CN107151678A - The magnetic iron and manganese oxides of aerobic microbiological synthesis and its application - Google Patents
The magnetic iron and manganese oxides of aerobic microbiological synthesis and its application Download PDFInfo
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- CN107151678A CN107151678A CN201710338764.5A CN201710338764A CN107151678A CN 107151678 A CN107151678 A CN 107151678A CN 201710338764 A CN201710338764 A CN 201710338764A CN 107151678 A CN107151678 A CN 107151678A
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P3/00—Preparation of elements or inorganic compounds except carbon dioxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28009—Magnetic properties
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
Abstract
The present invention provides magnetic iron and manganese oxides and its application of a kind of aerobic microbiological synthesis, and the magnetic iron and manganese oxides of the aerobic microbiological synthesis are synthesized using following steps：Step 1: under aerobic condition, iron ion partial reduction is ferrous ion formation magnetic Fe while divalent manganesetion is oxidized into Mn oxide by manganese oxidizing bacteria and iron-reducing bacterium synergy in microbiologic population3O4；Step 2: the material that step one is obtained is centrifuged, solid precipitation is collected, solid precipitation vacuum drying grinding is obtained into magnetic iron and manganese oxides.Magnetic iron and manganese oxides of the present invention are prepared from using pure natural microbial process at normal temperatures and pressures, have preferable adsorption effect to various heavy.
Description
Technical field
The present invention relates to environment nanometer technology, more particularly to a kind of synthesis of aerobic microbiological magnetic iron and manganese oxides and its
Using.
Background technology
Heavy metal, such as lead ion, mercury ion, arsenic ion, cadmium ion, nickel ion are widely present in plating, metallurgical and process hides
In the waste water of industry.Different from organic pollution, heavy metal cannot be degraded by physics, chemistry or biological process,
But it can enter in animals and plants and human body by biological concentration, the effect such as biological accumulation and biomagnification, human health is made
Into very big harm.Therefore, it is necessary to carry out effective processing to it before heavy metal wastewater thereby is discharged into environment.
For the harm of heavy metal wastewater thereby, domestic and international researcher have developed a variety of methods and effective processing carried out to it,
Common processing method includes chemical precipitation, ion exchange, absorption method and electrochemistry removal etc..In these methods, absorption method with
Its is cheap, adsorbent wide material sources, the advantages of design operation is simple, has obtained wide in the processing of actual heavy metal wastewater thereby
General application.However, heavy-metal adsorption material widely used at present, such as Powdered Activated Carbon is limited to specific surface area, stability
And adsorption capacity, application and treatment effect are often unsatisfactory in the processing of actual heavy metal wastewater thereby.
In the heavy metal absorbent of numerous kinds, nano-metal-oxide is the adsorbent of a class more novelty.It leads to
Often there is larger specific surface area, good adsorptive selectivity and larger adsorption capacity, the wide of researcher is obtained in recent years
General concern.Mn oxide (MnOx, X=1~2) be widely present in natural water body environment, to many kinds of metal ions, such as lead from
Son, copper ion, cadmium ion and cobalt ions etc. have stronger affinity, and effectively above-mentioned metal ion can be adsorbed.
Wherein, lead ion can form stable chemical interaction with Mn oxide, greatly increase its removal amount.Such as δ-MnO2It is right
The adsorbance of lead ion is up to 0.31mol/mol.And the biological manganese oxygen of manganese oxide minerals Acremonium sp.KR21-2 synthesis
Compound is to zinc ion, and mole adsorbance of nickel ion and cobalt ions is respectively up to 0.23,0.12 and 0.20mol/mol.Meanwhile, receive
Rice Mn oxide has very strong oxidation susceptibility, its toxicity can be made to drop significantly the arsenic ion that trivalent arsenic ionic oxide formation is pentavalent
It is low.However, nano manganese oxide is in processing actual waste water, the problem of recycling is one complex.
There is researcher to attempt to utilize magnetic Nano material, such as Fe3O4Carry out the processing of heavy metal wastewater thereby.This kind of material can be with
Easily reclaimed using magnetic field from waste water, and with preferable absorption property.But single magnetic Nano material
When applying, easily occurs self aggregation so as to absorption property when influenceing it to recycle.Zhao et al. utilizes hydro-thermal method
It is prepared for Fe3O4-MnO2Composite nano adsorbent, to a variety of bivalent metal ions, such as lead ion, copper ion, cadmium ion, zinc from
Son and nickel ion show preferable absorption property.But hydro-thermal method usually requires also to need in higher temperature, building-up process
Certain surfactant and strong oxidizer is added, therefore cost is higher in actual applications.
The content of the invention
It is an object of the present invention in view of the above-mentioned problems, propose a kind of magnetic iron and manganese oxides of aerobic microbiological synthesis,
The magnetic iron and manganese oxides at normal temperatures and pressures, are prepared from using pure natural microbial process, had to various heavy
Preferable adsorption effect.
To achieve the above object, the technical solution adopted by the present invention is：A kind of magnetic ferrimanganic oxygen of aerobic microbiological synthesis
Compound, is synthesized using following steps：
Step 1: aerobic condition under (oxygen in water concentration is more than 0.5ppm), manganese oxidizing bacteria in microbiologic population and
(abundance ratio is 1 to iron-reducing bacterium:5 to 5:1) act synergistically, while divalent manganesetion is oxidized into Mn oxide, by iron from
Subdivision is reduced to ferrous ion formation magnetic Fe3O4；
Step 2: solid precipitation (thalline and nano material mixture) is collected by centrifugation in the material that step one is obtained, will be solid
Body precipitation vacuum drying grinding obtains magnetic iron and manganese oxides, also referred to as magnetic Nano biological adsorption agent.
Further, under the aerobic condition, in microbiologic population manganese oxidizing bacteria and iron-reducing bacterium synergy include with
Lower step：The microbiologic population constituted using the aerobic manganese oxidizing bacteria of fluid nutrient medium culture and iron-reducing bacterium is good at 25-40 DEG C
Oxygen culture 7-14 days.
Further, described Liquid Culture based component includes the following each component of weight proportion：Peptone 2g/L, yeast
Powder 0.5g/L, NaCl 13.14g/L, KCl 0.56g/L, MgSO4·7H2O 7.24g/L, anhydrous CaCl20.83g/L, HEPES
(pH7.0) cushioning liquid 20mM, trace element：CuSO4·5H2O 10mg/L, ZnSO4·7H2O 44mg/L, CoCl2·6H2O
20mg/L, Na2MoO4·2H2O 13mg/L。
Further, step 2 comprises the following steps：After the material centrifugation that step one is obtained, abandoning supernatant, collect
Solid precipitates (thalline and nano material mixture), is precipitated 2~3 times with distillation water washing solid, then precipitates solid and place
In in vacuum drying chamber, solid precipitation vacuum drying grinding is finally obtained magnetic iron and manganese oxides by 80 degree of dry 8-12h.
Further, the particle diameter of the magnetic iron and manganese oxides is 50-200nm.
Further, the manganese oxidizing bacteria and iron-reducing bacterium abundance ratio are 1:5 to 5:1.
Another object of the present invention, additionally provides a kind of magnetic iron and manganese oxides of aerobic microbiological synthesis at waste water
Purposes in reason, first fully contacts magnetic iron and manganese oxides with the waste water containing heavy metal ion, the magnetic ferrimanganic oxygen
Input amount of the compound in waste water is 0.1-0.5g/L, preferably 0.2g/L；Then heavy metal ion will be adsorbed with using magnet
Magnetic iron and manganese oxides (nano adsorber) separated with waste water.
Further, the heavy metal ion includes the one or several kinds in nickel, cobalt, copper, zinc, cadmium, lead, manganese and arsenic.
Further, magnetic iron and manganese oxides are fully contacted with the waste water containing heavy metal ion first, the waste water
Temperature is 30~60 DEG C, pH 4~6, and concentration of heavy metal ion is 25~150mg/L, puts into 0.1-0.5g/L magnetic ferrimanganic oxygen
Compound (nano biological adsorbent), after being well mixed, vibrates 1-6h, takes out mixed liquor, then will be adsorbed with a huge sum of money using magnet
The magnetic iron and manganese oxides (nano adsorber) of category ion are separated with waste water.
Further, after magnetic iron and manganese oxides (nano biological adsorbent) the Adsorption of Heavy Metals ion, dilute salt is utilized
Sour cyclic washing is adsorbed with the magnetic iron and manganese oxides of heavy metal ion, magnetic iron and manganese oxides is desorbed heavy metal ion, with
Just reuse.
In nature, a variety of aerobic iron-manganese oxidizing microorganisms are there are, such as Bacillus cereus SP1 can have
Can be ferric ion by ferrous ions under conditions of oxygen.Meanwhile, in the presence of manganese ion, by manganese ion oxygen
Turn to the nano manganese oxide of not solvent.These Fe-Mn oxidation microorganisms are widely used in the high suction that synthesis has ferriferous oxide concurrently
(main component is FeOOH and MnO to the ferro manganese composite oxides of attached amount and the strong oxidizing property of Mn oxide2).The ferrimanganic obtained
Composite oxides show the efficient absorption (1.77mmol/g) and oxidation susceptibility to trivalent arsenic ion, than simple MnO2's
Adsorbance is high 6 times.However, the iron and manganese oxides obtained in the case of aerobic are generally and without magnetic.Typically, it can synthesize
The bacterium of magnetic iron oxide, is required under strictly anaerobic condition or extremely low oxygen concentration, is only possible to ferrous ion part oxygen
Metaplasia is into magnetic nanoparticle.So strict condition of culture, it is clear that be unfavorable for being prepared on a large scale the magnetic Nano of biological source
Adsorbent.
The present invention can prepare magnetic iron and manganese oxides, Armco magnetic iron using pure natural microbial process at normal temperatures and pressures
Mn oxide has preferable adsorption effect to various heavy.The magnetic iron and manganese oxides of aerobic microbiological synthesis of the present invention
Preparation method is simple, easy, and it is widely used, easily applied, compared with prior art with advantages below：The purpose of the present invention exists
In
The present invention is using microorganism in aerobic condition next step synthesizing magnetic iron and manganese oxides nano material, the material environment
Green friendly and easily recovery.Heavy metal ions in wastewater absorption is used it for, contents of many kinds of heavy metal ion can be shown excellent
Absorption property, be with a wide range of applications in the processing of heavy metal wastewater thereby.
Brief description of the drawings
Fig. 1 is magnetic iron and manganese oxides by the photo of magnet adsorption.
Fig. 2 is absorption property of the Armco magnetic iron manganese oxide nanoparticles to different metal ions, wherein per metal ion species
Concentration is 200mg/L, pH=5.0.
Fig. 3 is adsorbance of the magnetic iron and manganese oxides under different pH to lead ion, wherein plumbum ion concentration 50mg/L.
Fig. 4 is adsorbance of the magnetic iron and manganese oxides to different initial concentration lead ions.
Fig. 5 is selective absorption of the magnetic iron and manganese oxides to lead ion.
Fig. 6 is the topography scan electron microscope of magnetic iron and manganese oxides, and multiplication factor is 50000 times.
Embodiment
The present invention is further described with reference to embodiments：
Embodiment 1
Method present embodiment discloses a kind of under aerobic condition by Microbe synthesis magnetic iron and manganese oxides, and its
Application in heavy metal adsorption.
A kind of synthesis condition of the magnetic iron and manganese oxides of aerobic microbiological synthesis is as follows：Aerobic microbiological group derives from
Liaoning Province Liaodong Wan coastal waters bed mud, is cultivated using fluid nutrient medium (K fluid nutrient mediums), while adding 2mM MnCl2With
0.1mM FeCl3.After bed mud culture 14 days, transferred using the bacterium solution of 10% volume as kind of liquid, repeat 10 and take turns, obtain steady
Fixed aerobic microbiological group A1 (hereinafter referred to as A1).A1 is transferred to the fluid nutrient medium after sterilizing with 10% inoculum concentration
In, add 2mM MnCl2With 0.1mM FeCl3, cultivate 7 days, the nano material of thalline and generation is collected by centrifugation in 5000rpm.Obtain
Mixture profit be washed with deionized after 3 times, 80 degree of dry 6h in vacuum drying chamber.After the powder mull obtained
Used as heavy metal absorbent.Magnetic iron and manganese oxides are as shown in Figure 1 by the photo of magnet adsorption.
The Liquid Culture based component includes the following each component of weight proportion：Peptone 2g/L, dusty yeast 0.5g/L,
NaCl 13.14g/L, KCl 0.56g/L, MgSO4·7H2O 7.24g/L, anhydrous CaCl20.83g/L, HEPES (pH7.0) delay
Solution 20mM is rushed, trace element：CuSO4·5H2O 10mg/L, ZnSO4·7H2O 44mg/L, CoCl2·6H2O 20mg/L,
Na2MoO4·2H2O 13mg/L。
The Fe-Mn oxidation microbiologic population for taming acquisition is inoculated into fluid nutrient medium by the present embodiment under aerobic condition
In, while adding a certain proportion of divalent manganesetion and ferric ion, product is collected by centrifugation after culture several weeks and is dried in vacuo,
Obtain the magnetic iron and manganese oxides of tool.The iron and manganese oxides (adsorbent) of the magnetic are mixed with certain density heavy metal wastewater thereby
Afterwards, simply adsorbent can be separated using magnetic field.
Herein unless otherwise specified, unit mM=mmol/L.
Absorption property is detected：Heavy metal adsorption experiment in, first by the solution ph containing heavy metal ion adjust to
Proper range, then, adds the heavy metal ion of different initial concentrations, makes its final concentration between 25-150mg/L, then, plus
Enter 5-10mg magnetic Nano iron and manganese oxides, be positioned over progress vibration adsorption experiment in shaking table, adsorption time is 3-6h.With
Afterwards, the measure of heavy metal ion adsorbed amount is carried out using atomic fluorescence or atomic absorption spectrophotometer, adsorption efficiency is determined.Inhale
After the completion of attached, the recycling of adsorbent is carried out using magnet.The adsorbent of recovery is cleaned using watery hydrochloric acid, scrubbed de-
It is attached reusable.The heavy metal includes nickel, cobalt, copper, zinc, cadmium, lead, manganese, in arsenic any one or it is several.
Absorbency Test of the magnetic iron and manganese oxides to different metal ions.
Respectively in 20mL deionized water, 200mg/L plumbi nitras, cadmium nitrate, nickel nitrate, zinc nitrate are added, and adjust
It is 5.0 to save pH value of solution.Then, 4mg magnetic iron and manganese oxides are added in each system, ultrasonic 20s makes it be uniformly dispersed.With
Afterwards, it is positioned in shaking table, 6h is vibrated under 30 degrees Celsius with 150rpm speed.Then, supernatant is crossed into 0.45 μm of filter membrane, filtered
Liquid determines correspondence content of beary metal using atomic absorption spectrophotometer.As a result as shown in Fig. 2 magnetic iron and manganese oxides are to lead,
Cadmium, nickel and zinc ion are respectively provided with preferable adsorption effect, and adsorbance is respectively up to 280mg/g, 110mg/g, 32mg/g and
60mg/g。
Adsorption experiment of the magnetic iron and manganese oxides under different pH to lead ion.
HCl or NaOH is utilized respectively the pH of deionized water is adjusted into 4,5,6 and ensures that absorption system cumulative volume is 20mL.
In each system add 4mg magnetic iron and manganese oxides, with adsorptivity of the magnetic iron and manganese oxides to different metal ions
It can test and carry out adsorption reaction under the same conditions.The adsorption effect of gained is as shown in Figure 3.It can be seen that Armco magnetic iron
Mn oxide can adsorb complete 50mg/L lead ion in the range of pH is 4-6, i.e., adsorbance is up to 250mg/g.
When pH is 5 and 6, the rate of adsorption to lead ion will be faster than adsorption rate when pH is 4.
Adsorption experiment of the magnetic iron and manganese oxides to the lead ion of different initial concentrations.
Respectively in 20mL deionized water, the nitric acid that initial concentration is respectively 25,50,75,100 and 120mg/L is added
Lead, and it is 5.0 to adjust starting pH.Then, add 4mg magnetic iron and manganese oxides, from magnetic iron and manganese oxides to different gold
The Absorbency Test of category ion carries out adsorption experiment under the same conditions, as a result as shown in Figure 4.It is respectively in initial concentration
When 25,50,75,100,120,200mg/L, adsorbance is up to 115,205,220,280,245,255mg/g.
Selective absorption of the magnetic iron and manganese oxides to lead ion is tested.
200mg/L lead ion is added in 20mL deionized water respectively, cadmium ion, zinc ion, nickel ion reacts bar
Part and condition determination are with Absorbency Test of the magnetic iron and manganese oxides to different metal ions.Then in 20mL deionized water
In be separately added into 200mg/L lead ion and zinc ion, lead ion and nickel ion, lead ion and cadmium ion, research adsorbent exists
When two metal ion species coexist, to the absorption property of two kinds of metals, while adding 200mg/L simultaneously in 20mL deionized water
Lead ion, zinc ion, nickel ion and cadmium ion, to study adsorbent when different kinds of ions coexists, to different metal ions
Absorption property.Reaction condition is identical to the Absorbency Test of different metal ions with magnetic iron and manganese oxides, utilizes Armco magnetic iron
Mn oxide determines the concentration of metal ion in filtrate to the method in the Absorbency Test of different metal ions.As a result as schemed
Shown in 5.When lead ion and zinc ion, nickel ion, when cadmium ion coexists, the adsorbance on lead ion does not influence substantially.Lead from
Son adsorbance from individualism when 281.55mg/g be changed into 279.06mg/g, 257.38mg/g and 215.55mg/g.And
When three metal ion species coexist with lead ion simultaneously, the adsorbance of lead ion drops to 133.8mg/g or so.Fig. 6 is magnetic
The topography scan electron microscope (multiplication factor is 50000 times) of iron and manganese oxides, can be observed microbial cells and irregular pattern
Nano material coexist.
Embodiment 2
The present embodiment provides another typical synthesis condition of magnetic iron and manganese oxides：
Aerobic microbiological group derives from Liaoning Province Liaodong Wan coastal waters bed mud, utilizes fluid nutrient medium (K fluid nutrient mediums)
Cultivated, while adding 2mM MnCl2With 0.5mM FeCl3.After bed mud culture 21 days, kind is used as using the bacterium solution of 5% volume
Liquid is transferred, and is repeated 10 and is taken turns, obtains stable aerobic microbiological group A2 (hereinafter referred to as A2).By A2 with 5% inoculation
Amount is transferred in the fluid nutrient medium after sterilizing, adds 2mM MnCl2With 0.5mM FeCl3, cultivate 14 days, 8000rpm centrifugations are received
Collect the nano material of thalline and generation.The mixture profit of acquisition is washed with deionized after 3 times, is done for 80 degree in vacuum drying chamber
Dry 6h.Heavy metal absorbent is can be used as after the powder mull obtained to use.
The Liquid Culture based component includes the following each component of weight proportion：Peptone 2g/L, dusty yeast 0.5g/L,
NaCl 13.14g/L, KCl 0.56g/L, MgSO4.7H2O 7.24g/L, anhydrous CaCl20.83g/L, HEPES (pH 7.0) delay
Solution 20mM is rushed, trace element：CuSO4.5H2O 10mg/L, ZnSO4.7H2O 44mg/L, CoCl2.6H2O 20mg/L,
Na2MoO4.2H2O 13mg/L。
Adsorption experiment of the present embodiment magnetic Nano iron and manganese oxides under different pH to copper ion.
100mg/L copper ion is added in deionized water system, HCl or NaOH is utilized respectively and adjusts the pH of reaction system
Save as 5.5,6,6.5,7.0 and ensure that absorption system cumulative volume is 100mL.50mg magnetic ferrimanganic oxygen is added in each system
Compound, is positioned in shaking table and is vibrated, and carries out the measure of adsorbance after 2h using atomic absorption spectrophotometer.Adsorption curve
The result of measure shows that copper ion is not adsorbed substantially when pH is 5.5.And when reaction system pH is 6,6.5,7.0, institute
Some copper ions can be adsorbed completely in 30min.I.e. magnetic Nano iron and manganese oxides in the pH of reaction system between 6-7
When, the adsorbance to copper ion is more than 200mg/g.
Adsorption experiment of the present embodiment magnetic iron and manganese oxides to the copper ion of different initial concentrations.
Respectively in 100mL deionized water, the copper ion that initial concentration is respectively 40,80,100 and 150mg/L is added,
And it is 6.0 to adjust starting pH.Then, add 50mg magnetic iron and manganese oxides, from magnetic iron and manganese oxides under different pH
Adsorption experiment is carried out under the same conditions to the adsorption experiment of copper ion.It is respectively 40,80,100 and 150mg/L in initial concentration
When, adsorbance is up to 60,135,198 and 223mg/g.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (9)
1. a kind of magnetic iron and manganese oxides of aerobic microbiological synthesis, it is characterised in that using following steps synthesis：
Step 1: under aerobic condition, manganese oxidizing bacteria and iron-reducing bacterium synergy in microbiologic population, by divalent manganesetion
It is ferrous ion formation magnetic Fe by iron ion partial reduction while being oxidized to Mn oxide3O4；
Step 2: the material that step one is obtained is centrifuged, solid precipitation is collected, solid precipitation vacuum drying grinding is obtained into magnetic
Iron and manganese oxides.
2. the magnetic iron and manganese oxides that aerobic microbiological is synthesized according to claim 1, it is characterised in that the aerobic condition
Under, manganese oxidizing bacteria and iron-reducing bacterium synergy comprise the following steps in microbiologic population：It is aerobic using fluid nutrient medium culture
The microbiologic population of manganese oxidizing bacteria and iron-reducing bacterium composition, aerobic culture 7-14 days at 25-40 DEG C.
3. the magnetic iron and manganese oxides that aerobic microbiological is synthesized according to claim 2, it is characterised in that described liquid training
Supporting based component includes the following each component of weight proportion：Peptone 2g/L, dusty yeast 0.5g/L, NaCl 13.14g/L, KCl
0.56g/L, MgSO4·7H2O 7.24g/L, anhydrous CaCl20.83g/L, pH7.0 HEPES cushioning liquid 20mM, micro member
Element：CuSO4·5H2O 10mg/L, ZnSO4·7H2O 44mg/L, CoCl2·6H2O 20mg/L, Na2MoO4·2H2O 13mg/
L。
4. according to claim 1 aerobic microbiological synthesis magnetic iron and manganese oxides, it is characterised in that step 2 include with
Lower step：After the material centrifugation that step one is obtained, abandoning supernatant, solid precipitation is collected, with distillation water washing solid precipitation 2
~3 times, then solid precipitation is positioned in vacuum drying chamber, 80 degree of dry 8-12h, finally ground solid precipitation vacuum drying
Mill obtains magnetic iron and manganese oxides.
5. the magnetic iron and manganese oxides that the aerobic microbiological according to claim 1-4 any one is synthesized, it is characterised in that institute
The particle diameter for stating magnetic iron and manganese oxides is 50-200nm.
6. the magnetic iron and manganese oxides that aerobic microbiological described in a kind of claim 1-5 any one is synthesized are in the treatment of waste water
Purposes, it is characterised in that first fully contact magnetic iron and manganese oxides with the waste water containing heavy metal ion, the Armco magnetic iron
Input amount of the Mn oxide in waste water is 0.1-0.5g/L；Then the magnetic ferrimanganic of heavy metal ion will be adsorbed with using magnet
Oxide is separated with waste water.
7. purposes according to claim 6, it is characterised in that the heavy metal ion includes nickel, cobalt, copper, zinc, cadmium, lead, manganese
With the one or several kinds in arsenic.
8. purposes according to claim 6, it is characterised in that first by magnetic iron and manganese oxides and contain heavy metal ion
Waste water is fully contacted, and the wastewater temperature is 30~60 DEG C, pH 4~6, and concentration of heavy metal ion is 25~150mg/L, input
0.1-0.5g/L magnetic iron and manganese oxides, after being well mixed, vibrate 1-6h, take out mixed liquor, then will be adsorbed using magnet
The magnetic iron and manganese oxides for having heavy metal ion are separated with waste water.
9. purposes according to claim 6, it is characterised in that after the magnetic iron and manganese oxides Adsorption of Heavy Metals ion, profit
The magnetic iron and manganese oxides of heavy metal ion are adsorbed with watery hydrochloric acid cyclic washing, make magnetic iron and manganese oxides be desorbed heavy metal from
Son.
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| CN109811011A (en) * | 2019-01-31 | 2019-05-28 | 内蒙古科技大学 | A kind of method of the hollow micro-nano ferroso-ferric oxide of biosynthesis |
| CN111482161A (en) * | 2020-04-17 | 2020-08-04 | 青岛理工大学 | Magnetic biological manganese oxide adsorption material and preparation and application thereof |
| CN113735228A (en) * | 2021-09-29 | 2021-12-03 | 南京工业大学 | Preparation method of electrode made of biological iron-manganese oxide, electrode and application |
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| CN111482161B (en) * | 2020-04-17 | 2021-04-16 | 青岛理工大学 | Magnetic biological manganese oxide adsorption material and preparation and application thereof |
| CN113735228A (en) * | 2021-09-29 | 2021-12-03 | 南京工业大学 | Preparation method of electrode made of biological iron-manganese oxide, electrode and application |
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