CN102059022B - Filter medium for removing sodium in drinking water - Google Patents
Filter medium for removing sodium in drinking water Download PDFInfo
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- CN102059022B CN102059022B CN201010555650A CN201010555650A CN102059022B CN 102059022 B CN102059022 B CN 102059022B CN 201010555650 A CN201010555650 A CN 201010555650A CN 201010555650 A CN201010555650 A CN 201010555650A CN 102059022 B CN102059022 B CN 102059022B
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Abstract
The invention discloses a filter medium for removing sodium in drinking water which comprising a zeolite manometer molecular sieve composite material and a tamarind gum composite material in a weight ratio of (1: 4)-(4: 1), wherein the zeolite manometer molecular sieve composite material is formed by loading zeolite manometer molecular sieves on cation exchange resins and calcium chloride, and the tamarind gum composite material is formed by loading tamarind gum on the cation exchange resins and the calcium chloride. The cation exchange resins and the calcium chloride are taken as ion exchangers to exchange sodion in the water by ion exchange, and the zeolite manometer molecular sieves and the tamarind gum can effectively absorb the sodion in the water. The filter medium respectively loads the zeolite manometer molecular sieves and the tamarind gum on the cation exchange resins and the calcium chloride to have better effects for absorbing and exchanging the sodium, so that the removing efficiency is improved, the capability of the filter medium is improved, and the service life of the ion exchangers namely the cation exchange resins and the calcium chloride is prolonged.
Description
Technical field
The present invention relates to water treatment field, be specifically related to a kind of filter medium that is used for removing in drinking water sodium and preparation method thereof.
Background technology
Sodium is a kind of important inorganic elements in the human body, generally speaking, becomes the interior sodium content of human body to be approximately 3200-4170mmol, 0.15% of about percentage of liveweight.Sodium accounts for 44%～50% of overall sodium weight mainly at extracellular fluid in the body, and bone content is up to 40%～47%, and intracellular fluid content is lower, and only 9%～10%.Though sodium is requisite element in the human body, the edible of sodium can not be excessive.The harm that the sodium intake too much causes human body is many-sided.For example, a medical research of the U.S. recently shows that excess salt may cause being losing one's memory indirectly, and progressively has influence on individual's intelligence.Research shows that also the sodium ion increase can cause people's face cell dehydration in the body, thereby causes skin aging, and the time has been grown wrinkle and can increase.In addition, the sodium intake too much also can let hair become withered and yellow, excessive sodium and can get muddled by zero water metabolism, thereby causes excessive moisture retention to cause edema in vivo.
The result of " Chinese residents nutrition and investigation of health conditions report " (2002) shows, the situation of various conventional elements of China's resident's ubiquity and micro-insufficiency of intake, and sodium element is an exception only.With Zhejiang is example, suffers from hypertensive patient in 5,200 ten thousand populations and has reached about 1,000 ten thousand people, and only the hypertension illness rate of Hangzhou has 3 to be too much to cause because take in salt up to 22.49% among wherein per 10 hyperpietics.Hypertension, hyperglycaemia, high cholesterol and overweight number are also increasing year by year among the Beijing residents, and one of municipal health bureau's investigation result reason is to eat salt to exceed standard one times.The intake of Chinese residents sodium generally exceeds standard, and superscale has had a strong impact on China resident's holistic health level.
The upper limit for the sodium content in the water among the China drinking water sanitary standard GB5749-2006 is 200mg/L, and in fact this standard has surpassed the needs of human body.The american heart association (AHA) and the World Health Organization (WUO) advise that recently the sodium amount that the contains standard max of drinking water is 20mg/L, but surpass 20mg/L at the drinking water content of the U.S. 40%.
In the prior art, disclose multiple processing method, removed producing little effect of sodium in the water like the coagulation of routine, deposition, filtered water processing method for drinking water; The charcoal absorption technology, adsorbance and adsorption efficiency are not high; The adsorption effect of these nonmetallic minerals such as montmorillonite, diatomite, sepiolite, rectorite is more not as good as active carbon; Biodegradation needs cultured strain, and biomembrane filled tower is hung film, and the cycle is long, process is loaded down with trivial details and use inconvenience, is not suitable for the water treatment of home terminal.And for resin adsorption method and extraction, service condition is acid, and operating process is cumbersome; The little electrolysis of iron charcoal-ferrous reduction-oxidation method, the device more complicated only is applicable to the water that hangs down the pH value, also need add coloured catalytic oxidant sometimes; Electrochemical oxidation process, reaction unit are the multinomial catalytic reactor of fixed bed electrochemistry, and complex structure uses inconvenient; High-level oxidation technology O
3/ UV, O
3/ H
2O
2, O
3/ TiO
2Deng, the equipment more complicated, cost is high.
Poor removal effect when considering the sodium of filter method of the prior art in removing drinking water need provide a kind of filter medium that sodium in the drinking water is had higher clearance.
Summary of the invention
The technical problem that the present invention solves is that a kind of preparation method of filter medium is provided, and this filter medium has higher removal to the sodium in the drinking water, and the present invention also provides filter core, the water purifying plant and drinking Fountains that comprises above-mentioned filter medium.
In order to solve above technical problem; The present invention provides a kind of filter medium that is used for removing drinking water sodium; Said filter medium comprises that weight ratio is 1: 4～4: 1 zeolite nano molecular sieve composite and a tamarind gum composite; Said zeolite nano molecular sieve composite is the zeolite nano molecular sieve to be loaded on cationic ion-exchange resin and the calcium chloride form, and said tamarind gum composite is tamarind gum to be loaded on cationic ion-exchange resin and the calcium chloride form.
Preferably, the weight ratio of zeolite nano molecular sieve composite in the said filter medium and tamarind gum composite is 1: 2～2: 1.
Preferably, the zeolite nano molecular sieve in the said zeolite nano molecular sieve composite and the weight ratio of cationic ion-exchange resin are 1: 2～2: 1.
Preferably, the weight ratio of tamarind in the said tamarind gum composite and cationic ion-exchange resin is 1: 2～2: 1.
Preferably, the cationic ion-exchange resin in the said filter medium is storng-acid cation exchange resin and/or weak-acid cation-exchange resin.
Preferably, said zeolite nano molecular sieve composite is prepared by following method, comprising:
Get the mixed that the zeolite nano molecular sieve mixes with water according to 1: 3～1: 8 and obtain first mixture;
In said first mixture, add the cationic ion-exchange resin mixing and obtain second mixture;
Said second mixture is heated to boiling, Separation of Solid and Liquid, the solid particle of obtaining joins to mix in the calcium chloride water and obtains the 3rd mixture;
With said the 3rd mixture heating, to filter, drying obtains zeolite nano molecular sieve composite.
Preferably, said tamarind gum composite is prepared by following method, comprising:
Getting the tamarind rubber powder mixes with water to mix according to 1: 3～1: 8 weight ratio and obtains the 11 mixture;
In said the 11 mixture, add the cationic ion-exchange resin mixing and obtain the 12 mixture;
Said the 12 mixture is heated to boiling, Separation of Solid and Liquid, the solid particle of obtaining joins to mix in the calcium chloride water and obtains the 13 mixture;
With said the 13 mixture heating, to filter, drying obtains the tamarind gum composite.
The present invention also provides a kind of filter core; Comprise filter cylinder; Above each described filter medium is housed in said filter cylinder, and the delivery port of said filter cylinder goes out place mat has the NACF felt, and the weight ratio of said filter medium and said active carbon fiber felt is 40～60: 2～3.
The present invention also provides a kind of purifier, comprises the described filter core of above technical scheme.
The present invention also provides a kind of water dispenser, comprises the described purifier of above technical scheme.
The present invention provides a kind of filter medium that is used for removing the sodium of quoting water; Comprise zeolite nano molecular sieve composite and tamarind gum composite; Said zeolite nano molecular sieve composite is the zeolite nano molecular sieve to be loaded on cationic ion-exchange resin and the calcium chloride form, and said tamarind gum composite is tamarind gum to be loaded on cationic ion-exchange resin and the calcium chloride form.Cationic ion-exchange resin and calcium chloride are as ion-exchanger; Its operation principle is through ion-exchange the sodium ion in the water to be replaced; Zeolite nano molecular sieve and tamarind then can effectively be adsorbed the sodium ion in the water; The present invention loads on zeolite nano molecular sieve and tamarind respectively respectively and can make above-mentioned substance that the absorption and the exchange of sodium are reached better effect on cationic ion-exchange resin and the calcium chloride; So not only efficient is removed in raising, and the raising capacity, and has prolonged the service life of appearance ion exchange resin and these two kinds of ion-exchangers of calcium chloride.
The specific embodiment
In order further to understand the present invention, below in conjunction with embodiment the preferred embodiment of the invention is described, describe just to further specifying feature and advantage of the present invention but should be appreciated that these, rather than to the restriction of claim of the present invention.
The present invention provides a kind of filter medium that is used for filtered water sodium; Said filter medium comprises that weight ratio is 1: 4～4: 1 zeolite nano molecular sieve composite and a tamarind gum composite; Said zeolite nano molecular sieve composite is the zeolite nano molecular sieve to be loaded on cationic ion-exchange resin and the calcium chloride form, and said tamarind gum composite is the tamarind rubber powder to be loaded on cationic ion-exchange resin and the calcium chloride form.
Cationic ion-exchange resin and calcium chloride are as ion-exchanger; Its operation principle is through ion-exchange the sodium ion in the water to be replaced; Zeolite nano molecular sieve and tamarind gum then can effectively adsorb the sodium ion in the water; The present invention loads on zeolite nano molecular sieve and tamarind gum respectively respectively and can make above-mentioned substance that the absorption and the exchange of sodium are reached better effect on cationic ion-exchange resin and the calcium chloride; So not only efficient is removed in raising, and the raising capacity, and has prolonged the service life of appearance ion exchange resin and these two kinds of ion-exchangers of calcium chloride.
Zeolite molecular sieve is a kind of aluminosilicate of crystal type, has the structure and the characteristic of crystal, and the surface is a solid skeletal, and the effect of absorbing molecules can be played in inner hole.Have the duct to interconnect between the hole, molecule is passed through by the duct.Because the crystallographic property in hole, the pore-size distribution of molecular sieve is homogeneous very.Molecular sieve carries out selective absorption according to the size in its crystals hole to molecule, just adsorbs a certain size molecule and repels the molecule of big material, thereby be called " molecular sieve " visually.Zeolite molecular sieve in chemical industry as solid absorbent, can be used for gas and liquid drying, purifying, separate and recovery, can desorb by the material of its absorption, zeolite molecular sieve with after can regenerate.Employed zeolite molecular sieve preferable particle size is 20nm～1000nm among the present invention; The zeolite nano molecular sieve of 40nm～200nm more preferably; The zeolite nano molecular sieve powder of the ZSM-5 class that preferred example can be produced for the green source of Dalian University of Science & Engineering environmental protection industry Co., Ltd, but be not limited thereto.
Among the present invention; The zeolite molecular sieve powder is loaded on cationic ion-exchange resin and the calcium chloride; Can zeolite molecular sieve be combined to the water demineralizing process to the adsorption process of sodium and cationic ion-exchange resin and calcium chloride like this; Not only can improve the exchange capacity of filter medium and, also prolong the service life of cationic ion-exchange resin the exchange efficiency of sodium ion.
Tamarind gum (tamarind gum); Also claim tamarind seed polysaccharide glue or tamarind gum, belong to the water soluble polymer adhesive, it can absorb cations such as calcium in the water, magnesium, sodium; The present invention loads on it on cationic ion-exchange resin and the calcium chloride; Therefore tamarind is combined to the adsorption process of sodium and the desalination processes of cationic ion-exchange resin and calcium chloride, can improve exchange capacity and, thereby also prolonged the service life of cationic ion-exchange resin the exchange efficiency of sodium ion.Preferred use particle diameter is 20 μ m～100 μ m among the present invention, and more preferably the tamarind carbohydrate gum powder of 30 μ m～70 μ m is as raw material.
Cationic ion-exchange resin in zeolite nano molecular sieve composite of the present invention and the tamarind gum composite; Can be storng-acid cation exchange resin; Also can be weak-acid cation-exchange resin, be preferably the mixture of storng-acid cation exchange resin and weak-acid cation-exchange resin; The storng-acid cation exchange resin in the said cationic ion-exchange resin mixture and the volume ratio of weak-acid cation-exchange resin are 1: 2～2: 1.
The object lesson of middle strong acidity cationic ion-exchange resin of the present invention can be the sulfonic acid or the sodium salt of styrene divinyl copolymer, the sodium salt shape HGR-W2 of article number such as The Dow Chemical Co.'s system, but be not limited thereto.The object lesson of weak-acid cation-exchange resin can be acrylic acid (or 2-methacrylic acid) divinylbenzene copolymer or its sodium salt, the sodium salt shape MAG-3 of article number such as The Dow Chemical Co.'s system, but be not limited thereto.
According to the present invention, said zeolite nano molecular sieve composite is prepared by following method, comprising:
Get the mixed that the zeolite nano molecular sieve mixes with water according to 1: 3～1: 8 and obtain first mixture;
In said first mixture, add the cationic ion-exchange resin mixing and obtain second mixture; The weight ratio of said cationic ion-exchange resin and said zeolite nano molecular sieve powder is 1: 2～2: 1; More preferably 1: 1; The average grain diameter of said cationic ion-exchange resin is preferably 0.15～5mm, more preferably 0.25～0.84mm;
Said second mixture is heated to boiling; Separation of Solid and Liquid; The solid particle of obtaining joins to mix in the calcium chloride water and obtains the 3rd mixture; The mass concentration of said calcium chloride water is preferably 10%～50%, and more preferably 25%～35%, the calcium chloride in the said calcium chloride water and the weight ratio of zeolite molecular sieve be preferably 1: 2～and 1: 4;
With said the 3rd mixture heating, heating-up temperature is preferably 40 ℃～60 ℃, is preferably 45 ℃～55 ℃, filters, and drying obtains zeolite nano molecular sieve composite.
According to the present invention, said tamarind gum composite is prepared by following method, comprising:
Get the tamarind rubber powder and mix with water to mix according to 1: 3～1: 8 weight ratio and obtain the 11 mixture, preferred, the weight ratio of said tamarind rubber powder and water is 1: 3～1: 5, more preferably 1: 4;
In said the 11 mixture, add the cationic ion-exchange resin mixing and obtain the 12 mixture; The weight ratio of said cationic ion-exchange resin and said tamarind rubber powder is 1: 2～2: 1; More preferably 1: 1; The average grain diameter of said cationic ion-exchange resin is preferably 0.15～5mm, more preferably 0.25～0.84mm;
Said the 12 mixture is heated to boiling; Separation of Solid and Liquid; The solid particle of obtaining joins to mix in the calcium chloride water and obtains the 13 mixture; The mass concentration of said calcium chloride water is preferably 10%～50%, and more preferably 25%～35%, the weight ratio of calcium chloride in the said calcium chloride water and tamarind rubber powder is preferably 1: 4～and 1: 6;
With said the 13 mixture heating, heating-up temperature is preferably 40 ℃～60 ℃, is preferably 45 ℃～55 ℃, filters, and drying obtains the tamarind gum composite.
Filter medium provided by the invention is mixed by zeolite nano molecular sieve composite and tamarind gum composite and obtains, and for mixed method, the present invention does not have special restriction, can adopt artificial batch mixing, can adopt mechanical batch mixing yet.When adopting mechanical batch mixing, can use shear mixer well known to those skilled in the art or agitator, such as the agitator with blunt impeller blade, drum-type blender, spiral agitator etc., rotating speed will be looked the type of blender and decide.
The present invention also provides a kind of filter core; The filter cylinder that is used for the splendid attire filter medium; The filter medium of said filter medium arbitrary scheme preparation more than being; The delivery port of said filter cylinder is provided with active carbon fiber felt, and the weight ratio of said filter medium and NACF felt is 40～60: 2～3, more preferably 50: 1.For filter cylinder, the present invention does not have special restriction, and its purpose belongs to general knowledge well known to those skilled in the art just for the splendid attire filter medium.
The present invention also provides a kind of purifier, and above-mentioned filter core is housed in said purifier.The present invention also provides a kind of water dispenser, and above-mentioned purifier is housed in said water dispenser.
Below with specific embodiment effect of the present invention is described, but protection scope of the present invention is not limited by the following examples.
Use raw material following among the present invention:
The tamarind seed polysaccharide glue GB20.011 of Wuhan Yuancheng Technology Development Co., Ltd.
The green source of the zeolite nano molecular sieve Dalian University of Science & Engineering DNZ-01 of environmental protection industry Co., Ltd type ZSM-5 zeolite molecular sieve
The HGR-W2 of storng-acid cation exchange resin The Dow Chemical Co. (US) 2030 Dow Center, Abbott Road, Midland, Michigan 48640,
The MAG-3 of acid cation exchange resin The Dow Chemical Co. (US) 2030 Dow Center, Abbott Road, Midland, Michigan 48640, of institute.
Embodiment 1
Get zeolite nano molecular sieve 1000g, add pure water 5000ml mixing and stirring and obtain first mixture;
In said first mixture, add storng-acid cation exchange resin 1000g mixing and obtain second mixture;
Said second mixture is heated to boiling, Separation of Solid and Liquid, it is that 35% calcium chloride water gathers to mix and obtains the 3rd mixture that the solid particle of obtaining joins mass concentration, the weight ratio of calcium chloride and zeolite nano molecular sieve is 1: 2;
The 3rd mixture is heated to 55 ℃, filters, drying obtains zeolite nano molecular sieve composite.
Embodiment 2
Get zeolite nano molecular sieve 1000g, add pure water 4000ml mixing and stirring and obtain first mixture;
In said first mixture, add weak-acid cation-exchange resin 1200g mixing and obtain second mixture;
Said second mixture is heated to boiling, Separation of Solid and Liquid, it is that 30% calcium chloride water gathers to mix and obtains the 3rd mixture that the solid particle of obtaining joins mass concentration, the weight ratio of calcium chloride and zeolite nano molecular sieve is 1: 3;
The 3rd mixture is heated to 50 ℃, filters, drying obtains zeolite nano molecular sieve composite.
Embodiment 3
Get zeolite nano molecular sieve 1000g, add pure water 5500ml mixing and stirring and obtain first mixture;
In said first mixture, add by 600g highly acid oxonium ion exchanger resin and the mixing of 600g weak-acid cation-exchange resin and obtain second mixture;
Said second mixture is heated to boiling, Separation of Solid and Liquid, it is that 40% calcium chloride water gathers to mix and obtains the 3rd mixture that the solid particle of obtaining joins mass concentration, the weight ratio of calcium chloride and zeolite nano molecular sieve is 1: 4;
The 3rd mixture is heated to 55 ℃, filters, drying obtains zeolite nano molecular sieve composite.
Embodiment 4
Get tamarind rubber powder 1000g, add pure water 5000ml mixing and stirring and obtain the 11 mixture;
In said the 11 mixture, add storng-acid cation exchange resin 1000g mixing and obtain the 12 mixture;
Said the 12 mixture is heated to boiling, Separation of Solid and Liquid, it is that 35% calcium chloride water gathers to mix and obtains the 3rd mixture that the solid particle of obtaining joins mass concentration, the weight ratio of calcium chloride and tamarind rubber powder is 1: 2;
The 13 mixture is heated to 55 ℃, filters, drying obtains the tamarind gum composite.
Embodiment 5
Get tamarind rubber powder 1000g, add pure water 4000ml mixing and stirring and obtain the 11 mixture;
In said the 11 mixture, add weak-acid cation-exchange resin 1200g mixing and obtain the 12 mixture;
Said the 12 mixture is heated to boiling, Separation of Solid and Liquid, it is that 30% calcium chloride water gathers to mix and obtains the 13 mixture that the solid particle of obtaining joins mass concentration, the weight ratio of calcium chloride and tamarind rubber powder is 1: 3;
The 13 mixture is heated to 50 ℃, filters, drying obtains the tamarind gum composite.
Embodiment 6
Get tamarind rubber powder 1000g, add pure water 5500ml mixing and stirring and obtain the 11 mixture;
In said the 11 mixture, add by 600g highly acid oxonium ion exchanger resin and the mixing of 600g weak-acid cation-exchange resin and obtain the 12 mixture;
Said second mixture is heated to boiling, Separation of Solid and Liquid, it is that 40% calcium chloride water gathers to mix and obtains the 13 mixture that the solid particle of obtaining joins mass concentration, the weight ratio of calcium chloride and tamarind rubber powder is 1: 4;
The 13 mixture is heated to 55 ℃, filters, drying obtains the tamarind gum composite.
Embodiment 7
The tamarind gum composite that the zeolite nano molecular sieve composite of getting 250g embodiment 1 preparation and 250g embodiment 4 prepare mixes and obtains filter medium; This filter medium is contained in the filter cylinder, and the delivery port place mat 25g active carbon fiber felt of filter cylinder obtains filter core.
Embodiment 8
The tamarind gum composite that the zeolite nano molecular sieve composite of getting 250g embodiment 1 preparation and 250g embodiment 5 prepare mixes and obtains filter medium; This filter medium is contained in the filter cylinder, and the delivery port place mat 25g active carbon fiber felt of filter cylinder obtains filter core.
Embodiment 9
The tamarind gum composite that the zeolite nano molecular sieve composite of getting 250g embodiment 1 preparation and 250g embodiment 6 prepare mixes and obtains filter medium; This filter medium is contained in the filter cylinder, and the delivery port place mat 25g active carbon fiber felt of filter cylinder obtains filter core.
Embodiment 10
The tamarind gum composite that the zeolite nano molecular sieve composite of getting 250g embodiment 2 preparation and 250g embodiment 4 prepare mixes and obtains filter medium; This filter medium is contained in the filter cylinder, and the delivery port place mat 25g active carbon fiber felt of filter cylinder obtains filter core.
Embodiment 11
The tamarind gum composite that the zeolite nano molecular sieve composite of getting 250g embodiment 3 preparation and 250g embodiment 5 prepare mixes and obtains filter medium; This filter medium is contained in the filter cylinder, and the delivery port place mat 25g active carbon fiber felt of filter cylinder obtains filter core.
Embodiment 12
The tamarind gum composite that the zeolite nano molecular sieve composite of getting 250g embodiment 3 preparation and 250g embodiment 6 prepare mixes and obtains filter medium; This filter medium is contained in the filter cylinder, and the delivery port place mat 25g active carbon fiber felt of filter cylinder obtains filter core.
The filter core that embodiment 8-embodiment 11 is obtained is handled different drinking water, and respectively to drinking water before filtration with filter after sodium content test, the result sees table 1.
Table 1 uses filter core to handle the sodium ions content in the water of front and back, unit: mg/L
Can find out that from table 1 sodium that utilizes filter core of the present invention to remove in the water has been obtained good effect, clearance has surpassed 90%.
More than the filter medium of sodium is removed in preparation provided by the present invention method, filter medium, filter core, purifier, water purifier carried out detailed introduction.Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (8)
1. filter medium that is used for removing drinking water sodium; It is characterized in that; Said filter medium comprises that weight ratio is zeolite nano molecular sieve composite and the tamarind gum composite of 1:4 ~ 4:1; Said zeolite nano molecular sieve composite is the zeolite nano molecular sieve to be loaded on cationic ion-exchange resin and the calcium chloride form, and said tamarind gum composite is tamarind gum to be loaded on cationic ion-exchange resin and the calcium chloride form;
Said zeolite nano molecular sieve composite is prepared by following method, comprising:
Get the mixed that the zeolite nano molecular sieve mixes with water according to 1:3 ~ 1:8 and obtain first mixture;
In said first mixture, add the cationic ion-exchange resin mixing and obtain second mixture;
Said second mixture is heated to boiling, Separation of Solid and Liquid, the solid particle of obtaining joins to mix in the calcium chloride water and obtains the 3rd mixture;
With said the 3rd mixture heating, to filter, drying obtains zeolite nano molecular sieve composite;
Said tamarind gum composite is prepared by following method, comprising:
Getting the tamarind rubber powder mixes with water to mix according to the weight ratio of 1:3 ~ 1:8 and obtains the 11 mixture;
In said the 11 mixture, add the cationic ion-exchange resin mixing and obtain the 12 mixture;
Said the 12 mixture is heated to boiling, Separation of Solid and Liquid, the solid particle of obtaining joins to mix in the calcium chloride water and obtains the 13 mixture;
With said the 13 mixture heating, to filter, drying obtains the tamarind gum composite.
2. filter medium according to claim 1 is characterized in that, the zeolite nano molecular sieve composite in the said filter medium and the weight ratio of tamarind gum composite are 1:2 ~ 2:1.
3. filter medium according to claim 1 is characterized in that, the zeolite nano molecular sieve in the said zeolite nano molecular sieve composite and the weight ratio of cationic ion-exchange resin are 1:2 ~ 2:1.
4. filter medium according to claim 1 is characterized in that, the tamarind in the said tamarind gum composite and the weight ratio of cationic ion-exchange resin are 1:2 ~ 2:1.
5. filter medium according to claim 1 is characterized in that, the cationic ion-exchange resin in the said filter medium is storng-acid cation exchange resin and/or weak-acid cation-exchange resin.
6. filter core; It is characterized in that, comprise filter cylinder, each described filter medium of claim 1 to 5 is housed in said filter cylinder; The delivery port place place mat of said filter cylinder has the NACF felt, and the weight ratio of said filter medium and said active carbon fiber felt is 40 ~ 60:2 ~ 3.
7. a purifier is characterized in that, comprises the described filter core of claim 6.
8. a water dispenser is characterized in that, comprises the described purifier of claim 7.
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| CN101125269A (en) * | 2007-07-03 | 2008-02-20 | 奇迪电器集团有限公司 | Filtering medium used for eliminating iron ions in water and preparation method thereof and filter element made of the filtering medium |
| CN101254966A (en) * | 2008-04-14 | 2008-09-03 | 北京特斯顿新材料技术发展有限公司 | Recovery method of phosphate discharge liquid |
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| CN101125269A (en) * | 2007-07-03 | 2008-02-20 | 奇迪电器集团有限公司 | Filtering medium used for eliminating iron ions in water and preparation method thereof and filter element made of the filtering medium |
| CN101254966A (en) * | 2008-04-14 | 2008-09-03 | 北京特斯顿新材料技术发展有限公司 | Recovery method of phosphate discharge liquid |
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