CN100469436C - Bentonite for purifying water and its preparation - Google Patents
Bentonite for purifying water and its preparation Download PDFInfo
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- CN100469436C CN100469436C CNB200610014052XA CN200610014052A CN100469436C CN 100469436 C CN100469436 C CN 100469436C CN B200610014052X A CNB200610014052X A CN B200610014052XA CN 200610014052 A CN200610014052 A CN 200610014052A CN 100469436 C CN100469436 C CN 100469436C
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Abstract
A bentone product with high adsorptive and ion exchanging performance for cleaning water is composed of purified bentone, and carried Fe-contained oxide. It is prepared through purifying bentone, preparing Fe ion solution, preparing ammonia water, synthesizing and vacuum drying.
Description
Technical field
Technical scheme of the present invention relates to the inorganic adsorbent field, specifically is used for magnetic bentonite of water purification and preparation method thereof.
Background technology
Current modal water purification agent is an active carbon, and wherein many is adsorbent with the granular activated carbon.People such as Katlerine-Albber have studied the influence that temperature is adsorbed chloroform, chloroform, removed Tianjin agricultural chemicals, 2,4-dichlorphenoxyacetic acid Callon F300 particle charcoal; Stuart M. etc. has studied the particle charcoal to removal effect of organic matter in the river of Ohio; L.Gammieet al and Thomas F.speth study the organic pollution that granular activated carbon is removed in the water.In addition, Brasquet P studies NACF deep purifying water.Taking a broad view of these researchs can draw, though charcoal absorption is an organic method in the more satisfactory removal drinking water, but active carbon is not so good to the removal effect that endangers bigger halogenated hydrocarbons and heavy metal ion, and the new charcoal price of active carbon is higher, useless charcoal regeneration expense is also very high, need add ozone in advance during use, this causes water treatment expense costliness, is people's an urgent demand so seek the efficient cheap water treatment agent and the technology that substitute active carbon always.
In recent years, China in Guangxi, Liaoning, Xinjiang, Jiangsu, zhejiang and other places finds and verifies a large amount of bentonite mineral products, gross reserves is at the forefront in the world, but compared with developed countries, China's bentonite resource utilizes level low, the scope of application is narrow, the variation of product development and seriation degree are not enough, so the Application and Development research tool of this cheap ore deposit soil resource is had very important significance.
Bentonite is to be the clay mineral of main component with the montmorillonite, the crystal layer that the montmorillonite unit cell is made up of silicon-oxy tetrahedron and alumina octahedral, bentonite clay particle surface adsorbed water molecule generation aquation, hydrone enter between bentonite bed, cause that bentonite expands in water, enlarge markedly the bentonite specific area, thereby make it have very strong ion-exchange capacity and adsorption capacity.Adopt different modifier to handle and make pillared bentonite, its absorption property is better than original soil.This is a kind of environmental protection adsorbent of potential efficient cheapness, might replace active carbon fully, will have wide practical use in water treatment." preparation method of CN89109200.5 bentonite composite water purifying agent (type) " disclosed a kind of with sodium bentonite, ferrous sulfate (FeSO
47H
2O) and magnesium sulfate (MgSO
47H
2O) be raw material, by abundant mixing, pulverize, obtain by screening BT-1 type water purification agent.This is a kind of Powdered bentonite, and its water purification performance is better, but is difficult to separation and Extraction and repeats to utilize again in the water purification process.
Be applied to the difficult problem that is difficult to separation and Extraction and repeats to utilize again in the water purification process in order to solve Powdered bentonite, existingly add the method that binding agent carries out 500 ℃ of roasting moulding, but can significantly reduce bentonitic adsorptivity and ion-exchange capacity like this.Be exactly in addition through the synthetic organic-pillared bentonite of multistep processes and inorganic pillared bentonite (Ceng Xiuqiong, Xu Yingjie .Al-Fe such as Zhang Yan support bentonitic preparation and to the absorption [J] of reactive brilliant red x-3b. journal of Zhejiang university, 2001,28 (4): 423-427; Cao Mingli, Yu Yanghui, the preparation of .Al-Mn pillared montmorillonites such as Yuan Jizu and microstructure change research [J]. silicate journal, 2002,30 (1): 86-90), increase interlamellar spacing, increasing specific surface area, reaching the purpose that improves absorption property, but this kind technological process complexity, energy consumption is big, and manufacturing cycle is long.
Summary of the invention
Technical problem to be solved by this invention is: a kind of magnetic bentonite that is used for water purification and preparation method thereof is provided, this magnetic bentonite product has the good adsorptivity and the ion exchangeable of working as with the bentonite origin soil phase, good magnetic performance is arranged again simultaneously, be easy to separate, be convenient to repeat to utilize again with magnetic technology; Its preparation method technology is simple, and manufacturing cycle is short, thus the purpose that reaches energy-saving and cost-reducing and be convenient in industry, directly use without moulding.
The present invention solves this technical problem the technical scheme that is adopted:
The present invention is used for the bentonite of water purification, is made up of purification bentonite and the load oxides-containing iron on it, and wherein the mass percent of the shared integral body of content of iron is 9%～29%.Here said oxides-containing iron is made up of multiple ferriferous oxide.
The present invention is used for the preparation method for bentonite of water purification, it is characterized by may further comprise the steps:
(1) the bentonitic preparation of purifying: it is reinforced that bentonite and deionized water are pressed the mass ratio of 1.0:6.5, stirred 30 minutes, left standstill 24 hours, stirred then 15 minutes, add the clear liquid that takes out deionized water or last time again and be mixed with the feed liquid that mass ratio is bentonite: water=1.0:10.0, continue to stir 10 minutes, left standstill again 4 hours, take out supernatant and be used further to preparation next time feed liquid, take out the smart soil in middle level, discard lower floor's sandy soil, dry under 100 ℃ in baking oven, pulverize, cross 200 order molecular sieves and make the purification bentonite;
(2) preparation of iron ion mixed solution: press Fe
3+: Fe
2+Mol ratio for=1:1～2 takes by weighing FeCl
24H
2O and FeCl
36H
2O is mixed with the mixed solution that concentration is 0.03～0.15mol/L;
(3) preparation of ammonia spirit: 4～40 times of 25% concentrated ammonia liquor dilutions shake up standby;
(4) synthetic: according to mass ratio is bentonite: (FeCl
24H
2O+FeCl
36H
2O)=and 1:0.4～1.65, get the purification bentonite that makes in (1), prepare the mixing ferric ion solutions in the adding (2) then, under 35 ℃～60 ℃ constant temperature stirring conditions, press NH in iron ion and the ammonia spirit
3Mol ratio be the amount of calculation of 1:1～11 drip join in (3) ammonia spirit, stirred isolated by filtration solid formation, and spend the solution that deionised water is removed deentrainment after dripping off again 5 minutes;
(5) vacuum drying: the wet solid thing that (4) step was made places vacuum drying chamber mutually, is 600～650mm mercury column in vacuum, and temperature is under 60 ℃ of conditions, dry 3～5 hours, take out dry solid matter, get Magnaglo shape product after the pulverizing, promptly make the magnetic bentonite that is used for water purification.
Beneficial effect of the present invention is:
1. compare with the preparation technology of existing pillared montmorillonite, the preparation from the feedstock purification to the target product produces on the whole, and reaction raw materials is cheap to be easy to get, and synthesis step is few, and handling safety is easy to control, and energy consumption is little, and manufacturing cycle is short; Operate from per step, operating condition is low, reaction temperature and, phenomenon is obvious, reaction unit is simple.
2. compare with existing Powdered bentonite goods,, have small cavernous structure and big specific area from the sign of product; From properties of product, have good adsorption performance and ion-exchange performance, be easy under the magnetic field separate, the following examples and table data are able to fully prove.
3. from the prospect of product, this product nontoxic pollution-free, environmental friendliness has market prospects preferably.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the bentonitic XRD figure of purifying.
Fig. 2 is the bentonitic sem photograph of purifying.
Fig. 3 is the bentonitic XRD figure of magnetic.
Fig. 4 is the bentonitic sem photograph of magnetic.
The specific embodiment:
(1) the bentonitic preparation of purifying: take by weighing commercially available bentonite 100g and measure deionized water 650ml mixed pulp, stirred 30 minutes, left standstill 24 hours, and then stirred 15 minutes, add deionized water 350ml, continue then to stir 10 minutes, left standstill again 4 hours, and took out supernatant and be used further to preparation next time feed liquid, take out the smart soil in middle level, discard lower floor's sandy soil, dry under 100 ℃ in baking oven, pulverize, cross 200 order molecular sieves and make the purification bentonite, standby, its composition analysis is SiO
2%70%, Al
2O
314.5%, Fe
2O
31.26%, MgO 4.54%, Na
2O1.54%, CaO 1.54%, K
2O 0.31%.
Fig. 1 is the bentonitic XRD figure of purifying, by the characteristic peak calculating d of figure
(001)Thereby, determine that the bentonite type is a calcium-base bentonite.
Fig. 2 is the bentonitic sem photograph of purifying, and it shows that original soil is a layered porous road structure, has bigger specific area.
(2) preparation of iron ion mixed solution: the FeCl that takes by weighing 0.5049g with electronic balance
24H
2O, the FeCl of 1.2920g
36H
2O, mol ratio is Fe
2+: Fe
3+=1.000:1.889 places the beaker of 400ml, adds the deionized water 150ml that boiled, and is stirred to crystal and all dissolves, and is standby.
(3) preparation of ammonia spirit: getting mass fraction with graduated cylinder is 25% concentrated ammonia liquor 13ml, adds deionized water then and is diluted to 63ml, shakes up standby.
(4) synthetic: as to take by weighing the bentonite 3g in (1), be put in the round bottom three-necked bottle of 500ml, add the FeCl for preparing in (2)
24H
2O and FeCl
36H
2The mixed solution 150ml of O, mass ratio are bentonite: (FeCl
24H
2O+FeCl
36H
2O)=and 1.000:0.598, stir at 60 ℃ of following constant temperature then, in three-necked bottle, drip the ammonia spirit 63ml for preparing in (3) simultaneously, stirred again 5 minutes after all dripping off, the isolated by filtration solid formation, and spend the solution that deionised water is removed deentrainment.
(5) vacuum drying: the wet solid thing that (4) step was made places vacuum drying chamber mutually, in vacuum is the 600mm mercury column, temperature is under 60 ℃ of conditions, dry 3 hours, take out dry solid matter, get Magnaglo shape product after the pulverizing, promptly make the magnetic bentonite that is used for water purification, wherein the mass percent of the shared integral body of content of iron is 11.71%.
The product of gained is a sample 1, and the absorption switching performance of monoxone and lead ion is listed in the table 1 in its aqueous solution.
(1) the bentonitic preparation of purifying: with (1) among the embodiment 1.
(2) preparation of iron ion mixed solution: take by weighing FeCl with electronic balance
24H
2O0.4857g, FeCl
36H
2O0.9915g, mol ratio is Fe
2+: Fe
3+=1.000:1.500 places the beaker of 400ml, adds the deionized water 200ml that boiled, and is stirred to crystal and all dissolves, and is standby.
(3) preparation of ammonia spirit: getting mass fraction with graduated cylinder is 25% concentrated ammonia liquor 5ml, adds the dried up 100ml of being diluted to then, shakes up standby.
(4) synthetic: as to take by weighing the bentonite 3g in (1), be put in the round bottom three-necked bottle of 500ml, add the FeCl for preparing in (2)
24H
2O and FeCl
36H
2The mixed solution 200ml of O, mass ratio are bentonite: (FeCl
24H
2O+FeCl
36H
2O)=and 1.000:0.492, stir at 60 ℃ of following constant temperature then, in three-necked bottle, drip simultaneously and drip the ammonia spirit 100ml for preparing in (3), stirred again after dripping 5 minutes, the isolated by filtration solid formation, and spend the solution that deionised water is removed deentrainment.
(5) vacuum drying: the wet solid thing that (4) step was made places vacuum drying chamber mutually, in vacuum is the 600mm mercury column, temperature is under 60 ℃ of conditions, dry 4 hours, take out dry solid matter, get Magnaglo shape product after the pulverizing, promptly make the magnetic bentonite that is used for water purification, wherein the mass percent of the shared integral body of content of iron is 10.69%.
The product of gained is a sample 2, and the absorption switching performance to monoxone and lead ion in its aqueous solution is listed in the table 1.
Embodiment 3
(1) the bentonitic preparation of purifying: with (1) among the embodiment 1.
(2) preparation of iron ion mixed solution: take by weighing FeCl with electronic balance
24H
2O 0.4885g, FeCl
36 H
2O1.3000g, mol ratio is Fe
2+: Fe
3+=1.000:1.957 places the beaker of 400ml, adds the deionized water 200ml that boiled, and is stirred to crystal and all dissolves, and is standby.
(3) preparation of ammonia spirit: getting mass fraction with graduated cylinder is 25% concentrated ammonia liquor 3.5ml, adds deionized water and is diluted to 100ml, shakes up standby.
(4) synthetic: as to take by weighing the bentonite 4g in (1), be put in the round bottom three-necked bottle of 500ml, add the FeCl for preparing in (2)
24 H
2O and FeCl
36 H
2The mixed solution 200ml of O, mass ratio are bentonite: (FeCl
24H
2O+FeCl
36H
2O)=and 1.000:0.447, stir at 60 ℃ of following constant temperature then, in three-necked bottle, drip simultaneously and drip the ammonia spirit 100ml for preparing in (3), stirred again after dripping 5 minutes, the isolated by filtration solid formation, and spend the solution that deionised water is removed deentrainment.
(5) vacuum drying: the wet solid thing that (4) step was made places vacuum drying chamber mutually, in vacuum is the 650mm mercury column, temperature is under 60 ℃ of conditions, dry 4 hours, take out dry solid matter, get Magnaglo shape product after the pulverizing, promptly make the magnetic bentonite that is used for water purification, wherein the mass percent of the shared integral body of content of iron is 9.04%.
The product of gained is a sample 3, and the absorption switching performance of monoxone and lead ion is listed in the table 1 in its aqueous solution.
Embodiment 4
(1) the bentonitic preparation of purifying: with (1) among the embodiment 1.
(2) preparation of iron ion mixed solution: take by weighing FeCl with electronic balance
24 H
2O 0.4978g, FeCl
36 H
2O1.2306g, mol ratio is Fe
2+: Fe
3+=1.000:1.817 places the beaker of 400ml, adds the deionized water 200ml that boiled, and is stirred to crystal and all dissolves, and is standby.
(3) preparation of ammonia spirit: getting mass fraction with graduated cylinder is 25% concentrated ammonia liquor 2.5ml, adds deionized water and is diluted to 100ml, shakes up standby.
(4) synthetic: as to take by weighing the bentonite 2g in (1), be put in the round bottom three-necked bottle of 500ml, add the FeCl for preparing in (2)
24 H
2O and FeCl
36 H
2The mixed solution 200ml of O, mass ratio are bentonite: (FeCl
24H
2O+FeCl
36 H
2O)=and 1.000:0.864, stir at 60 ℃ of following constant temperature then, in three-necked bottle, drip simultaneously and drip the ammonia spirit 100ml for preparing in (3), stirred again after dripping 5 minutes, the isolated by filtration solid formation, and spend the solution that deionised water is removed deentrainment.
(5) vacuum drying: the wet solid thing that (4) step was made places vacuum drying chamber mutually, in vacuum is the 650mm mercury column, temperature is under 60 ℃ of conditions, dry 3 hours, take out dry solid matter, get Magnaglo shape product after the pulverizing, promptly make the magnetic bentonite that is used for water purification, wherein the mass percent of the shared integral body of content of iron is 15.80%.
The product of gained is a sample 4, and the absorption switching performance of monoxone and lead ion is listed in the table 1 in its aqueous solution.
Embodiment 5
(1) the bentonitic preparation of purifying: with (1) among the embodiment 1.
(2) preparation of iron ion mixed solution: take by weighing FeCl with electronic balance
24 H
2O 0.5285g, FeCl
36 H
2O1.2401g, mol ratio is Fe
2+: Fe
3+=1.000:1.726 places the beaker of 100ml, adds the deionized water 50ml that boiled, and is stirred to crystal and all dissolves, and is standby.
(3) preparation of ammonia spirit: getting mass fraction with graduated cylinder is 25% concentrated ammonia liquor 5ml, adds deionized water and is diluted to 20ml, shakes up standby.
(4) synthetic: as to take by weighing the bentonite 3g in (1), be put in the round bottom three-necked bottle of 500ml, add the FeCl for preparing in (2)
24 H
2O and FeCl
36 H
2The mixed solution 50ml of O, mass ratio are bentonite: (FeCl
24 H
2O+FeCl
36 H
2O)=and 1.000:0.589, stir at 60 ℃ of following constant temperature then, in three-necked bottle, drip simultaneously and drip the ammonia spirit 20ml for preparing in (3), stirred again after dripping 5 minutes, the isolated by filtration solid formation, and spend the solution that deionised water is removed deentrainment.
(5) vacuum drying: the wet solid thing that (4) step was made places vacuum drying chamber mutually, in vacuum is the 650mm mercury column, temperature is under 60 ℃ of conditions, dry 3 hours, take out dry solid matter, get Magnaglo shape product after the pulverizing, promptly make the magnetic bentonite that is used for water purification, wherein the mass percent of the shared integral body of content of iron is 11.59%.
The outturn sample of gained is a sample 5, and the absorption switching performance of monoxone and lead ion is listed in the table 1 in its aqueous solution.
Embodiment 6
(1) the bentonitic preparation of purifying: with (1) among the embodiment 1.
(2) preparation of iron ion mixed solution: take by weighing FeCl with electronic balance
24 H
2O 0.5105g, FeCl
36 H
2O1.2604g, mol ratio is Fe
2+: Fe
3+=1.000:1.816 places the beaker of 100ml, adds the deionized water 50ml that boiled, and is stirred to crystal and all dissolves, and is standby.
(3) preparation of ammonia spirit: with (3) among the embodiment 5.
(4) synthetic: as to take by weighing the bentonite 3g in (1), be put in the round bottom three-necked bottle of 500ml, add the FeCl for preparing in (2)
24 H
2O and FeCl
36 H
2The mixed solution 50ml of O, mass ratio are bentonite: (FeCl
24 H
2O+FeCl
36 H
2O)=and 1.000:0.590, stir at 50 ℃ of following constant temperature then, in three-necked bottle, drip simultaneously and drip the ammonia spirit 20ml for preparing in (3), stirred again after dripping 5 minutes, the isolated by filtration solid formation, and spend the solution that deionised water is removed deentrainment.
(5) vacuum drying: the wet solid thing that (4) step was made places vacuum drying chamber mutually, in vacuum is the 650mm mercury column, temperature is under 60 ℃ of conditions, dry 3 hours, take out dry solid matter, get Magnaglo shape product after the pulverizing, promptly make the magnetic bentonite that is used for water purification, wherein the mass percent of the shared integral body of content of iron is 11.72%.
The bentonitic XRD figure of magnetic that Fig. 3 makes for the foregoing description, from figure as can be seen, preparation process does not change the structure of original soil, from having kept the good absorption property of original soil, and has increased magnetic behavior.
The bentonitic sem photograph of magnetic that Fig. 4 makes for the foregoing description, from figure as can be seen, the magnetic bentonite has kept the bentonitic layered porous road of original purification structure, is that surperficial video picture dimmed out more originally, should be the thin layer of the oxide of iron.
The product of gained is a sample 6, and the absorption switching performance of monoxone and lead ion is listed in the table 1 in its aqueous solution.
Embodiment 7
(1) the bentonitic preparation of purifying: with (1) among the embodiment 1.
(2) preparation of iron ion mixed solution: take by weighing FeCl with electronic balance
24 H
2O 0.5258g, FeCl
36 H
2O1.0876g, mol ratio is Fe
2+: Fe
3+=1.000:1.520 places the beaker of 100ml, adds the deionized water 50ml that boiled, and is stirred to crystal and all dissolves, and is standby.
(3) preparation of ammonia spirit: with (3) among the embodiment 5.
(4) synthetic: as to take by weighing the bentonite 1g in (1), be put in the round bottom three-necked bottle of 500ml, add the FeCl for preparing in (2)
24 H
2O and FeCl
36 H
2The mixed solution 50ml of O, mass ratio are bentonite: (FeCl
24 H
2O+FeCl
36 H
2O)=and 1.000:1.613, stir at 35 ℃ of following constant temperature then, in three-necked bottle, drip simultaneously and drip the ammonia spirit 20ml for preparing in (3), stirred again after dripping five minutes, the isolated by filtration solid formation, and spend the solution that deionised water is removed deentrainment.
(5) vacuum drying: the wet solid thing that (4) step was made places vacuum drying chamber mutually, in vacuum is the 650mm mercury column, temperature is under 60 ℃ of conditions, dry 3 hours, take out dry solid matter, get Magnaglo shape product after the pulverizing, promptly make the magnetic bentonite that is used for water purification, wherein the mass percent of the shared integral body of content of iron is 24.88%.
The product of gained is a sample 7, and the absorption switching performance of monoxone and lead ion is listed in the table 1 in its aqueous solution.
Embodiment 8
(1) the bentonitic preparation of purifying: with (1) among the embodiment 1.
(2) preparation of iron ion mixed solution: take by weighing FeCl with electronic balance
24 H
2O 0.5235g, FeCl
36H
2O1.1103g, mol ratio is Fe
2+: Fe
3+=1.000:1.560 places the beaker of 100ml, adds the deionized water 50ml that boiled, and is stirred to crystal and all dissolves, and is standby.
(3) preparation of ammonia spirit: with (3) among the embodiment 5.
(4) synthetic: as to take by weighing the bentonite 3g in (1), be put in the round bottom three-necked bottle of 500ml, add the FeCl for preparing in (2)
24 H
2O and FeCl
36 H
2The mixed solution 50ml of O, mass ratio are bentonite: (FeCl
24 H
2O+FeCl
36 H
2O)=and 1.000:0.544, stir at 45 ℃ of following constant temperature then, in three-necked bottle, drip simultaneously and drip the ammonia spirit 20ml for preparing in (3), stirred again after dripping five minutes, the isolated by filtration solid formation, and spend the solution that deionised water is removed deentrainment.
(5) vacuum drying: the wet solid thing that (4) step was made places vacuum drying chamber mutually, in vacuum is the 650mm mercury column, temperature is under 60 ℃ of conditions, dry 5 hours, take out dry solid matter, get Magnaglo shape product after the pulverizing, promptly make the magnetic bentonite that is used for water purification, wherein the mass percent of the shared integral body of content of iron is 10.78%.
The product of gained is a sample 8, and the absorption switching performance of monoxone and lead ion is listed in the table 1 in its aqueous solution.
Embodiment 9
(1) the bentonitic preparation of purifying: with (1) among the embodiment 1.
(2) preparation of iron ion mixed solution: take by weighing FeCl with electronic balance
24 H
2O 2g, FeCl
36 H
2O 2.7g, mol ratio is Fe
2+: Fe
3+=1.000:1.000 places the beaker of 400ml, adds the deionized water 200ml that boiled, and is stirred to crystal and all dissolves, and is standby.
(3) preparation of ammonia spirit: getting mass fraction with graduated cylinder is 25% concentrated ammonia liquor 5ml, adds deionized water and is diluted to 100ml, shakes up standby.
(4). synthetic: as to take by weighing the bentonite 3g in (1), be put in the round bottom three-necked bottle of 500ml, add the FeCl for preparing in (2)
24 H
2O and FeCl
36 H
2The mixed solution 200ml of O, mass ratio are bentonite: (FeCl
24H
2O+FeCl
36H
2O)=and 1.000:1.566, stir at 45 ℃ of following constant temperature then, in three-necked bottle, drip simultaneously and drip the ammonia spirit 100ml for preparing in (3), stirred again after dripping five minutes, the isolated by filtration solid formation, and spend the solution that deionised water is removed deentrainment.
(5) vacuum drying: the wet solid thing that (4) step was made places vacuum drying chamber mutually, in vacuum is the 650mm mercury column, temperature is under 60 ℃ of conditions, dry 3 hours, take out dry solid matter, get Magnaglo shape product after the pulverizing, promptly make the magnetic bentonite that is used for water purification, wherein the mass percent of the shared integral body of content of iron is 28.05%.
The product of gained is a sample 9, and the absorption switching performance of monoxone and lead ion is listed in the table 1 in its aqueous solution.
Table 1 magnetic bentonite and purification bentonite are to the absorption switching performance of monoxone and lead ion
Annotate: the mensuration of magnetic susceptibility: with ancient dust magnetic balance with mohr's salt CuSO
45H
2O is the magnetic susceptibility that marker is measured.Absorption switching performance condition determination: with the adsorbent concentration that bentonite 0.5g or adsorbent magnetic bentonite 0.5g join 100ml respectively of purifying is the Pb of 0.01mol/L
2+Solution or concentration are in the chloroacetic acid solution of 0.01mol/L, at room temperature stir and measure adsorbance when reaching balance in 60 minutes.
From table 1 data as can be seen, each sample is keeping having had certain magnetic again on the basis of original adsorptivity, for separation and Extraction and recovery provide great convenience, has simplified practical operation.In addition, the magnetic bentonite at the different ratios of raw materials preparation according to the different characteristic that product had, can be applied in the practical operation of different condition.
According to data in the table 1 as can be known, the bentonitic magnetic susceptibility of magnetic and the adsorbance of monoxone and lead ion absorption is similar to parabola shaped distribution, from the optimized angle analysis of engineering, the chloroacetic absorption property and the bentonite origin soil phase are worked as with comprehensive relatively can selecting in aspect such as separating complexity by product cost, absorption property to lead ion is better than the bentonite original soil, and magnetic possesses the excellent magnetic bentonite water purification agent that makes that product is easy to separate.
Claims (1)
1. the preparation method for bentonite that is used for water purification is characterized in that may further comprise the steps:
(1) the bentonitic preparation of purifying: it is reinforced that bentonite and deionized water are pressed the mass ratio of 1.0:6.5, stirred 30 minutes, left standstill 24 hours, stirred then 15 minutes, add the clear liquid that takes out deionized water or last time again and be mixed with the feed liquid that mass ratio is bentonite: water=1.0:10.0, continue to stir 10 minutes, left standstill again 4 hours, take out supernatant and be used further to preparation next time feed liquid, take out the smart soil in middle level, discard lower floor's sandy soil, dry under 100 ℃ in baking oven, pulverize, cross 200 order molecular sieves and make the purification bentonite;
(2) preparation of iron ion mixed solution: press Fe
2+: Fe
3+=1.000:1.000, Fe
2+: Fe
3+=1.000:1.500, Fe
2+: Fe
3+=1.000:1.520, Fe
2+: Fe
3+=1.000:1.560, Fe
2+: Fe
3+=1.000:1.726, Fe
2+: Fe
3+=1.000:1.816, Fe
2+: Fe
3+=1.000:1.817, Fe
2+: Fe
3+=1.000:1.889 or Fe
2+: Fe
3+The mol ratio of=1.000:1.957 takes by weighing FeCl
24H
2O and FeCl
36H
2O is mixed with the mixed solution that concentration is 0.03～0.15mol/L;
(3) preparation of ammonia spirit: 4～40 times of 25% concentrated ammonia liquor dilutions shake up standby;
(4) synthetic: according to mass ratio is bentonite: (FeCl
24H
2O+FeCl
36H
2O)=and 1.000:0.447～1.613, get the purification bentonite that makes in (1), prepare the iron ion mixed solution in the adding (2) then, under 35 ℃～60 ℃ constant temperature stirring conditions, press NH in iron ion and the ammonia spirit
3Mol ratio be the amount of calculation of 1:1～11 drip join in (3) ammonia spirit, stirred isolated by filtration solid formation, and spend the solution that deionised water is removed deentrainment after dripping off again 5 minutes;
(5) vacuum drying: the wet solid thing that (4) step was made places vacuum drying chamber mutually, is 600～650mm mercury column in vacuum, and temperature is under 60 ℃ of conditions, dry 3～5 hours, take out dry solid matter, get Magnaglo shape product after the pulverizing, promptly make the bentonite that is used for water purification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610014052XA CN100469436C (en) | 2006-06-06 | 2006-06-06 | Bentonite for purifying water and its preparation |
Applications Claiming Priority (1)
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| CN102219278B (en) * | 2011-05-11 | 2012-11-28 | 常州大学 | Method for improving dye wastewater adsorptivity of hydroxyl iron pillared bentonite |
| CN103464091A (en) * | 2013-10-08 | 2013-12-25 | 武汉科技大学 | Modified bentonite load nanometer iron material and preparation method thereof |
| CN104174354B (en) * | 2014-08-25 | 2016-01-06 | 太原理工大学 | The preparation method of superparamagnetism bentonite base water treatment agent |
| CN104707563A (en) * | 2015-03-18 | 2015-06-17 | 湖南农业大学 | Magnetically modified hydrotalcite as well as preparation method and application thereof |
| CN104826599A (en) * | 2015-05-05 | 2015-08-12 | 济南大学 | Preparation method of magnetic composite organic bentonite |
| CN104826600B (en) * | 2015-05-05 | 2018-03-02 | 济南大学 | A kind of magnetic kleit preparation method |
| CN105126743A (en) * | 2015-08-20 | 2015-12-09 | 南京航空航天大学 | Preparation and recovery methods for magnetic clay adsorption material |
| CN108996636B (en) * | 2018-08-01 | 2021-07-27 | 福州大学 | Preparation method of polysilicate magnetic bentonite flocculant |
| CN110040808A (en) * | 2019-04-23 | 2019-07-23 | 襄阳先创环保科技有限公司 | A kind of purifying agent and processing method of organic reaction waste liquid |
| CN114307949A (en) * | 2022-01-25 | 2022-04-12 | 湖南海澍环保科技有限公司 | Efficient compound water purifying agent and processing method thereof |
| CN115672260B (en) * | 2022-09-02 | 2024-05-28 | 北京工业大学 | Adsorption material and preparation method and application thereof |
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