CN104324703B - The composite polylactic acid micro-sphere absorption material of Hg (II) in a kind of high selective removal water - Google Patents
The composite polylactic acid micro-sphere absorption material of Hg (II) in a kind of high selective removal water Download PDFInfo
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- CN104324703B CN104324703B CN201410468964.9A CN201410468964A CN104324703B CN 104324703 B CN104324703 B CN 104324703B CN 201410468964 A CN201410468964 A CN 201410468964A CN 104324703 B CN104324703 B CN 104324703B
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- polylactic acid
- mercury ion
- water
- composite polylactic
- microballoon
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- 239000004626 polylactic acid Substances 0.000 title claims abstract description 65
- 229920000747 poly(lactic acid) Polymers 0.000 title claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 239000002131 composite material Substances 0.000 title claims abstract description 40
- 239000004005 microsphere Substances 0.000 title claims abstract description 39
- 239000000463 material Substances 0.000 title claims abstract description 34
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 23
- BQPIGGFYSBELGY-UHFFFAOYSA-N mercury(2+) Chemical compound [Hg+2] BQPIGGFYSBELGY-UHFFFAOYSA-N 0.000 claims abstract description 40
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000001179 sorption measurement Methods 0.000 claims abstract description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 19
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 15
- 239000000839 emulsion Substances 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 10
- 239000003960 organic solvent Substances 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 claims description 5
- 241000723346 Cinnamomum camphora Species 0.000 claims description 5
- 229960000846 camphor Drugs 0.000 claims description 5
- 229930008380 camphor Natural products 0.000 claims description 5
- 238000011109 contamination Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000002351 wastewater Substances 0.000 claims description 5
- 239000008239 natural water Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- XTUSEBKMEQERQV-UHFFFAOYSA-N propan-2-ol;hydrate Chemical compound O.CC(C)O XTUSEBKMEQERQV-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 238000009418 renovation Methods 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 abstract description 10
- 230000008929 regeneration Effects 0.000 abstract description 4
- 238000011069 regeneration method Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000003795 desorption Methods 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 15
- 229910021645 metal ion Inorganic materials 0.000 description 13
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 7
- 229910052753 mercury Inorganic materials 0.000 description 6
- 229940071106 ethylenediaminetetraacetate Drugs 0.000 description 5
- 238000005119 centrifugation Methods 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000006228 supernatant Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- LSPHULWDVZXLIL-UHFFFAOYSA-N (+/-)-Camphoric acid Chemical compound CC1(C)C(C(O)=O)CCC1(C)C(O)=O LSPHULWDVZXLIL-UHFFFAOYSA-N 0.000 description 1
- 241000251468 Actinopterygii Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- 208000034530 PLAA-associated neurodevelopmental disease Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000035568 catharsis Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 231100000518 lethal Toxicity 0.000 description 1
- 230000001665 lethal effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 210000001835 viscera Anatomy 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- B01J20/261—Synthetic macromolecular compounds obtained by reactions only involving carbon to carbon unsaturated bonds
-
- 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
- B01J20/262—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation
-
- 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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28016—Particle form
- B01J20/28019—Spherical, ellipsoidal or cylindrical
-
- 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
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
-
- 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
A kind of may be used for adsorbing the composite polylactic acid micro-sphere absorption material of mercury ion in water, it includes that kernel and shell, described kernel are PLA, and described shell is polyvinyl alcohol.Described micro-sphere absorption material can mercury ion in specific adsorption water, the effective mercury ion removed in water, reach water purification effect, in addition by adding the mercury ion desorption that EDTA makes polymer microballoon adsorb, thus realize polymer microballoon material regeneration and utilize.
Description
Technical field
The invention belongs to environmental applications field, identify and adsorb the detection technique field of Hg (II).It is specifically related to a kind of poly-
Lactic acid microspheres composite.
Background technology
Mercury is one of poisonous heavy metal, widely exists in environment, and relative to other heavy metals, mercury pollution is more general
All over and be more difficult to remove.Mercury and mercuric compounds can enter human body by all means, and their toxicity is accumulation, its
Middle inorganic mercury great majority are enriched in internal organ, and other parts at brains, skin and human body can be gathered on a small quantity.So in the poisoning of mercury
It mostly is slow poisoning, fish just can be made as the mercurous 0.0-0.02mg/L of reaching of water body to be poisoned, reach 0.03mg/L and just can make
Aquatic insects be poisoned, the mankind drinking-water in the mercurous 50mg/L of reaching time will be poisoned immediately lethal.Therefore, development efficiently, stable,
Inexpensive mercury ion adsorbent removes the mercury ion in Natural Water or waste water, reaches the purpose of Water warfare, has reality meaning
Justice and significant application value.
As macromolecular material a kind of Prof. Du Yucang, biodegradable, PLA has many advantages, such as without
Poison, raw material are easy to get, biocompatibility is preferable.In vivo, PLA is easy to be resolved into titanium dioxide by associated biomolecule enzyme
Carbon and water, will not assemble in vitals and organism is produced toxic and side effect.In recent years, poly-lactic acid material is at bio-medical
Application in terms of macromolecular material is constantly developed, and wherein PLA has biodegradable, can the formedness of Prof. Du Yucang
Can make it can be as the potential green material of a class.
Summary of the invention
It is an object of the invention to provide a kind of polylactic acid microsphere composite, it can be used for removing the mercury ion in water, especially
It, be applicable to the process to the mercury waste water, reaches to purify the purpose of water.
The present invention is achieved through the following technical solutions:
A kind of composite polylactic acid (PLA) micro-sphere absorption material, it includes that kernel and shell, described kernel are PLA, institute
Stating shell is polyvinyl alcohol.
According to the present invention, the surface potential of described composite polylactic acid micro-sphere absorption material is negative.
According to the present invention, there is small crack in the surface of described composite polylactic acid micro-sphere absorption material.
According to the present invention, the diameter of described composite polylactic acid micro-sphere absorption material is less than 10 μm, it is also possible to less than 7 μm, excellent
Elect 0.5 μm-6 μm as, it is also possible to be 1 μm-5 μm, 1 μm-3 μm.
According to the present invention, described composite polylactic acid micro-sphere absorption material also includes camphor.
The present invention also provides for the preparation method of a kind of described composite polylactic acid micro-sphere absorption material, and the method uses solvent to wave
The method of sending out.
According to the present invention, described method includes: is first dissolved in organic solvent by PLA, is mixed to get W/ with water afterwards
O type emulsion, then this emulsion is mixed with polyethylene alcohol-water solution, form the emulsion that W/O/W type is compound, remove organic molten afterwards
Organic solvent (is preferably volatilized) by agent, obtains composite polylactic acid microballoon.
According to the present invention, in the above-mentioned methods, described W/O/W type complex emulsions is poured into alcohol-water solution (preferably isopropyl
Alcohol-water solution) middle stirring, afterwards organic solvent is volatilized, obtain composite polylactic acid microballoon.
According to the present invention, in the above-mentioned methods, the organic solvent of described dissolving PLA be preferably dichloromethane, the third three
Alcohol, ethanol etc..
According to the present invention, in the above-mentioned methods, preferably camphorate in PLA solution.Described camphor can increase poly-
The stability of compound microballoon.
Present invention also offers the purposes of a kind of described composite polylactic acid micro-sphere absorption material, it is used for removing and adsorbing
Mercury ion in water.Reach to purify the purpose of water.Described water can be Natural Water or waste water etc..
Present invention also offers the adsorption method of a kind of described composite polylactic acid micro-sphere absorption material, it is characterised in that
For Adsorption of Mercury ion.
According to the present invention, described method is for adsorbing the mercury ion in water.
According to the present invention, described water can be Natural Water or waste water etc..
According to the present invention, described microballoon reaches more than 85% to the absorptivity of mercury ion, and preferably more than 95%, more preferably
More than 99%, based on adsorbed mercury ion total amount.
Present invention also offers a kind of composite polylactic acid microballoon being adsorbed with mercury ion, it includes of the present invention compound
Polylactic acid microsphere sorbing material and mercury ion.
According to the present invention, the mercury ion of described composite polylactic acid microballoon absorption from microsphere surface De contamination, thus can reach
Regeneration function to polymer microballoon.The above-mentioned composite polylactic acid microballoon being adsorbed with mercury ion can be regenerated as this through De contamination
The composite polylactic acid microballoon of invention.
Thus the present invention also provides for the renovation process of a kind of composite polylactic acid microballoon being adsorbed with mercury ion, its feature exists
In, use EDTA by mercury ion from microsphere surface De contamination.
In the present invention, owing to PLA is hydrophobic, therefore use polyvinyl alcohol modified so that microballoon hydrophilicity is more
Good.It is an unexpected discovery of the invention that the composite polylactic acid microballoon of the present invention only has response to mercury metal ion, its suction to mercury ion
Yield has reached more than 85%, and preferably more than 95%, more preferably more than 99%, it is based on adsorbed mercury ion total amount.
And other metal ions are had the most weak suction-operated.The absorption of mercury ion is had by the composite polylactic acid microballoon of the visible present invention
There is high selectivity.
Accompanying drawing explanation
Fig. 1 is polymer microballoon scanning electron microscope (SEM) photograph at different conditions, (a) pH=3.6；(b) pH=0；(c) pH=
7.0；(d) Electronic Speculum figure in river.
Fig. 2 is that microballoon is to different metal ion (Hg2+、Cr3+、Cd2+、Pb2+、Ca2+、Zn2+、K+、Cu2+、Mg2+、Na+) suction
Attached.
Detailed description of the invention
The present invention is described in detail by the following examples.But skilled in the art realises that, following embodiment
Not being limiting the scope of the invention, any improvement made on the basis of the present invention and change, all the guarantor of the present invention
Within the scope of protecting.
Embodiment 1: the preparation of composite polylactic acid microballoon
After weighing the desired amount of 500mg PLA and 50mg camphor, dissolve them in stirring in 20mL dichloromethane and make
Abundant dissolving, obtain organic phase solution；It is charged with 1.2mL deionized water, ultrasonic disperse 5 minutes again, obtains homogeneous
The emulsion that w/o type is stable.This emulsion is poured into the polyethylene alcohol-water solution mixing that 30mL mass fraction is 1%, uses homogeneous immediately
Machine makes emulsifying soln, rotating speed 9500 rpms, and the time is 5 minutes, forms the stable emulsion that W/O/W type is compound.Quickly stirring
Mix under dispersion, this complex emulsions is poured slowly into containing in the beaker of the isopropanol-water solutions that 60mL volume fraction is 2%, it
After the most at normal temperatures continue stirring 1 hour, until microballoon in dichloromethane volatilize totally completely, while also make polylactic acid microsphere
Fully hardened.Centrifugation in centrifuge the most again (under 5000g centrifugal 5 minutes), first uses deionization after removing supernatant liquor
Water washs three times, then washs three times with n-hexane, thus can completely remove dichloromethane in polylactic acid microsphere；In washing
After process completes, finally gained lower floor sticky solid is transferred in culture dish, after solid becomes dry, be placed in vacuum drying again
Case continues be dried, keep being dried 12 hours at temperature 40 DEG C.The vial with cover of cleaning transferred to by gained solid the most at last
In, it is stored in glass desicator stand-by.
SEM (SEM) is utilized to observe the above-mentioned composite polylactic acid microballoon prepared under different pH values
Or pattern, particle size and the particle diameter distribution situation in river, as it is shown in figure 1, it is micro-wherein to indicate described composite polylactic acid
Ball having good stability under different PH or in river, pattern and particle size are not affected.
Embodiment 2: the microballoon absorption to metal ion and the measurement of ion concentration
Prepare containing the aqueous solution of the composite polylactic acid microballoon of preparation in different metal ion and embodiment 1 respectively, described
Solution contains following metal ion: Hg the most respectively2+、Cr3+、Cd2+、Pb2+、Ca2+、Zn2+、K+、Cu2+、Mg2+、Na+, described molten
The mass concentration of the metal ion in liquid is 50mg/L, and the mass concentration of the polylactic acid microsphere in described solution is 0.5mg/mL.
Comprise the concrete steps that and first the polylactic acid microsphere weighed up is loaded volumetric flask, then pipette the desired amount of metal ion solution, add afterwards
Deionized water, is configured to the solution of required concentration of metal ions.Ultrasonic disperse stands a period of time after about 15 minutes, one
8000 revs/min of lower centrifugations 5 minutes after hour, polylactic acid microsphere is deposited to the bottom of centrifuge tube, takes out 2/3 volume
Supernatant liquor for plasma emission spectrometer (ICP) measure metal ion mass concentration.
Using plasma emission spectrometer has investigated polylactic acid microsphere to metal ion response present in actual sample
Selectivity experiment, as in figure 2 it is shown, it can be seen that polylactic acid microsphere that the absorptivity of mercury ion has reached 85% is left
Right；And under identical initial concentration, identical test condition, the polylactic acid microsphere metal ion to other, such as Cr3+、Cd2+、
K+、Na+Deng assimilation effect very poor, to their absorptivity in the range of 2 5%, with to Hg (II) absorptivity about 85%
Compare and almost can ignore, it is seen that this micro-sphere absorption material has high selectivity to Hg (II).
Embodiment 3: the regeneration of polymer microballoon.
The polylactic acid microsphere solution of preparation in the embodiment 1 of 6 parts of 0.5mg/mL concentration of preparation the most respectively, more respectively above-mentioned
The solution of each mercury ion adding 10mg/L or 30mg/L in solution, the most each adding concentration is 1 × 10-2mol/L、2×
10-2Mol/L or 3 × 10-2The disodium ethylene diamine tetraacetate (EDTA) of mol/L, ultrasonic disperse about 15 minutes, one hour it
After 8000 revs/min of lower centrifugations 5 minutes, polylactic acid microsphere sinks to the bottom, and takes out supernatant liquor for plasma emissioning light
Spectrometer (ICP) measures metal ion mass concentration.Table 1 shows that the EDTA utilizing variable concentrations is to realize mercury ion from microballoon table
Emaciated face is adsorbed, thus reaches the regeneration function of polymer microballoon.Mercury ion in the rate of recovery of microsphere surface along with the concentration of EDTA
Be continuously increased and increase, be finally reached stable state.
Table 1: the desorption of the mercury ion on polymer microballoon is reclaimed by the EDTA of variable concentrations
Embodiment 4: polymer microballoon application in actual sample.
Three kinds of different water samples below selecting: drinking from Min Jiangshui, running water and the water dispenser that the Min River is fetched
Water, is first centrifuged above-mentioned different water sample, removes presumable sediment impurity, and the most each water sample adds the reality of isodose
Executing the polymer microballoon of preparation in example 1, the mass concentration of microsphere adsorbing agent is 0.5mg/mL, according to behaviour identical in embodiment 2
Test as method, cyclical test three times, obtain result.Table 2 shows that polymer microballoon is in three kinds of different water samples
The absorption of the mercury ion of variable concentrations is reclaimed by (running water, drinking water, river), it was demonstrated that described micro-sphere material is suitable for removing certainly
So mercury ion in water, the water that heavy metal is polluted plays catharsis.Show that this method is analyzing the feasibility on applying,
Practicality.
Table 2: the rate of recovery of the Hg (II) (10mg/L, 30mg/L) of variable concentrations in actual water sample
Claims (17)
1. composite polylactic acid (PLA) micro-sphere absorption material, it includes that kernel and shell, described kernel are PLA, described
Shell is polyvinyl alcohol, and described sorbing material also includes camphor.
2. sorbing material as claimed in claim 1, wherein, the surface potential of described composite polylactic acid micro-sphere absorption material is negative
's.
3. sorbing material as claimed in claim 1 or 2, wherein, the diameter of described composite polylactic acid micro-sphere absorption material is less than 7
μm。
4. sorbing material as claimed in claim 3, wherein, a diameter of 0.5 μm of described composite polylactic acid micro-sphere absorption material-
6μm。
5. sorbing material as claimed in claim 3, wherein, a diameter of 1 μm-3 μ of described composite polylactic acid micro-sphere absorption material
m。
6. a preparation method for the sorbing material described in any one of claim 1-5, including: first PLA is dissolved in organic
In solvent, it is mixed to get w/o type emulsion afterwards with water, then this emulsion is mixed with polyethylene alcohol-water solution, form W/O/W type
Compound emulsion, removes organic solvent afterwards, obtains composite polylactic acid microballoon, and described composite polylactic acid micro-sphere absorption material also wraps
Include camphor.
7. preparation method as claimed in claim 6, wherein, pours into described W/O/W type complex emulsions in alcohol-water solution and stirs
Mixing, organic solvent volatilization, obtains composite polylactic acid microballoon afterwards.
8. preparation method as claimed in claim 7, wherein, described alcohol-water solution is isopropanol-water solutions.
9. preparation method as claimed in claim 7, wherein, the organic solvent of described dissolving PLA be dichloromethane, the third three
Alcohol, ethanol.
10. the purposes of the sorbing material described in any one of claim 1-5, it is for the mercury ion removed or adsorb in water.
11. 1 kinds of composite polylactic acid microballoons being adsorbed with mercury ion, comprising: being combined described in any one of claim 1-5 is poly-
Lactic acid microspheres sorbing material and mercury ion.
The 12. composite polylactic acid microballoons being adsorbed with mercury ion as claimed in claim 11, wherein, described in be adsorbed with mercury ion
Composite polylactic acid microballoon is regenerated as the composite polylactic acid microballoon described in any one of claim 1-5 through De contamination.
13. 1 kinds of adsorption methods, it is characterised in that include using the composite polylactic acid microballoon described in any one of claim 1-5
Sorbing material Adsorption of Mercury ion.
14. methods according to claim 13, it is characterised in that described method is for adsorbing the mercury ion in water.
15. methods according to claim 14, wherein, described water can be Natural Water or waste water.
16. methods according to claim 14, wherein, described microballoon reaches more than 85% to the absorptivity of mercury ion, and it is relative
In adsorbed mercury ion total amount meter.
17. 1 kinds of claims 11 are adsorbed with the renovation process of the composite polylactic acid microballoon of mercury ion, it is characterised in that use
EDTA by mercury ion from microsphere surface De contamination.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410468964.9A CN104324703B (en) | 2014-09-15 | 2014-09-15 | The composite polylactic acid micro-sphere absorption material of Hg (II) in a kind of high selective removal water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410468964.9A CN104324703B (en) | 2014-09-15 | 2014-09-15 | The composite polylactic acid micro-sphere absorption material of Hg (II) in a kind of high selective removal water |
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| CN104324703A CN104324703A (en) | 2015-02-04 |
| CN104324703B true CN104324703B (en) | 2016-08-17 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102671555A (en) * | 2012-05-18 | 2012-09-19 | 江南大学 | Preparation method and application of chitosan and polyvinyl alcohol mixed film |
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