CN106430514A - Modified nanometer iron-carbon composite and application thereof - Google Patents
Modified nanometer iron-carbon composite and application thereof Download PDFInfo
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- CN106430514A CN106430514A CN201610854866.8A CN201610854866A CN106430514A CN 106430514 A CN106430514 A CN 106430514A CN 201610854866 A CN201610854866 A CN 201610854866A CN 106430514 A CN106430514 A CN 106430514A
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- 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
- C02F1/70—Treatment of water, waste water, or sewage by reduction
- C02F1/705—Reduction by metals
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Abstract
The invention relates to a water treatment material, in particular to a modified nanometer iron-carbon composite and application thereof. An alcohol-water system is added into a three-mouth flask with a stirrer, rhamnolipid is added during stirring and dissolved, ferrous sulfate is added, a sodium borohydride solution is added after thorough dissolution is performed, stirring continues to be performed for 10 min, activated carbon and nanometer iron are added, stirring continues to be performed for 20 min, and the prepared modified nanometer iron-carbon is subjected to repeated alcohol washing and water washing, and stored into absolute ethyl alcohol finally. The rhamnolipid is adopted for modifying nanometer iron, agglomeration is reduced, the modified nanometer iron is loaded on activated carbon with the large specific area and large pore volume, and the modified nanometer iron-carbon composite is formed, so that nanometer iron agglomeration is reduced, the material particle size is increased, and influences on groundwater environment are reduced while the dispersibility is improved.
Description
Technical field
The present invention relates to a kind of material for water treatment, specially modified Nano ferrum carbon composite and its application.
Background technology
Being excessively used of nitrogenous fertilizer, the reason such as waste water irrigation causes nitrate pollution increasingly serious, drink containing
The nitrate drinking water of excessive concentrations can be converted into nitrite in vivo, and then causes blue baby's disease and metahemoglobin
Disease, at present, removes nitrate in groundwater and mainly adopts in-situ immobilization method wherein PRB (permeable reactive barrier) to rely on low cost
Honest and clean, little to ecological environmental disturbances, it is most widely used without advantages such as additionaling powers.When contaminant stream is through PRB reaction body of wall
Can with body of wall in active material occur physics, chemistry, biology etc. react, thus reach removal pollutant or reduce pollutant dense
Degree purpose.
Because Nanoscale Iron has the advantages of reactivity is strong, and surface area is big, often it is added to instead as reducing agent filler
Answer body of wall to remove various pollutant, by simulation experiment study Nanoscale Iron in PRB to heavy metals such as Cd, Cu, Ni, Pb, Zn
Removal effect, show that removal efficiency is followed successively by Pb from high to low>Cu>Zn>Cd>Ni, by being removed using cladding nanometer iron
Organic chlorohydrocarbon in subsoil water, when simulation post runs 120 pore volumes, chlorohydrocarbon clearance reaches 85%.But in concrete application
When, Nanoscale Iron is easily reunited in PRB and is resulted in blockage, and is susceptible to passivation, corrosion etc., and then affects its removal effect.
Content of the invention
For above-mentioned technical problem, the present invention provides a kind of modified Nano ferrum carbon composite, in PRB it is not easy to
Reunite and block.Specifically technical scheme is：
Modified Nano ferrum carbon composite, prepares gained by following methods,
Nanoscale Iron adopts liquid phase reduction to prepare, and adds volume ratio to be 1 in the there-necked flask equipped with agitator:2
Alcohol-water system 200mL, mixing speed is adjusted to 500rpm；Add green vitriol, to be dissolved completely afterwards use feeder with
The speed of 2mL/min adds sodium borohydride solution, continues stirring, whole process used time 30min and with nitrogen stripping deoxygenation；Alcohol water
System forms for second alcohol and water；Alcohol is washed and is adopted ethanol.The Nanoscale Iron preparing is carried out multiple alcohol wash, wash, and finally preserve
Stand-by in dehydrated alcohol.Reactional equation:
The preparation of modified Nano ferrum charcoal, adds volume ratio to be 1 in the there-necked flask equipped with agitator:2 alcohol water body
It is 200mL, mixing speed is adjusted to 500rpm；Add rhamnolipid simultaneously to dissolve, add green vitriol, to be dissolved completely after
With feeder, sodium borohydride solution is added with the speed of 2mL/min, continue stirring 10min, add activated carbon and Nanoscale Iron, continue
The modified Nano preparing ferrum charcoal is carried out multiple alcohol wash, wash after stirring 20min, and be finally saved in dehydrated alcohol and treat
With.Alcohol-water system forms for second alcohol and water；Alcohol is washed and is adopted ethanol.
Wherein, activated carbon is ature of coal charcoal, and grinding in advance sieves makes its particle diameter be 75 μm, and deionized water is cleaned multiple times rearmounted
In vacuum drying oven, dry to constant weight at 110 DEG C.
Nanoscale Iron and quality of activated carbon are than for 5:2.
The application of modified Nano ferrum carbon composite, for filling permeable reactive barrier, removes nitrate nitrogen in subsoil water.
Modified Nano ferrum carbon composite and its application that the present invention provides, are changed to Nanoscale Iron using rhamnolipid
Property, reduce and reunite, and modified Nanoscale Iron is supported on the activated carbon that specific surface area is big, pore volume is big, form modified Nano
Ferrum carbon composite, reduces Nanoscale Iron further and reunites and increase material particle size, wherein rhamnolipid belongs to biotype surface and lives
Property agent, comparing chemical surfactant has hypotoxicity and stronger biodegradable, using rhamnolipid, Nanoscale Iron is entered
Row is modified, improves the impact reducing while its dispersibility to groundwater environment.
Brief description
Fig. 1 is the PRB analog structural representation of embodiment；
Fig. 2 (a) is the SEM figure of unmodified Nanoscale Iron；
Fig. 2 (b) is the SEM figure of modified Nano ferrum carbon composite；
Fig. 2 (c) is the XRD contrast through the modified Nanoscale Iron carbon composite of rhamnolipid with unmodified Nanoscale Iron/charcoal
Figure；
Fig. 3 is the sedimentation experiment comparison diagram of variable concentrations modified Nano ferrum carbon composite；
Fig. 4 is different materials settling test comparison diagram；
Fig. 5 is that modified Nano ferrum carbon composite dosage removes the impact relation of nitrate nitrogen to PRB；
Fig. 6 is that initial nitrate removes the impact graph of a relation of nitrate nitrogen to PRB；
Fig. 7 is that pH value removes the impact graph of a relation of nitrate nitrogen to PRB；
Fig. 8 is that different in flow rate removes the impact graph of a relation of nitrate nitrogen to PRB；
Fig. 9 is that packing material not of the same race removes the impact graph of a relation of nitrate nitrogen to PRB；
Figure 10 is the impact graph of a relation to removal efficiency for the activated carbon dosage.
Specific embodiment
It is described in conjunction with the embodiments the specific embodiment of the present invention.
Modified Nano ferrum carbon composite, that is, modified Nano ferrum/charcoal, prepares gained by following methods,
Nanoscale Iron adopts liquid phase reduction to prepare, and adds volume ratio to be 1 in the there-necked flask equipped with agitator:2
Alcohol-water system 200mL, mixing speed is adjusted to 500rpm；Add green vitriol, to be dissolved completely afterwards use feeder with
The speed of 2mL/min adds sodium borohydride solution, continues stirring, whole process used time 30min and with nitrogen stripping deoxygenation；
The Nanoscale Iron preparing is carried out multiple alcohol wash, wash, and be finally saved in stand-by in dehydrated alcohol；
The preparation of modified Nano ferrum charcoal, adds volume ratio to be 1 in the there-necked flask equipped with agitator:2 alcohol water body
It is 200mL, mixing speed is adjusted to 500rpm；Add rhamnolipid simultaneously to dissolve, add green vitriol, to be dissolved completely after
With feeder, sodium borohydride solution is added with the speed of 2mL/min, continue stirring 10min, add activated carbon and Nanoscale Iron, continue
After stirring 20min, the modified Nano preparing ferrum charcoal is carried out multiple alcohol to wash, wash, and be finally saved in stand-by in dehydrated alcohol
Wherein, activated carbon is ature of coal charcoal, and grinding in advance sieves makes its particle diameter be 75 μm, and deionized water is cleaned multiple times rearmounted
In vacuum drying oven, dry to constant weight at 110 DEG C.
Nanoscale Iron and quality of activated carbon are than for 5:2.
The application of modified Nano ferrum carbon composite, for filling permeable reactive barrier, removes nitrate nitrogen in subsoil water.
Continuous wall PRB is simulated using Organic glass column, the product that research above example prepares gained is in operation and receives
The problems such as rice ferrum filler blocks and passivation is corroded, and investigate nitrate, Nanoscale Iron/charcoal dosage, Nanoscale Iron and activated carbon
Proportioning, migration velocity, the factor such as pH removes the impact of nitrate nitrogen to PRB, optimizes application in PRB for the Nanoscale Iron.
Right
Reagent:Green vitriol (FeSO4·7H2O), sodium nitrate (NaNO3) (Tianjin recovery development in science and technology is limited
Company), sodium borohydride (NaBH4), sodium hydroxide (NaOH), hydrochloric acid (HCl), dehydrated alcohol (Chengdu section dragon chemical reagent
Factory), it is pure that activated carbon (C) (Chongqing Mao Ye chemical reagent company limited) is analysis.(45%, Wo Taisi chemical industry has rhamnolipid
Limit company), nitrogen (N2) (>=99.99%, Chengdu east wind gas company limited), quartz sand (Li Yuan building materials company).
Instrument:X-ray diffractometer (DX-700, China), ultraviolet spectrophotometer (TU-1901, China), acidometer
(PHS-3C+, China), simple peristaltic pump (AB08, China), scanning electron microscope (JSM-7500F, Japan), circulating water type vacuum pump
(SHZ-D (III), China).
Prepare the suspension stability of gained modified Nano ferrum carbon composite using determined by ultraviolet spectrophotometry embodiment.
Measure the absorbance of a modified Nano ferrum carbon composite suspension every 2min under the conditions of wavelength is for 508nm, and analyzes
Surveyed absorbance is changed in time with initial absorbance ratio, and the bigger suspension of ratio is better, and suspending stabilized performance is from side
Reaction modifying Nanoscale Iron the carbon composite removal ability to pollutant and degree of congestion etc. in PRB.Select 1,2,4,6,
The modified Nano ferrum carbon composite of 8g/L is examining or check the impact to suspension stability for the concentration；Concentration is selected to be the modification of 1g/L
Nanoscale Iron carbon composite, Nanoscale Iron/charcoal, modified Nano ferrum, Nanoscale Iron, activated carbon is examining or check the suspending stabilized of different materials
Property.
Experiment removes nitrate nitrogen, a height of 30cm of Organic glass column, internal diameter using the unit simulation Nanoscale Iron shown in Fig. 1/charcoal
For 3cm.
Device is laterally zygomorphic machine glass column construction, and bottom is inlet and outlet device 1, is provided with water distributing plate and is lined with yarn
Cloth, prevents from blocking.Inlet and outlet device 1 top is 1～2mm particle diameter quartz sand 2 of filling, highly for 0.5cm, is filled in post two ends
Play buffer protection function.1～2mm particle diameter quartz sand 2 top is 0.1～0.2mm particle diameter quartz sand 3, highly for 13.5cm, makees
For simulation water-bearing layer permeating medium.0.1～0.2mm particle diameter quartz sand 3 top is dismountable two pieces and has supporting role
Water distributing plate 4, is arranged in the middle of column construction, is separated by 1cm between two pieces of water distributing plates 4, is active filler material between two pieces of water distributing plates 4
Material 5, upper and lower ends inlet and outlet device 1 is respectively outlet and injection port.Post will be patted during packing material toward in Organic glass column
Wall ensures filling uniformly.Quartz sand used first passes through pickling, then deionized water repeatedly rinse and dry after use.
By the nitrate nitrogen prepared using sodium nitrate (20,40,60mg/L) simulated water sample from injection port according to certain speed
(0.5,1,2mL/min) inject, the time interval when outlet that brings into operation starts sample for the record, and when going out sample every
20min takes a sample, takes 4mL sample liquid with injector for medical purpose, adopts determined by ultraviolet spectrophotometry after 0.22 μm of membrane filtration
Nitrate nitrogen in 220nm and 275nm place's wavelength absorbance and calculates its concentration, draws nitrate nitrogen clearance change in 100min after water outlet
Change curve.Consider modified Nano ferrum carbon composite dosage, the concentration of nitrate-N pollution liquid, pH, the factor pair such as flow velocity respectively
Nitrate nitrogen removes impact, contrasts modified Nano ferrum carbon composite, Nanoscale Iron, activated carbon, particle diameter is 0.1～0.2mm's simultaneously
The different fillings such as quartz sand and different activities charcoal remove impact with Nanoscale Iron proportioning to nitrate nitrogen.
Testing result：
1st, modified Nano ferrum carbon composite characterizes
Fig. 2 (a) is SEM (scanning electron microscope) figure of unmodified Nanoscale Iron, and nano iron particles reunion is serious and not of uniform size, figure
2 (b) is that the SEM of modified Nano ferrum carbon composite schemes it can be seen that being loaded with nano iron particles, Nanoscale Iron on piece shaped activated carbon
In the range of 60～100nm and major part becomes chain form to particle diameter, reunites inconspicuous.Fig. 2 (c) is through modified the receiving of rhamnolipid
Meter Tie/charcoal and XRD (X-ray diffraction) comparison diagram of unmodified Nanoscale Iron carbon composite, both 2 θ are at 44.8 °, equal at 26.8 °
There is Fe0Diffraction maximum with C.Compare unmodified Nanoscale Iron/charcoal, Fe in the XRD figure of modified Nano ferrum carbon composite0Feature
Peak is weaker, and possible cause coats to Nanoscale Iron for rhamnolipid, and inspection does not measure obvious Fe0Characteristic peak.
2nd, PRB packing material settling character
Fig. 3 is the suspending stabilized linearity curve of variable concentrations modified Nano ferrum carbon composite, is combined with modified Nano ferrum charcoal
Material concentration increases, and suspension stability is poorer, shows that increasing modified Nano ferrum carbon composite concentration can aggravate modified Nano ferrum
Reunite between carbon composite.During standing 50min, 1,2,4g/L modified Nano ferrum carbon composite absorbance and initial extinction
The ratio of degree is respectively 0.387,0.204,0.113, and suspension stability amplitude of variation is larger, and 6,8g/L modified Nano ferrum charcoals are multiple
Condensation material absorbance is respectively 0.081,0.100 with the ratio of initial absorbance, and change is inconspicuous, illustrates in this experiment condition
Under, when modified Nano ferrum carbon composite concentration is more than 6g/L, its agglomeration reaches capacity, and significant change no longer occurs.
Fig. 4 is the settling test of different PRB packing materials, modified Nano ferrum, the suspension of modified Nano ferrum carbon composite
Stability reduces successively, Nanoscale Iron, unmodified Nanoscale Iron/charcoal, and activated carbon suspension stability is suitable and all poor；Through modified
Nanoscale Iron/charcoal, Nanoscale Iron suspension stability is all high than unmodified, in conjunction with modified Nano ferrum carbon composite XRD figure and Fructus rhamni (Rhamnus davurica Pall.)
The property analysis of glycolipid understand, rhamnolipid is coated on Nanoscale Iron and Nanoscale Iron/carbon surface, form bilayer structure, material
Between granule because of electrostatic repulsion away from[14], and then reduce reunion, improve the dispersibility of material；Suspension due to activated carbon
Less stable, modified Nano ferrum carbon composite is affected by activated carbon, and suspension stability decreases.
3rd, PRB removes the influence factor of nitrate nitrogen
Fig. 5 be contaminated liquid nitrate be 40mg/mL, flow velocity be 1mL/min, pH=7, Nanoscale Iron and activated carbon ratio
It is worth for 5:Under conditions of 2, modified Nano ferrum carbon composite loading removes the impact of nitrate nitrogen to PRB, when loading is
0.05th, 0.1, during 0.2g, the clearance of nitrate nitrogen, less than 20%, does not have obvious graded.But loading increases to more than 0.5g
When, the clearance of stable rear nitrate nitrogen all reaches more than 50%, and increases with modified Nano ferrum carbon composite loading, nitre
State nitrogen removal efficiency gradually steps up, when going out sample 80min, PRB pair of filling 0.5,1,1.5g modified Nano ferrum carbon composite
The clearance of nitrate nitrogen respectively reaches as 53.37,78.12,99.87%.
Under the conditions of experiment is recorded simultaneously at this, start the time interval of sample from the outlet that brings into operation, and flat to 3 groups
The meansigma methodss of row experiment are collected, and are shown in Table 1.When flow velocity one timing, time interval can qualitatively react PRB degree blocked.
With the increase of modified Nano ferrum carbon composite dosage, time interval is longer, shows that modified Nano ferrum carbon composite exists
There is a certain degree of obstruction in PRB, and dosage is more, block more serious.In conjunction with variable concentrations modified Nano ferrum in Fig. 3
Carbon composite settling test understands, when reaction wall volume is identical, increases with modified Nano ferrum carbon composite dosage,
I.e. concentration increases, sedimentation degree aggravation, in turn results in PRB blocking aggravation.
Different Nanoscale Iron/charcoal the dosage of table 1 is to the impact going out the sample time
Table 1Effect of different dosages of Nano Iron/Carbon on initial
sample interval
Fig. 6 be modified Nano ferrum carbon composite dosage be 1g, flow velocity be 1mL/min, pH=7, Nanoscale Iron and work
Property charcoal mass ratio be 5:Under conditions of 2, the nitrate-N pollution liquid for 20,40,60mg/L for the concentration removes nitrate nitrogen efficiency to PRB
Impact.When going out flow liquid and gradually tending towards stability, the higher contaminated liquid of nitrate, PRB is lower on the contrary to its removal efficiency.?
When outlet goes out sample 100min, the concentration of contaminated liquid nitrate nitrogen is 20,40,60mg/L PRB device, and the clearance of nitrate nitrogen divides
Not Wei 85.6,81.3,41.2%, under the conditions of this, device starts the time-interval averaging value phase of sample from the outlet that brings into operation
Difference, less than 1min, is 75min.When showing that packing material species and consumption are identical, the water penetration of whole device is almost identical.Still
The possible cause having minute differences is that the concentration of nitrate nitrogen is different, causes the response speed with modified Nano ferrum carbon composite
Differ, the degree of oxidation of modified Nano ferrum carbon composite is different, and then material structure change is different, causes water penetration to become
Change.
Fig. 7 is to be 40mg/L in contaminated liquid nitrate, and modified Nano ferrum carbon composite dosage is 1g, and flow velocity is
1mL/min, Nanoscale Iron and quality of activated carbon are than for 5:Under conditions of 2, different pH remove the impact of nitrate nitrogen to PRB, are going out sample
During 100min, in the nitrate-N pollution liquid for 5,7,9 for the pH, the clearance of nitrate nitrogen is respectively 91.4,81.3,33.0%, due to acid
The ironing surface oxide of nanometer can be dissolved, make Nanoscale Iron keep reducing activity[16], so acid condition is conducive to nitrate nitrogen
Remove.And the too high generation that not only can aggravate Nanoscale Iron secondary mineral of pH, reduce reducing activity[17], also can cause activity simultaneously
Carbon surface carboxyl and hydroxyl ion, reduce its absorbability, so the effect of PRB process nitrate nitrogen is poor under alkalescence condition.
The time-interval averaging value that the PRB device for 5,7,9 for record contaminated liquid pH starts sample from the outlet that brings into operation is respectively
72,75,76min, difference is inconspicuous.The possible cause still having minute differences is that pH affects the formation of nano-iron oxide, and then
Material structure change is different, causes water penetration to change.
Fig. 8 be modified Nano ferrum carbon composite dosage be 1g, contaminated liquid nitrate be 40mg/L, pH=7,
Nanoscale Iron and quality of activated carbon are than for 5:Under conditions of 2, different in flow rate removes the impact of nitrate nitrogen to PRB.Reduce with flow velocity,
PRB is gradually increased to the clearance of nitrate nitrogen.When going out sample 100min, nitrate nitrogen in the sample liquid for 0.5,1,2mL/min for the flow velocity
Clearance be respectively 96.7,81.3,44.2% it is seen then that flow velocity on PRB remove nitrate nitrogen affect larger, recording equipment simultaneously
The time interval initially going out sample from the outlet that brings into operation is respectively 143,75,30min, and pollution flow velocity is lower, in PRB
The time of staying is longer, and modified Nano ferrum carbon composite can be fully contacted reaction with nitrate nitrogen and then improve going of its nitrate nitrogen
Except rate.
Fig. 9 is to be 40mg/L in contaminated liquid nitrate, and flow velocity is 1mL/min, pH=7, Nanoscale Iron and active carbonaceous
Amount ratio is 5:Under conditions of 2, different packing materials remove the impact of nitrate nitrogen to PRB.Quartz sand is not inhaled to nitrate nitrogen substantially
Attached effect；Activated carbon has certain adsorption to nitrate nitrogen, but removal efficiency is gradually lowered after adsorption saturation, is going out sample
During 100min, the clearance of nitrate nitrogen is reduced to 8.74%, and now fills Nanoscale Iron and modified Nano ferrum carbon composite pair
The clearance of nitrate nitrogen respectively reaches 65.00,81.25%. and compares filling activated carbon in PRB, filling Nanoscale Iron and modified Nano
Ferrum carbon composite is higher to the removal of nitrate nitrogen, and the removal effect of filling-modified Nanoscale Iron carbon composite is best.Record
Filling activated carbon, quartz sand, Nanoscale Iron, the PRB device of modified Nano ferrum carbon composite is from the beginning of the outlet that brings into operation
The time-interval averaging value going out sample is respectively 70,78,93,75min.Analysis possible cause, Nanoscale Iron occurs to reunite simultaneously in PRB
Cause and to a certain degree block, reunite simultaneously and reduce Nanoscale Iron and the contact area of nitrate nitrogen, lead to nitrate nitrogen clearance to reduce.
Improved through the modified Nanoscale Iron reunion situation of rhamnolipid, then modified Nano ferrum is loaded on the activated carbon, further
Reduce and reunite.Activated carbon can not only adsorb nitrate nitrogen simultaneously, but also constitutes light electrolysis structure to a certain extent with Nanoscale Iron.Enter
And improve treatment effeciency.In addition modified Nano ferrum carbon composite fills the average time interval of PRB less than Nanoscale Iron, shows
PRB blockage problem is eased.
Figure 10 be contaminated liquid nitrate be 40mg/L, flow velocity be 1mL/min, pH=7, modified Nano ferrum charcoal be combined
Under conditions of material dosage is 1g, Nanoscale Iron and quality of activated carbon compare the impact that PRB removes nitrate nitrogen.When Nanoscale Iron and work
Property charcoal mass ratio be 5:When 2, go out flow liquid nitrate nitrogen Changing Pattern with filling Nanoscale Iron when rule similar, rise under the conditions of this is described
Main Function for Nanoscale Iron.And work as Nanoscale Iron and quality of activated carbon than for 1:1,1:When 2, when outlet just starts sample
Clearance is respectively 84.22,92.18%.With this understanding, activated carbon is except loading Nanoscale Iron, also larger absorbability
Absorption nitrate nitrogen.
Record Nanoscale Iron and quality of activated carbon ratio is for 1:0,5:2,1:1,1:In the case of 2, PRB device is from bringing into operation
The time-interval averaging value that outlet starts sample is respectively 93,75,62,60min.Activated carbon ratio is higher, starts sample
Time is shorter, illustrates that adding activated carbon can increase PRB water penetration, it is to avoid blocking.But find in preparation process, can bear
The amounts of activated carbon carrying Nanoscale Iron is limited, adds excessive activated carbon and can wash modified Nano ferrum carbon composite in washing or alcohol
Shi Zaocheng wastes, and excessively a high proportion of activated carbon can reduce the clearance to nitrate nitrogen simultaneously.Integrated comparative, when activated carbon particle size is
When 75 μm, Nanoscale Iron and quality of activated carbon are than for 5:The most suitable when 2.
From above experimental result, can be prevented effectively from as PRB filler using modified Nano ferrum carbon composite and adopt
With Nanoscale Iron cause PRB blocking and using activated carbon to nitrate nitrogen clearance low problem.When Nanoscale Iron and quality of activated carbon
Than for 5:When 2, PRB operational effect is optimal.PH value is less simultaneously, and contaminated liquid nitrate is lower, and water velocity is more little all to be had
Remove nitrate nitrogen beneficial to PRB.
Claims (5)
1. modified Nano ferrum carbon composite is it is characterised in that prepare gained by following methods：In three mouthfuls of burnings equipped with agitator
Volume ratio is added to be 1 in bottle:2 alcohol-water system 200mL, mixing speed is adjusted to 500rpm；Add rhamnolipid and dissolve, throw
Plus green vitriol, to be dissolved use feeder to add sodium borohydride solution with the speed of 2mL/min completely afterwards, continue stirring
10min, adds activated carbon and Nanoscale Iron, after continuing stirring 20min by the modified Nano preparing ferrum charcoal carry out multiple alcohol wash, water
Wash, and be finally saved in stand-by in dehydrated alcohol.
2. modified Nano ferrum carbon composite according to claim 1 is it is characterised in that described Nanoscale Iron adopts liquid phase
Prepared by reducing process, add volume ratio to be 1 in the there-necked flask equipped with agitator:2 alcohol-water system 200mL, mixing speed
It is adjusted to 500rpm；Add green vitriol, to be dissolved use feeder to add sodium borohydride with the speed of 2mL/min completely afterwards
Solution, continues stirring, whole process used time 30min and with nitrogen stripping deoxygenation；By the Nanoscale Iron preparing carry out multiple alcohol wash,
Washing, and finally it is saved in stand-by in dehydrated alcohol.
3. modified Nano ferrum carbon composite according to claim 1 is it is characterised in that described activated carbon is ature of coal
Charcoal, grinding in advance sieves makes its particle diameter be 75 μm, and deionized water is placed in vacuum drying oven after being cleaned multiple times, and dries at 110 DEG C
To constant weight.
4. modified Nano ferrum carbon composite according to claim 1 is it is characterised in that described Nanoscale Iron and activated carbon
Mass ratio is 5:2.
5. the application of the modified Nano ferrum carbon composite according to any one of claim 1 to 4 is it is characterised in that be used for
Filling permeable reactive barrier, removes nitrate nitrogen in subsoil water.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110076182A (en) * | 2018-01-26 | 2019-08-02 | 蔡永辉 | A kind of bicyclic synchronous circulating type is electronic-permeable reactive barrier soil remediation equipment |
| CN110624500A (en) * | 2019-07-02 | 2019-12-31 | 成都理工大学 | Preparation method of eupatorium adenophorum biochar and method for loading nano iron/nickel on eupatorium adenophorum biochar |
| CN115305094A (en) * | 2022-08-22 | 2022-11-08 | 四川省林业科学研究院 | Soil conditioner and preparation method thereof |
| CN115636464A (en) * | 2022-05-19 | 2023-01-24 | 成都理工大学 | Method for repairing underground water pollution by coupling circulating well with permeable reactive barrier |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105399199A (en) * | 2015-12-23 | 2016-03-16 | 成都理工大学 | Preparation method of biosurfactants-modified nano-iron/carbon composite material and application in removing nitrate nitrogen in underground water |
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2016
- 2016-09-27 CN CN201610854866.8A patent/CN106430514A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105399199A (en) * | 2015-12-23 | 2016-03-16 | 成都理工大学 | Preparation method of biosurfactants-modified nano-iron/carbon composite material and application in removing nitrate nitrogen in underground water |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110076182A (en) * | 2018-01-26 | 2019-08-02 | 蔡永辉 | A kind of bicyclic synchronous circulating type is electronic-permeable reactive barrier soil remediation equipment |
| CN110624500A (en) * | 2019-07-02 | 2019-12-31 | 成都理工大学 | Preparation method of eupatorium adenophorum biochar and method for loading nano iron/nickel on eupatorium adenophorum biochar |
| CN115636464A (en) * | 2022-05-19 | 2023-01-24 | 成都理工大学 | Method for repairing underground water pollution by coupling circulating well with permeable reactive barrier |
| CN115305094A (en) * | 2022-08-22 | 2022-11-08 | 四川省林业科学研究院 | Soil conditioner and preparation method thereof |
| CN115305094B (en) * | 2022-08-22 | 2024-02-06 | 四川省林业科学研究院 | Soil conditioner and preparation method thereof |
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