CN102527323A - Magnetic adsorbent and preparation method thereof - Google Patents
Magnetic adsorbent and preparation method thereof Download PDFInfo
- Publication number
- CN102527323A CN102527323A CN201010598663XA CN201010598663A CN102527323A CN 102527323 A CN102527323 A CN 102527323A CN 201010598663X A CN201010598663X A CN 201010598663XA CN 201010598663 A CN201010598663 A CN 201010598663A CN 102527323 A CN102527323 A CN 102527323A
- Authority
- CN
- China
- Prior art keywords
- adsorbate
- adsorption layer
- preparation
- mixed liquor
- carrier
- 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
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a magnetic adsorbent and a preparation method of the adsorbent. The adsorbent is prepared by the steps of preparing raw materials, blending, heating and stirring, stirring and drying, and forming an adsorbing layer; the adsorbent is formed by wrapping a carrier with an outer shell; and the outer shell is provided with the adsorbing layer with a covalent bonding amidogen functional group. According to the invention, after the adsorbent is completely reacted, an external magnetic field can be utilized to quickly recover the adsorbent, so as to achieve the purposes of shortening the time of treating heavy metal wastewater, reducing the cost of treating the heavy metal wastewater, avoiding causing the sludge treating problem and recovering valued metal in the heavy metal wastewater.
Description
Technical field
The present invention relates to be used to handle the adsorbent of heavy metal wastewater thereby, especially belong to a kind of preparation method of adsorbate and this adsorbate of tool magnetic.
Background technology
Industry such as general printed circuit board (PCB) manufacturing, Treatment of Metal Surface, plating and battery all can produce heavy metal wastewater thereby after processing; And these heavy metal wastewater therebies are as without suitable processing; Discharging arbitrarily; Will cause very serious destruction to ecological environment, therefore, general dealer can handle heavy metal wastewater thereby.
Traditional heavy metal containing wastewater treatment mode is main with coagulant sedimentation; This method causes the wastewater treatment expense height except medicament can't reclaim; Also can produce a large amount of harmful mud; Produce serious sludge treatment problem, and valuable metal can't reclaim in the heavy metal wastewater thereby, cause the generation of problems such as the wasting of resources and processing time be long.
Summary of the invention
The technical problem that the present invention will solve provides a kind of preparation method of adsorbate and this adsorbate of tool magnetic; Can shorten the time of heavy metal containing wastewater treatment; Reduce the cost of heavy metal containing wastewater treatment, avoid producing harmful mud, and reclaim the valuable metal in the heavy metal wastewater thereby.
For solving the problems of the technologies described above, the adsorbate of a kind of tool magnetic of the present invention, it includes: a carrier, it has magnetic; One shell, it is coated on outside the said carrier, and said housing exterior has an adsorption layer.
Preferable, said carrier is a tri-iron tetroxide.
Preferable, said shell is a silica.
Preferable, the adsorption layer of said shell has the amine functional base of covalent bond knot.
In addition, in order to reach aforementioned purpose, the present invention also provides a kind of preparation method of adsorbate of tool magnetic, and it comprises:
A) material preparation step, is second solution of 1～2 molarity NaOH and is the 3rd solution of 3～5 equivalent concentration sulfuric acid first solution of preparing to be mixed by distilled water and sodium metasilicate;
B) be in harmonious proportion step, get in the distilled water that carrier that 15～25 grams have magnetic adds 810～1350 milliliters and mix, and adding said second solution, to be in harmonious proportion out the pH value be first mixed liquor between 9.4 to 9.6;
C) heated and stirred step; Said first mixed liquor is heated; Add 90～150 milliliters first solution after 85 ℃～95 ℃ and stir when the temperature of first mixed liquor reaches, and adding said the 3rd solution, to be in harmonious proportion out the pH value be second mixed liquor between 6 to 7;
D) stirring and drying step stirs said second mixed liquor, and with alcohol and washed with de-ionized water second mixed liquor, making the pH value of second mixed liquor is 7 to 8, dries subsequently, and dried product is the adsorbate that a carrier is coated with a shell;
E) adsorption layer forming step is modified processing to the housing exterior of said adsorbate, makes housing exterior have an adsorption layer.
Preferable, at e) get the NaOH that the adsorbate and 1～2 of 8～12 grams restrains in the adsorption layer forming step, join in 400～600 milliliters the toluene; Feeding the reactant that adds 15～20 grams behind the nitrogen temperature to 95 ℃～110 ℃ reacts; And stir, after reacted adsorbate cleans 3～5 times with ethanol, clean to the pH value of distilled water with distilled water again and no longer change; At last adsorbate is put into the vacuum drying oven oven dry, make housing exterior have an adsorption layer.
Preferable, b) carrier in the mediation step is a tri-iron tetroxide.
Preferable, d) shell in the stirring and drying step is a silica.
Preferable, e) adsorption layer in the adsorption layer forming step is the amine functional base that has the covalent bond knot.
Preferable, c) mixing time of heated and stirred step is 30～60 minutes.
Preferable, d) mixing time of stirring and drying step is 30～60 minutes.
Preferable, d) bake out temperature of stirring and drying step is 95 ℃～110 ℃.
Preferable, e) bake out temperature in the adsorption layer forming step is 95 ℃～110 ℃.
Preferable, e) the reactant molecular formula in the adsorption layer forming step is C
8H
22N
2O
3Si.
The present invention drops into heavy metal wastewater thereby after reaction is accomplished through the adsorbate of idiographic flow preparation, utilizes externally-applied magnetic field just can reclaim each adsorbate immediately fast, has quickened the speed of water quality purifying like this, has shortened the heavy metal containing wastewater treatment time; But adsorbate has reduced the heavy metal containing wastewater treatment cost through just reusing after purifying and recovering and the purifying and recovering behind the suitable program desorption; Adsorbate with and on heavy metal be recovered and reduced reacted mud and produce and discharging, avoided the sludge treatment problem; Heavy metal on the adsorbate can break away from recovery through proper procedure.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further detailed explanation:
Fig. 1 is a part sectioned view of the present invention, shows the part section state of adsorbate;
Fig. 2 is that the copper metallic wastewater carries out optimal adsorption reaction pH value resolution chart;
The tri-iron tetroxide that Fig. 3 is adsorbate and tri-iron tetroxide, be coated with silicon oxide carries out adsorption reaction to the copper metallic wastewater resolution chart;
Fig. 4 is preparation flow figure of the present invention;
The tri-iron tetroxide that Fig. 5 is adsorbate and tri-iron tetroxide, be coated with silicon oxide carries out adsorption reaction to waste water from dyestuff resolution chart.
Wherein description of reference numerals is following:
Adsorbate 31 tri-iron tetroxides 32
Tri-iron tetroxide 33 tri-iron tetroxides 34 that are coated with silicon oxide
The tri-iron tetroxide 35 that is coated with silicon oxide
Heated and stirred step 53 stirring and drying step 54
Adsorption layer forming step 55
The specific embodiment
Consult Fig. 1, the adsorbate of a kind of tool magnetic that the embodiment of the invention provides, it is mainly coated by a shell 20 by a carrier 10 and forms, wherein:
The above is the structure explanation of embodiment of the invention adsorbate.In view of the above, the adsorbate of tool magnetic provided by the present invention has following effect at least.
One of which has shortened time of heavy metal containing wastewater treatment.Because the carrier 10 of adsorbate has magnetic; And shell 20 has the adsorption layer 21 that combines strongly with copper ion, therefore, and when a plurality of adsorbates drop into heavy metal wastewater thereby after reaction is accomplished; Only need utilize externally-applied magnetic field; Just can reclaim each adsorbate immediately fast, can quicken the speed of water quality purifying like this, reach the purpose that shortens the heavy metal containing wastewater treatment time.
Its two, reduce the cost of heavy metal containing wastewater treatment.Because adsorbate is after reaction is accomplished; Utilize externally-applied magnetic field to reclaim fast, therefore, be adsorbed with each adsorbate of copper ion; But, reach the purpose that reduces the heavy metal containing wastewater treatment cost thus through just reusing after purifying and recovering and the purifying and recovering behind the suitable program desorption.
Its three, avoid causing the problem of sludge treatment.Because adsorbate is after reaction is accomplished; Utilize externally-applied magnetic field just can reclaim fast immediately, therefore, reclaim simultaneously each adsorbate with and on copper ion after; Can reduce the reacted mud of heavy metal wastewater thereby and produce and discharging, reach the purpose of avoiding causing the sludge treatment problem.
Its four, the valuable metal in the heavy metal wastewater thereby is able to reclaim.Because adsorbate is after reaction is accomplished; Utilize externally-applied magnetic field to reclaim; Can pass through proper procedure this moment, makes the copper ion on the adsorbate break away from adsorption layer 21, so except making the adsorbate purifying and recovering re-uses; The valency copper ion that has that breaks away from can reclaim equally, reaches the purpose that the valuable metal in the heavy metal wastewater thereby is able to reclaim.
What be worth explanation is to consult Fig. 2, for the copper metallic wastewater carries out optimal adsorption reaction pH value resolution chart; The longitudinal axis representes to remove the percentage of copper ion; Transverse axis is represented the pH value of copper metallic wastewater, under different pH values (3,4,5,5.5,6,7), gets the tri-iron tetroxide (Fe of 1g
3O
4), the tri-iron tetroxide (SiO that is coated with silicon oxide
2/ Fe
3O
4) and adsorbate add in 100 milliliters the copper ion solution; The concentration of copper ion is 100mg/L, 25 ℃ of following isothermal vibrations 24 hours, in the process of isothermal vibration, continues adjustment pH value; React the back and filtered an amount of solution; Measure its extraneous copper ion concentration with flame atomic absorption spectrophotometer, find out the pH value that can reach optimal adsorption, relatively find behind the numerical value copper metallic wastewater pH value is controlled at 5.5 ± 0.1st, the optimum condition of adsorbing.
Consult Fig. 3, be adsorbate among the present invention 31 and tri-iron tetroxide (Fe
3O
4) 32, the tri-iron tetroxide (SiO that is coated with silicon oxide
2/ Fe
3O
4) 33 pairs of resolution charts that the copper metallic wastewater carries out adsorption reaction, the longitudinal axis is represented the copper ion adsorbance, transverse axis is represented copper ion concentration, gets the simple tri-iron tetroxide (Fe of 1g respectively
3O
4) 32, the tri-iron tetroxide (SiO that is coated with silicon oxide
2/ Fe
3O
4) 33 and adsorbate 31 add in 100 milliliters the copper ion solution, the concentration of copper ion is 100mg/L, behind adjustment complete soln pH value to 5.5 ± 0.1; 25 ℃ of following isothermal vibrations 24 hours; In the process of isothermal vibration, continuing adjustment pH value is 5.5 ± 0.1, has reacted the back and has filtered an amount of solution, measures its extraneous copper ion concentration with flame atomic absorption spectrophotometer; Being shown by resolution chart, is the tri-iron tetroxide (SiO of adsorbate 31＞be coated with silicon oxide to the adsorption effect of copper ion
2/ Fe
3O
4) 33＞tri-iron tetroxide (Fe
3O
4) 32.
Consult table 1, be adsorbate among the present invention absorbing copper ionic weight comparative result, wherein [Cu under different pH value of water solution
2+]
0=50mg/L, 75mg/L, 100mg/L, 125mg/L, 150mg/L, adsorbate amount of application=10g/L, temperature T=25 ℃, PH=5.5 ± 0.1, the reaction time is 24 hours.The experimental data of table 1 is utilized the in addition emulation of Langmuir isothermal absorption mode, and drawing adsorbate is 11.237mg/g through deriving to the maximal absorptive capacity (Qm) of copper ion; Adsorbate is to the Langmuir equilibrium constant (K of copper ion
L) be 0.047L/mg.
Table 1 adsorbate is the absorbing copper ionic weight under different pH value of water solution
Consult Fig. 1,4; The preparation method of the adsorbate of a kind of tool magnetic that the embodiment of the invention provides, it is mainly by a) material preparation step 51, b) be in harmonious proportion step 52, c) heated and stirred step 53, d) stirring and drying step 54 and e) consecutive steps such as adsorption layer forming step 55 forms.
A) material preparation step 51, first solution of preparing to be mixed by distilled water and sodium metasilicate, are second solution of 1～2 molarity NaOH and are the 3rd solution of 3～5 equivalent concentration sulfuric acid.
B) be in harmonious proportion step 52, (for example: get carrier 10 that 15～25 grams have magnetic by frerrous chloride (FeCl
2) and iron chloride liquid (FeCl
3) tri-iron tetroxide (Fe that produces of mixed precipitation
3O
4)) add in 810～1350 milliliters the distilled water and mix, and adding second solution, to be in harmonious proportion out the pH value be first mixed liquor between 9.4 to 9.6.
C) heated and stirred step 53; First mixed liquor is heated; Add 90～150 milliliters first solution after 85 ℃～95 ℃ and stir when the temperature of this first mixed liquor reaches, its mixing time is 30～60 minutes, and adding the 3rd solution, to be in harmonious proportion out the pH value be second mixed liquor between 6 to 7.
D) stirring and drying step 54 stirs second mixed liquor, and its mixing time is 30～60 minutes; With alcohol and washed with de-ionized water second mixed liquor; Making the pH value of second mixed liquor is 7 to 8, dries subsequently, and its bake out temperature is 95 ℃～110 ℃; Dried product is the adsorbate that carrier 10 is coated with a shell 20, and this moment, shell 20 was a silica.
E) the adsorption layer forming step 55, and processing is modified in shell 20 outsides of adsorbate, make shell 20 outsides have one have an amine functional base of covalent bond knot adsorption layer 21.Say that at length e) adsorption layer forming step 55 is to get the adsorbate of 8～12 grams and the NaOH of 1～2 gram, joins in 400～600 milliliters the toluene, feed and add 15～20 reactant (C that restrain behind the nitrogen temperature to 95 ℃～110 ℃
8H
22N
2O
3Si) react and stir; Mixing time is 24～36 hours; After reacted adsorbate cleans 3～5 times with ethanol; Clean to the pH value of distilled water with distilled water again and no longer change, at last adsorbate is put into vacuum drying oven and dry with 95 ℃～110 ℃, make shell 20 outsides have one have an amine functional base of covalent bond knot adsorption layer 21.
Prepare the adsorbate of providing magnetic through above-mentioned preparation process, this adsorbate can achieve the above object when handling heavy metal wastewater thereby equally.
It should be noted that; The adsorption layer 21 of the shell 20 outside being coated on carrier 10 is modified with amido; When making adsorption layer 21 have the amine functional base of covalent bond knot, except with copper ion has the strong ability that combines, has stronger adsorption capacity with anionic dye (RB5) in the waste water from dyestuff; Therefore, the adsorbate of the tool magnetic of the present invention processing of dyestuff in dyeing and finishing wastewater capable of using.
Consult Fig. 5, be adsorbate among the present invention 31 and tri-iron tetroxide (Fe
3O
4) 34, the tri-iron tetroxide (SiO that is coated with silicon oxide
2/ Fe
3O
4) 35 under different pH value of water solution, the anionic dye in the waste water from dyestuff (RB5) is carried out adsorption reaction resolution chart; The longitudinal axis is represented anionic dye (RB5) adsorbance in the waste water from dyestuff; Transverse axis is represented the pH value of complete soln, gets the simple tri-iron tetroxide (Fe of identical 4g/L respectively
3O
4) 34, the tri-iron tetroxide (SiO that is coated with silicon oxide
2/ Fe
3O
4) 35 and adsorbate 31 add in the waste water from dyestuff of 500mg/L, respectively complete soln pH value is adjusted between 2～12, with 25 ℃ of following isothermal vibrations 20～24 hours.
Can know tri-iron tetroxide (Fe by Fig. 5
3O
4) 34, the tri-iron tetroxide (SiO that is coated with silicon oxide
2/ Fe
3O
4) to compare adsorbate of the present invention 31 poor for the adsorbance of 35 pairs of anionic dyes (RB5); Also can learn by Fig. 5; Complete soln pH value is between 3～6; The adsorbance of 31 pairs of anionic dyes of adsorbate (RB5) can reach maximum, and visible complete soln pH value can make amido form positively charged ammonium ion between 3～6 the time; And the positive charge of ammonium ion just can combine to reach the purpose of absorption with the anion on anionic dye (RB5) molecular structure, so the processing of dyestuff in dyeing and finishing wastewater capable of using of the adsorbate of tool magnetic of the present invention.
Consult table 2, for adsorbate among the present invention is applied to the isothermal adsorpting data of the anionic dye (RB5) in the waste water from dyestuff, wherein [RB5]
0=500mg/L, adsorbate amount of application=4g/L, temperature T=25 ℃, the reaction time is 24 hours.This experimental data is utilized the in addition emulation of Langmuir isothermal absorption mode, and drawing adsorbate is 182.19mg/g through deriving to the maximal absorptive capacity (Qm) of anionic dye (RB5); Adsorbate is to the Langmuir equilibrium constant (K of anionic dye (RB5)
L) be 0.022L/mg.
Table 2 adsorbate is applied to the isothermal adsorpting data of the anionic dye (RB5) in the waste water from dyestuff
In sum; Embodiment in the above-mentioned specific embodiment is preferred embodiment of the present invention; Be not in order to limiting the present invention, anyly know above operator, under the situation that does not break away from know-why of the present invention and spirit; The equalization that the foregoing description is done changes and modification, all belongs to the scope that patent of the present invention contains.
Claims (10)
1. the adsorbate of a tool magnetic is characterized in that, includes:
One carrier, it has magnetic;
One shell, it is coated on outside the said carrier, and said housing exterior has an adsorption layer.
2. the adsorbate of tool magnetic as claimed in claim 1 is characterized in that: said carrier is a tri-iron tetroxide.
3. the adsorbate of tool magnetic as claimed in claim 1 is characterized in that: said shell is a silica.
4. the adsorbate of tool magnetic as claimed in claim 1 is characterized in that: the adsorption layer of said shell has the amine functional base of covalent bond knot.
5. the preparation method of the adsorbate of a tool magnetic is characterized in that, includes:
A) material preparation step, is second solution of 1～2 molarity NaOH and is the 3rd solution of 3～5 equivalent concentration sulfuric acid first solution of preparing to be mixed by distilled water and sodium metasilicate;
B) be in harmonious proportion step, get in the distilled water that carrier that 15～25 grams have magnetic adds 810～1350 milliliters and mix, and adding said second solution, to be in harmonious proportion out the pH value be first mixed liquor between 9.4 to 9.6;
C) heated and stirred step; Said first mixed liquor is heated; Add 90～150 milliliters first solution after 85 ℃～95 ℃ and stir when the temperature of first mixed liquor reaches, and adding said the 3rd solution, to be in harmonious proportion out the pH value be second mixed liquor between 6 to 7;
D) stirring and drying step stirs said second mixed liquor, and with alcohol and washed with de-ionized water second mixed liquor, making the pH value of second mixed liquor is 7 to 8, dries subsequently, and dried product is the adsorbate that a carrier is coated with a shell;
E) adsorption layer forming step is modified processing to the housing exterior of said adsorbate, makes housing exterior have an adsorption layer.
6. the preparation method of the adsorbate of tool magnetic as claimed in claim 5; It is characterized in that: at e) get the NaOH that the adsorbate and 1～2 of 8～12 grams restrains in the adsorption layer forming step; Join in 400～600 milliliters the toluene, feed the reactant that adds 15～20 grams behind the nitrogen temperature to 95 ℃～110 ℃ and react, and stir; After reacted adsorbate cleans 3～5 times with ethanol; Clean to the pH value of distilled water with distilled water again and no longer change, at last adsorbate is put into the vacuum drying oven oven dry, make housing exterior have an adsorption layer.
7. the preparation method of the adsorbate of tool magnetic as claimed in claim 5; It is characterized in that: b) carrier in the mediation step is a tri-iron tetroxide; D) shell in the stirring and drying step is a silica, and e) adsorption layer in the adsorption layer forming step is the amine functional base that has the covalent bond knot.
8. the preparation method of the adsorbate of tool magnetic as claimed in claim 5 is characterized in that: c) mixing time of heated and stirred step is 30～60 minutes, and d) mixing time of stirring and drying step is that 30～60 minutes, bake out temperature are 95 ℃～110 ℃.
9. the preparation method of the adsorbate of tool magnetic as claimed in claim 6 is characterized in that: said reactant molecular formula is C
8H
22N
2O
3Si.
10. the preparation method of the adsorbate of tool magnetic as claimed in claim 6 is characterized in that: bake out temperature is 95～110 ℃, and mixing time is 24～36 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010598663XA CN102527323A (en) | 2010-12-21 | 2010-12-21 | Magnetic adsorbent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010598663XA CN102527323A (en) | 2010-12-21 | 2010-12-21 | Magnetic adsorbent and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102527323A true CN102527323A (en) | 2012-07-04 |
Family
ID=46336075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010598663XA Pending CN102527323A (en) | 2010-12-21 | 2010-12-21 | Magnetic adsorbent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102527323A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101053827A (en) * | 2007-05-10 | 2007-10-17 | 复旦大学 | Surface fixing metal ions magnetic microspheres and its preparation method and application |
| CN100535083C (en) * | 2007-03-08 | 2009-09-02 | 北京化工大学 | Process of removing sulfide from petroleum product |
| CN101628224A (en) * | 2009-08-14 | 2010-01-20 | 陕西北美基因股份有限公司 | Magnetic silicon dioxide microspheres modified with diethylaminoethyl and preparation method and application thereof |
-
2010
- 2010-12-21 CN CN201010598663XA patent/CN102527323A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100535083C (en) * | 2007-03-08 | 2009-09-02 | 北京化工大学 | Process of removing sulfide from petroleum product |
| CN101053827A (en) * | 2007-05-10 | 2007-10-17 | 复旦大学 | Surface fixing metal ions magnetic microspheres and its preparation method and application |
| CN101628224A (en) * | 2009-08-14 | 2010-01-20 | 陕西北美基因股份有限公司 | Magnetic silicon dioxide microspheres modified with diethylaminoethyl and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102114412B (en) | Chitosan-grafted and modified attapulgite clay absorbing material and preparation method thereof | |
| CN101596449B (en) | Preparation method of amidoxime group uranium extraction sorbent | |
| CN102716722A (en) | Preparation method of graphene-based novel nano magnetic biological adsorbent | |
| CN111774045A (en) | Regeneration method of diatomite adsorbent | |
| CN104353437B (en) | A kind of core-shell magnetic poly m-phenylene diamine nano particle and preparation thereof and application | |
| CN113368812A (en) | Co3O4Halloysite composite material, preparation method and application | |
| CN108862310A (en) | A kind of weakly acidic pH zeolite molecular sieve and its preparation method and application | |
| CN105664840A (en) | Modified aluminum salt adsorbent, preparation method and application thereof | |
| CN112871137A (en) | Preparation method of functionalized aluminate adsorbing material and application of functionalized aluminate adsorbing material in removal of various pollutants | |
| CN113929492A (en) | Preparation method of hydrotalcite-like composite material for phosphorus recovery, and product and application thereof | |
| CN111250059A (en) | Hyperbranched polyethyleneimine modified carbon fiber adsorption material for adsorbing indium (III) and preparation method thereof | |
| KR101305393B1 (en) | Amine functionalized mesoporous iron oxyhydroxide and method for fabricating the same | |
| CN101966444A (en) | Preparation method of dephosphorisation absorptive material and application thereof | |
| CN107324439A (en) | A kind of processing method of methylene blue dye wastewater | |
| CN102527323A (en) | Magnetic adsorbent and preparation method thereof | |
| CN101402033A (en) | Chelate adsorption material and method of producing the same | |
| CN106268718B (en) | A kind of method and its application of modified activated carbon | |
| CN111589418B (en) | Bentonite/expanded graphite composite adsorbent and preparation method and application thereof | |
| CN113713722B (en) | Preparation method of EPS-like agarose-based hydrogel and application of EPS-like agarose-based hydrogel in adsorption dephosphorization | |
| CN102836696B (en) | Preparation method of magnetic nano solid-phase extracting agent for Pb<2+> separation | |
| CN109482133B (en) | Method for preparing adsorbing material by using waste liquid of Hummers method | |
| CN110201638B (en) | Preparation and application of MOF material | |
| CN112295524B (en) | Method for preparing amino modified silica gel by microwave heating | |
| TWI444335B (en) | Magnetic adsorbate and its manufacturing method thereof | |
| CN115138340B (en) | Preparation method and application of phosphorylated magnetic chitosan adsorbent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120704 |