CN104667633B - Filter medium for removing cadmium in drinking water, filter element and preparation method of filter medium - Google Patents
Filter medium for removing cadmium in drinking water, filter element and preparation method of filter medium Download PDFInfo
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Abstract
The invention provides a preparation method of a filter medium for removing cadmium in drinking water. The preparation method comprises the following steps: (a) mixing ultrahigh-macromolecule polyethylene powder, active carbon powder, zeolite powder, apatite powder and a pore forming agent to obtain a mixture, wherein the weight ratio of the ultrahigh-macromolecule polyethylene powder to the active carbon powder to the zeolite powder to the apatite powder to the pore forming agent is (200-300) to (50-100) to (100-200) to (50-100) to (50-100); and (b) pressing, sintering and cooling the mixture prepared in the step (a) in a mold in sequence, wherein the pressing pressure is 0.4MPa to 1MPa, the sintering temperature is 200 to 300 DEG C, the sintering time is 90 to 120min, and the cooling temperature is 40 to 60 DEG C. Under the synergistic effect of the raw materials, the prepared filter medium is high in removal rate on the cadmium in the water and the method is simple.
Description
Technical field
The present invention relates to a kind of remove filter medium of cadmium and preparation method thereof in drinking water, it is situated between by this filtration
The filter element of quality structure one-tenth, water purifying plant and drinking Fountains.
Background technology
Cadmium is a kind of metal with silvery white or bit bluish gloss at normal temperatures, is ductility and corrosion resistant
The good rare metal of corrosion.Cadmium is very strong to the anti-corrosion capability of biomass and alkaline matter, is frequently used for
The plating of the metals such as steel, ferrum, copper；Cadmium can be additionally used in manufacturing Ni-Cr battery；Its compound is used in a large number
Produce fluorescent material and pigment；It is widely used in smelting, process hides, printing and dyeing and Chemical Manufacture.
A kind of more universal pollutant in Ge Shi China water body, the toxicity of cadmium wastewater is very big, the chemical combination of cadmium
Thing toxicity is bigger, is easily enriched with vivo, makes urinary system impaired, causes chronic poisoning；China
In integrated wastewater discharge standard, clear stipulaties cadmium is the first pollutant, and highest permission concentration of emission is
0.1mg/L is processed it is not possible to do dilution., in human body based on the dissolved, it can be with multiple aniones for cadmium
Form aqua complex.In recent years, there are a series of cadmium pollution events successively in the ground such as China Hunan, Guangdong,
Bring threat to the living safety of the common people.
In the face of above-mentioned pollution, traditional water treatment technology bad to the treatment effect of cadmium it is impossible to effectively go
Except cadmium；Ion-exchange process is loaded down with trivial details, and the flushing water after displacement saturation is difficult to process；Hyperfiltration is using fiber crops
Tired, water wasting expense electricity, high cost, the concentrated solution of discharge is not disposable, easily causes secondary pollution；And precipitate
Method equally occurs the problem processing hardly possible.
Content of the invention
In view of this, present invention solves the technical problem that being to provide a kind of filter medium and preparation method thereof,
This filter medium is high to the clearance of the cadmium in drinking water, and method is simple.Additionally provide by this mistake
Filter element, purifier and water dispenser that filter medium is constituted.
The invention provides a kind of preparation method removing the filter medium of cadmium in drinking water, walk including following
Suddenly：
A) ultra-high molecular weight polyethylene powder, activated carbon powder, zeolite powder, floats and gas generation agent are mixed,
Obtain mixture, described ultra-high molecular weight polyethylene powder, activated carbon powder, zeolite powder, floats and send out
The weight of hole agent is than for 200～300:50～100:100～200:50～100:50～100；
B) mixture of step a) gained is suppressed in a mold, sinters, cooled down；
Described pressing pressure is 0.4MPa～1Mpa；Described sintering temperature is 200 DEG C～300 DEG C；Described burning
The knot time is 90～120min；Described chilling temperature is 40～60 DEG C.
Preferably, described zeolite powder is through the modified zeolite powder of cetyl trimethylammonium bromide.
Preferably, also include sepiolite powder, described sepiolite powder and described ultra-high molecular weight polyethylene powder,
The weight of activated carbon powder, zeolite powder, floats and gas generation agent is than for 50～140:
200～300:50～100:100～200:50～100:50～100.
Preferably, also include light burnt powder.
Preferably, described light burnt powder and described ultra-high molecular weight polyethylene powder, activated carbon powder, zeolite powder,
The weight of floats and gas generation agent is than for 80～150:
200～300:50～100:100～200:50～100:50～100.
The invention provides the preparation method according to the claims obtain for removing drinking water
The filter medium of middle cadmium.
The invention provides a kind of filter element, the filter medium described in the claims is constituted.
The invention provides a kind of purifier, including the filter medium described in the claims or on
State the filter element described in claim.
The invention provides a kind of water dispenser, including the purifier described in the claims.
Compared with prior art, the invention provides a kind of remove drinking water in cadmium filter medium preparation
Method, comprises the following steps：A) by ultra-high molecular weight polyethylene powder, activated carbon powder, zeolite powder, phosphorus ash
Stone powder and gas generation agent mixing, obtain mixture, described ultra-high molecular weight polyethylene powder, activated carbon powder, boiling
The weight ratio of stone powder, floats and gas generation agent is
200～300:50～100:100～200:50～100:50～100；B) by the mixture of step a) gained in a mold
Compacting, sintering, cooling；Described pressing pressure is 0.4MPa～1Mpa；Described sintering temperature is 200 DEG C
～300 DEG C；Described sintering time is 90～120min；Described chilling temperature is 40～60 DEG C.The present invention is upper
State under the synergism of raw material, the filter medium preparing is high to the clearance of cadmium in water, and method is simple,
It is applied to the drinking water being polluted by it, exempt the injury that element cadmium produces to human body, easy to use, cost
Low, additionally, due to using filter element, it is not powder body, so without subsequent treatment, suitable home terminal
Drinking-water is processed.After testing this filter medium to the clearance of cadmium in drinking water more than 98.6%.
Specific embodiment
The invention provides a kind of preparation method removing the filter medium of cadmium in drinking water, walk including following
Suddenly：
A) ultra-high molecular weight polyethylene powder, activated carbon powder, zeolite powder, floats and gas generation agent are mixed,
Obtain mixture, described ultra-high molecular weight polyethylene powder, activated carbon powder, zeolite powder, floats and send out
The weight of hole agent is than for 200～300:50～100:100～200:50～100:50～100；
B) mixture of step a) gained is suppressed in a mold, sinters, cooled down；
Described pressing pressure is 0.4MPa～1Mpa；Described sintering temperature is 200 DEG C～300 DEG C；Described burning
The knot time is 90～120min；Described chilling temperature is 40～60 DEG C.
The present invention first by ultra-high molecular weight polyethylene powder, activated carbon powder, zeolite powder, floats and sends out
Hole agent mixing, obtains mixture, described ultra-high molecular weight polyethylene powder, activated carbon powder, zeolite powder, phosphorus
The weight of limestone flour and gas generation agent is than for 200～300:50～100:100～200:50～100:50～100；It is preferably
210～290:60～90:120～180:60～90:60～90；More preferably
220～280:65～85:130～170:65～85:65～85.
In the present invention, the weight average molecular weight of described ultra-high molecular weight polyethylene is preferably 1,000,000～7,000,000,
More preferably 2,000,000～6,000,000, most preferably 2,500,000～4,000,000.Preferably particle diameter be 89 μm～
104μm.Ultra-high molecular weight polyethylene can obtain from domestic production producer, as limited in Beijing Orient petrochemical industry
Second auxiliary factory of company can provide M-I type (molecular weight is 150 ± 500,000), (molecular weight is 250 ± 50 to M-II type
Ten thousand), M-III type (molecular weight is 350 ± 500,000), M-IV type (molecular weight is more than 4,000,000) etc.
The product of specification.One effect of ultra-high molecular weight polyethylene is bonding and the work forming filter medium skeleton
With because the molecular weight of ultra-high molecular weight polyethylene is big, melt viscosity is very high, can not flow after melting
Dynamic, so passing through compacting using ultra-high molecular weight polyethylene, sintering the filter medium obtaining, easily being formed
Micropore, can play the effect of cadmium in absorption water.
In the present invention, activated carbon is a kind of porous material, has cellular pore structure, larger
Specific surface area, special surface functional group, stable process based prediction model, be excellent adsorbent,
Catalyst or catalyst carrier.Wood activated charcoal, ore deposit are preferably divided into according to the different activities charcoal of raw material sources
Activated carbon that raw material of substance activated carbon and other raw materials are made etc..Wherein, described wood activated charcoal preferably wraps
Include cocoanut active charcoal, Fructus Pruni shell activated carbon, wooden burgy；Described mineral raw material activated carbon preferably includes respectively
Plant the activated carbon that coal and oil and its processing product are made for raw material；The activated carbon that other raw materials are made is preferred
The activated carbon made including scrap rubber, waste plastics.Present invention preferably uses with coconut husk material for the work in source
Property charcoal, its intensity is higher, absorption property is good, more preferably with coconut husk material for source medical activated carbon.
In the present invention, the specific surface area of described activated carbon is preferably not less than 500m2/ g, more desirably not less than
1000m2/g.Activated carbon can efficiently adsorb Organic substance in water, especially medical activated carbon, as with
Cross the product of country's correlation drug surveilance standard, impurity content is low, and surface area is bigger, and adsorption effect is also more
Good, and can ensure that filter medium is directly used in the process of drinking water from medical activated carbon.The present invention
Preferably employ the medical activated carbon that particle diameter is 74～250 μm.
Activated carbon described in preferred pair of the present invention is modified processing, and specially adopts cetyl trimethyl chlorine
Change ammonium does modifying agent and activated carbon is modified process.Through modified activated carbon, cadmium is had preferably
Absorbability.
Zeolite is the general name of aqueous polysilicate, and its crystalline texture is mainly made up of silicon-oxy tetrahedron, its
Middle part tetravalence silicon ion is replaced by trivalent silicon ion, leads to negative charge superfluous, therefore has alkali gold in structure
Belong to (or alkaline-earth metal) isoequilibrium electric charge ion, have in zeolite framework simultaneously certain pore size vestibule and
Duct, determines it and has the properties such as absorption, ion exchange.In the present invention, zeolite powder is preferably warp
Cross the zeolite powder of modification, specially：Natural zeolite deionized water is cleaned up, dries, weigh one
Determine the zeolite of quality, be immersed in certain density modifying agent, be sufficiently stirred for no less than two hours, neutralization
After filter, deionized water cleans up, dry for standby.
Zeolite of the present invention is preferably clinoptilolite.Clinoptilolite described in preferred pair of the present invention is modified,
Described modifying agent is preferably cetyl trimethylammonium bromide.Zeolite is modified process using modifying agent
Time be generally preferably no less than 2 hours, more preferably no less than 4 hours.
Through the zeolite of modification, contained impurity in mineral and soluble substance can be removed, in mineral structure
In etch abundant hole and vestibule, increase its surface area, thus improve the absorption of zeolite, ion hand over
The property such as change.Modified zeolite passes through physical absorption and chemisorbed can improve the suction to arsenic further
Attached ability.The particle diameter of described zeolite is preferably 44～124 μm, more preferably 54～114 μm.
The chemical formula of apatite is A10[XO4]6Z2, the isomorph that can extensively occur in its crystal structure
Replace.In chemical formula, A, based on bivalent cation, mainly has Ca2+,Mn2+, Sr2+,Ba2+,Pb2+,Na+,
Cd2+、Mg2+、Fe3+、Al3+、Re3+Deng；[XO4] include [PO4]3-、[SiO4]4-、[SO4]2-、[CO3]2-
Deng；And Z is F-、OH-、Cl-Deng.In structure, A position ion has two kinds of co-ordination positions, is coordination respectively
The positions for 9 for the number and position that ligancy is 7, and phosphorus oxygen tetrahedron then passes through corner-sharing top or coplanar many
Face body couples together.Polyhedron, around six neutral helical axis distribution, constitutes the structure channel of parallel C axle.
According to passage intermediate ion F-、OH-、Cl-Relative amount can be with fraction fluor-apatite, hydroxyapatite and chlorine phosphorus
Lime stone.Because the valence link of two kinds of positions of ion is different with radius.Therefore, the entrance of bivalent cation will be produced
Raw regioselectivity and form orderly superstructure, the presence of two kinds of location A simultaneously makes it to various half
The divalent metal in footpath has extensive containment.
Apatite is the skeleton of vertebratess and the mankind, the primary non-organic component in tooth.Enter with drinking water
Enter human body every etc. heavy metal ion easily with human body in biogenic apatite in calcium exchange, thus causing
The pathological changes of sclerotin, tooth or human body.The inventors discovered that the inorganic ionss lattice absorption of apatite and ion
Exchange interaction is conducive to adsorbing the cadmium in drinking water.
Gas generation agent of the present invention is that a class easily decomposes the material producing a large amount of gases and causing hair engaging aperture effect,
Wherein azo compound, sodium bicarbonate, ammonium hydrogen carbonate, ammonium carbonate, sulphonyl nitrile compounds, oxalic acid
Etc. being that it typically represents.Preferably, gas generation agent be azodicarbonamide, food grade ammonium bicarbonate,
At least one in oxalic acid.Wherein, food grade ammonium bicarbonate is also referred to as AMMONIUM BICARBONATE FOOD GRADE, with technical grade
Ammonium hydrogen carbonate distinguishes.Although technical grade ammonium hydrogen carbonate also plays the role of hair engaging aperture, it may contain
The impurity of insalubrity, should not be used as the raw materials for production of Drinking Water Filtration medium.
In the present invention, by above-mentioned ultra-high molecular weight polyethylene powder, activated carbon powder, zeolite powder, phosphorus ash
Stone powder and the clearance cooperating and interacting, jointly making for the cadmium in drinking water of gas generation agent
Height, effect is good.
In the present invention, it is preferred to also include light burnt powder, magnesite claims " light in 750-1100 DEG C of temperature lower calcination
Burn ", its product claims light-burning magnesium powder, referred to as light burnt powder.Described light burnt powder and described superhigh molecular weight polyethylene
The weight ratio preferably 80～150 of alkene powder, activated carbon powder, zeolite powder, floats and gas generation agent:
200～300:50～100:100～200:50～100:50～100, more preferably 90～130:
220～280:60～90:120～180:60～90:60～90.
In the present invention, described light burnt powder and above-mentioned ultra-high molecular weight polyethylene powder, activated carbon powder, zeolite
Powder, floats and gas generation agent can cooperate and interact, and can significantly improve the cadmium in drinking water
Clearance, effect is more preferable.
In the present invention, it is preferred to also include sepiolite powder, described ultra-high molecular weight polyethylene powder, activated carbon
Powder, zeolite powder, floats, gas generation agent, the weight ratio preferably 50～140 of sepiolite powder:
200～300:50～100:100～200:50～100:50～100；More preferably
60～130:210～290:60～90:120～180:60～90:60～90；Most preferably
70～120:220～280:65～85:130～170:65～85：65～85.
Meerschaum is a kind of clay mineral of magnesium silicate containing Shuifu County of tool layer chain structure.Orthorhombic system or list
Oblique system, typically in block, earthy or fibrous agrregate.The reason meerschaum is according to stroke is divided into heat
Liquid type meerschaum and appositional pattern meerschaum two types, commonly referred to α-meerschaum and β meerschaum.Hydrothermal solution
Type meerschaum is formed by hydrothermal solution direct crystallization or by volcanic glass, the mineral containing magnesium through low temperature hot liquid alteration
Become, often originate in the dolomitic limestone of rich magnesium, in dolomitic marble stone；Appositional pattern sepiolite deposit often with
Carbonate, clay rock symbiosis, are generated by diagenesis.Hot-liquid type sepiolite is in fibre bundle shape,
Magnesium oxide and dioxide-containing silica are high, and alumina content is low, is Mg-rich sepiolite；Appositional pattern meerschaum is in
Argillaceous, but appointing under the microscope is in so threadiness, and alumina content is high, and Mg and dioxide-containing silica are low,
For rich meerschalminite.
Meerschaum has big specific surface area and pore volume, has the passage running through total and hole, and
And there are three class active center in meerschaum surface：(1) oxygen atom in silicon-oxy tetrahedron layer, oxygen atom carries
For weak electric charge thus carrying out the absorption to adsorbate；(2) in the moisture of edge and magnesium ion coordination
Son, can form hydrogen bond with adsorbate；(3) in tetrahedral faces, Si-o-Si bond fission and the Si-OH that produces
Ion cluster, compensates remaining electric charge by a proton or a polyhydroxylated molecule, and these ion clusters are along fibre
Dimension axle is distributed with 5 angstroms of spacing, and its quantity depends on the size of fiber and the scarce cave of crystal.These Si-OH
Ion cluster can be with the interaction of molecules being attracted on meerschaum outer surface, can also be organic with some
Reagent forms covalent bond.These active center make the absorption property of meerschaum very well, including the non-pole of absorption
Property or the organic compound of low pole.
In the present invention, it is preferred to the sepiolite powder the use of particle diameter being 18～150 μm, more preferably use
18～100 μm.Wherein the little sepiolite powder specific surface area of particle diameter is greatly it is easier to play adsorption.
The present invention preferably by described sepiolite powder activation processing, more preferably through acid activation.It is specially：Make
The sulphuric acid being 0.1～20% with concentration is 20～100 DEG C of immersion treatment 1～15h in temperature.
In the present invention, by above-mentioned ultra-high molecular weight polyethylene powder, activated carbon powder, zeolite powder, phosphorus ash
Stone powder, gas generation agent, the cooperating and interacting of sepiolite powder, common make in drinking water
The clearance of cadmium is high, and effect is good.And cooperating and interacting of above-mentioned substance and light burnt powder more can
Improve the clearance of cadmium in water.
In the present invention, source and purity for above-mentioned raw materials are not particularly limited, preferably commercially available.
The present invention has carried out more detailed for several raw materials used in step a) in above-mentioned preparation method
Description, under the collaborative adduction of this several raw material, the cadmium in water can fully be adsorbed.
In the present invention, there is no any restriction for the mixing of above-mentioned raw materials, can for any will not be notable
The low shear mixer of change diameter of particle and particle size distribution or agitator, can be preferably blunt impeller leaf
The agitator of piece, drum-type blender, spiral agitator etc..For above-mentioned mixer and agitator
Rotating speed will be not limited to this depending on the type of blender, preferably avoids dust of kicking up.
After above-mentioned raw materials are mixed, the mixture of step a) gained is suppressed in a mold, sinters, cooled down.
Specifically, mixed powder body is filled in pre-designed mould, by being pressed
Real, pressure is preferably 0.4MPa～1Mpa, more preferably 0.5MPa～0.9Mpa；And with mould therefor
Material is adapted；Mould by aluminum, cast iron, steel or any suitable can bear relevant pressure and temperature
Material manufacture.Silicone oil or any other can be can be selected in mould inner surface release agent application
Hardly it is adsorbed onto the commercially available releasing agent on filter medium, it is possible to use processing release paper.Sintering temperature is excellent
Elect 200 DEG C～300 DEG C as, more preferably 220 DEG C～280 DEG C；Sintering time is preferably 90 minutes～120
Minute, more preferably 100 minutes～110 minutes；It is cooled to 40 DEG C～60 DEG C demouldings after sintering.Here
In manufacturing process, after inventor's test many times, draw sintering range 220 DEG C～
The filter medium produced in 280 DEG C, filter effect is more preferable.
Present invention also offers technical scheme below：A kind of removal drinking water being made up of above-mentioned filter medium
The filter element of middle cadmium.
Present invention also offers technical scheme below：A kind of purifier, including above-mentioned filter medium or
Person's filter element.
Present invention also offers a kind of water dispenser including above-mentioned purifier.
The present invention under the synergism of above-mentioned raw materials, the removal to cadmium in water of the filter medium for preparing
Rate is high, and method simply it is adaptable to the drinking water being polluted by it, exempts the injury that element cadmium produces to human body,
Easy to use, low cost, additionally, due to using filter element, is not powder body, so without subsequent treatment,
Suitable home terminal drinking-water is processed.After testing this filter medium to the clearance of cadmium in drinking water 98.6%
More than.
In order to further illustrate the present invention, the removal drinking water cadmium to present invention offer with reference to embodiments
Filter medium be described in detail.
Embodiment 1
(1) the ultra-high molecular weight polyethylene powder 200g that particle diameter is 89 μm～104 μm, described superelevation are weighed
Molecular weight polyethylene is the M-I type product of Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecule
Measure as 1,500,000；
(2) the medicinal active powdered carbon 50g that particle diameter is 100 μm, the ratio table of described medical activated carbon are weighed
Area is 800m2/g；
(3) weigh floats 50g；
(4) weighing particle diameter is 90 μm of clinoptilolite powder 100g；
(5) weigh gas generation agent 50g；
(6) above-mentioned five kinds of powder are put into 10 minutes mix homogeneously of stirring in mechanical agitator；
(7) mixed powder packing is entered in tubular die, suppresses under the hydraulic pressure of 0.7MPa,
Sinter 100 minutes at a temperature of 260 DEG C；
(8) naturally cool to 50 DEG C and then use the siloxanes uranium releasing agent demoulding, obtain final product filter element.
A diameter of 50mm of the filter element of preparation, length is 200mm.
Embodiment 2
(1) the ultra-high molecular weight polyethylene powder 250g that particle diameter is 89 μm～104 μm, described superelevation are weighed
Molecular weight polyethylene is the M-III type product of Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecule
Measure as 3,500,000；
(2) weigh the hexadecyltrimethylammonium chloride modification medicinal active powdered carbon that particle diameter is 150 μm
75g, the specific surface area of described medical activated carbon is 1500m2/g；
(3) weigh floats 75g；
(4) weighing particle diameter is the modified clinoptilolite powder 150g of 80 μm of cetyl trimethylammonium bromide；
(5) weigh gas generation agent 75g；
(6) above-mentioned five kinds of powder are put into 10 minutes mix homogeneously of stirring in spiral agitator；
(7) mixed powder packing is entered in tubular die, suppresses under the hydraulic pressure of 0.6MPa,
Sinter 105 minutes at a temperature of 250 DEG C；
(8) naturally cool to 50 DEG C and then use the siloxanes uranium releasing agent demoulding, obtain final product filter element.
A diameter of 50mm of the filter element of preparation, length is 200mm.
Embodiment 3
(1) the ultra-high molecular weight polyethylene powder 300g that particle diameter is 89 μm～104 μm, described superelevation are weighed
Molecular weight polyethylene is the M-IV type product of Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecule
Measure as 4,500,000；
(2) weighing particle diameter is 100 μm of medicinal active powdered carbon 100g, the specific surface of described medical activated carbon
Amass as 1200m2/g；
(3) weigh floats 100g；
(4) weighing particle diameter is the modified clinoptilolite powder 200g of 100 μm of cetyl trimethylammonium bromide；
(5) weigh gas generation agent 100g；
(6) above-mentioned five kinds of powder are put into 10 minutes mix homogeneously of stirring in spiral agitator；
(7) mixed powder packing is entered in tubular die, suppresses under the hydraulic pressure of 0.9MPa,
Sinter 110 minutes at a temperature of 230 DEG C；
(8) naturally cool to 40 DEG C and then use the release paper demoulding, obtain final product filter element.
A diameter of 50mm of the filter element of preparation, length is 200mm.
Embodiment 4
(1) the ultra-high molecular weight polyethylene powder 250g that particle diameter is 89 μm～104 μm, described superelevation are weighed
Molecular weight polyethylene is the M-III type product of Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecule
Measure as 3,500,000；
(2) weigh the hexadecyltrimethylammonium chloride modification medicinal active powdered carbon that particle diameter is 150 μm
75g, the specific surface area of described medical activated carbon is 1500m2/g；
(3) weigh floats 75g；
(4) weighing particle diameter is the modified clinoptilolite powder 150g of 80 μm of cetyl trimethylammonium bromide；
(5) weigh gas generation agent 75g；
(6) weigh light burnt powder 120g；
(7) above-mentioned six kinds of powder are put into 10 minutes mix homogeneously of stirring in spiral agitator；
(8) mixed powder packing is entered in tubular die, suppresses under the hydraulic pressure of 0.6MPa,
Sinter 105 minutes at a temperature of 250 DEG C；
(9) naturally cool to 50 DEG C and then use the siloxanes uranium releasing agent demoulding, obtain final product filter element.
A diameter of 50mm of the filter element of preparation, length is 200mm.
Embodiment 5
(1) the ultra-high molecular weight polyethylene powder 250g that particle diameter is 89 μm～104 μm, described superelevation are weighed
Molecular weight polyethylene is the M-III type product of Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecule
Measure as 3,500,000；
(2) weigh the hexadecyltrimethylammonium chloride modification medicinal active powdered carbon that particle diameter is 150 μm
75g, the specific surface area of described medical activated carbon is 1500m2/g；
(3) weigh floats 75g；
(4) weighing particle diameter is the modified clinoptilolite powder 150g of 80 μm of cetyl trimethylammonium bromide；
(5) weigh gas generation agent 75g；
(6) weigh sepiolite powder 100g；
(7) above-mentioned six kinds of powder are put into 10 minutes mix homogeneously of stirring in spiral agitator；
(8) mixed powder packing is entered in tubular die, suppresses under the hydraulic pressure of 0.6MPa,
Sinter 105 minutes at a temperature of 250 DEG C；
(9) naturally cool to 50 DEG C and then use the siloxanes uranium releasing agent demoulding, obtain final product filter element.
A diameter of 50mm of the filter element of preparation, length is 200mm.
Embodiment 6
(1) the ultra-high molecular weight polyethylene powder 250g that particle diameter is 89 μm～104 μm, described superelevation are weighed
Molecular weight polyethylene is the M-III type product of Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecule
Measure as 3,500,000；
(2) weigh the hexadecyltrimethylammonium chloride modification medicinal active powdered carbon that particle diameter is 150 μm
75g, the specific surface area of described medical activated carbon is 1500m2/g；
(3) weigh floats 75g；
(4) weighing particle diameter is the modified clinoptilolite powder 150g of 80 μm of cetyl trimethylammonium bromide；
(5) weigh gas generation agent 75g；
(6) weigh light burnt powder 120g；
(7) weigh sepiolite powder 100g；
(8) above-mentioned seven kinds of powder are put into 10 minutes mix homogeneously of stirring in spiral agitator；
(8) mixed powder packing is entered in tubular die, suppresses under the hydraulic pressure of 0.6MPa,
Sinter 105 minutes at a temperature of 250 DEG C；
(10) naturally cool to 50 DEG C and then use the siloxanes uranium releasing agent demoulding, obtain final product filter element.
A diameter of 50mm of the filter element of preparation, length is 200mm.
Comparative example 1
(1) the ultra-high molecular weight polyethylene powder 250g that particle diameter is 89 μm～104 μm, described superelevation are weighed
Molecular weight polyethylene is the M-III type product of Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecule
Measure as 3,500,000；
(2) weigh floats 75g；
(3) weighing particle diameter is the modified clinoptilolite powder 150g of 80 μm of cetyl trimethylammonium bromide；
(4) weigh gas generation agent 75g；
(5) above-mentioned four kinds of powder are put into 10 minutes mix homogeneously of stirring in spiral agitator；
(6) mixed powder packing is entered in tubular die, suppresses under the hydraulic pressure of 0.6MPa,
Sinter 105 minutes at a temperature of 250 DEG C；
(7) naturally cool to 50 DEG C and then use the siloxanes uranium releasing agent demoulding, obtain final product filter element.
A diameter of 50mm of the filter element of preparation, length is 200mm.
Comparative example 2
(1) the ultra-high molecular weight polyethylene powder 250g that particle diameter is 89 μm～104 μm, described superelevation are weighed
Molecular weight polyethylene is the M-III type product of Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecule
Measure as 3,500,000；
(2) weigh the hexadecyltrimethylammonium chloride modification medicinal active powdered carbon that particle diameter is 150 μm
75g, the specific surface area of described medical activated carbon is 1500m2/g；
(3) weighing particle diameter is the modified clinoptilolite powder 150g of 80 μm of cetyl trimethylammonium bromide；
(4) weigh gas generation agent 75g；
(5) above-mentioned four kinds of powder are put into 10 minutes mix homogeneously of stirring in spiral agitator；
(6) mixed powder packing is entered in tubular die, suppresses under the hydraulic pressure of 0.6MPa,
Sinter 105 minutes at a temperature of 250 DEG C；
(7) naturally cool to 50 DEG C and then use the siloxanes uranium releasing agent demoulding, obtain final product filter element.
A diameter of 50mm of the filter element of preparation, length is 200mm.
Comparative example 3
(1) the ultra-high molecular weight polyethylene powder 250g that particle diameter is 89 μm～104 μm, described superelevation are weighed
Molecular weight polyethylene is the M-III type product of Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecule
Measure as 3,500,000；
(2) weigh the hexadecyltrimethylammonium chloride modification medicinal active powdered carbon that particle diameter is 150 μm
75g, the specific surface area of described medical activated carbon is 1500m2/g；
(3) weigh floats 75g；
(4) weigh gas generation agent 75g；
(5) above-mentioned four kinds of powder are put into 10 minutes mix homogeneously of stirring in spiral agitator；
(6) mixed powder packing is entered in tubular die, suppresses under the hydraulic pressure of 0.6MPa,
Sinter 105 minutes at a temperature of 250 DEG C；
(7) naturally cool to 50 DEG C and then use the siloxanes uranium releasing agent demoulding, obtain final product filter element.
A diameter of 50mm of the filter element of preparation, length is 200mm.
Embodiment 7
Example 1～6 and the filter element of comparative example 1～3 gained, liner two-layer nonwoven, outsourcing two
Layer non-woven fabrics, then wrap polypropylene porous web in outer layer, filter element two ends are bonded with connection end cap, are positioned over
In rustless steel or plastic casing, for processing drinking water, after testing, this filter core is in drinking water
The removal effect of cadmium is good.As shown in table 1, it is the filter providing using enforcement 1～6 and comparative example 1～3
The content to the cadmium before and after drinking water treatment for the core.
Table 1 is using the cadmium content in water after filter element before processing, unit：μg/L
As it can be seen from table 1 go the cadmium in eliminating water to achieve good effect using the filter element of the present invention,
More than 98.6%, this filter element is especially suitable for the needs of home terminal drinking water treatment to clearance.
Above to provided by the present invention for remove in drinking water filter medium of cadmium and preparation method thereof with
And be described in detail by the filter element that this filter medium is constituted.The above is only the preferred reality of the present invention
Apply mode it is noted that for those skilled in the art, without departing from the present invention
On the premise of principle, some improvements and modifications can also be made, these improvements and modifications also should be regarded as this
Bright protection domain.
Claims (7)
1. a kind of preparation method removing the filter medium of cadmium in drinking water is it is characterised in that include following
Step：
A) by ultra-high molecular weight polyethylene powder, activated carbon powder, zeolite powder, floats, gas generation agent and light
Burn powder mixing, obtain mixture, described ultra-high molecular weight polyethylene powder, activated carbon powder, zeolite powder, phosphorus
The weight ratio of limestone flour, gas generation agent and light burnt powder is
200～300:50～100:100～200:50～100:50～100:80～150；
B) mixture of step a) gained is suppressed in a mold, sinters, cooled down；
Described pressing pressure is 0.4MPa～1Mpa；Described sintering temperature is 200 DEG C～300 DEG C；Described burning
The knot time is 90～120min；Described chilling temperature is 40～60 DEG C.
2. preparation method according to claim 1 is it is characterised in that described zeolite powder is through ten
The modified zeolite powder of six alkyl trimethyl ammonium bromides.
3. preparation method according to claim 1 is it is characterised in that also include sepiolite powder, institute
State sepiolite powder and described ultra-high molecular weight polyethylene powder, activated carbon powder, zeolite powder, floats and send out
The weight of hole agent is than for 50～140:200～300:50～100:100～200:50～100:50～100.
4. preparation method according to any one of claim 1 to 3 obtain for removing drinking water
The filter medium of middle cadmium.
5. a kind of filter element is it is characterised in that be made up of the filter medium described in claim 4.
6. a kind of purifier is it is characterised in that include the filter medium described in claim 4 or power
Profit requires the filter element described in 5.
7. a kind of water dispenser is it is characterised in that include the purifier described in claim 6.
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| CN107694524A (en) * | 2017-10-30 | 2018-02-16 | 安徽铭能保温科技有限公司 | A kind of cadmium pollution adsorbent and preparation method thereof |
| CN113546602B (en) * | 2021-07-27 | 2023-02-24 | 中南大学 | (hydroxyl, chlorine) apatite/zeolite composite porous material and preparation method thereof |
| CN113941298B (en) * | 2021-10-22 | 2023-06-27 | 南昌大学 | Preparation method of eye photothermal treatment carrier |
| CN115475601B (en) * | 2021-11-15 | 2023-08-15 | 青岛海尔施特劳斯水设备有限公司 | Cadmium-removing sintered active carbon rod, preparation method thereof and filter element |
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