d, the glass fiber filter paper with the benzopyrene and the lead oxide road dust is taken and placed in a surface vessel; and the benzopyrene/lead pollution in the road dust is subjected to irradiation processing and degraded through electron beams and ultraviolet light irradiation. The method is simple in technology and convenient to operate, the road dust with benzopyrene/lead mixtures is processed through the electron beams and the ultraviolet light irradiation, the degrading rate of the benzopyrene in the road dust is high, and the degrading rate of the benzopyrene can be 60% or higher.
Description
Technical field
The present invention relates to a kind of method utilizing BaP/lead contamination in irradiation-induced degradation road dust, belong to Application of Nuclear Technology and environmental protection technical field.
Background technology
Along with urban industry development, road dust has become of Vehicle Exhaust Particulate and has mainly assembled carrier, and the impact of road dust on environment is mainly manifested in following two aspects.First, under the flow perturbation effect that road dust produces at wind and passing motor vehicles, can again suspend to enter in air becomes an aerocolloidal part, and moves with air flowing, thus pollutes the air in city; Secondly, in road dust wind in an atmosphere, motor vehicle flow perturbation and rain-out process, earth's surface or groundwater regime can be entered by road street sewer again, city and outskirts area water body and deposit are polluted.Therefore, above-mentioned road dust is the place that in big city, various pollutant emission is assembled, and is again the pollution sources causing urban place and ambient atmosphere, water body and deposit again to pollute.
Wherein benzo (α) pyrene (BaP) is representative polycyclic aromatic hydrocarbon (PAHs) common in road dust, is a kind of common high activity indirect-acting carcinogen.There are some researches show, BaP has spread effect to eyes, skin.Activate with mixed-function oxidase in liver, pneumonocyte microsome after BaP enters body and be converted into tens of kinds of metabolites, forming covalent bond with DNA is combined, and causes DNA damage, and cell just canceration may occur.Therefore, the life and health and ecological environment of giving people, after sucking the particle containing BaP, are caused negative effect by people.
Heavy metal is ubiquity in a class environment, it is the important pollutant with potential hazard, wherein lead is one of heavy metal contaminants extensively existed in a class environment, and it is additive conventional in gasoline, and this additive has the controlled quentity controlled variable of regulation in multiple country and local discharge standard.Along with the high speed development of Domestic Automotive Industry, distribution influence expanding day plumbous in road dust, in road dust, lead can not be degraded in the environment, can only transform between each valence state form, and participate in food chain circulation, finally accumulating in vivo, is a class persistent pollutant.Benzopyrenes compound is a class persistence organic pollutant, and it is easily attached on road dust, cannot degrade in natural environment.
At present, the processing method of road dust is by landfill or washing.These two kinds of methods, will be transferred to water body after the BaP/heavy-metal composite pollution in road dust or enter soil, and its pollution can enter human body by plant and biological approach, works the mischief to human body.
Electron beam irradiation is a kind of advanced oxidization method.It is suitable for the degraded that Some Organic Pollutants comprises unsaturated organic compound, aromatic hydrocarbon and aromatic, has good degrading effect, reacts quick advantage.During due to electron beam and water effect, by elastic scattering, the inelastic scatter of the electronics in electron beam and the electronics in hydrone, generate various active ion (OH, H, e
-aq), the solute molecule in these active particles and waste water reacts, and acts on and pollutes on molecule, realize efficient degradation pollutant.
Ultraviolet light chemical degradation typically refers to: organic matter under the action of uv light, is progressively oxidized to low molecule intermediate product, finally generates C0
2, H
2o and other ion are as N0
3 -process. under UV-irradiation, BaP also can realize degraded.
In order in the face of BaP/plumbous combined pollution process difficult problem, by the combined pollution of BaP/lead in electron beam and ultraviolet cooperating process road dust, realize maximum effect, good application prospect will be had.
Summary of the invention
The object of the invention is the defect existed for prior art, provide a kind of method utilizing BaP/lead contamination in irradiation-induced degradation road dust, it is simple, easy to operate that the method has technique, the road dust containing BaP/plumbous class mixture can be processed, and the feature that in degraded road dust, the degradation rate of BaP is high.
For achieving the above object, a kind of method utilizing BaP/lead contamination in irradiation-induced degradation road dust of the present invention, is characterized in that the concrete steps of the method are:
A. gather road dust with road dust collector, road dust particle diameter is 0.1 ~ 3 μm;
B. the road dust of collection is added n-hexane ultrasonic cleaning, add benzene and the ultrasonic cleaning of isopropyl alcohol mixed liquor; Add water ultrasonic cleaning; Clean rear centrifuge, centrifugal rear tinfoil parcel, calcine in the Muffle furnace putting into 350 ~ 450 DEG C, calcining at constant temperature time 10 ~ 15h;
C. get the road dust 0.5 ~ 1.0g after step b purified treatment, under room temperature, be that BaP solution and the lead oxide solution of 1 ~ 2ppm joins in road dust by concentration, mix; With centrifuge, centrifugal rear removal clear liquid; Road dust containing BaP and lead oxide is evenly laid in the glass fiber filter paper that diameter is 4.0 ~ 4.7cm, freeze drying;
D. get the glass fiber filter paper containing BaP and lead oxide road dust that two panels diameter is 4.0 ~ 4.7cm, be put in surface plate; Radiation treatment is carried out under accelerator; The energy accelerating electronics is 0.5 ~ 0.8MeV, and electronic beam current intensity is 5 ~ 11mA, and the processing time is 0 ~ 120s; Again the glass fiber filter paper containing BaP and lead oxide road dust is put into quartz ampoule, with UV-irradiation 0 ~ 10h;
E. the road dust containing BaP/lead after steps d being degraded imports in the abstraction pool of rapid extracting device (ASE), and extraction sample 0.4 ~ 0.5g joins the anhydrous Na of 0.1 ~ 0.2g
2sO
4, and adding interior mark, extract mixed liquor carrene: n-hexane=3:1, extracts, pressure 0 ~ more than 0.8MPa, empty van heats up 20 ~ 100 DEG C, and extraction process about 2 ~ 5min obtains 40 ~ 50ml extract;
F. be 30cm in length, diameter is be packed into pillar with the order of extra large sand, aluminium oxide and extra large sand in the glass tube of 1.5cm, and the extra large sand in pillar and the volume ratio of aluminium oxide are 2:1;
G. the pillar that the extract step f obtained by step e obtains filters, and is filled in 250mL boiling flask; With Rotary Evaporators under the condition of 35 ~ 40 DEG C, 55 ~ 60 revs/min, the extract after filtering is concentrated, is concentrated into 1.5 ~ 2ml, purge with nitrogen and be concentrated into 0.8 ~ 1ml, load in test bottle;
H. step g is obtained concentrated after sample, be that 30 ~ 275 ° of C enter gas chromatograph-mass spectrometer (GC-MS) (GC/MS) and test at injector temperature; Record the concentration of BaP.
Compared with prior art, the present invention has following outstanding substantive distinguishing features and significant advantage: it is simple, easy to operate that the inventive method has technique, the road dust of BaP/plumbous class mixture is contained by electron beam and ultraviolet light irradiation process, in its degraded road dust, the degradation rate of BaP is high, its degradation rate reaches more than 60%, the method can be applicable to the superfine particulate matter containing BaP/plumbous class mixture produced in industrial treatment industrial production, mineralising BaP/plumbous class mixture, is specially adapted to persistence organic pollutant and heavy metal contained by degraded road dust.
Accompanying drawing explanation
Fig. 1 is ESEM (SEM) figure of the road dust that road dust collector gathers.
Fig. 2 is the photocatalysis performance curve map of BaP in road dust.
Detailed description of the invention
After now by reference to the accompanying drawings embodiments of the invention being specifically described in.
Embodiment 1
A kind of method utilizing BaP/lead contamination in irradiation-induced degradation road dust of the present invention, has following processing procedure and step:
A. gather road dust with road dust collector, road dust particle diameter is 0.1 ~ 3 μm;
B. the road dust of collection is added n-hexane ultrasonic cleaning, add benzene and the ultrasonic cleaning of isopropyl alcohol mixed liquor; Add water ultrasonic cleaning; Clean rear centrifuge, centrifugal rear tinfoil parcel, calcine in the Muffle furnace putting into 350 ~ 450 DEG C, calcining at constant temperature time 10 ~ 15h;
C. get the road dust 0.5 ~ 1.0g after step b purified treatment, under room temperature, be that BaP solution and the lead oxide solution of 1 ~ 2ppm joins in road dust by concentration, mix; With centrifuge, centrifugal rear removal clear liquid; Road dust containing BaP and lead oxide is evenly laid in the glass fiber filter paper that diameter is 4.0 ~ 4.7cm, freeze drying;
D. get the glass fiber filter paper containing BaP and lead oxide road dust that two panels diameter is 4.0 ~ 4.7cm, be put in surface plate; Radiation treatment is carried out under accelerator; The energy accelerating electronics is 0.5 ~ 0.8MeV, and electronic beam current intensity is 5 ~ 11mA, and the processing time is 0 ~ 120s; Again the glass fiber filter paper containing BaP and lead oxide road dust is put into quartz ampoule, with UV-irradiation 0 ~ 10h;
E. the road dust containing BaP/lead after steps d being degraded imports in the abstraction pool of rapid extracting device (ASE), and extraction sample 0.4 ~ 0.5g joins the anhydrous Na of 0.1 ~ 0.2g
2sO
4, and adding interior mark, extract mixed liquor carrene: n-hexane=3:1, extracts, pressure 0 ~ more than 0.8MPa, empty van heats up 20 ~ 100 DEG C, and extraction process about 2 ~ 5min obtains 40 ~ 50ml extract;
F. be 30cm in length, diameter is be packed into pillar with the order of extra large sand, aluminium oxide and extra large sand in the glass tube of 1.5cm, and the extra large sand in pillar and the volume ratio of aluminium oxide are 2:1;
G. the pillar that the extract step f obtained by step e obtains filters, and is filled in 250mL boiling flask; With Rotary Evaporators under the condition of 35 ~ 40 DEG C, 55 ~ 60 revs/min, the extract after filtering is concentrated, is concentrated into 1.5 ~ 2ml, then be concentrated into 0.8 ~ 1ml with nitrogen purging, load in test bottle;
H. step g is obtained concentrated after sample, be that 30 ~ 275 ° of C enter gas chromatograph-mass spectrometer (GC-MS) (GC/MS) and test at injector temperature, record the concentration of BaP.
In the present embodiment, for containing BaP/plumbous class mixture concentration be the road dust of 2.2ng/g, accelerator electron energy is 0.8MeV, electronic beam current intensity is at 11mA, irradiation dose is in 6kGy situation, again through UV-irradiation 12 hours, after above-mentioned process, detect through entering gas chromatograph-mass spectrometer (GC-MS), wherein BaP degradation rate can reach 70% as depicted in figs. 1 and 2, in figure 2, ━ ━ is represented in atmosphere with the foursquare curve of band, BaP in road dust is the degraded situation after 12 hours at irradiation 5s and ultraviolet lighting, represent that ━ ━ is with in the air of aqueous vapor with the curve of band round dot, BaP in road dust is the degraded situation after 12 hours at irradiation 5s and ultraviolet lighting, as can be seen from Fig. 1 and Fig. 2, proposed by the invention utilizes the method for BaP/lead contamination in irradiation-induced degradation road dust at identical conditions, wherein, BaP degradation rate can reach 70%.
Claims (1)
1. utilize a method for BaP/lead contamination in irradiation-induced degradation road dust, it is characterized in that, the concrete steps of the method are as follows:
A. gather road dust with road dust collector, road dust particle diameter is 0.1 ~ 3 μm;
B. the road dust of collection is added n-hexane ultrasonic cleaning, add benzene and the ultrasonic cleaning of isopropyl alcohol mixed liquor; Add water ultrasonic cleaning; Clean rear centrifuge, centrifugal rear tinfoil parcel, calcine in the Muffle furnace putting into 350 ~ 450 DEG C, calcining at constant temperature time 10 ~ 15h;
C. get the road dust 0.5 ~ 1.0g after step b purified treatment, under room temperature, be that BaP solution and the lead oxide solution of 1 ~ 2ppm joins in road dust by concentration, mix; With centrifuge, centrifugal rear removal clear liquid; Road dust containing BaP and lead oxide is evenly laid in the glass fiber filter paper that diameter is 4.0 ~ 4.7cm, freeze drying;
D. get the glass fiber filter paper containing BaP and lead oxide road dust that two panels diameter is 4.0 ~ 4.7cm, be put in surface plate; Radiation treatment is carried out under accelerator; The energy accelerating electronics is 0.5 ~ 0.8MeV, and electronic beam current intensity is 5 ~ 11mA, and the processing time is 0 ~ 120s; Again the glass fiber filter paper containing BaP and lead oxide road dust is put into quartz ampoule, with UV-irradiation 0 ~ 10h;
E. the road dust containing BaP/lead after steps d being degraded imports in the abstraction pool of rapid extracting device (ASE), and extraction sample 0.4 ~ 0.5g joins the anhydrous Na of 0.1 ~ 0.2g
2sO
4, and adding interior mark, extract mixed liquor carrene: n-hexane=3:1, extracts, pressure 0 ~ more than 0.8MPa, empty van heats up 20 ~ 100 DEG C, and extraction process about 2 ~ 5min obtains 40 ~ 50ml extract;
F. be 30cm in length, diameter is be packed into pillar with the order of extra large sand, aluminium oxide and extra large sand in the glass tube of 1.5cm, and the extra large sand in pillar and the volume ratio of aluminium oxide are 2:1;
G. the pillar that the extract step f obtained by step e obtains filters, and is filled in 250mL boiling flask; With Rotary Evaporators under the condition of 35 ~ 40 DEG C, 55 ~ 60 revs/min, the extract after filtering is concentrated, is concentrated into 1.5 ~ 2ml, purge with nitrogen and be concentrated into 0.8 ~ 1ml, load in test bottle;
H. step g is obtained concentrated after sample, be that 30 ~ 275 ° of C enter gas chromatograph-mass spectrometer (GC-MS) (GC/MS) and test at injector temperature; Record the concentration of BaP.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168164A (en) * | 2006-10-27 | 2008-04-30 | 中国科学院沈阳应用生态研究所 | Ultraviolet degradation method for soil polluted by polycyclic hydrocarbon |
| CN101176879A (en) * | 2006-11-08 | 2008-05-14 | 中国科学院沈阳应用生态研究所 | Photocatalysis method for removing PAHs in soil |
| CN101176880A (en) * | 2006-11-08 | 2008-05-14 | 中国科学院沈阳应用生态研究所 | Method of the degradation of polycyclic aromatic hydrocarbon compounds in soil combining TiO2 and ultraviolet light |
| CN102260591A (en) * | 2011-07-01 | 2011-11-30 | 华南农业大学 | Method for removing benzopyrene from edible oil |
| DE102011016043A1 (en) * | 2011-04-04 | 2012-03-29 | Angela Boley | Device for performing biological degradation test of benzo(a)pyrene in e.g. sludge using closed reaction vessel, has reaction vessel whose rotation speed is variable during operation of apparatus |
| CN104383654A (en) * | 2014-10-22 | 2015-03-04 | 上海大学 | Method adopting electron beam irradiation to remove BaP in simulation road dust |
-
2015
- 2015-07-08 CN CN201510399000.8A patent/CN105013799A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168164A (en) * | 2006-10-27 | 2008-04-30 | 中国科学院沈阳应用生态研究所 | Ultraviolet degradation method for soil polluted by polycyclic hydrocarbon |
| CN101176879A (en) * | 2006-11-08 | 2008-05-14 | 中国科学院沈阳应用生态研究所 | Photocatalysis method for removing PAHs in soil |
| CN101176880A (en) * | 2006-11-08 | 2008-05-14 | 中国科学院沈阳应用生态研究所 | Method of the degradation of polycyclic aromatic hydrocarbon compounds in soil combining TiO2 and ultraviolet light |
| DE102011016043A1 (en) * | 2011-04-04 | 2012-03-29 | Angela Boley | Device for performing biological degradation test of benzo(a)pyrene in e.g. sludge using closed reaction vessel, has reaction vessel whose rotation speed is variable during operation of apparatus |
| CN102260591A (en) * | 2011-07-01 | 2011-11-30 | 华南农业大学 | Method for removing benzopyrene from edible oil |
| CN104383654A (en) * | 2014-10-22 | 2015-03-04 | 上海大学 | Method adopting electron beam irradiation to remove BaP in simulation road dust |
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