CN104707563A - Magnetically modified hydrotalcite as well as preparation method and application thereof - Google Patents

Magnetically modified hydrotalcite as well as preparation method and application thereof Download PDF

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CN104707563A
CN104707563A CN201510119713.4A CN201510119713A CN104707563A CN 104707563 A CN104707563 A CN 104707563A CN 201510119713 A CN201510119713 A CN 201510119713A CN 104707563 A CN104707563 A CN 104707563A
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hydrotalcite
calcining
dry
magnetic modified
preparation
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罗琳
张琪
魏建宏
张嘉超
彭湘奇
易建龙
王芳
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Hunan Agricultural University
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Hunan Agricultural University
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Abstract

The invention relates to magnetically modified hydrotalcite as well as a preparation method and an application thereof. A raw material of the magnetically modified hydrotalcite comprises the following components: hydrotalcite, Fe<2+>, Fe<3+> and ammonia water. The preparation method for the magnetically modified hydrotalcite is simple and easy to operate; as an excellent adsorbent, the magnetically modified hydrotalcite has a remarkable removal effect on heavy metal ions in wastewater.

Description

A kind of magnetic modified hydrotalcite and its preparation method and application
Technical field
The present invention relates to method prepared by sorbing material, be specifically related to a kind of magnetic modified hydrotalcite and preparation method thereof and the application in heavy metal wastewater thereby absorption.
Background technology
Materials adsorption utilizes solid matter accumulate or concentrate adsorbate, realizes the object being separated or removing adsorbate.Absorption method process heavy metal has developed into the main flow direction of nearly more than ten years, possesses fast, capacity is large, condition of compatibility is wide, the feature such as easy and simple to handle and non-secondary pollution, has wide market prospects.
Mineral material is a larger branch in numerous adsorbent, nature 100 multiple element is formed with 3000 multi mineral, they spread all over 32 point groups, 230 space groups, in chemical composition, structure type, origin cause of formation occurrence etc., have complexity, diversity, polytropy and regularity.Make full use of the composition of natural resources mineral, structure and physicochemical properties, research mineral structure characteristic and effect in the composite thereof, research and develop new and effective sorbing material, heavy metal ionic adsorption is significant.
Hydrotalcite (hydrotalcite) is the lamellar compound that a class is made up of positively charged and anion that is interlayer filling tape negative electrical charge, is also called layered double-hydroxide.Owing to having a large amount of non-bridge formation hydroxyl that a large amount of constitution waters and adsorbed water and particle surface exist in the Nomenclature Composition and Structure of Complexes of hydrotalcite, therefore in dry run, particle is easily combined by hydrogen bond action, cause particle size uneven, directly affects the effect of material processed heavy metal ion.So need before use to carry out surface modification, what strengthen between particle is sterically hindered, prevents interparticle overlap joint.
At present, the method of modifying that inorganic compound is conventional is high-temperature activation, acid activation, ion-exchange activation, hydro-thermal activation and magnetization modification etc., wherein, magnetization modification is by dispersion and the magnetic material of tool loads in nonmagnetic or that magnetic is very weak solid particle, to strengthen the magnetic susceptibility of solid particle, magnetic changes the magnetic troupe effect of performance enhancement sorbing material thus the adsorption effect of once strong material heavy metal ion.This magnetization modification technology gets the nod in the processing and utilization of mineral resources.General magnetic source (magnetisable material) has two kinds of methods to obtain, and one is artificial preparation, and one is natural magnetic source.In recent years, the inorganic mineral with stronger adsorption capacity is used as matrix material, it is combined with magnetic source and carries out magnetic modification, has prepared the magnetic adsorbent of multiple different types of tool.Such as Zhao Xiao east is waited Fe 3o 4magnetic fluid loads on the bentonite of modification, has prepared a series of compound adsorbent with different magnetic, is applied to process containing Cu 2+, Zn 2+, Cd 2+simulated wastewater.Yuan Mingliang etc. adopt the method for physical bond by natural zeolite and commercially available Fe 3o 4magnetic-particle bonds, preparation magnetic natural zeolite.
Song Yong (Song Yong etc., magnalium iron ternary houghite is to the Study on adsorption properties of Cr (VI), plating and environmental protection, in July, 2013, 33rd volume the 4th phase, 43-45) disclose a kind of preparation method of magnalium iron ternary houghite, be specially: take aluminium chloride 6.50g respectively, magnesium chloride 0.95g, iron chloride 5.90g, be dissolved in 20mL deionized water separately, by liquor alumini chloridi, 70 DEG C are warming up to after magnesium chloride solution and ferric chloride solution mixing, low whipping speed is add the sodium carbonate liquor being warming up to 70 DEG C after mixing 3min under the condition of 250r/min, 30min is left standstill after isothermal reaction 20min, take out suspension, suction filtration, to filter cake cyclic washing to can't detect carbanion in filtrate, then filter cake is dried 24h at 103 DEG C, take out, put into drier and be cooled to room temperature, grind into powder.The adsorption capacity of the hydrotalcite heavy metal ion of synthesis is poor, and saturated extent of adsorption is little, can not reuse.
Have not yet to see the report with cation iron modified hydrotalcite.
Summary of the invention
The object of this invention is to provide a kind of magnetic modified hydrotalcite sorbing material processing heavy metal-containing waste water.
A kind of magnetic modified hydrotalcite provided by the invention, its raw material contains following composition: hydrotalcite, Fe 2+, Fe 3+and ammoniacal liquor.
Concrete, described magnetic modified hydrotalcite raw material contains the composition of following mass parts: Fe 2+0.011mol, Fe 3+0.022mol, hydrotalcite 0.2-2.0g and ammoniacal liquor 5-15ml.
Preferably, described magnetic modified hydrotalcite raw material contains the composition of following mass parts: Fe 2+0.011mol, Fe 3+0.022mol, hydrotalcite 0.5-2.0g and ammoniacal liquor 10-15ml.
Further preferably, described magnetic modified hydrotalcite raw material contains the composition of following mass parts: Fe 2+0.011mol, Fe 3+0.022mol, hydrotalcite 1.0-1.5g and ammoniacal liquor 10-15ml.
Further preferably, described magnetic modified hydrotalcite raw material contains the composition of following mass parts: Fe 2+0.011mol, Fe 3+0.022mol, hydrotalcite 1.5g and ammoniacal liquor 15ml.
Also containing water in described raw material, be by Fe 2+, Fe 3+when reacting with ammoniacal liquor, by Fe 2+, Fe 3+make the aqueous solution being prepared into 100ml, react with the ammoniacal liquor of formula ratio.
In above-mentioned magnetic modified hydrotalcite:
Described hydrotalcite is calcium aluminum hydrotalcite, and its chemical composition is: Ca 2al (OH) 6cl 22H 2o.
Described Fe 2+for frerrous chloride;
Described Fe 3+for iron chloride.
Present invention also offers the preparation method of above-mentioned magnetic modified hydrotalcite, the method comprises the following steps:
1) calcining of hydrotalcite: hydrotalcite is calcined 4h, crosses 100 mesh sieves, dry, obtains the hydrotalcite after calcining, for subsequent use;
2) preparation of tri-iron tetroxide: get FeCl 24H 2o and FeCl 36H 2o is dissolved in distilled water, is mixed with solution, takes Fe according to proportioning 3+, Fe 2+and ammoniacal liquor, add thermal response, then add the hydrotalcite of calcining, sustained response;
3) dry: vacuum seal, room temperature ageing, dry, grinding, sieves, to obtain final product.
Preferably, said method comprising the steps of:
1) calcining of hydrotalcite: by hydrotalcite at 100-1000 DEG C of calcining 4h, cross 100 mesh sieves, dry, obtain the hydrotalcite after calcining, for subsequent use;
2) preparation of tri-iron tetroxide: respectively by FeCl 24H 2o and FeCl 36H 2o is dissolved in distilled water, is mixed with solution, takes Fe according to proportioning 3+, Fe 2+and ammoniacal liquor, add thermal response, bath temperature is 60-90 DEG C, then adds the hydrotalcite of calcining, under water-bath, and constant temperature 60-90 DEG C sustained response;
3) dry: vacuum seal, room temperature ageing 24-36h, dry, grinding, crosses 100 mesh sieves, to obtain final product.
Further preferably, said method comprising the steps of:
1) calcining of hydrotalcite: by hydrotalcite at 300-700 DEG C of calcining 4h, cross 100 mesh sieves, dry, obtain the hydrotalcite after calcining, for subsequent use;
2) preparation of tri-iron tetroxide: respectively by FeCl 24H 2o and FeCl 36H 2o is dissolved in distilled water, is mixed with solution, takes Fe according to proportioning 3+, Fe 2+and ammoniacal liquor, add thermal response, bath temperature is 70-85 DEG C, then adds the hydrotalcite of calcining, under water-bath, and constant temperature 70-85 DEG C sustained response;
3) dry: vacuum seal, room temperature ageing 24-36h, dry, grinding, crosses 100 mesh sieves, to obtain final product.
Present invention also offers the application of above-mentioned magnetic modified hydrotalcite in the material of preparation absorption heavy metal ions in wastewater, heavy metal ion is Cu ion.
Material provided by the invention and preparation method thereof has the following advantages:
1, key problem in technology point of the present invention is: the first, control hydrotalcite calcining heat, is guaranteeing remove intermediary water and take off A n-prerequisite under ensure that interlayer structure does not subside; The second, ensure that magnetic substrate and magnetic modified hydrotalcite sorbing material have higher requirement to temperature, pH in preparation process, must control in suitable temperature, basicity.
2, the magnetic modified hydrotalcite preparation method for preparing of the present invention is simple to operation; Obvious to the removal effect of heavy metal ions in wastewater, be a kind of excellent adsorbent.
Have bibliographical information, the specific area of magnetic substrate is about 33.5m 2g -1, the specific area about 50 ~ 60m of the hydrotalcite after calcining 2g -1.The specific area of magnetic modified hydrotalcite provided by the invention is about 69.88m 2g -1, be all significantly increased than monomer component.
Magnetic modified hydrotalcite aperture provided by the invention, between 2 ~ 50nm, belongs to mesoporous material.The pore structure of this material is analyzed, pore volume 0.13cm 3g -1.Therefore, the specific area of magnetic modified hydrotalcite sorbing material generation layer structure is large.
3, to remove Cu ion in waste water, magnetic modified hydrotalcite pH wide accommodation provided by the invention, within 5.5-6.5 scope, treatment effect is all more than 95%; 37.84mgg when maximal absorptive capacity is 40 DEG C -1; Adsorbent can pass through alkaline solution cleaning and regeneration, can reuse 3 ~ 5 times.Compare than the heavy-metal adsorption material occurred on the market, magnetic modified hydrotalcite provided by the invention has the advantages such as clearance is high, adsorption time is short, can reuse.
Detailed description of the invention
Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Embodiment 1: magnetic modified hydrotalcite
1) calcining of hydrotalcite: calcine 4h under hydrotalcite being placed in 500 DEG C of hot environments, crosses 100 mesh sieves, obtains the hydrotalcite after calcining, puts into vacuum desiccator, for subsequent use.
2) Fe 3o 4preparation and hydrotalcite-modified: with FeCl 24H 2o and FeCl 36H 2o is raw material, with the Fe of anaerobic distilled water preparation 0.44mol/L 3+, 0.22mol/L Fe 2+solution, pipettes containing Fe 3+, Fe 2+the each 50mL of solution, mixes, and drips 15mL ammoniacal liquor, and 80 DEG C of water-bath vibration 15min, add 1.5g calcined hydrotalcite, keep 70 DEG C, continue vibration 90min.
3) dry for standby: vacuum seal, room temperature ageing 24h, is put in 50 DEG C of constant temperature bellows, grinds, cross 100 mesh sieves after dry a few hours, obtained magnetic modified hydrotalcite material.
Embodiment 2: magnetic modified hydrotalcite
1) calcining of hydrotalcite: calcine 4h under hydrotalcite being placed in 300 DEG C of hot environments, crosses 100 mesh sieves, obtains the hydrotalcite after calcining, puts into vacuum desiccator, for subsequent use.
2) Fe 3o 4preparation and hydrotalcite-modified: with FeCl 24H 2o and FeCl 36H 2o is raw material, with the Fe of anaerobic distilled water preparation 0.44mol/L 3+, 0.22mol/L Fe 2+solution, pipettes containing Fe 3+, Fe 2+the each 50mL of solution, mixes, and drips 15mL ammoniacal liquor, and 80 DEG C of water-bath vibration 15min, add 1.5g calcined hydrotalcite, keep 80 DEG C, continue vibration 90min.
3) dry for standby: vacuum seal, room temperature ageing 24h, is put in 50 DEG C of constant temperature bellows, grinds, cross 100 mesh sieves after dry a few hours, obtained magnetic modified hydrotalcite material.
Embodiment 3: magnetic modified hydrotalcite
1) calcining of hydrotalcite: calcine 4h under hydrotalcite being placed in 500 DEG C of hot environments, crosses 100 mesh sieves, obtains the hydrotalcite after calcining, puts into vacuum desiccator, for subsequent use.
2) Fe 3o 4preparation and hydrotalcite-modified: with FeCl 24H 2o and FeCl 36H 2o is raw material, with the Fe of anaerobic distilled water preparation 0.44mol/L 3+, 0.22mol/L Fe 2+solution, pipettes containing Fe 3+, Fe 2+the each 50mL of solution, mixes, and drips 15mL ammoniacal liquor, and 80 DEG C of water-bath vibration 15min, add 1.5g calcined hydrotalcite, keep 80 DEG C, continue vibration 90min.
3) dry: vacuum seal, room temperature ageing 24h, is put in 50 DEG C of constant temperature bellows, grinds, cross 100 mesh sieves after dry a few hours, obtained magnetic modified hydrotalcite material.
Embodiment 4: magnetic modified hydrotalcite
1) calcining of hydrotalcite: calcine 4h under hydrotalcite being placed in 700 DEG C of hot environments, crosses 100 mesh sieves, obtains the hydrotalcite after calcining, puts into vacuum desiccator, for subsequent use.
2) Fe 3o 4preparation and hydrotalcite-modified: with FeCl 24H 2o and FeCl 36H 2o is raw material, with the Fe of anaerobic distilled water preparation 0.44mol/L 3+, 0.22mol/L Fe 2+solution, pipettes containing Fe 3+, Fe 2+the each 50mL of solution, mixes, and drips 15mL ammoniacal liquor, and 80 DEG C of water-bath vibration 15min, add 1.5g calcined hydrotalcite, keep 80 DEG C, continue vibration 90min.
3) dry for standby: vacuum seal, room temperature ageing 24h, is put in 50 DEG C of constant temperature bellows, grinds, cross 100 mesh sieves after dry a few hours, obtained magnetic modified hydrotalcite material.
Embodiment 5: magnetic modified hydrotalcite
1) calcining of hydrotalcite: calcine 4h under hydrotalcite being placed in 500 DEG C of hot environments, crosses 100 mesh sieves, obtains the hydrotalcite after calcining, puts into vacuum desiccator, for subsequent use.
2) Fe 3o 4preparation and hydrotalcite-modified: with FeCl 24H 2o and FeCl 36H 2o is raw material, with the Fe of anaerobic distilled water preparation 0.44mol/L 3+, 0.22mol/L Fe 2+solution, pipettes containing Fe 3+, Fe 2+the each 50mL of solution, mixes, and drips 15mL ammoniacal liquor, and 80 DEG C of water-bath vibration 15min, add 1.5g calcined hydrotalcite, keep 90 DEG C, continue vibration 90min.
3) dry for standby: vacuum seal, room temperature ageing 24h, is put in 50 DEG C of constant temperature bellows, grinds, cross 100 mesh sieves after dry a few hours, obtained magnetic modified hydrotalcite material.
Embodiment 6: magnetic modified hydrotalcite
1) calcining of hydrotalcite: calcine 4h under hydrotalcite being placed in 500 DEG C of hot environments, crosses 100 mesh sieves, obtains the hydrotalcite after calcining, puts into vacuum desiccator, for subsequent use.
2) Fe 3o 4preparation and hydrotalcite-modified: with FeCl 24H 2o and FeCl 36H 2o is raw material, with the Fe of anaerobic distilled water preparation 0.44mol/L 3+, 0.22mol/L Fe 2+solution, pipettes containing Fe 3+, Fe 2+the each 50mL of solution, mixes, and drips 15mL ammoniacal liquor, after 80 DEG C of water-bath vibration 15min, adds 0.2g calcined hydrotalcite, keeps 80 DEG C, continue vibration 90min.
3) dry for standby: vacuum seal, room temperature ageing 24h, is put in 50 DEG C of constant temperature bellows, grinds, cross 100 mesh sieves after dry a few hours, obtained magnetic modified hydrotalcite material.
Embodiment 7: magnetic modified hydrotalcite
1) calcining of hydrotalcite: calcine 4h under hydrotalcite being placed in 500 DEG C of hot environments, crosses 100 mesh sieves, obtains the hydrotalcite after calcining, puts into vacuum desiccator, for subsequent use.
2) Fe 3o 4preparation and hydrotalcite-modified: with FeCl 24H 2o and FeCl 36H 2o is raw material, with the Fe of anaerobic distilled water preparation 0.44mol/L 3+, 0.22mol/L Fe 2+solution, pipettes containing Fe 3+, Fe 2+the each 50mL of solution, mixes, and drips 15mL ammoniacal liquor, after 80 DEG C of water-bath vibration 15min, adds 0.5g calcined hydrotalcite, keeps 80 DEG C, continue vibration 90min.
3) dry for standby: vacuum seal, room temperature ageing 24h, is put in 50 DEG C of constant temperature bellows, grinds, cross 100 mesh sieves after dry a few hours, obtained magnetic modified hydrotalcite material.
Embodiment 8: magnetic modified hydrotalcite
1) calcining of hydrotalcite: calcine 4h under hydrotalcite being placed in 500 DEG C of hot environments, crosses 100 mesh sieves, obtains the hydrotalcite after calcining, puts into vacuum desiccator, for subsequent use.
2) Fe 3o 4preparation and hydrotalcite-modified: with FeCl 24H 2o and FeCl 36H 2o is raw material, with the Fe of anaerobic distilled water preparation 0.44mol/L 3+, 0.22mol/L Fe 2+solution, pipettes containing Fe 3+, Fe 2+the each 50mL of solution, mixes, and drips 15mL ammoniacal liquor, adds 1.0g calcined hydrotalcite, keep 80 DEG C, continue vibration 90min after 80 DEG C of water-bath vibration 15min.
3) dry for standby: vacuum seal, room temperature ageing 24h, is put in 50 DEG C of constant temperature bellows, grinds, cross 100 mesh sieves after dry a few hours, obtained magnetic modified hydrotalcite material.
Embodiment 9: magnetic modified hydrotalcite
1) calcining of hydrotalcite: calcine 4h under hydrotalcite being placed in 500 DEG C of hot environments, crosses 100 mesh sieves, obtains the hydrotalcite after calcining, puts into vacuum desiccator, for subsequent use.
2) Fe 3o 4preparation and hydrotalcite-modified: with FeCl 24H 2o and FeCl 36H 2o is raw material, with the Fe of anaerobic distilled water preparation 0.44mol/L 3+, 0.22mol/L Fe 2+solution, pipettes containing Fe 3+, Fe 2+the each 50mL of solution, mixes, and drips 5mL ammoniacal liquor, adds 1.5g calcined hydrotalcite, keep 80 DEG C, continue vibration 90min after 80 DEG C of water-bath vibration 15min.
3) dry for standby: vacuum seal, room temperature ageing 24h, is put in 50 DEG C of constant temperature bellows, grinds, cross 100 mesh sieves after dry a few hours, obtained magnetic modified hydrotalcite material.
Embodiment 10: magnetic modified hydrotalcite
1) calcining of hydrotalcite: calcine 4h under hydrotalcite being placed in 500 DEG C of hot environments, crosses 100 mesh sieves, obtains the hydrotalcite after calcining, puts into vacuum desiccator, for subsequent use.
2) Fe 3o 4preparation and hydrotalcite-modified: with FeCl 24H 2o and FeCl 36H 2o is raw material, with the Fe of anaerobic distilled water preparation 0.44mol/L 3+, 0.22mol/L Fe 2+solution, pipettes containing Fe 3+, Fe 2+the each 50mL of solution, mixes, and drips 10mL ammoniacal liquor, adds 1.5g calcined hydrotalcite, keep 80 DEG C, continue vibration 90min after 80 DEG C of water-bath vibration 15min.
3) dry for standby: vacuum seal, room temperature ageing 24h, is put in 50 DEG C of constant temperature bellows, grinds, cross 100 mesh sieves after dry a few hours, obtained magnetic modified hydrotalcite material.
Experimental example 1: heavy metal adsorption test one
Carry out heavy metal adsorption test to the magnetic modified hydrotalcite that embodiment 1-8 provides, concrete grammar is:
Vibrate under room temperature 90min, and the magnetic modified hydrotalcite that detection embodiment 1-8 provides is to Cu 2+, Cd 2+, Pb 2+the adsorption effect of heavy metal ion.
Result is as table 1,2
The treatment effect of table 1 hydrotalcite calcining heat heavy metal waste water
Remarks: concentration of heavy metal ion is 50mg/L, volume 40mL, pH=6.0
Table 2 calcined hydrotalcite addition is on the impact preparing magnetic modified hydrotalcite
Remarks: concentration of heavy metal ion is 50mg/L, volume 40mL, pH=6.0
Table 1,2 result displays, embodiment 1-10 demonstrates Cu 2+, Cd 2+, Pb 2+the good adsorption effect of heavy metal ion, wherein the effect of embodiment 1-5, embodiment 8,10 is better, and embodiment 1-4 effect is better, embodiment 2-4 best results.
Result shows, magnetic modified hydrotalcite heavy metal ion provided by the invention has very strong adsorption effect.
Experimental example 2: heavy metal adsorption experiment two
With Cu 2+heavy metal is example, and add the magnetic modified hydrotalcite material that 0.01g, 0.05g, 0.1g, 0.2g are prepared by embodiment 3 respectively, vibrate under room temperature 90min, detects magnetic modified hydrotalcite to Cu 2+the adsorption effect of heavy metal ion, result is as table 3.
The impact of table 3 magnetic modified hydrotalcite dosage heavy metal absorption
Remarks: concentration of heavy metal ion is 50mg/L, volume 40mL, pH=6.0
Table 3 result shows, when dropping into 0.2g magnetic modified hydrotalcite, and the best results of heavy metal absorption.
Experimental example 3: solution ph is on the impact of magnetic modified hydrotalcite Adsorption of Heavy Metals
With Cu 2+heavy metal is example, and heavy metal wastewater thereby pH value controls 2.0,3.0,4.0,5.0,6.0,7.0, and add the magnetic modified hydrotalcite material that 0.2g embodiment 3 provides, vibrate under room temperature 90min, detects magnetic modified hydrotalcite to Cu 2+the adsorption effect of heavy metal ion, result is as table 4.
Table 4 solution ph is on the impact of magnetic modified hydrotalcite Adsorption of Heavy Metals
Remarks: concentration of heavy metal ion is 50mg/L, volume 40mL
Table 4 result shows, and when carrying out heavy metal adsorption, waste water solution being adjusted to pH scope is 5.0-7.0, and effect is better, best results when pH value is 6.0.
Experimental example 4: other method of modifying process heavy metals of hydrotalcite
Lin Nan (Lin Nan etc., the synthesis of modification magnalium hydrotalcite and to Cu in water 2+removal capacity research, water technology, 2008 days, the 34th volume the 9th phase, 30-34) found interlayer organic anion EDTA being inserted into magnalium hydrotalcite, heavy metal ion in the adsorbable solution of combination socket layer material Mg/Al/EDTA-LDHs of preparation.
Experimental result: in table 5.
The modification of table 5 magnetic and other method of modifying are to the effectiveness comparison of hydrotalcite process heavy metal
Embodiment 11 Experimental example 4
Clearance (%) 99.56 98
Table 5 result shows: when the addition of NaOH is more than 1.2 times of theoretical amount, the interlayer anion of synthetic material is OH -and EDTA, when being less than 1.2 times, interlayer anion is OH, EDTA, HEDTA and Mg (EDTA); Cu 2+initial concentration solution is 100mg/L, when quantity of sorbent is 1:1 by EDTA/Cu mol ratio, and Cu 2+cu (EDTA) and Cu is formed with Mg/Al/EDTA-LDHs 2+with the Al dissolved 3+form co-precipitation.
Although above with general explanation, detailed description of the invention and test, the present invention is described in detail, and on basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, all belong to the scope of protection of present invention.

Claims (10)

1. a magnetic modified hydrotalcite, its raw material contains following composition: hydrotalcite, Fe 2+, Fe 3+and ammoniacal liquor.
2. magnetic modified hydrotalcite according to claim 1, is characterized in that, described magnetic modified hydrotalcite raw material contains the composition of following mass parts: Fe 2+0.011mol, Fe 3+0.022mol, hydrotalcite 0.2-2.0g and ammoniacal liquor 5-15ml.
3. magnetic modified hydrotalcite according to claim 1, is characterized in that, described magnetic modified hydrotalcite raw material contains the composition of following mass parts: Fe 2+0.011mol, Fe 3+0.022mol, hydrotalcite 0.5-2.0g and ammoniacal liquor 10-15ml.
4. magnetic modified hydrotalcite according to claim 1, is characterized in that, the one-tenth that described magnetic modified hydrotalcite raw material contains following mass parts is grouped into: Fe 2+0.011mol, Fe 3+0.022mol, hydrotalcite 1.0-1.5g and ammoniacal liquor 10-15ml.
5. the magnetic modified hydrotalcite according to any one of claim 1-4, is characterized in that, described hydrotalcite is calcium aluminum hydrotalcite, and its chemical composition is: Ca 2al (OH) 6cl 22H 2o.
6. the magnetic modified hydrotalcite according to any one of claim 1-4, is characterized in that, described Fe 2+for frerrous chloride; Described Fe 3+for iron chloride.
7. prepare the method for the magnetic modified hydrotalcite described in any one of claim 1-6, it is characterized in that, the method comprises the following steps:
1) calcining of hydrotalcite: hydrotalcite is calcined 4h, crosses 100 mesh sieves, dry, obtains the hydrotalcite after calcining, for subsequent use;
2) preparation of tri-iron tetroxide: get FeCl 24H 2o and FeCl 36H 2o is dissolved in distilled water, is mixed with solution, takes Fe according to proportioning 3+, Fe 2+and ammoniacal liquor, add thermal response, then add the hydrotalcite of calcining, sustained response;
3) dry: vacuum seal, room temperature ageing, dry, grinding, sieves, to obtain final product.
8. method according to claim 7, is characterized in that, said method comprising the steps of:
1) calcining of hydrotalcite: by hydrotalcite at 100-1000 DEG C of calcining 4h, cross 100 mesh sieves, dry, obtain the hydrotalcite after calcining, for subsequent use;
2) preparation of tri-iron tetroxide: respectively by FeCl 24H 2o and FeCl 36H 2o is dissolved in distilled water, is mixed with solution, takes Fe according to proportioning 3+, Fe 2+and ammoniacal liquor, add thermal response, bath temperature is 60-90 DEG C, then adds the hydrotalcite of calcining, under water-bath, and constant temperature 60-90 DEG C sustained response;
3) dry: vacuum seal, room temperature ageing 24-36h, dry, grinding, crosses 100 mesh sieves, to obtain final product.
9. method according to claim 8, is characterized in that, said method comprising the steps of:
1) calcining of hydrotalcite: by hydrotalcite at 300-700 DEG C of calcining 4h, cross 100 mesh sieves, dry, obtain the hydrotalcite after calcining, for subsequent use;
2) preparation of tri-iron tetroxide: respectively by FeCl 24H 2o and FeCl 36H 2o is dissolved in distilled water, is mixed with solution, takes Fe according to proportioning 3+, Fe 2+and ammoniacal liquor, add thermal response, bath temperature is 70-85 DEG C, then adds the hydrotalcite of calcining, under water-bath, and constant temperature 70-85 DEG C sustained response;
3) dry: vacuum seal, room temperature ageing 24-36h, dry, grinding, crosses 100 mesh sieves, to obtain final product.
10. the application of the magnetic modified hydrotalcite described in any one of claim 1-6 in the material in preparation absorption heavy metal ions in wastewater.
CN201510119713.4A 2015-03-18 2015-03-18 Magnetically modified hydrotalcite as well as preparation method and application thereof Pending CN104707563A (en)

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CN114602419A (en) * 2022-03-18 2022-06-10 华北水利水电大学 Mg/Al hydrotalcite, calcined hydrotalcite-like compound, modified hydrotalcite, preparation method and application
CN115676867A (en) * 2022-10-22 2023-02-03 贵州省材料产业技术研究院 Hydrotalcite-like compound/ferroferric oxide array structure nano composite material and preparation method thereof
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