CN108423781A - A kind of preparation method and application of magnetic flocculant - Google Patents
A kind of preparation method and application of magnetic flocculant Download PDFInfo
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- CN108423781A CN108423781A CN201810236873.0A CN201810236873A CN108423781A CN 108423781 A CN108423781 A CN 108423781A CN 201810236873 A CN201810236873 A CN 201810236873A CN 108423781 A CN108423781 A CN 108423781A
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- powder
- magnetic
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- flocculant
- algae
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
Abstract
The invention discloses a kind of preparation method and applications of magnetic flocculant, are first 2 in mass ratio by attapulgite powder, vignite powder：0.5 1 carry out mixings, then mixed-powder is dipped in concentrated hydrochloric acid liquid 20 for 24 hours, finally spontaneously dry, crushed into powder obtains magnetic flocculant.The present invention can effectively in adsorption-flocculation algae water alga cells, to which algae flco is easily removed water body by way of externally-applied magnetic field, algal tufa Cells of Blue-green Algae and chlorophyll a removal rate are 95% or more, it is notable to the nitrogen in water body, phosphorus, COD and SS removal effects simultaneously, the harm that the accumulation zone of cyanobacterial bloom comes can not only be quickly removed, the frequency of breakout of water bloom can be more reduced.In addition, the magnetic flocculant is at low cost, there is larger application value and market potential.
Description
Technical field
The present invention relates to environment-friendly materials fields, and in particular to a kind of preparation method and application of magnetic flocculant.
Technical background
Lake is an important component part of mankind's socio-economic development, it both have abundant water, waterpower and
Aquatic resources, and with the Regulation Function of flood season flood control prevention waterlogging.But the high speed development and construction, speed due to society are remote
Far more than the processing capacity of social production and sanitary sewage qualified discharge, cause countries in the world face body eutrophication this
Great environmental problem.
And the outstanding problem that body eutrophication is brought is frequently breaking out for cyanobacterial bloom, is frequently broken out on a large scale
Cyanobacterial bloom reduces the utilization efficiency of water resource, causes serious ecological disruption and huge economic loss, and cyanophycean toxin
Generation to public health bring very big hidden danger again.It is nitrogen, the phosphorus in water body to cause the main nutrient elements of cyanobacterial bloom, especially
It is critical to be that phosphorus plays the role of.In eutrophication water, under the conditions of water mild climate appropriate, the fast-growth of cyanobacteria
Finally cause the generation of cyanobacterial bloom with outburst sexual reproduction.So how in time, to efficiently remove cyanobacteria be that cyanobacterial bloom is controlled
An important ring for reason.Currently, more commonly the method for removal cyanobacteria can substantially be summarized as Physical, chemical method and bioanalysis
Three categories.
Wherein Physical：Mainly there is mechanical salvaging, diversion, change the algae-removing methods such as water, filtering, absorption and aeration, in cyanobacteria
In terms of emergency processing, machinery is salvaged more common.Mechanical algae removement generally comprises fixed pumping algae, mobile pumping algae, flow-type and removes
Algae and the mechanical treatments measure such as manually surround and seize, salvage.Lake surface water is removed using mechanical means when cyanobacterial bloom largely occurs
China is simultaneously used, and can prevent malignant proliferation and secondary pollution.In addition, high pressure ionization, high-voltage pulse, alternating magnetic field, ultraviolet
These physical methods such as line and ultrasonic wave can also be converted to chemical energy using electric energy, change point into water body or water body substance
Minor structure and property reach killing, kill impurity in algae and decomposition, adsorbed water body, reaches water purification purpose.But this kind of physics
Method killing life entity is big, and consumption is more, killing is more, is used for a long time, cannot not only solve the problems, such as, also has destruction ecology
Suspicion.
Chemical method：Mainly the numerous of algae in water is controlled using by screening the chemical agent (be referred to as algicide) of synthesis
It grows, for example, the application of organic bromine algicide, mantoquita (copper sulphate, copper chloride), potassium permanganate etc..Mantoquita is the most aobvious except algae effect
It writes, but also there is danger, because mantoquita is except the copper compound or chelated copper class object that the chemical composition of algae machine is ease of solubility
Matter, these compounds generate a degree of injury to aquatic-organisms such as fish water plants and even result in death.Therefore, chemical agent
Except algae will operate in strict accordance with dosage, no it will cause serious consequences.
Bioanalysis：The methods of mainly inhibited at present using microbial control, algophagous prevention, water plant.It is wherein micro-
Biological control is mainly the characteristic using biosolubilization cyanobacteria, strictly speaking these microorganisms are the pathogen of cyanobacteria, including
Molten phycovirus, molten algae fungi and algae-lysing bacterium；Algophagous prevention is theoretical using bio operon, and it is suitable to be introduced in water body
Other biologies, such as fish, shellfish, they are directly or indirectly to eat to inhibit the undue growth of algae with algae；Aquatic plant
Object suppressing method can be described as allelopathy algal control method again, and in a plant population, plant or microorganism are by discharging chemicals
Matter promote or inhibit the phenomenon that it is other individual or it is self become allelopathy, water plant from nutrient competition, settled sludge and
The population of algae is influenced in terms of release inhibin three.Although bioanalysis is reached most using ecological principle, effect on environment
Smallization, still, this method have to the effective limitation of the prevention of cyanobacterial bloom in small range, fixed area, once coverage of water
Greatly, easy box haul occurs for cyanobacterial bloom and water flow variation is fluid, will produce little effect；And bioanalysis generally requires in advance
Huge artificial engineering is put into, to create and control the life for inhibiting microorganism, water plant or animal needed for cyanobacterial bloom
Deposit condition, thus slowly effect, of high cost, it is more difficult to be generally applicable to the improvement in big waters, sudden algal tufa.
In conclusion above-mentioned three kinds of methods, are even temporarily removed although playing alleviation to cyanobacterial bloom under certain condition
Effect, but they are there are still of high cost, inconvenient, or cause secondary pollution problems, become these methods and measure
Large-scale promotion and application.
Invention content
The present invention provides a kind of preparation method and applications of magnetic flocculant.
The technical scheme is that：
Attapulgite powder, vignite powder are first 2 in mass ratio by a kind of preparation method of magnetic flocculant：
0.5-1 carries out mixing, then mixed-powder is dipped in 20-24h in concentrated hydrochloric acid liquid, finally spontaneously dries, crushed into powder obtains magnetic
Property flocculant.
Further scheme, the grain size of the attapulgite powder be 200-300 mesh, vignite powder grain size be 800-
1000 mesh.
Further scheme, a concentration of of the concentrated hydrochloric acid liquid are not less than 9.7mol/L.
Further scheme, it is 2 that the mixed-powder, which is dipped in the mass ratio of mixed powder and concentrated hydrochloric acid liquid in concentrated hydrochloric acid liquid,：1.
Another hair goal of the invention of the present invention is to provide the application of the magnetic flocculant obtained through above-mentioned preparation method, described
Magnetic flocculant is put into algae water and is quickly stirred for administering cyanobacterial bloom by magnetic flocculant, when presentation great quantity of floc alumen ustum
Afterwards, it is that 3500-4000GS flcos magnetic separator removes cyanobacteria flco by applied field strengths.
Further scheme, the input amount of the magnetic flocculant are that the flocculation of 300-400mg magnetism is added in every 1 liter of algae water
Agent.
Wherein flco magnetic separator is existing product, is to utilize magnetic disk, disk made of rare-earth Nd-Fe-B material
A diameter of 1600mm；The separator is made of 40 disks, and gap 60-70mm is adjustable between disk.
The present invention administers blue algae water with vignite powder using acid is attapulgite modified as a kind of magnetic flocculant
China, wherein attapulgite are as basic material, alga cells that can effectively in adsorption-flocculation algae water, and vignite powder is made
For medium, cyanobacteria flco is removed water body by the method convenient for passing through externally-applied magnetic field, while to nitrogen, phosphorus, COD and the SS in water body
Removal effect is also very notable.
After administering cyanobacterial bloom with magnetic flocculant of the present invention, algal tufa Cells of Blue-green Algae and chlorophyll a removal rate reach
95% or more；It is notable to the nitrogen in water body, phosphorus, COD and SS removal effects simultaneously：The removal rate of total nitrogen is 50%-80%, algae
Total tp removal rate of water is that 95% or more, COD removal rates are gone up to 85%, SS removal rates close to 95%.Therefore, the magnetic wadding of the present invention
Solidifying agent can accomplish treating both manifestation and root cause of disease, can not only quickly remove cyanobacterial bloom, the harm for avoiding its accumulation zone from, moreover it is possible to pass through water body
The removal of nitrogen, the phosphorus nutrition factor reduces its frequency broken out.
Magnetic flocculant of the present invention be using low-cost attapulgite as raw material, it is at low cost, there is larger answer
With value and market potential, it is suitble to large-scale application；And attapulgite is natural nonpollution material, is added to water body, will not
Cause secondary pollution.In addition, because containing vignite powder in magnetic flocculant of the present invention, therefore there is stronger magnetic responsiveness,
The flco generated after processing removes water body by external magnetic field, and by magnetic drum seperator, reuse after separation has prevented secondary magnetite powder
Pollution.
Use grain size for the attapulgite powder of 200-300 mesh (48 μm -75 μm) in the present invention, the purpose is to the grain size is recessed
The specific surface area of convex stick soil both ensure that the suction acid amount of rather moderate, in turn ensure the adsorptivity of modified attapulgite；Using
Grain size is the vignite powder of 800-1000 mesh (13 μm -18 μm), and the purpose is to the grain size magnetite powders both ensure that abundance
Magnetic strength, in turn ensure to be easy during flocculated to be wrapped and be used as flco magnetism core, simultaneously as magnetite powder
Than great (5.18g/cm3), the Armco magnetic iron miberal powder of the grain size ensure that flco before complete development not as flco magnetism core
As for the bottom is deposited to, also ensures and be in suspended state when flco passes through magnetic separator.
Specific implementation mode
Embodiment 1：
It is first 200 mesh attapulgite powders by grain size and grain size be 800 mesh vignite powder is 2 in mass ratio：1 carries out
Mixing, then by mixed-powder according to mass ratio be 2：1 is dipped in 20h in a concentration of 9.7mol/L concentrated hydrochloric acids liquid, finally spontaneously dry,
Crushed into powder obtains magnetic flocculant.
2016-2017 during Chaohu Lake is salvaged, by the magnetic flocculant of above-mentioned preparation according to 300mg/L
Amount be added to a concentration of 1 × 106In the algal tufa water body of cell/L, quickly stir, after great quantity of floc alumen ustum is presented, by outer
It is that 3500GS flcos magnetic separator removes cyanobacteria flco to add magnetic field intensity.Outlet effect obviously takes a turn for the better, and table is detected through third party
Bright algae density, chlorophyll a, total phosphorus, COD, SS removal rate respectively reach 99.94%, 99.98%, 97.5%, 83.33%,
91.27% (specific processing data see the table below 1), shows the magnetic flocculant in the emergent advantage salvaged in applying of cyanobacteria and practicality
Property.
1 magnetic flocculant of table is applied to the emergent Inlet and outlet water tables of data salvaged of cyanobacteria
Embodiment 2：
It is first 300 mesh attapulgite powders by grain size and grain size be 1000 mesh vignite powder is 2 in mass ratio：0.5
Carry out mixing, then by mixed-powder according to mass ratio be 2：1 is dipped in a concentration of 10mol/L concentrated hydrochloric acids liquid for 24 hours, finally naturally dry
Dry, crushed into powder obtains magnetic flocculant.
2016-2017 during Chaohu Lake is salvaged, by the magnetic flocculant of above-mentioned preparation according to 400mg/L
Amount be added to a concentration of 1 × 109In the algal tufa water body of cell/L, quickly stir, after great quantity of floc alumen ustum is presented, by outer
It is that 4000GS flcos magnetic separator removes cyanobacteria flco to add magnetic field intensity.Outlet effect obviously takes a turn for the better, and table is detected through third party
Bright algae density, chlorophyll a, total phosphorus, COD, SS removal rate respectively reach 99.90%, 96.91%, 98.39%, 98.07%,
99.26% (specific processing data see the table below 2), shows the magnetic flocculant in the emergent advantage salvaged in applying of cyanobacteria and practicality
Property.
2 magnetic flocculant of table is applied to the emergent Inlet and outlet water tables of data salvaged of cyanobacteria
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (6)
1. a kind of preparation method of magnetic flocculant, it is characterised in that：Attapulgite powder, vignite powder are first pressed into quality
Than being 2：0.5-1 carries out mixing, then mixed-powder is dipped in 20-24h in concentrated hydrochloric acid liquid, finally spontaneously dries, crushed into powder
Obtain magnetic flocculant.
2. preparation method according to claim 1, it is characterised in that：The grain size of the attapulgite powder is 200-300
Mesh, vignite powder grain size be 800-1000 mesh.
3. preparation method according to claim 1, it is characterised in that：Described a concentration of of concentrated hydrochloric acid liquid is not less than
9.7mol/L。
4. preparation method according to claim 1, it is characterised in that：The mixed-powder is dipped in mixed powder in concentrated hydrochloric acid liquid
Mass ratio with concentrated hydrochloric acid liquid is 2：1.
5. the application for the magnetic flocculant that preparation method as described in claim 1 obtains, it is characterised in that：The magnetic flocculation
Magnetic flocculant is put into algae water and is quickly stirred, after great quantity of floc alumen ustum is presented, by outer for administering cyanobacterial bloom by agent
It is that 3500-4000GS flcos magnetic separator removes cyanobacteria flco to add magnetic field intensity.
6. application according to claim 5, it is characterised in that：The input amount of the magnetic flocculant is in every 1 liter of algae water
300-400mg magnetic flocculants are added.
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Cited By (5)
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| CN110075788A (en) * | 2019-05-23 | 2019-08-02 | 陕西科技大学 | A kind of cyanobacteria magnetic based on the modified preparation of sepiolite catches the preparation method of agent |
| CN110075789A (en) * | 2019-05-23 | 2019-08-02 | 陕西科技大学 | A kind of cyanobacteria magnetic based on the modified preparation of attapulgite catches the preparation method of agent |
| CN110104744A (en) * | 2019-03-28 | 2019-08-09 | 天津科技大学 | It is a kind of to utilize the magnetic flocculant and application and application method that steel mill's human society is material |
| CN110642448A (en) * | 2019-09-26 | 2020-01-03 | 浙江海洋大学 | Purification method for recycling aquaculture wastewater |
| CN115417564A (en) * | 2022-10-09 | 2022-12-02 | 安徽久吾天虹环保科技有限公司 | Water bloom polluted water body remediation method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110104744A (en) * | 2019-03-28 | 2019-08-09 | 天津科技大学 | It is a kind of to utilize the magnetic flocculant and application and application method that steel mill's human society is material |
| CN110104744B (en) * | 2019-03-28 | 2022-02-11 | 天津科技大学 | Magnetic flocculant using steel mill red dust as material and application and use method thereof |
| CN110075788A (en) * | 2019-05-23 | 2019-08-02 | 陕西科技大学 | A kind of cyanobacteria magnetic based on the modified preparation of sepiolite catches the preparation method of agent |
| CN110075789A (en) * | 2019-05-23 | 2019-08-02 | 陕西科技大学 | A kind of cyanobacteria magnetic based on the modified preparation of attapulgite catches the preparation method of agent |
| CN110642448A (en) * | 2019-09-26 | 2020-01-03 | 浙江海洋大学 | Purification method for recycling aquaculture wastewater |
| CN110642448B (en) * | 2019-09-26 | 2022-03-18 | 浙江海洋大学 | Purification method for recycling aquaculture wastewater |
| CN115417564A (en) * | 2022-10-09 | 2022-12-02 | 安徽久吾天虹环保科技有限公司 | Water bloom polluted water body remediation method |
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Application publication date: 20180821 |