CN106117471A - A kind of preparation of the loess grafted propylene acid copolymer adsorbent for Adsorption of Heavy Metal Ions - Google Patents
A kind of preparation of the loess grafted propylene acid copolymer adsorbent for Adsorption of Heavy Metal Ions Download PDFInfo
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- CN106117471A CN106117471A CN201610503332.0A CN201610503332A CN106117471A CN 106117471 A CN106117471 A CN 106117471A CN 201610503332 A CN201610503332 A CN 201610503332A CN 106117471 A CN106117471 A CN 106117471A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F292/00—Macromolecular compounds obtained by polymerising monomers on to inorganic materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/12—Naturally occurring clays or bleaching earth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/264—Synthetic macromolecular compounds derived from different types of monomers, e.g. linear or branched copolymers, block copolymers, graft copolymers
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- 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
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
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- 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
Abstract
The invention discloses the preparation of a kind of loess grafted propylene acid copolymer adsorbent, it is by after acidified for loess process, silane coupler surface modification, cross-linking agent, initiator effect under, make functional monomer acrylic acid and N vinylpyrrolidone copolymer be grafted on modified Loess surface and obtain.The good biocompatibility of this loess surface graft copolymerization thing, nontoxic, non-secondary pollution.Adsorption experiment shows, loess base functional copolymer prepared by the present invention has good absorption property to Cu in waste water ion and lead ion, has good application prospect in terms of processing effluent containing heavy metal ions.
Description
Technical field
The present invention relates to the preparation of a kind of loess grafted propylene acid copolymer adsorbent, especially a kind of biocompatibility is good
Good, nontoxic, the preparation of the loess grafted propylene acid copolymer adsorbent of non-secondary pollution；It is mainly used in copper ions and lead ion
The process of waste water, belongs to macromolecular material and water-treatment technology field.
Background technology
Along with developing rapidly of industrial or agricultural, environmental pollution is the most increasingly severe, and especially water pollution increases the weight of day by day.Metal
The industries such as smelting, plating discharge plurality of heavy metal ion waste water every year, and environment and the mankind are caused serious harm.In environment
Heavy metal pollution has persistency, disguise, toxicity is big, be difficult to features such as being degraded by microorganisms, and can be made by biological concentration
By the balance of destruction ecosystem, even can be combined by chemistry and biological agent other Organic substances in environment, be formed malicious
The organo-metallic compound that property is higher.In heavy metal contaminants, copper is that one common are poison pollutant, main by plating
Industry, printing industry, coating manufacture, timber preservative manufacture etc. enter water body.Copper ion can not be degraded, and is enriched with by food chain
After entering human body, endanger human health.Although copper is as the trace element of needed by human body, ceruloplasmin during shortage, can be reduced
Activity, but take in heavy dose of copper and human body mucosa can be produced serious stimulation and corrosiveness, and to blood capillary, liver,
Kidney causes damage, serious meeting to cause gastrointestinal disturbance, it is also possible to liver occurs and kidney is downright bad or nonfunction.Excess copper
Ion also can stimulate central nervous system, even can cause depression time serious.Lead mainly by metal plating, run oil,
The industrial activities such as dyestuff coloring, doped fuel, waste incineration are discharged in water or soil.Lead poisoning can damage liver and kidney,
And reduce the formation of hemoglobin, blood pressure and cardiovascular disease can be caused, also result in sterility and infertility, fetal development deformity, youngster
Virgin mental retardation.Lead also damages central nervous system, poisoner may occur in which anemia, have a sleepless night, have a headache, dizzy, irritated, muscle without
The symptoms such as power, hallucination and renal function injury.Up to now, metallic wastewater processing method is a lot, and such as, conventional coagulation, chemistry are heavy
The means such as shallow lake, membrane filtration, ion exchange, absorption.And absorption method is because of efficiency height, low cost, simple operations, nontoxic and adsorbing material
Having the advantages such as recycling potential, research and application in wastewater treatment industry gain great popularity.
Loess is due to its wide material sources, cheap and easy to get, nontoxic, non-secondary pollution, and loose, the architectural feature etc. of porous
Advantage so that it is be widely used in the treatment of waste water.But the absorption property of natural loess is poor, by modified for loess in heavy metal
Application during waste water processes is more extensive.Macromolecule modified can introduce some active function groups on loess surface, to a certain extent
The physicochemical properties on loess surface can be changed, to improve its absorbability, make loess not be destroyed in self intrinsic advantage
In the case of give again its new function.As prepared loess base polyacrylamide amine absorber (CN104211856 A), loess itaconic acid
The preparation (CN105251465 A) etc. of copolymer adsorbent.But existing loess method of modifying, the most small molecule-modified or high
Molecule is combined, and is formed without chemical bond between loess and macromolecular chain, and this makes the dispersion in polymeric matrix of the loess granule steady
Qualitative poor with uniformity.CN105170120 A discloses and prepares functionalization loess base adsorbent by surface grafting polymerization
Method, is by organically-modified to acidified for surface process, silane coupler loess, functional monomer acrylamide and styrene sulphur
Acid sodium and cross-linking agent are dispersed in distilled water, under inert gas shielding, initiator effect, make functional monomer organically-modified
Loess surface carry out graft copolymerization and obtain, wherein polymer and loess surface are with chemical bonds, and loess granule is at polymer
Dispersibility in chain and uniformity more preferably, have good absorption property to the dyestuff methylene blue in waste water and basic fuchsin.But
It is that it is poor for the absorbability of the heavy metal ion in waste water such as copper ion, lead ion etc..Polymer prepared by the method is raw
Thing poor compatibility, monomer whose has certain toxicity.
Summary of the invention
The present invention seeks to for some problems present in prior art, it is provided that a kind of good biocompatibility, adsorptivity
Can be good, the preparation method of the loess grafted propylene acid copolymer adsorbent for Adsorption of Heavy Metal Ions of non-secondary pollution.
One, the preparation of loess grafted propylene acid copolymer adsorbent
The preparation of loess grafted propylene acid copolymer adsorbent of the present invention, is by acidified for loess process, silane coupler surface
Modified, cross-linking agent, initiator effect under, make functional monomer acrylic acid and NVP copolymer grafted
Obtain on modified Loess surface.Its concrete technology is as follows:
(1) surface modification of loess: joined by loess granule in 3 ~ 10 mol/L hydrochloric acid solutions, at 40 ~ 90 DEG C, stirring is lived
Change processes 1 ~ 5 h, filters, is washed till neutrality with distilled water, obtains the loess of surface acidifying；Again the loess that surface is acidified is distributed to
In the mixed solution of alcohol-water, with the pH to 3.0 ~ 4.0 of glacial acetic acid regulation system, it is subsequently adding silane coupler and stirs,
With the pH to 9.0 ~ 10.0 of ammonia regulation system, it is warmed up to 50 ~ 90 DEG C, stirs reaction 2 ~ 8 h；Product through filtering, washing, dry
Dry, obtain the loess of surface modification.
In the mixed solution of alcohol-water, the volume ratio of water and dehydrated alcohol is 1:1 ~ 1:5.
Silane coupler selects KH-570 or KH-171；Silane coupler addition is the 1% ~ 40% of acidifying loess quality.
(2) preparation of loess grafted propylene acid copolymer adsorbent: the loess of surface modification is scattered in distilled water, stirs
Mixing down and be sequentially added into functional monomer acrylic acid and NVP, cross-linking agent, sodium hydroxide solution, after stirring
It is passed through noble gas, is heated to 40 ~ 60 DEG C, adds initiator, be continuously heating to 70 ~ 90 DEG C, stir reaction 20 ~ 150 min；
Product through distilled water wash, be dried, obtain loess grafted propylene acid copolymer adsorbent.
Wherein the mass ratio of functional monomer acrylic acid and NVP is 1:1 ~ 1:3；Functional monomer
Addition is the 5% ~ 40% of surface modification loess quality.
Cross-linking agent usesN,N'-methylene-bisacrylamide, diacrylate propylene glycol ester or glycerol dimethacrylate；
Cross-linking agent addition is 1 ~ 20 % of surface modification loess quality.
The concentration of sodium hydroxide solution is 0.1 ~ 5.0 g/mL；Its addition is that the degree of neutralization making system reaches more than 60%.
Described initiator is potassium peroxydisulfate or Ammonium persulfate.；Initiator addition is the 1 ~ 10% of surface modification loess quality；
Described noble gas is nitrogen, argon or carbon dioxide.
Two, the structure of loess surface grafting acrylic copolymer, morphology characterization
Below by infared spectrum (FT-IR), thermogravimetric analysis (TG), scanning electron microscope (SEM) etc. to loess surface grafting of the present invention
The structure of acrylic copolymer, pattern characterize.
1, FT-IR analyzes
Fig. 1 is the FT-IR collection of illustrative plates of loess surface grafting acrylic copolymer prepared by the present invention.In figure, 3100-3650 cm-1
Broad peak belongs to the stretching vibration of hydroxyl；2950 cm-1There is the stretching vibration peak of C-H in place；1716 cm-1With 1570 cm-1Place
COO occurs-The symmetric and anti-symmetric stretching vibration Absorption Characteristics peak of middle C=O；1670 cm-1There is NVP in place
The stretching vibration absworption peak of middle C=O, 1290 cm-1There are the stretching vibration absworption peak of C-N key, 1410 cm in place-1Near C-occurs
The bending vibration characteristic peak of H；1090 cm-1Near the stretching vibration absworption peak of Si-O-Si, 559 cm occur-1, 497 cm-1Attached
The bending vibration absworption peak of Si-O-Si closely occurs, shows that acrylic acid-NVP copolymer successfully grafts on loess
Surface.
2, TG analyzes
Fig. 2 is the thermogravimetric analysis figure of loess surface grafting acrylic copolymer prepared by the present invention.Weightlessness below 100 DEG C is about
Being 2%, lose is absorption water；100 DEG C ~ 298 DEG C a small amount of weightlessness are unconverted monomer and intermediary water, about 1.4%, 298 DEG C ~
The weightlessness of 620 DEG C is the decomposition of polymer chain, about 10.4%.Final residue 86.2% loess being, illustrates that loess surface connects
In branch acrylic copolymer, copolymer level is less, only accounts for about 10%.
3, sem analysis
Fig. 3 is the SEM figure of loess surface grafting acrylic copolymer prepared by the present invention.Compared with natural loess, it is acidified loess
Heaped-up in the form of sheets, corner angle are clearly demarcated, coarse, have hole, surface to have the most tiny crackle.After copolymer surface modification,
Loess surface is substantially with polymeric film, and face crack disappears, has the lamellar structure of smoother, and acrylic acid and N-ethylene are described
The copolymer of base ketopyrrolidine is successfully grafted to loess surface.
Three, the absorption property of loess surface grafting acrylic copolymer
1, the loess surface grafting acrylic copolymer absorption to copper ion
Take copper ion simulated wastewater 50 mL of 100 mg/L, add loess surface grafting acrylic copolymer prepared by the present invention
0.05 g, constant temperature oscillation 60 min, stand, sucking filtration, and filtrate measures the concentration of extraneous copper ion by UV-VIS spectrophotometry.
Result shows, loess surface grafting acrylic copolymer is up to 97.3% to the clearance of copper ion, and adsorption capacity reaches 97.3 mg/
g。
2, the loess surface grafting acrylic copolymer absorption to lead ion
Take lead ion simulated wastewater 50 mL of 200 mg/L, add loess surface grafting acrylic copolymer prepared by the present invention
0.08 g, constant temperature oscillation 60 min, stand, sucking filtration, and filtrate measures the concentration of remaining lead ion by UV-VIS spectrophotometry.
Result shows, loess surface grafting acrylic copolymer is up to 99.5% to the clearance of lead ion, and adsorption capacity reaches 124.4
mg/g。
In sum, the present invention with loess as matrix, acidified, silane coupler modified after, acrylic acid and N-vinyl
The copolymer of ketopyrrolidine is successfully grafted to loess surface.Loess surface grafting acrylic acid/NVP copolymer
The biocompatibility of adsorbent is good, nontoxic, and non-secondary pollution has good adsorptivity to Cu in waste water ion and lead ion
Can, in processing effluent containing heavy metal ions, there is good application prospect.
Accompanying drawing explanation
Fig. 1 is the infrared absorpting light spectra of loess surface grafting acrylic copolymer adsorbent.
Fig. 2 is the thermogravimetric curve of loess surface grafting acrylic copolymer adsorbent.
Fig. 3 is the scanning electron microscope (SEM) photograph of loess surface grafting acrylic copolymer adsorbent.
Detailed description of the invention
Below by specific embodiment to the preparation of loess grafted propylene acid copolymer adsorbent of the present invention and to copper from
The absorption property of son and lead ion is described further.
Embodiment one
1, the synthesis of loess grafted propylene acid copolymer adsorbent
(1) surface modification of loess: 5 g loess granules are joined in the 10 mol/L hydrochloric acid solutions of 10 mL, stir at 40 DEG C
Mix activation 1 h, filter, be washed till neutrality with distilled water, obtain the loess of surface acidifying；Distribute it to 20 mL alcohol-waters more molten
In liquid (1:1/v:v), with the pH to 3.0 of glacial acetic acid regulation system, stirring is lower adds 0.2 g Silane coupling reagent KH-570 stirring all
Even；Then with the pH to 9.0 of ammonia regulation system, it is warmed up to 50 DEG C, stirring reaction 2 h；Product through filtering, washing, be dried,
Obtain the loess of surface modification.
(2) preparation of loess surface grafting acrylic copolymer: weigh the loess of 4 g surface modifications, is dispersed in 10 mL and steams
In distilled water, stir 10 min；Acrylic acid 0.6 g, NVP 0.7 g, cross-linking agent it is sequentially added under stirringN,N’-
Methylene-bisacrylamide 0.2 g, 0.1 g/mL sodium hydrate aqueous solution 2 mL, be passed through nitrogen, be heated to 40 after stirring
℃；Being subsequently adding 0.1 g initiator potassium persulfate, be continuously heating to 70 DEG C, stirring reaction 90 min, gained crude product is through distillation
Water washs, is dried, and obtains loess surface grafting acrylic copolymer adsorbent.
2, absorption property test
Loess grafted propylene acid copolymer adsorbent is to the clearance of copper ion in simulated wastewater up to 93.5%, and adsorption capacity is
93.5 mg/g；The clearance of lead ion is reached 97.4%, and adsorption capacity is 112.8 mg/g.
Embodiment two
1, the synthesis of loess grafted propylene acid copolymer adsorbent
(1) surface modification of loess: 15 g loess granules are joined in the 5 mol/L hydrochloric acid solutions of 150 mL, at 90 DEG C
Stir-activating 2 h. filters, and is washed till neutrality with distilled water, obtains the loess of surface acidifying；Distribute it to 80 mL ethanol/waters again
(5:1/v:v), in solution, with the pH to 4.0 of glacial acetic acid regulation system, stirring is lower adds 1.5 g silane coupler KH-171 stirrings
Uniformly；Then with the pH to 10.0 of ammonia regulation system；It is warmed up to 90 DEG C, stirring reaction 2 h；Product through filtering, washing, dry
Dry, obtain the loess of surface modification.
(2) preparation of loess surface grafting acrylic copolymer: the loess weighing 10 g surface modifications is dispersed in 40 mL steamings
Distilled water is sequentially added under dispersed with stirring 60 min, stirring acrylic acid 1.5 g, NVP 2 g, cross-linking agentN, N'-methylene-bisacrylamide 1 g, 0.5 g/mL sodium hydrate aqueous solution 5 mL, be passed through nitrogen, then heat after stirring
To 60 DEG C, adding initiator ammonium persulfate 0.5 g, be continuously heating to 90 DEG C, stirring reaction 20 min, gained crude product is through steaming
Distilled water is washed, is dried, and obtains loess surface grafting acrylic copolymer adsorbent.
2, absorption property test
Loess surface grafting acrylic copolymer adsorbent is to the clearance of copper ion in simulated wastewater up to 95.3%, and absorption is held
Amount is 95.3 mg/g；The clearance of lead ion is reached 98.1%, and adsorption capacity is 112.7 mg/g.
Embodiment three
1, the synthesis of loess grafted propylene acid copolymer adsorbent
(1) surface modification of loess: 10 g loess granules are joined in 100 mL 5 mol/L hydrochloric acid solutions, stirs at 60 DEG C
Mix process 3 h, filter, be washed till neutrality with distilled water, obtain the loess of surface acidifying；Distribute it to 50 mL ethanol/waters more molten
In liquid (2:1/v:v), with the pH to 3.5 of glacial acetic acid regulation system, stirring is lower adds 2 g Silane coupling reagent KH-570 stirrings all
Even；Then with the pH to 9.5 of ammonia regulation system, continue to be warmed up to 70 DEG C, stirring reaction 5 h；Product through filter, washing,
It is dried, obtains the loess of surface modification.
(2) preparation of loess surface grafting acrylic copolymer: the loess weighing 10 g surface modifications divides in 20 mL distillations
Dispersed with stirring 30 min in water；Acrylic acid 1 g, NVP 1.5 g, cross-linking agent two propylene it is sequentially added under stirring
Acid propylene glycol ester 1g, 0.2 g/mL sodium hydrate aqueous solution 3 mL, be passed through nitrogen, be heated to 50 DEG C after stirring；Add
0.8 g initiator ammonium persulfate, is continuously heating to 80 DEG C, stirring reaction 60 min, and gained crude product is through distilled water wash, dry
Dry, obtain loess surface grafting acrylic copolymer adsorbent.
2, absorption property test
Loess surface grafting acrylic copolymer adsorbent is to the clearance of copper ion in simulated wastewater up to 96.5%, and absorption is held
Amount is 96.5 mg/g；Clearance containing lead ion is reached 97.8%, and adsorption capacity is 112.8 mg/g.
Embodiment four
1, the synthesis of loess surface grafting acrylic copolymer adsorbent
(1) surface modification of loess: 20 g loess granules are joined in 120 mL 6 mol/L hydrochloric acid solutions, stirs at 70 DEG C
Mix activation 3 h, filter, be washed till neutrality with distilled water, obtain the loess of surface acidifying；Distribute it to 50 mL ethanol/waters again
(4:1/v:v), in solution, with the pH to 4.0 of glacial acetic acid regulation system, stirring is lower adds 4 g Silane coupling reagent KH-570 stirrings all
Even；Then with the pH to 10.0 of ammonia regulation system；It is warmed up to 80 DEG C, stirring reaction 4 h；Product through filtering, washing, dry
Dry, obtain the loess of surface modification.
(2) preparation of loess surface grafting acrylic copolymer: by the loess of 20 g surface modifications at 100 mL distilled water
Middle dispersed with stirring 60 min, is sequentially added into acrylic acid 3 g, NVP 4 g, cross-linking agent dimethyl allene under stirring
Acid glyceride 4 g, 0.5 g/mL sodium hydrate aqueous solution 10 mL, be passed through nitrogen, be heated to 50 DEG C after stirring；Then add
Entering 2 g initiator potassium persulfate, be continuously heating to 80 DEG C, stirring reaction 60 min, gained crude product is through distilled water wash, dry
Dry, obtain loess surface grafting acrylic copolymer adsorbent.
2, absorption property test
Loess surface grafting acrylic copolymer is to the clearance of copper ion in simulated wastewater up to 97.0%, and adsorption capacity is
97.0 mg/g；Clearance containing lead ion is reached 98.9%, and adsorption capacity is 112.6 mg/g.
Above-mentioned loess particulate material is taken from Gansu North Mountain Area of Lanzhou City, and sieving separating removes gravel.
Claims (10)
1. it is used for a preparation for the loess grafted propylene acid copolymer adsorbent of Adsorption of Heavy Metal Ions, is to protect at noble gas
Protect, cross-linking agent, initiator effect under, by functional monomer acrylic acid and NVP copolymer grafted through acid
Change process, the loess surface of silane coupler surface modification and obtain.
2. it is used for the preparation of the loess grafted propylene acid copolymer adsorbent of Adsorption of Heavy Metal Ions as claimed in claim 1, its
It is characterised by: the loess of acidified process, silane coupler surface modification is scattered in distilled water, under stirring, is sequentially added into merit
Energy property monomeric acrylic and NVP, cross-linking agent, sodium hydroxide solution, be passed through noble gas after stirring,
It is heated to 40 ~ 60 DEG C, adds initiator, be continuously heating to 70 ~ 90 DEG C, stir reaction 20 ~ 150 min；Product is through distilled water
Wash, be dried, obtain loess grafted propylene acid copolymer adsorbent.
3. it is used for the preparation of the loess grafted propylene acid copolymer adsorbent of Adsorption of Heavy Metal Ions as claimed in claim 1 or 2,
It is characterized in that: the mass ratio of functional monomer acrylic acid and NVP is 1:1 ~ 1:3；Adding of functional monomer
Enter 5 % ~ 40 % that amount is surface modification loess quality.
4. it is used for the preparation of the loess grafted propylene acid copolymer adsorbent of Adsorption of Heavy Metal Ions as claimed in claim 1 or 2,
It is characterized in that: cross-linking agent usesN,N'-methylene-bisacrylamide, diacrylate propylene glycol ester or dimethyl allene acid glycerol
Ester；Cross-linking agent addition is 1 ~ 20 % of surface modification loess quality.
5. it is used for the preparation of the loess grafted propylene acid copolymer adsorbent of Adsorption of Heavy Metal Ions as claimed in claim 2, its
Be characterised by: the concentration of sodium hydroxide solution is 0.1 ~ 5.0 g/mL, its addition be make the degree of neutralization of system reach 60% with
On.
6. it is used for the preparation of the loess grafted propylene acid copolymer adsorbent of Adsorption of Heavy Metal Ions as claimed in claim 1 or 2,
It is characterized in that: described initiator is potassium peroxydisulfate or Ammonium persulfate.；Initiator addition be surface modification loess quality 1 ~
10 %。
7. it is used for the preparation of the loess grafted propylene acid copolymer adsorbent of Adsorption of Heavy Metal Ions as claimed in claim 1 or 2,
It is characterized in that: described noble gas is nitrogen, argon or carbon dioxide.
8. it is used for the preparation of the loess grafted propylene acid copolymer adsorbent of Adsorption of Heavy Metal Ions as claimed in claim 1 or 2,
It is characterized in that: the technique of loess surface modification is: loess granule is joined in 3 ~ 10 mol/L hydrochloric acid solutions, 40 ~ 90
At DEG C, stir-activating processes 1 ~ 5 h, filters, is washed till neutrality with distilled water, obtains the loess of surface acidifying；Again surface is acidified
Loess is distributed in the mixed solution of alcohol-water, with the pH to 3.0 ~ 4.0 of glacial acetic acid regulation system, is subsequently adding silane coupled
Agent stirs, and with the pH to 9.0 ~ 10.0 of ammonia regulation system, is warmed up to 50 ~ 90 DEG C, stirs reaction 2 ~ 8 h；Product
Through filtering, washing, it is dried, obtains the loess of surface modification.
9. it is used for the preparation of the loess grafted propylene acid copolymer adsorbent of Adsorption of Heavy Metal Ions as claimed in claim 8, its
Being characterised by: in the mixed solution of alcohol-water, the volume ratio of water and dehydrated alcohol is 1:1 ~ 1:5.
10. it is used for the preparation of the loess grafted propylene acid copolymer adsorbent of Adsorption of Heavy Metal Ions as claimed in claim 8, its
It is characterised by: silane coupler selects KH-570 or KH-171；Silane coupler addition is the 1% ~ 40% of acidifying loess quality.
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Cited By (3)
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| CN106861613A (en) * | 2017-04-07 | 2017-06-20 | 环境保护部华南环境科学研究所 | A kind of preparation method of the compound adsorbent for absorbing heavy metal-polluted soil thallium |
| CN106905496A (en) * | 2017-03-18 | 2017-06-30 | 西北师范大学 | A kind of loess particle graft copolymer adsorbent and preparation method thereof |
| CN113368835A (en) * | 2021-05-12 | 2021-09-10 | 重庆文理学院 | Environment repairing material and preparation method and application thereof |
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| CN103159896A (en) * | 2013-04-15 | 2013-06-19 | 西北师范大学 | Preparation of cellulose grafted acrylate copolymer and application of copolymer as adsorbent |
| CN104211856A (en) * | 2014-07-18 | 2014-12-17 | 西北师范大学 | Preparation method of loess-based polyacrylamide adsorbent |
| CN105170120A (en) * | 2015-09-30 | 2015-12-23 | 西北师范大学 | Method for preparing functional loess-based adsorbent through surface graft polymerization |
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| CN113368835A (en) * | 2021-05-12 | 2021-09-10 | 重庆文理学院 | Environment repairing material and preparation method and application thereof |
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