CN110433765A - The preparation method and applications of EDTA intercalation ferrimanganic layered double hydroxide - Google Patents
The preparation method and applications of EDTA intercalation ferrimanganic layered double hydroxide Download PDFInfo
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- CN110433765A CN110433765A CN201910761528.3A CN201910761528A CN110433765A CN 110433765 A CN110433765 A CN 110433765A CN 201910761528 A CN201910761528 A CN 201910761528A CN 110433765 A CN110433765 A CN 110433765A
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- ferrimanganic
- edta
- intercalation
- layered double
- double hydroxide
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- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000009830 intercalation Methods 0.000 title claims abstract description 28
- 230000002687 intercalation Effects 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000003513 alkali Substances 0.000 claims abstract description 10
- 239000011259 mixed solution Substances 0.000 claims abstract description 10
- 239000003643 water by type Substances 0.000 claims abstract description 10
- 238000013019 agitation Methods 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 239000012266 salt solution Substances 0.000 claims abstract description 7
- 238000003483 aging Methods 0.000 claims abstract description 6
- 230000032683 aging Effects 0.000 claims abstract description 6
- 239000012299 nitrogen atmosphere Substances 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract description 4
- 239000007864 aqueous solution Substances 0.000 claims abstract description 3
- 239000000706 filtrate Substances 0.000 claims abstract description 3
- 239000000725 suspension Substances 0.000 claims abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000004090 dissolution Methods 0.000 claims description 5
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 claims description 4
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 4
- 150000002696 manganese Chemical class 0.000 claims description 4
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 claims description 2
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims 1
- 229910052785 arsenic Inorganic materials 0.000 abstract description 11
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 abstract description 9
- 239000002351 wastewater Substances 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 238000001179 sorption measurement Methods 0.000 abstract description 3
- 238000006555 catalytic reaction Methods 0.000 abstract 1
- 239000003814 drug Substances 0.000 abstract 1
- 230000005518 electrochemistry Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 10
- 238000010521 absorption reaction Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009616 inductively coupled plasma Methods 0.000 description 3
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000006228 supernatant Substances 0.000 description 3
- 230000001988 toxicity Effects 0.000 description 3
- 231100000419 toxicity Toxicity 0.000 description 3
- 239000003463 adsorbent Substances 0.000 description 2
- 229960001545 hydrotalcite Drugs 0.000 description 2
- 229910001701 hydrotalcite Inorganic materials 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 150000001449 anionic compounds Chemical class 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000011953 bioanalysis Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 210000000748 cardiovascular system Anatomy 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 230000009920 chelation Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 150000004696 coordination complex Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 229940009662 edetate Drugs 0.000 description 1
- 229960001484 edetic acid Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000004709 eyebrow Anatomy 0.000 description 1
- 210000000720 eyelash Anatomy 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- -1 hydrotalcite compound Chemical class 0.000 description 1
- 229910001412 inorganic anion Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 235000015424 sodium Nutrition 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012360 testing method 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
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0222—Compounds of Mn, Re
-
- 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
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0225—Compounds of Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt
- B01J20/0229—Compounds of Fe
-
- 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
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
-
- 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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic 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
- C02F2101/103—Arsenic compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a kind of preparation method and applications of EDTA intercalation ferrimanganic layered double hydroxide.Configure ferrimanganic mixing salt solution and alkali mixed solution.100 mL ultrapure waters are added into three-necked flask, sealing, magnetic agitation under nitrogen atmosphere, alkali mixed solution is instilled in three-necked flask to the pH value 10 ~ 12 for making aqueous solution, then ferrimanganic mixing salt solution and alkali mixed solution is added dropwise simultaneously into three-necked flask, period maintains the nitrogen atmosphere in three-necked flask, and keeping the pH value of mixed liquor is 10 ~ 12, after completion of dropwise addition, resulting suspension continues 10 min of sealing stirring, it is subsequently placed in 60 DEG C of 2 ~ 12 h of ageing in water-bath, it is cooled to room temperature after ageing, filtering and washing 3 ~ 5 times, much filtrate dries 24 h, obtain EDTA intercalation ferrimanganic layered double hydroxide.Applied to arsenic-containing waste water processing.Present invention Fe/Mn-EDTA-LDH obtained has good layer structure, can be used for adsorption treatment arsenic-containing waste water, while having potential application in terms of catalysis, medicine and electrochemistry.
Description
Technical field
The invention belongs to technical field of water environment treatment, in particular to a kind of EDTA intercalation ferrimanganic laminated type bimetal hydroxide
The preparation method and applications of object.
Background technique
While economy rapid development, economic benefit is increasingly highlighted to the negative effect of environment bring, and heavy metal is to ring
The pollution in border and influence to the mankind are increasing.Wherein, heavy metal to the pollution most serious of water body, be most difficult to control.Processing
The technology of heavy metal wastewater thereby can be summarized as three kinds: chemical method, bioanalysis and physical-chemical process.They mainly include precipitating, biology
Flocculation, a variety of methods such as ion exchange, absorption.But its is many expensive, and (such as generates two with certain limitation
Secondary pollutant, service life is short, and process conditions require high).Absorption method is at low cost with its, easy to operate, high-efficient, equipment is simple
The advantages that single, material easily regenerates and be concerned.
Arsenic is a kind of substance with toxicity and carcinogenicity, can cause cutaneous lesions, nerve, digestion and cardiovascular system barrier
Hinder.Arsenic has two kinds of valence states of trivalent and pentavalent in the environment, and the toxicity of trivalent arsenic is about 60 times of pentavalent arsenic toxicity, the processing to it
Have become global sciences problems.Statistical data shows that there are about 110,000 tons of arsenic to enter water by all means every year in the world
In environment, surface water and groundwater is polluted, seriously threatens human health.Therefore, solve the problems, such as that arsenic pollution is compeled in eyebrow
Eyelash.
Layered double hydroxide (LDHs), i.e. hydrotalcite compound have more than 100 years developing histories so far,
It is widely used in every field due to unique structure feature.Absorption and intercalation property are two current big research heat of LDHs
Point.On the one hand, LDHs has biggish specific surface area (20 ~ 250 m2/ g) and flourishing pore structure, show that it can be used as
Adsorbent；When as adsorbent, in addition to Electrostatic Absorption, there are also surfaces to be complexed, physical the effects of adsorbing, chemically adsorbing,
Therefore can be widely applied to the removal of each pollutant, printing and dyeing, papermaking, in terms of have and use LDHs as adsorbing
The report of agent.On the other hand, LDHs is that the stratified material that unique one kind can carry out intercalation can be at it using this feature
The specific object of Intercalation reaction, assembling obtain required functional stratified nano materials, and then selective removal target contaminant.
The ferrimanganic layered double hydroxide of research report is mostly with the inorganic anions such as carbonate, nitrate anion, chloride ion work at present
For interlayer anion, mainly passes through ion exchange and pollutant is fixed between laminate thus by pollutant removal.
EDTA(ethylenediamine tetra-acetic acid) it is used as a kind of metal complex, stable chelate can be formed with heavy metal ion in solution,
EDTA is introduced into LDHs interlayer, can not only play the architectural characteristic of LDHs itself, but also the chelation of EDTA can be played,
And then LDHs is greatly improved to the removal effect of pollutant.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of EDTA intercalation ferrimanganic layered double hydroxide and its answer
With.Pass through the low direct one-step synthesis EDTA intercalation ferrimanganic layered double hydroxide Fe/Mn-EDTA- of saturation coprecipitation
LDH, to its object phase, structure, at be grouped as, shape characteristic etc. is characterized, and be applied to containing As (III) and As (V)
The adsorption test of simulated wastewater realizes the efficient removal to As in water (III) and As (V).
Prepare the specific steps of EDTA intercalation ferrimanganic layered double hydroxide are as follows:
(1) molysite and manganese salt that ferrimanganic molar ratio is 1:2 are mixed and is dissolved in 50 mL deoxidized waters, sealed, magnetic agitation dissolution,
Obtain ferrimanganic mixing salt solution.
(2) sodium hydroxide and disodium ethylene diamine tetraacetate are mixed and is dissolved in 100 mL deoxidized waters, sealed, magnetic agitation is molten
Solution, obtains alkali mixed solution.
(3) 100 mL ultrapure waters are added into three-necked flask, seal, under nitrogen atmosphere magnetic agitation, step (2) are made
Alkali mixed solution instill in three-necked flask and make the pH value 10 ~ 12 of aqueous solution, then into three-necked flask while a dropping step
(1) alkali mixed solution made from ferrimanganic mixing salt solution made from and step (2) during which maintains the nitrogen atmosphere in three-necked flask,
And keeping the pH value of mixed liquor is 10 ~ 12, after completion of dropwise addition, resulting suspension continues sealing 10 min of stirring, then sets
60 DEG C of 2 ~ 12 h of ageing, are cooled to room temperature, filtering and washing 3 ~ 5 times after ageing in water-bath, and much filtrate is placed in 60 DEG C of bakings
Dry 24 h, obtain EDTA intercalation ferrimanganic layered double hydroxide, then mistake in case or -40 DEG C of vacuum freeze driers
100 meshes are sealed spare.
The molysite and the preferred chlorate of manganese salt.
EDTA intercalation ferrimanganic layered double hydroxide produced by the present invention is applied to As in water (III) and As (V)
Carry out adsorbing separation.
The present invention has the advantages that EDTA intercalation ferrimanganic layered double hydroxide prepared by the present invention has well
Typical hydrotalcite layer structure, and have higher removal effect to As in water (III) and As (V) in neutral conditions.
Present invention process is simple, short preparation period, has the arsenic of serious harm to be of great significance human body removal.
Detailed description of the invention
Fig. 1 is the EDTA intercalation ferrimanganic layered double hydroxide Fe/Mn-EDTA-LDH of preparation of the embodiment of the present invention
XRD spectra.
Fig. 2 is the EDTA intercalation ferrimanganic layered double hydroxide Fe/Mn-EDTA-LDH of preparation of the embodiment of the present invention
FTIR spectrogram.
Fig. 3 is the EDTA intercalation ferrimanganic layered double hydroxide Fe/Mn-EDTA-LDH of preparation of the embodiment of the present invention
SEM figure.
Fig. 4 is that pH adsorbs As (III) and As to EDTA intercalation ferrimanganic layered double hydroxide Fe/Mn-EDTA-LDH
(V) influence diagram.
Fig. 5 be the time to EDTA intercalation ferrimanganic layered double hydroxide Fe/Mn-EDTA-LDH adsorb As (III) and
The influence diagram of As (V).
Fig. 6 be concentration to EDTA intercalation ferrimanganic layered double hydroxide Fe/Mn-EDTA-LDH adsorb As (III) and
The influence diagram of As (V).
Specific embodiment
Embodiment:
The preparation of EDTA intercalation ferrimanganic layered double hydroxide Fe/Mn-EDTA-LDH:
(1) 4.505 g FeCl are weighed3·6H2) and 6.583 g MnCl O(s2·4H2O(s 50 mL deoxidized waters) are added simultaneously
In, sealing, magnetic agitation dissolution obtains ferrimanganic mixing salt solution (Sol S).
(2) 9.6 g NaOH and 4.653 g EDETATE SODIUMs are mixed and is dissolved in 100 mL deoxidized waters, sealed, magnetic force stirs
Dissolution is mixed, alkali mixed solution (Sol B) is obtained.
(3) 100 mL ultrapure waters are added into three-necked flask, seal, it, will after being passed through 10 min of nitrogen under magnetic agitation
(Sol B), which is slowly dropped into three-necked flask, makes pH value of solution 12, and (Sol S) and (Sol is then slowly added dropwise simultaneously into flask
B), it is during which continually fed into nitrogen, and keeping pH value is being 12.
(4) after completion of dropwise addition, sealing is stirred 10 min of solution, is subsequently placed in 60 DEG C of water-baths and is aged 2 h.
(5) it is cooled to room temperature after being aged, filtering and washing 3 times.
(6) it obtains object and is placed in -40 DEG C of vacuum freeze driers dry 24 h, the i.e. double gold of acquisition EDTA intercalation ferrimanganic stratiform
Belong to hydroxide Fe/Mn-EDTA-LDH, sieves with 100 mesh sieve, be sealed spare.
The EDTA intercalation ferrimanganic layered double hydroxide Fe/Mn-EDTA-LDH made from the present embodiment carries out following
The adsorption Removal of As (III) and As (V).
Influence of the pH to Fe/Mn-EDTA-LDH absorption As (III) and As (V)
Taking 25 mL concentration respectively is 50 mg/L, and the As (III) and As (V) solution that pH is adjusted to 2 ~ 12 are in 100 mL plastic centrifuges
Guan Zhong, Fe/Mn-EDTA-LDH dosage are 1.2 g/L.At 25 DEG C ± 0.1, revolving speed shakes 24 h of bed reaction for 180 rpm's,
As (III) and As in inductively-coupled plasma spectrometer (ICP-OES) measurement surplus solution is used after taking supernatant liquid filtering film
(V) concentration, as a result as shown in Figure 4.It can be seen from the figure that pH value be 2 ~ 10 ranges in, what the present embodiment was prepared
Fe/Mn-EDTA-LDH is hardly influenced the absorption property of arsenic by pH, to As (III) and As (V) have higher adsorbance and
Good removal effect.
Influence of the time to Fe/Mn-EDTA-LDH absorption As (III) and As (V)
It takes the As (III) and As (V) solution that 25 mL concentration are 50 mg/L in 100 mL plastic centrifuge tubes respectively, pH is adjusted to
7, Fe/Mn-EDTA-LDH dosage is 0.5 g/L.At 25 DEG C ± 0.1, revolving speed be 180 rpm shake 5 min of bed reaction ~
24 h use remaining As in inductively-coupled plasma spectrometer (ICP-OES) measurement solution after taking supernatant liquid filtering film
(III) and the concentration of As (V), as a result as shown in Figure 5.It can be seen from the figure that the Fe/Mn-EDTA- that the present embodiment is prepared
LDH has good removal effect to As (III) and As (V), and as time increases, adsorbance is gradually increased, to As (III)
Absorption with As (V) tends towards stability after 300 min and 700 min substantially respectively.
Influence of the concentration to Fe/Mn-EDTA-LDH absorption As (III) and As (V)
Taking 25 mL concentration respectively is respectively 5 ~ 50 mg/L, and pH is adjusted to 7 As (III) and As (V) solution is moulded in 100 mL
Expect in centrifuge tube, the dosage of Fe/Mn-EDTA-LDH is 0.5 g/L.At 25 DEG C ± 0.1, revolving speed is on the shaking table of 180 rpm
Reaction for 24 hours, uses inductively-coupled plasma spectrometer (ICP-OES) to measure the remaining As of solution after taking supernatant liquid filtering film
(III) and the concentration of As (V), as a result as shown in Figure 6.It can be seen from the figure that the Fe/Mn-EDTA- that the present embodiment is prepared
LDH has good removal effect to the As (III) and As (V) of low concentration, for the As (III) of 50 mg/L and going for As (V)
Except rate is 50% or more.
Claims (3)
1. a kind of preparation method of EDTA intercalation ferrimanganic layered double hydroxide, it is characterised in that specific steps are as follows:
(1) molysite and manganese salt that ferrimanganic molar ratio is 1:2 are mixed and is dissolved in 50 mL deoxidized waters, sealed, magnetic agitation dissolution,
Obtain ferrimanganic mixing salt solution；
(2) sodium hydroxide and disodium ethylene diamine tetraacetate are mixed and is dissolved in 100 mL deoxidized waters, sealed, magnetic agitation dissolution,
Obtain alkali mixed solution；
(3) 100 mL ultrapure waters are added into three-necked flask, seal, under nitrogen atmosphere magnetic agitation, by alkali made from step (2)
Mixed solution instills the pH value 10 ~ 12 for making aqueous solution in three-necked flask, and then into three-necked flask, a dropping step (1) is made simultaneously
During which alkali mixed solution made from the ferrimanganic mixing salt solution and step (2) obtained maintains the nitrogen atmosphere in three-necked flask, and keeps
The pH value of mixed liquor is 10 ~ 12, after completion of dropwise addition, and resulting suspension continues sealing 10 min of stirring, is subsequently placed in water-bath
60 DEG C of 2 ~ 12 h of ageing in pot, are cooled to room temperature, filtering and washing 3 ~ 5 times, much filtrate is placed in 60 DEG C of baking ovens or -40 after ageing
Dry 24 h, obtain EDTA intercalation ferrimanganic layered double hydroxide in DEG C vacuum freeze drier, then cross 100 mesh
Sieve, is sealed spare.
2. the preparation method of EDTA intercalation ferrimanganic layered double hydroxide according to claim 1, it is characterised in that
The molysite and manganese salt are chlorate.
3. a kind of EDTA intercalation ferrimanganic layered double hydroxide of preparation method preparation as claimed in claim 1 or 2
Using, it is characterised in that the EDTA intercalation ferrimanganic layered double hydroxide be applied to As in water (III) and As (V) into
Row adsorbing separation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910761528.3A CN110433765B (en) | 2019-08-18 | 2019-08-18 | Preparation method and application of EDTA (ethylene diamine tetraacetic acid) intercalated ferro-manganese layered double hydroxides |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910761528.3A CN110433765B (en) | 2019-08-18 | 2019-08-18 | Preparation method and application of EDTA (ethylene diamine tetraacetic acid) intercalated ferro-manganese layered double hydroxides |
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| Publication Number | Publication Date |
|---|---|
| CN110433765A true CN110433765A (en) | 2019-11-12 |
| CN110433765B CN110433765B (en) | 2022-05-31 |
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| CN114588878A (en) * | 2022-03-31 | 2022-06-07 | 石河子大学 | Arsenic removal adsorbent and preparation method thereof |
| CN114588878B (en) * | 2022-03-31 | 2024-05-14 | 石河子大学 | Arsenic removal adsorbent and preparation method thereof |
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