CN102527154A - Structural filter element used for removing silver in drinking water and preparation method thereof - Google Patents
Structural filter element used for removing silver in drinking water and preparation method thereof Download PDFInfo
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- CN102527154A CN102527154A CN2011103207626A CN201110320762A CN102527154A CN 102527154 A CN102527154 A CN 102527154A CN 2011103207626 A CN2011103207626 A CN 2011103207626A CN 201110320762 A CN201110320762 A CN 201110320762A CN 102527154 A CN102527154 A CN 102527154A
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- Prior art keywords
- drinking water
- filter core
- silver
- preparation
- ira
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- 229910052709 silver Inorganic materials 0.000 title claims abstract description 37
- 239000004332 silver Substances 0.000 title claims abstract description 37
- 239000003651 drinking water Substances 0.000 title claims abstract description 36
- 235000020188 drinking water Nutrition 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 22
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000003456 ion exchange resin Substances 0.000 claims abstract description 19
- 229920003303 ion-exchange polymer Polymers 0.000 claims abstract description 19
- 229960000892 attapulgite Drugs 0.000 claims abstract description 11
- 229910052625 palygorskite Inorganic materials 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 20
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 20
- 239000002994 raw material Substances 0.000 claims description 17
- -1 phenyl ring acid amides Chemical class 0.000 claims description 15
- 238000001354 calcination Methods 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract 2
- 239000004809 Teflon Substances 0.000 abstract 1
- 229920006362 Teflon® Polymers 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 1
- 239000011148 porous material Substances 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000002384 drinking water standard Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000011549 displacement method Methods 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Substances [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 235000009518 sodium iodide Nutrition 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a structural filter element used for removing silver in drinking water and a preparation method thereof and belongs to the technical field of drinking water purification and treatment. The preparation method comprises the following steps: mixing and evenly stirring Teflon, attapulgite powder, activated carbon fiber powder and benzsulfamide according to a formula amount; putting the mixture into a tubular die; and after the mixture is sintered and formed, adding IRA ion exchange resin at a corresponding ratio into an inner pore. The structural filter element can be used for cleanly and efficiently removing the silver in the drinking water, and the damage on a human body by the silver is effectively prevented so as to protect the health of the human body. The test proves that the silver in the drinking water can stably achieve the standard of the drinking water after the structural filter element disclosed by the invention is adopted.
Description
Technical field
The present invention is a kind of filter core of removing silver in the drinking water and preparation method thereof, relates to the removal of silver in the drinking water, belongs to technical filed of drinking water purifying treatment.
Background technology
Silver is the hypertoxic heavy metal that extensively is present in nature and is prone to absorbed by aquatile; Its toxicity less than mercury greater than copper, cadmium, zinc, lead, chromium, nickel, cobalt; But be not much accounted of for a long time because of content in water body is very little; In recent years, along with the further investigation of researcher to the environment heavy metal, silver has caused people's attention gradually.Silver-colored and silver-colored Related product is widely used in fields such as electronics, plating, photosensitive material, chemical engineering industry; Thereby the silver-containing liquid waste that various industrial activity produced is discharged in the environment more or less; Especially get into water body, absorbed, after amplifying through food chain is biological by aquatile; Getting in the human body, is immeasurable to the potential hazard of human body.Therefore, national drinking water standard has been done clear and definite restriction to it, and its limit value is 50 μ g/L.
Existing desilver technology mainly contains the precipitation method, electrolysis, displacement method, ion-exchange and absorption method, and is mainly used in desilver in the waste water, the domestic patent of still not having desilver in the drinking water.The precipitation method mainly are to utilize sulfide or chloride to make the silver deposition, and water middle and high concentration silver is reduced rapidly, are difficult to reach drinking water standard but handle the degree of depth.Electrolysis is used for waste fixer solution and silver plating liquid more, does not introduce impurity, but under low concentration silver bar spare, can't carry out, and obviously can't be used for the drinking water desilver.Displacement method is to make its reduce deposition through reducing agent displacement desilver, but for trace silver in the drinking water, its treatment effect is obviously bad, and is prone to cause secondary pollution.Ion-exchange and absorption method, the inventor thinks that nontoxic exchanger with good exchange adsorption capacity and adsorbent can attempt being applied to the drinking water desilver.
Notification number is that CN100390310C discloses a kind of method that from low argentiferous industrial wastewater, reclaims silver, and it discloses two sets of plan, and technical characterictic is: utilize lead button, iodized salt, vulcanized sodium precipitated silver; Second sets of plan is for utilizing KI or sodium iodide, sodium sulfite, vulcanized sodium precipitated silver.The former is fit to handle the argentiferous water of 8～40mg/L, and the latter is fit to handle the argentiferous water of 40～270mg/L.Obviously, these two kinds of schemes all can not be applied in the drinking water.
Summary of the invention
The present invention is not suitable for being applied under the situation of drinking water in existing desilver technology, for realizing drink water purifying, improves water quality, especially removes silver development and Design in the drinking water for efficient.
The purpose of this invention is to provide a kind of filter core of removing silver in the drinking water and preparation method thereof.
The objective of the invention is to realize through following technical scheme:
A kind of filter core of removing silver in the drinking water, the mass percent of each raw material is respectively:
210 purpose attapulgite powder, 10%～20% NACF powder 10%～15%
IRA ion exchange resin 20%～45% phenyl ring acid amides 1%～10%
The polytetrafluoroethylene (PTFE) 41%～50% of 1,500 ten thousand～1,700 ten thousand molecular weight.
Preferably, a kind of filter core of removing silver in the drinking water, the mass percent of each raw material is respectively:
210 purpose attapulgite powder, 15%～20% NACF powder 10%～13%
IRA ion exchange resin 20%～30% benzsulfamide 1%～5%
The polytetrafluoroethylene (PTFE) 41%～45% of 1,500 ten thousand～1,700 ten thousand molecular weight.
More preferably, a kind of filter core of removing silver in the drinking water, the mass percent of each raw material is respectively:
210 purpose attapulgite powder, 18% NACF powder 12%
IRA ion exchange resin 25% benzsulfamide 2%
The polytetrafluoroethylene (PTFE) 43% of 1,500 ten thousand～1,700 ten thousand molecular weight.
Attapulgite powder of the present invention has the good adsorption performance, can effectively adsorb the silver in the drinking water.
NACF powder of the present invention is the impurity in the adsorbed water efficiently, and silver is had the good adsorption ability, and its order number is 150～270 orders.
Polytetrafluoroethylene (PTFE) of the present invention has the effect of powerful Electrostatic Absorption, can capture trickle, superfine particle that microfiltration can not be considered resistance, and its order number is 80～120 orders.
IRA ion exchange resin of the present invention has higher exchange capacity, and silver is had good selectivity, can effectively remove the silver in the drinking water.
A kind of filter core of removing silver in the drinking water of the present invention and preparation method thereof, it may further comprise the steps:
(1) takes by weighing each raw material by formula ratio; Earlier that IRA ion exchange resin is subsequent use, after all the other each raw material mixing and stirring, place tubular die; 500 ℃～800 ℃ calcining moulding down; Calcination time is 110～300 minutes, is cooled to the demoulding after the room temperature, promptly becomes the porous tubular structured filter core with regulation wall thickness and height;
(2) serve as a contrast two-layer gauze to this naked filter core endoporus; The skin gauze of double-baging; Wrap polyethylene porous net at skin again, the end cap of atresia on filter core one end is bonding then keeps flat the permeable gauze of one deck in again from the filter core other end toward endoporus; Then in endoporus, insert the IRA ion exchange resin in (1), on resin, keep flat the permeable gauze of one deck again; At last at the filter core bonding end cap that centre bore is arranged of an end of cohesive end lid not.During use, with the filter core that is stained with porose end cap one end up, place again in the carrier of stainless steel or plastic casing and other any corresponding sizes, get final product.
Raw material sources of the present invention are extensive, and are cheap, and manufacturing process is simple, are prone to realize suitability for industrialized production, and clean and effective is removed the silver in the drinking water, effectively prevented the harm that silver causes human body, especially are fit to the home terminal drinking water treatment.
The specific embodiment
Below in conjunction with instance the present invention is described in further detail.
Instance 1
210 purpose attapulgite powder, 18% NACF powder 12% (240 order)
IRA ion exchange resin 25% benzsulfamide 2%
The polytetrafluoroethylene (PTFE) 43% of 1,500 ten thousand molecular weight (100 order)
Its preparation method is following:
(1) takes by weighing each raw material by formula ratio; Earlier that IRA ion exchange resin is subsequent use, after all the other each raw material mixing and stirring, place tubular die; 600 ℃ of calcining moulding down; Calcination time is 170 minutes, is cooled to the demoulding after the room temperature, promptly becomes the porous tubular structured filter core with regulation wall thickness and height;
(2) serve as a contrast two-layer gauze to this naked filter core endoporus; The skin gauze of double-baging; Wrap polyethylene porous net at skin again, the end cap of atresia on filter core one end is bonding then keeps flat the permeable gauze of one deck in again from the filter core other end toward endoporus; Then in endoporus, insert the IRA ion exchange resin in (1), on resin, keep flat the permeable gauze of one deck again; At last at the filter core bonding end cap that centre bore is arranged of an end of cohesive end lid not.
Instance 2
210 purpose attapulgite powder, 10% NACF powder 10% (200 order)
IRA ion exchange resin 38% benzsulfamide 1%
The polytetrafluoroethylene (PTFE) 41% of 1,600 ten thousand molecular weight (80 order)
Its preparation method is following:
Take by weighing each raw material by formula ratio; Earlier that IRA ion exchange resin is subsequent use, after all the other each raw material mixing and stirring, place tubular die; 550 ℃ of calcining moulding down; Calcination time is 200 minutes, is cooled to the demoulding after the room temperature, promptly becomes the porous tubular structured filter core with regulation wall thickness and height; All the other steps are identical with instance 1.
Instance 3
210 purpose attapulgite powder, 20% NACF powder 10% (170 order)
IRA ion exchange resin 20% benzsulfamide 5%
The polytetrafluoroethylene (PTFE) 45% of 1,700 ten thousand molecular weight (120 order)
Its preparation method is following:
Take by weighing each raw material by formula ratio; Earlier that IRA ion exchange resin is subsequent use, after all the other each raw material mixing and stirring, place tubular die; 600 ℃ of calcining moulding down; Calcination time is 170 minutes, is cooled to the demoulding after the room temperature, promptly becomes the porous tubular structured filter core with regulation wall thickness and height; All the other steps are identical with instance 1.
Instance 4
Get the tubular structure filter core 1,2,3 of the many minute apertures of instance 1-3 gained; With the filter core that is stained with porose end cap one end up; Place again in the carrier of stainless steel or plastic casing and other any corresponding sizes, be used for Drinking Water, through detecting; This filter core is good, as shown in table 1 to the removal effect of the silver in the drinking water.The needs that are fit to very much the home terminal drinking water treatment.
Table 1 uses filter core to handle the water of front and back, and method of testing adopts GB/T 5750-2006 unit: μ g/L
Can find out from table 1, utilize filter core Drinking Water of the present invention after, the silver in the drinking water is far below drinking water standard limit value 50 μ g/L, explains that the silver that filter core of the present invention is removed in the drinking water obtained good effect.
Claims (4)
1. remove filter core silver-colored in the drinking water and preparation method thereof for one kind, it is characterized in that the mass percent of each raw material is respectively:
210 purpose attapulgite powder, 10%～20% NACF powder 10%～15%
IRA ion exchange resin 20%～45% phenyl ring acid amides 1%～10%
The polytetrafluoroethylene (PTFE) 41%～50% of 1,500 ten thousand～1,700 ten thousand molecular weight.
2. a kind of filter core of removing silver in the drinking water according to claim 1 and preparation method thereof is characterized in that the mass percent of each raw material is respectively:
210 purpose attapulgite powder, 15%～20% NACF powder 10%～13%
IRA ion exchange resin 20%～30% benzsulfamide 1%～5%
The polytetrafluoroethylene (PTFE) 41%～45% of 1,500 ten thousand～1,700 ten thousand molecular weight.
3. a kind of filter core of removing silver in the drinking water according to claim 2 and preparation method thereof is characterized in that the mass percent of each raw material is respectively:
210 purpose attapulgite powder, 18% NACF powder 12%
IRA ion exchange resin 25% benzsulfamide 2%
The polytetrafluoroethylene (PTFE) 43% of 1,500 ten thousand～1,700 ten thousand molecular weight.
4. a kind of filter core of removing silver in the drinking water according to claim 1 and preparation method thereof is characterized in that the preparation method is:
(1) takes by weighing each raw material by formula ratio; Earlier that IRA ion exchange resin is subsequent use, after all the other each raw material mixing and stirring, place tubular die; 500 ℃～800 ℃ calcining moulding down; Calcination time is 110～300 minutes, is cooled to the demoulding after the room temperature, promptly becomes the porous tubular structured filter core with regulation wall thickness and height;
(2) serve as a contrast two-layer gauze to this naked filter core endoporus; The skin gauze of double-baging; Wrap polyethylene porous net at skin again, the end cap of atresia on filter core one end is bonding then keeps flat the permeable gauze of one deck in again from the filter core other end toward endoporus; Then in endoporus, insert the IRA ion exchange resin in (1), on resin, keep flat the permeable gauze of one deck again; At last at the filter core bonding end cap that centre bore is arranged of an end of cohesive end lid not.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103207626A CN102527154A (en) | 2011-10-20 | 2011-10-20 | Structural filter element used for removing silver in drinking water and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103207626A CN102527154A (en) | 2011-10-20 | 2011-10-20 | Structural filter element used for removing silver in drinking water and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102527154A true CN102527154A (en) | 2012-07-04 |
Family
ID=46335923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103207626A Pending CN102527154A (en) | 2011-10-20 | 2011-10-20 | Structural filter element used for removing silver in drinking water and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102527154A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731216A (en) * | 2017-01-23 | 2017-05-31 | 福建海西滤水龙头研究中心有限公司 | A kind of Multifunctional water purification filter core and preparation method thereof |
| CN110605094A (en) * | 2018-06-15 | 2019-12-24 | 清华大学 | Modification method to make activated carbon fiber water purification material hygienic and safe soaking pH up to standard |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101007228A (en) * | 2006-12-28 | 2007-08-01 | 北京佳康尔水处理技术有限公司 | Filter element structure for removing aluminum from drinking water and its preparation method |
| CN101747130A (en) * | 2008-12-11 | 2010-06-23 | 上海宝钢化工有限公司 | A method for refining coking benzene products containing nitrogen impurities |
| JP2011067790A (en) * | 2009-09-28 | 2011-04-07 | Sekisui Chem Co Ltd | Water treatment apparatus |
| CN102120651A (en) * | 2011-01-26 | 2011-07-13 | 昆山工研院华科生物高分子材料研究所有限公司 | Filter element used for sewage purification and sewage purification device with same |
-
2011
- 2011-10-20 CN CN2011103207626A patent/CN102527154A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101007228A (en) * | 2006-12-28 | 2007-08-01 | 北京佳康尔水处理技术有限公司 | Filter element structure for removing aluminum from drinking water and its preparation method |
| CN101747130A (en) * | 2008-12-11 | 2010-06-23 | 上海宝钢化工有限公司 | A method for refining coking benzene products containing nitrogen impurities |
| JP2011067790A (en) * | 2009-09-28 | 2011-04-07 | Sekisui Chem Co Ltd | Water treatment apparatus |
| CN102120651A (en) * | 2011-01-26 | 2011-07-13 | 昆山工研院华科生物高分子材料研究所有限公司 | Filter element used for sewage purification and sewage purification device with same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731216A (en) * | 2017-01-23 | 2017-05-31 | 福建海西滤水龙头研究中心有限公司 | A kind of Multifunctional water purification filter core and preparation method thereof |
| CN110605094A (en) * | 2018-06-15 | 2019-12-24 | 清华大学 | Modification method to make activated carbon fiber water purification material hygienic and safe soaking pH up to standard |
| CN110605094B (en) * | 2018-06-15 | 2021-06-18 | 清华大学 | Modification method for hygienic and safe soaking pH of activated carbon fiber water purification materials |
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Application publication date: 20120704 |