CN109759008A - A kind of modified alta-mud and its preparation method and application - Google Patents
A kind of modified alta-mud and its preparation method and application Download PDFInfo
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- CN109759008A CN109759008A CN201910215862.9A CN201910215862A CN109759008A CN 109759008 A CN109759008 A CN 109759008A CN 201910215862 A CN201910215862 A CN 201910215862A CN 109759008 A CN109759008 A CN 109759008A
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- mud
- modified alta
- bentonite
- waste water
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Abstract
The present invention discloses a kind of method for preparing modified bentonite and its application.Using calcium-base bentonite as basic raw material, the solution for being mixed to get the sulfuric acid of itself and mass fraction 20%.15min is stirred with 1500r/min with six magnetic heating stirrers, 2h is stood, mixes them thoroughly, reacts.It is centrifuged using low speed centrifuge 6000r/min, bentonite is subjected to washing operation until its pH value is in neutrality with distilled water, being put into progress in 105 DEG C of drying box, drying to constant weight, finally obtains modified alta-mud solid.It is followed by ground to powdered.There is stronger adsorption capacity for the pigment in dyeing waste water compared with existing modified alta-mud, can achieve 98.13%.The coloration of waste water containing dye can be reduced using present invention processing waste water from dyestuff, removal turbidity, COD, SS etc., removal rate is high, the good feature of removal effect.
Description
Technical field
The present invention relates to bentonite technical fields, and in particular to a kind of modified alta-mud and its preparation method and application.
Background technique
Bentonite is with montmorillonite clay mineral as main component, and chemical component is quite stable, is known as " omnipotent
Stone ".And the bentonite reserves in China occupy the first in the world, the reserves just verified have made a call to 2,300,000,000 tons, and the storage predicted
Reserve will be at 7,000,000,000 tons or more.Current yield occupies second place of the world.Bentonitic uniqueness mineral composition structure makes its tool
The operational characteristiies such as cementitious, stability, adsorptivity, nontoxicity and ion exchangeable have in terms of the processing of dyeing waste water
Broad application prospect.And modified alta-mud can adsorb pigment in water, the content for lowering CODcr, neutralize pH in waste water,
Adsorb organic matter and some heavy metals and other effects in water.
Common bentonite is difficult to adsorb the pigment in water completely during removing dyeing waste water, and cannot reduce useless
The content of CODcr in water can not have the function that neutralize wastewater pH.It can only achieve the work of absorption Organic substance in water and heavy metal
With.
Summary of the invention
In order to overcome disadvantages described above, the present invention provides a kind of modified alta-mud, can adsorb Organic substance in water and a huge sum of money
While category, the content of the CODcr in waste water can reduce.Technical solution used by purpose to realize the present invention are as follows:
A kind of modified alta-mud, preparation method include the following steps,
1) it takes bentonite to be put into beaker, sulfuric acid solution is added, it is stirring while adding, until stirring evenly；
2) 2h is stood after step 1) acquired solution being stirred 15min；
3) solution after standing is placed in low speed centrifuge and is centrifuged, take solid；
4) step 3) obtained solid is washed with distilled water to neutrality；
5) step 4) products therefrom is put into baking oven, drying is carried out under conditions of 105 DEG C and sets constant weight, obtains being modified swollen
Moisten native solid；
6) modified alta-mud solid abrasive is sieved with 100 mesh sieve, obtains modified alta-mud to powdered.
A kind of above-mentioned modified alta-mud, in step 1), the bentonite is calcium-base bentonite.
A kind of above-mentioned modified alta-mud, in step 1), the mass fraction of sulfuric acid solution is 20%.
A kind of above-mentioned modified alta-mud, in step 1), in mass ratio, calcium-base bentonite: the sulphur that mass fraction is 20%
Acid solution=1:0.1-3.
A kind of above-mentioned modified alta-mud, in step 2), the stirring carries out in six magnetic heating stirrers.
A kind of above-mentioned modified alta-mud, in step 2), the temperature of the stirring is 30-35 DEG C, and mixing speed is
1500r/min。
A kind of above-mentioned modified alta-mud, in step 3), centrifugal speed 6000r/min.
A kind of application of modified alta-mud in processing methyl orange dye.
It is swollen that above-mentioned modification is added under agitation in above-mentioned application in the dyeing waste water of Xiang Hanyou methyl orange dye
Profit soil.
The invention has the benefit that
(1) modified alta-mud of the invention can adsorb the coloring agent in dyeing waste water when processing contaminates waste water,
And since the substances such as organic matter, heavy metal in dyeing waste water can be adsorbed on bentonite by the porosity characteristic of bentonite itself
Surface.
(2) modified alta-mud of the invention has acidity due to itself, can neutralize the pH value (pH of dyeing waste water
Value) so that processed dyeing waste water is reached neutral state.
(3) preparation process of modified alta-mud of the invention is easy to operate, and raw material sources are extensive, cheap,
Thus cost of manufacture is lower.And its product, which pulverizes, can be used, and is not required to the operation such as purification, further reduced the cost of preparation
And operation difficulty.
(4) modified alta-mud of the invention can reduce the coloration of waste water containing dye.Simultaneously the present invention can also remove turbidity,
COD, SS etc., removal rate is high, and removal effect is good.
Detailed description of the invention
Fig. 1 be in embodiment modified alta-mud dosage to the impact effect of adsorption capacity.
Fig. 2 is that the time is shaken in embodiment to the impact effect of modified alta-mud adsorption capacity.
Fig. 3 be in embodiment pH to the impact effect of modified alta-mud adsorption capacity.
Specific embodiment
A kind of modified alta-mud of embodiment 1
(1) it prepares:
1, bentonite pre-processes:
Bentonite is placed on progress acid activation processing under acid environment.Specific step is as follows:
1) 50g bentonite is placed in conical flask.
2) it is that 5% hydrochloric acid solution is stirred that 10g mass fraction is added into conical flask.
3) drying to constant weight.
2, modified alta-mud is prepared:
1) it takes 20g calcium-base bentonite to be put into beaker, the sulfuric acid solution that 8g mass fraction is 20% is added, side edged stirs
It mixes, until stirring evenly；
2) solution of acquisition is placed in six magnetic stirring apparatus, is stood after stirring 15min with the speed of 1500r/min
2h；
3) solution after standing will be placed in low speed centrifuge, is centrifuged with the speed of 6000r/min, taken solid
Body；
4) the resulting solid of step 3) is washed with distilled water to pH is 7；
5) step 3) products therefrom is put into baking oven, drying is carried out under conditions of 105 DEG C and sets constant weight, obtains being modified swollen
Moisten native solid.
6) obtained modified alta-mud solid abrasive is sieved with 100 mesh sieve, obtains modified alta-mud to powdered.
3, it applies
The methyl orange solution of the 40mg/L of 100mL is poured into conical flask, the modification that above-mentioned preparation is added into conical flask is swollen
Moisten soil 40mg, under conditions of pH is in neutrality, adsorption time 1h takes supernatant to be observed.
Then, using tap water as reference, absorbance is measured respectively under maximum absorption wavelength with ultraviolet specrophotometer
A, and modified alta-mud is calculated as follows to the adsorption rate and adsorbance of methyl orange:
In formula: adsorbance (mg/g) of the Q-modified alta-mud to methyl orange；
The initial mass concentration (mg/L) of methyl orange in C0-solution；
C-Adsorption of Methyl Orange balance mass concentration (mg/L)；
V-is adsorbed liquor capacity (mL)；
M-modified alta-mud quality (g).
It is determined by experiment, bentonite can adsorb the pigment in methyl orange solution, and adsorption rate is up to 98.13%.
(2) determination of modified alta-mud optimum condition during the preparation process
1, the influence of modified alta-mud different amounts
(1) it moves into 100mL concentration respectively into the volumetric flask of 10 100mL and is the methyl orange solution of 40mg/L, and mark
Numbers 1,2,3,4,5,6,7,8,9,10.
(2) 10 are sequentially added into ten conical flasks in order, 20,30,40,50,60,70,80,90,100mg
Then modified alta-mud vibrates 30min on constant temperature oscillator, take out conical flask and stand 20min, and supernatant is centrifuged in sucking
In pipe, 15min is centrifuged under conditions of revolving speed is 6000r/min；
(3) it finally, using tap water as reference, is measured respectively at maximum absorption wavelength 464nm with ultraviolet specrophotometer
Absorbance A.
As a result swollen when adding modification as shown in Figure 1 as shown in Figure 1, adsorption rate increases with the increase of adsorbent amount
When the quality of profit soil is 50mg, adsorption rate reaches maximum value, therefore for the methyl orange simulated wastewater of 40mg/L, modified
Bentonitic best input amount is 50mg.
2, the influence of different duration of oscillation:
(1) it moves into the methyl orange solution that 100mL concentration is 40mg/L respectively into the conical flask of 10 250mL, is added
50mg modified alta-mud；
(2) it is placed on oscillator and vibrates 10,20,30,40,50,60,90,120,150,180min respectively；Take out conical flask
20min is stood, by supernatant in sucking centrifuge tube, is centrifuged 15min under conditions of revolving speed is 6000r/min；
(3) it finally, using tap water as reference, is measured respectively at maximum absorption wavelength 464nm with ultraviolet specrophotometer
Absorbance A.
As a result as shown in Fig. 2, the adsorption capacity of modified alta-mud increases increase with time, as duration of oscillation >=120min
When, adsorption rate reaches 99.99%.
3, the influence of difference pH:
(1) pH meter is adjusted.It, will according to the step in pH meter operation instruction with the buffer solution of pH=6.86 and pH=9.18
It is adjusted to state required for this experiment.The pH value for measuring original solution is 6.78.
(2) it is separately added into each 100mL of methyl orange solution that initial concentration is 40mg/L into the volumetric flask of 5 100mL, uses
The NaOH solution preconditioning solution ph (original solution pH is 6.78) for the sulfuric acid solution and 1:5 that concentration is 1:9, obtains pH value difference
For 3,5,7,9,11 solution, its absorbance is surveyed in taking-up a little.Then the modified alta-mud of 50mg is added into remaining solution,
It is placed on oscillator and vibrates 15min, stand, survey its absorbance and pH value after centrifugation, the solution after centrifugation is surveyed into its absorbance again
And pH value.
As a result as shown in figure 3, modified alta-mud increases with PH, adsorption effect first increases and then decreases.Reach most in neutrality
Big adsorption rate is 95.63%, i.e. effect is best when pH=7.
Claims (9)
1. a kind of modified alta-mud, which is characterized in that preparation method includes the following steps,
1) it takes bentonite to be put into beaker, sulfuric acid solution is added, it is stirring while adding, until stirring evenly；
2) 2h is stood after step 1) acquired solution being stirred 15min；
3) solution after standing is placed in low speed centrifuge and is centrifuged, take solid；
4) step 3) obtained solid is washed with distilled water to neutrality；
5) step 4) products therefrom is put into baking oven, drying is carried out under conditions of 105 DEG C and sets constant weight, obtains modified alta-mud
Solid；
6) modified alta-mud solid abrasive is sieved with 100 mesh sieve, obtains modified alta-mud to powdered.
2. a kind of modified alta-mud according to claim 1, which is characterized in that in step 1), the bentonite is calcium
Base bentonite.
3. a kind of modified alta-mud according to claim 2, which is characterized in that in step 1), the quality point of sulfuric acid solution
Number is 20%.
4. a kind of modified alta-mud according to claim 3, which is characterized in that in step 1), in mass ratio, calcium base swelling
Soil: sulfuric acid solution=1:2.5 that mass fraction is 20%.
5. a kind of modified alta-mud according to claim 1, which is characterized in that in step 2), the stirring is six
It is carried out in magnetic heating stirrer.
6. a kind of modified alta-mud according to claim 5, which is characterized in that in step 2), the temperature of the stirring
It is 30-35 DEG C, mixing speed 1500r/min.
7. a kind of modified alta-mud according to claim 6, which is characterized in that in step 3), centrifugal speed 6000r/
min。
8. a kind of application of modified alta-mud in processing methyl orange dye.
9. application according to claim 8, which is characterized in that under agitation, the printing and dyeing of Xiang Hanyou methyl orange dye
Modified alta-mud described in claim 1 is added in waste water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910215862.9A CN109759008A (en) | 2019-03-21 | 2019-03-21 | A kind of modified alta-mud and its preparation method and application |
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| CN201910215862.9A CN109759008A (en) | 2019-03-21 | 2019-03-21 | A kind of modified alta-mud and its preparation method and application |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113976092A (en) * | 2021-11-24 | 2022-01-28 | 辽宁大学 | Method for treating organic pollutant wastewater by using iron-modified sodium montmorillonite based on microwave regeneration |
-
2019
- 2019-03-21 CN CN201910215862.9A patent/CN109759008A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| IKRAM DAOU ET AL.: "Study of the effect of an acid treatment of a natural Moroccan bentonite on its physicochemical and adsorption properties", 《WATER SCIENCE & TECHNOLOGY》 * |
| 孙志顺等: "《河南省非金属矿产开发利用指南》", 31 October 2001, 北京：地质出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113976092A (en) * | 2021-11-24 | 2022-01-28 | 辽宁大学 | Method for treating organic pollutant wastewater by using iron-modified sodium montmorillonite based on microwave regeneration |
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