CN113880153A - Preparation method of filter element with heavy metal adsorption performance - Google Patents
Preparation method of filter element with heavy metal adsorption performance Download PDFInfo
- Publication number
- CN113880153A CN113880153A CN202111126718.1A CN202111126718A CN113880153A CN 113880153 A CN113880153 A CN 113880153A CN 202111126718 A CN202111126718 A CN 202111126718A CN 113880153 A CN113880153 A CN 113880153A
- Authority
- CN
- China
- Prior art keywords
- filter element
- raw material
- screw rod
- heavy metal
- metal adsorption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
A preparation method of a filter element with heavy metal adsorption performance is characterized by comprising the following steps: firstly, preparing a substrate filter element by using melt-blowing equipment, wherein two nozzles are needed in the melt-blowing process, one nozzle sprays a first raw material, the other nozzle sprays a second raw material, the two nozzles spray towards a screw rod from two directions, so that the sprayed two raw material fibers are received by the screw rod and are cut to form the substrate filter element, and the first raw material is used for adhering fibers on the screw rod so as to enable the second raw material fibers without adhesive force with the screw rod to rotate along with the screw rod to form the filter element; secondly, putting the substrate filter element into a reaction solution containing heavy metal adsorption for post-treatment; and thirdly, washing and drying the reacted filter element to obtain the filter element with heavy metal adsorption performance. Compared with the prior art, the invention has the advantages of large raw material selection scope, stable adsorption and the like.
Description
Technical Field
The invention relates to a preparation method of a water treatment filter element, in particular to a preparation method of a filter element capable of adsorbing heavy metals.
Background
At present, the filtering materials for removing heavy metals mainly comprise the following types: fibers, resins, separation membranes and activated carbon, such as chelate fibers, or other fiber-based filter materials; the resin modified ion exchange resin has a certain function of removing heavy metals; the separation membranes are prepared by introducing an adsorbent to the surface of a separation membrane (such as a hollow fiber membrane) in a phase inversion mode, so that the function of removing heavy metals is realized. The activated carbon realizes the function of removing heavy metal by reforming carbon powder or introducing an adsorbent in the sintering process.
The application number 201810869708.9 of the Chinese invention patent discloses a preparation method of a polypropylene-based adsorption material modified by polydopamine (publication number: CN108906003A), the application adopts dopamine to coat the surface of the polypropylene-based adsorption material, and then other adsorbents are grafted.
Chinese patent application No. 201510067994.3 discloses a preparation method of a chelate fiber material for adsorbing heavy metals in water (publication No. CN104667891A), which utilizes a plasma technology to graft active groups on the surface of polypropylene fibers, and then grafts an adsorbent on the surface of the fibers through the active groups to realize the function of removing the heavy metals. The method has multiple steps and complex process, and the uniformity and the stability of the active groups grafted by the plasma technology are poor.
At present, the following problems generally exist in the existing heavy metal removal materials: firstly, the preparation process is complex and the cost is high: firstly, preparing fiber, membrane wire or ion exchange resin, and then preparing a filter element, wherein the process is complex, the links are many, and the yield is low; secondly, a large amount of organic solvent is used in the material preparation process, and a large amount of organic waste liquid and waste gas can be generated to pollute the environment; thirdly, the active carbon and the adsorbent are mainly combined by physical bonds, the combining ability is weak, the problem of adsorbent loss exists, and the risk exists in the performance stability of the filter element.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method for preparing a filter element with wide choice of raw materials and heavy metal adsorption performance in view of the above technical current situation.
The technical scheme adopted by the invention for solving the technical problems is as follows: a preparation method of a filter element with heavy metal adsorption performance is characterized by comprising the following steps:
firstly, preparing a substrate filter element by using melt-blowing equipment, wherein two nozzles are needed in the melt-blowing process, one nozzle sprays a first raw material, the other nozzle sprays a second raw material, the two nozzles spray towards a screw rod from two directions, so that the sprayed two raw material fibers are received by the screw rod and are cut to form the substrate filter element, and the first raw material is used for adhering fibers on the screw rod so as to enable the second raw material fibers without adhesive force with the screw rod to rotate along with the screw rod to form the filter element;
secondly, putting the substrate filter element into a reaction solution containing heavy metal adsorption for post-treatment;
and thirdly, washing and drying the reacted filter element to obtain the filter element with heavy metal adsorption performance.
The first raw material in the step I is one or more of Polysulfone (PSF), Polyethersulfone (PES), polypropylene (PP), Polystyrene (PS), polyvinyl chloride (PVC), polyvinylidene fluoride (PVDF), styrene-propylene copolymer and styrene-maleic anhydride copolymer; the raw material 2 is at least one of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), Polyimide (PI), Polyetherimide (PEI) and Polyamideimide (PAI). Wherein the first raw material is preferably polypropylene or polystyrene; the second raw material is preferably polyethylene terephthalate or polybutylene terephthalate.
Preferably, the weight ratio of the first raw material to the second raw material is 3: 7-7: 3.
Preferably, the reaction solution in the step II is an aqueous solution, the concentration of the solution is 0.1-10 wt%, the reaction time is 0.5-24 h, and the reaction temperature is 50-100 ℃.
Preferably, the heavy metal adsorbent in step (c) is at least one of chitosan, N-carboxymethyl chitosan, ethylenediamine, polyethyleneimine, polyacrylamide, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, polyvinylimidazole, nitrilotriacetic acid, ethylenediaminetetraacetic acid, tannic acid, catechol, phloroglucinol, and phytic acid. Preferably chitosan, ethylenediamine tetraacetic acid, nitrilotriacetic acid, tannic acid, pentaethylenehexamine.
Preferably, the filter element washing conditions are as follows: the pure water washing time is 0.5-6 h, the temperature of the pure water is 20-60 ℃, and the drying conditions are as follows: the drying temperature is 40-90 ℃, and the drying time is 6-72 h.
Compared with the prior art, the invention has the advantages that: the two raw materials are mixed and sprayed, the first raw material is used for adhering fibers to the screw rod, so that the fibers and the second raw material fibers which do not have the adhesive force with the screw rod rotate together with the screw rod to form the filter element, and thus, functional materials with low adhesive force can be made into the filter element through melt-blowing, and the selection scope of the raw materials is greatly increased. Through the mixed spraying mode, the functional fibers are uniformly distributed in the filter element, and through the integral soaking reaction mode, the adsorbent can be uniformly distributed on the surface of the material, so that the heavy metal removal effect of the filter element is efficient and stable; the inner surface of the melt-blown filter element fiber is used as an adsorption site, so that the adsorption surface area is large and the adsorption capacity is large; the adsorbent is connected through chemical bonds, so that the adsorbent is more stable and has longer service life; low cost, simple process and easy realization of large-scale production.
On a melt-blown filter element substrate prepared from an active material, a filter element with a heavy metal removing function is directly prepared by a one-step method, and the method is quick and convenient, simple in process and low in cost, and is easy to realize large-scale production; the adsorbent is grafted on the fiber surface of the filter element through direct reaction, the adsorbent is firmly combined on the surface interface of the filter element, and the filter element has a plurality of adsorption sites inside and large heavy metal adsorption capacity, so that the removal effect of the filter element is efficient and stable, and the service life of the filter element is long; the adsorbent solution in the filter element preparation process can be recycled, the production cost is reduced, the waste liquid discharge is reduced, and the filter element is more environment-friendly.
Drawings
FIG. 1 is a schematic structural diagram of the melt blowing process of example 1.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
Example 1:
(1) the first raw material is polypropylene, the second raw material is polyethylene glycol terephthalate, melt-blowing is carried out, the discharging speed of the first raw material and the second raw material is controlled to be 4:6, and the substrate filter element is prepared; the schematic structure of melt-blowing is shown in fig. 1, a nozzle 1 sprays a first raw material 11 onto a screw 3, and a nozzle 2 sprays a second raw material 21 onto the screw 3.
(2) Putting the substrate filter element into a 5% ethylene diamine tetraacetic acid aqueous solution, and reacting for 5h at 90 ℃;
(3) taking out the reacted filter element, washing the reacted filter element in pure water for 5 hours at the temperature of 20 ℃, then putting the filter element into a drying oven for 60 ℃, and drying for 24 hours to obtain the filter element with heavy metal adsorption performance;
(4) heavy metal adsorption performance test is carried out on the filter element, and 25ppb of Cd (NO)3)2The solution is used as a labeling solution, and Cd (NO) in the solution permeating the filter element3)2If the concentration of the solution is more than 5ppb, the test is stopped, and the water amount of the standard solution added to the filter element is 800L finally.
Example 2:
(1) the first raw material is polystyrene, the second raw material is polybutylene terephthalate, melt-blowing is carried out, the discharging speed of the first raw material and the discharging speed of the second raw material are controlled to be 6:4, and the substrate filter element is prepared;
(2) putting the substrate filter element into a 3% pentaethylenehexamine aqueous solution, and reacting for 4h at 70 ℃;
(3) taking out the reacted filter element, washing the reacted filter element in pure water for 3 hours at the temperature of 40 ℃, then putting the filter element into a drying oven for 70 ℃, and drying for 20 hours to obtain the filter element with heavy metal adsorption performance;
(4) heavy metal adsorption performance test is carried out on the filter element, and 25ppb of Cd (NO)3)2The solution is used as a labeling solution, and Cd (NO) in the solution permeating the filter element3)2If the concentration of the solution is more than 5ppb, the test is stopped, and finally the water amount of the standard solution added to the filter element is 500L.
Example 3:
(1) the first raw material is polypropylene, the second raw material is polybutylene terephthalate, melt-blowing is carried out, the discharging speed of the first raw material and the discharging speed of the second raw material are controlled to be 3:7, and the substrate filter element is prepared;
(2) putting the substrate filter element into 0.5% chitosan water solution, and reacting for 12h at 80 ℃;
(3) taking out the reacted filter element, washing the reacted filter element in pure water for 2 hours at the temperature of 50 ℃, then putting the filter element into a drying oven for 80 ℃, and drying for 15 hours to obtain the filter element with heavy metal adsorption performance;
(4) heavy metal adsorption performance test is carried out on the filter element, and 25ppb of Cd (NO)3)2The solution is used as a labeling solution, and Cd (NO) in the solution permeating the filter element3)2If the concentration of the solution is more than 5ppb, the test is stopped, and the water amount of the over-added standard solution of the filter element is 1900L finally.
Example 4:
(1) the first raw material is polystyrene, the second raw material is polyethylene terephthalate, melt-blowing is carried out, the discharging speed of the first raw material and the second raw material is controlled to be 5:5, and the substrate filter element is prepared;
(2) putting the substrate filter element into 8% chitosan water solution, and reacting for 8h at 90 ℃;
(3) taking out the reacted filter element, washing the reacted filter element in pure water for 4 hours at the temperature of 35 ℃, then putting the filter element into a drying oven for 60 ℃, and drying for 50 hours to obtain the filter element with heavy metal adsorption performance;
(4) heavy metal adsorption performance test is carried out on the filter element, and 25ppb of Cd (NO)3)2The solution is used as a labeling solution when permeatingIn solution in the filter element, Cd (NO)3)2If the concentration of the solution is more than 5ppb, the test is stopped, and the water amount of the over-added standard solution of the filter element is 1300L finally.
Claims (6)
1. A preparation method of a filter element with heavy metal adsorption performance is characterized by comprising the following steps:
firstly, preparing a substrate filter element by using melt-blowing equipment, wherein two nozzles are needed in the melt-blowing process, one nozzle sprays a first raw material, the other nozzle sprays a second raw material, the two nozzles spray towards a screw rod from two directions, so that the sprayed two raw material fibers are received by the screw rod and are cut to form the substrate filter element, and the first raw material is used for adhering fibers on the screw rod so as to enable the second raw material fibers without adhesive force with the screw rod to rotate along with the screw rod to form the filter element;
secondly, putting the substrate filter element into a reaction solution containing heavy metal adsorption for post-treatment;
and thirdly, washing and drying the reacted filter element to obtain the filter element with heavy metal adsorption performance.
2. The preparation method according to claim 1, wherein the first raw material in the step (r) is at least one of polysulfone, polyethersulfone, polypropylene, polystyrene, polyvinyl chloride, polyvinylidene fluoride, styrene-propylene copolymer, and styrene-maleic anhydride copolymer;
the second raw material is at least one of polyethylene terephthalate, polybutylene terephthalate, polyimide, polyetherimide and polyamide-imide.
3. The preparation method according to claim 1 or 2, wherein the weight ratio of the first raw material to the second raw material is 3:7 to 7: 3.
4. The preparation method according to claim 1, wherein the reaction solution in the step (II) is an aqueous solution, the concentration of the solution is 0.1-10% wt, the reaction time is 0.5-24 h, and the reaction temperature is 50-100 ℃.
5. The method according to claim 4, wherein the heavy metal adsorbent is at least one selected from chitosan, N-carboxymethyl chitosan, ethylenediamine, polyethyleneimine, polyacrylamide, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, polyvinylimidazole, nitrilotriacetic acid, ethylenediaminetetraacetic acid, tannic acid, catechol, phloroglucinol, and phytic acid.
6. The method according to claim 1, wherein the flushing conditions of the filter element in step (c) are as follows: the pure water washing time is 0.5-6 h, the temperature of the pure water is 20-60 ℃, and the drying conditions are as follows: the drying temperature is 40-90 ℃, and the drying time is 6-72 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111126718.1A CN113880153A (en) | 2021-09-26 | 2021-09-26 | Preparation method of filter element with heavy metal adsorption performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111126718.1A CN113880153A (en) | 2021-09-26 | 2021-09-26 | Preparation method of filter element with heavy metal adsorption performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113880153A true CN113880153A (en) | 2022-01-04 |
Family
ID=79006703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111126718.1A Pending CN113880153A (en) | 2021-09-26 | 2021-09-26 | Preparation method of filter element with heavy metal adsorption performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113880153A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW442393B (en) * | 1998-11-24 | 2001-06-23 | Filtteck Co Ltd | Manufacture of multi-layer composite filtering core and its products |
| US20040112511A1 (en) * | 2000-07-28 | 2004-06-17 | Morgan H. William | Method of forming an impregnated micro-fiber filtration unit |
| CN102582144A (en) * | 2012-01-20 | 2012-07-18 | 东华大学 | Composite melt-blown filter core material filled with feather fiber, and preparation device and method thereof |
| CN105948159A (en) * | 2016-06-07 | 2016-09-21 | 中国科学院新疆理化技术研究所 | Manufacturing method for heavy metal adsorption filter element |
| CN109692577A (en) * | 2017-10-20 | 2019-04-30 | 宁波方太厨具有限公司 | The cross-linking modified preparation method of total coating of hollow fiber ultrafiltration membrane |
-
2021
- 2021-09-26 CN CN202111126718.1A patent/CN113880153A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW442393B (en) * | 1998-11-24 | 2001-06-23 | Filtteck Co Ltd | Manufacture of multi-layer composite filtering core and its products |
| US20040112511A1 (en) * | 2000-07-28 | 2004-06-17 | Morgan H. William | Method of forming an impregnated micro-fiber filtration unit |
| CN102582144A (en) * | 2012-01-20 | 2012-07-18 | 东华大学 | Composite melt-blown filter core material filled with feather fiber, and preparation device and method thereof |
| CN105948159A (en) * | 2016-06-07 | 2016-09-21 | 中国科学院新疆理化技术研究所 | Manufacturing method for heavy metal adsorption filter element |
| CN109692577A (en) * | 2017-10-20 | 2019-04-30 | 宁波方太厨具有限公司 | The cross-linking modified preparation method of total coating of hollow fiber ultrafiltration membrane |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101068958B (en) | Functional porous multilayer fibre and its preparation | |
| CN102139187B (en) | Hyperfiltration membrane or nanofiltration membrane with multi-layered composite structure and preparation method thereof | |
| JP2019508247A (en) | Stable facilitated transport membrane for olefin / paraffin separation | |
| CN111471033B (en) | Device and method for preparing cyclic carbonate by integrating absorption separation and catalytic reaction | |
| KR20140077001A (en) | Method of Introducing Functionalities on Surface of Hollow Fiber Membrane By Electro-spraying When Preparing the Membrane | |
| CN102824859B (en) | Method for preparing hollow fiber nanofiltration membrane by using thermally induced phase separation/interface cross linking synchronization method | |
| KR101494053B1 (en) | Method for manufacturing asymmetric hollow fiber membrane and asymmetric hollow fiber membrane manufactured using the same | |
| CN111286068B (en) | Method for preparing hydrophilic-hydrophobic composite membrane by grafting zwitterion on surface | |
| CN113880180A (en) | Preparation method of folding filter element capable of removing heavy metal | |
| CN104548952A (en) | Preparation method of antibacterial compound nanofiltration film | |
| Chen et al. | Functionalization of biodegradable PLA nonwoven fabrics as super-wetting membranes for simultaneous efficient dye and oil/water separation | |
| CN108654406B (en) | M in filtering water3+Nano fiber membrane material and its preparation method | |
| JP2017136546A (en) | Carbon dioxide separation membrane and production method of the same | |
| CN113880153A (en) | Preparation method of filter element with heavy metal adsorption performance | |
| CN102580563A (en) | Separation CO2 composite membrane prepared from micromolecule amine modification polyvinylamine and preparation | |
| CN108479432B (en) | Preparation method of hydrophilic phenolphthalein polyether sulfone composite nanofiber ultrafiltration membrane | |
| CN103611430A (en) | Production method for high-ion selectivity hollow fibrous nanofiltration membrane | |
| CN113880181B (en) | Preparation method of filter element capable of removing heavy metals | |
| CN109304101B (en) | Zwitterionic high-strength pollution-resistant forward osmosis membrane and preparation method thereof | |
| CN116212651A (en) | Super-hydrophilic ultrafiltration porous membrane and preparation method thereof | |
| CN110694476A (en) | Composite nanofiltration membrane and preparation method thereof | |
| CN110523297A (en) | A kind of graphene oxide composite nano filter membrane and preparation method thereof | |
| JP2521884B2 (en) | Method for manufacturing plasma-treated film | |
| CN113880182A (en) | Preparation method of modified activated carbon filter element | |
| CN110201559B (en) | Large-flux reinforced hollow fiber membrane and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |