CN104028212A - Preparation method of organic modified bentonite for adsorbing thiocyanate ions - Google Patents
Preparation method of organic modified bentonite for adsorbing thiocyanate ions Download PDFInfo
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- CN104028212A CN104028212A CN201410285050.9A CN201410285050A CN104028212A CN 104028212 A CN104028212 A CN 104028212A CN 201410285050 A CN201410285050 A CN 201410285050A CN 104028212 A CN104028212 A CN 104028212A
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Abstract
The invention discloses a preparation method of organic modified bentonite for adsorbing thiocyanate ions. According to the technical scheme, the organic modified bentonite comprises 50-70 percent of sodium bentonite, 20-38 percent of hexadecyl trimethyl ammonium bromide and 1-16 percent of tetramethyl ammonium chloride. The preparation method comprises the following steps: weighing hexadecyl trimethyl ammonium bromide and tetramethylammonium chloride according to a formula ratio and dissolving in 200 ml of distilled water, and stirring at a temperature of 16 DEG C for 30min to prepare a solution A; weighing sodium bentonite according to the formula ratio and adding sodium bentonite in the solution A, and continuing stirring at a rotating speed of 160 r/min for 1 h to prepare a solution B; and filtering the solution B, then repeatedly washing the obtained filter slag by using the distilled water until no bromide ion or chorine ion exists, performing vacuum filtration to obtain a filter cake, drying the filter cake at a temperature of 75 DEG C for 24 h, and grinding the obtained solid into powder with a particle size of not more than 100 microns. The preparation method has the following beneficial effects that the bentonite which is abundant in the nature is used as a raw material and is low in cost, and the bentonite which is organically modified can be widely applied to the adsorption and the treatment of toxic inorganic matters in industrial wastewater such as electroplating, coking, metal smelting, pesticide and dyeing.
Description
Technical field
The present invention relates to sewage, technical field of waste water processing, relate in particular to a kind of for adsorbing the preparation method of organic modified bentonite of thiocyanate ion.
Background technology
Rhodanide is as the core component of coking chemical waste water pollutant, and the mass concentration in waste water reaches 200-1000mg/L, is the inorganic pollution that content is the highest.
Bentonite is a kind of nonmetal clay class mineral, and its main mineralogical composition is montmorillonite.Montmorillonite is by the octahedra 2:1 layer aluminosilicate clay mineral forming of Al-O of two Si-O tetrahedron therebetween, this special construction of montmorillonite just, that bentonite has stronger adsorptivity, dilatancy and ion exchangeable, but the Si-O structure on natural montmorillonite surface makes its hydrophilic oleophobic, there is no remarkable effect for the absorption of poisonous inorganic pollution thiocyanate ion in coking chemical waste water.
Summary of the invention
In order to address the above problem, the object of this invention is to provide a kind of preparation method of organic modified bentonite that is widely used in poisonous inorganic matter adsorption treatment in the industrial wastewaters such as plating, coking, metal smelt, agricultural chemicals, printing and dyeing.
To achieve these goals, technical scheme of the present invention is achieved in that a kind of for adsorbing the preparation method of organic modified bentonite of thiocyanate ion, and the composition by weight of its each composition of filling a prescription and production operation step are as follows:
Title components by weight percent
Sodium bentonite 50%-75%
Softex kw 20%-38%
Tetramethyl ammonium chloride 1%-16%.
1, the described softex kw and the tetramethyl ammonium chloride that take formula ratio are dissolved in 200ml distilled water, at 16 DEG C, stir 30min, make mixed solution A;
2, the described sodium bentonite that takes again formula ratio adds in described mixed solution A, continues to stir 1h with the rotating speed of 160r/min, makes mixed solution B;
3, described mixed solution B is filtered, then gained filter residue is used to distilled water cyclic washing until exist without bromide ion and chlorion, through vacuum filtration, gained filter cake is dried 24h at 75 DEG C, and the solid abrasive obtaining becomes granularity≤100 object powder.
Further, the composition by weight of its each composition of filling a prescription is as follows:
Title components by weight percent
Sodium bentonite 69%
Softex kw 27.6%
Tetramethyl ammonium chloride 3.4%.
Further, described sodium bentonite, cation exchange capacity is 110mol/kg.
The present invention has following beneficial effect: with the abundant bentonite raw material the most of occurring in nature reserves, with low cost, utilize long and short carbochain cationic surfactant softex kw and tetramethyl ammonium chloride jointly to carry out organically-modified to bentonite, can be widely used in the adsorption treatment of poisonous inorganic matter in the industrial wastewaters such as plating, coking, metal smelt, agricultural chemicals, printing and dyeing, adsorption rate is very high, and adsorption process is spontaneous carries out.
Detailed description of the invention
The present embodiment is a kind of for adsorbing the preparation method of organic modified bentonite of thiocyanate ion, and the composition by weight of its each composition of filling a prescription and production operation step are as follows:
Title components by weight percent
Sodium bentonite 50%-75%
Softex kw 20%-38%
Tetramethyl ammonium chloride 1%-16%.
1, the described softex kw and the tetramethyl ammonium chloride that take formula ratio are dissolved in 200ml distilled water, at 16 DEG C, stir 30min, make mixed solution A;
2, the described sodium bentonite that takes again formula ratio adds in described mixed solution A, continues to stir 1h with the rotating speed of 160r/min, makes mixed solution B;
3, described mixed solution B is filtered, then gained filter residue is used to distilled water cyclic washing until exist without bromide ion and chlorion, through vacuum filtration, gained filter cake is dried 24h at 75 DEG C, and the solid abrasive obtaining becomes granularity≤100 object powder.
Embodiment 1:
For adsorbing a preparation method of organic modified bentonite for thiocyanate ion, the composition by weight of its each composition of filling a prescription and production operation step are as follows:
Title components by weight percent
Sodium bentonite 69%
Softex kw 27.6%
Tetramethyl ammonium chloride 3.4%.
1, the described softex kw and the tetramethyl ammonium chloride that take formula ratio are dissolved in 200ml distilled water, at 16 DEG C, stir 30min, make mixed solution A;
2, the described sodium bentonite that takes again formula ratio adds in described mixed solution A, continues to stir 1h with the rotating speed of 160r/min, makes mixed solution B;
3, described mixed solution B is filtered, then gained filter residue is used to distilled water cyclic washing until exist without bromide ion and chlorion, through vacuum filtration, gained filter cake is dried 24h at 75 DEG C, and the solid abrasive obtaining becomes granularity≤100 object powder.
Embodiment 2:
Take respectively 0.5g, 1.5g, the organic modified bentonite of 2.5g, joining respectively 100ml mass concentration is in the thiocyanate solion of 0.05g/L, at 25 DEG C, adsorb 1h with PH=7 with 160r/min vibration, result shows, in the solution 100ml that thiocyanate mass of ion concentration is 0.05g/L, while adding organic modified bentonite quality to be 0.5g, just can reach more than 90% the adsorption rate of thiocyanate ion, along with adding quality, organic modified bentonite increases, adsorption rate to thiocyanate ion further increases, in the time adding quality to reach 1.5g, adsorption rate reaches 97.05%, increase again organic modified bentonite quality little on adsorption effect impact.Therefore,, in the thiocyanate solion that 100ml mass concentration is 0.05g/L, preferably adding organic modified bentonite quality is 1.5g.
Embodiment 3:
1, accurately take respectively organic modified bentonite and the bentonite original soil that 1.5g embodiment 1 makes, joining respectively 100ml mass concentration is in the thiocyanate solion of 0.05g/L, in constant temperature oscillator, at 25 DEG C, adsorb 1h with 160r/min vibration, then separate with rotating speed 6000r/min high speed centrifugation.
2, accurately measure the two kind solution of 50ml after centrifugal, be placed in respectively 100ml volumetric flask, respectively adding 5ml mass concentration is the iron nitrate solution of 100g/L, then with distilled water diluting to 100ml.
3, measure with uv-spectrophotometric instrument, result shows, bentonite original soil is only 15.05% to the adsorption rate of thiocyanate ion, and the present invention's organobentonite after softex kw and tetramethyl ammonium chloride modification improves greatly to inorganic anion pollutant absorption property, to the adsorption rate of thiocyanate ion up to 97.05%.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, other amendments that those of ordinary skill in the art make technical scheme of the present invention or be equal to replacement, only otherwise depart from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of claim scope of the present invention.
Claims (4)
1. for adsorbing a preparation method of organic modified bentonite for thiocyanate ion, it is characterized in that, the composition by weight of its each composition of filling a prescription and production operation step are as follows:
Title components by weight percent
Sodium bentonite 50%-75%
Softex kw 20%-38%
Tetramethyl ammonium chloride 1%-16%.
The described softex kw and the tetramethyl ammonium chloride that 2.(1) take formula ratio are dissolved in 200ml distilled water, at 16 DEG C, stir 30min, make mixed solution A;
(2) the described sodium bentonite that takes again formula ratio adds in described mixed solution A, continues to stir 1h with the rotating speed of 160r/min, makes mixed solution B;
(3) described mixed solution B is filtered, then gained filter residue is used to distilled water cyclic washing until exist without bromide ion and chlorion, through vacuum filtration, gained filter cake is dried 24h at 75 DEG C, and the solid abrasive obtaining becomes granularity≤100 object powder.
3. according to claim 1 a kind ofly it is characterized in that for adsorbing the preparation method of organic modified bentonite of thiocyanate ion, the composition by weight of its each composition of filling a prescription is as follows:
Title components by weight percent
Sodium bentonite 69%
Softex kw 27.6%
Tetramethyl ammonium chloride 3.4%.
4. according to claim 1 a kind ofly it is characterized in that for adsorbing the preparation method of organic modified bentonite of thiocyanate ion, described sodium bentonite, cation exchange capacity 110mol/kg.
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| CN201410285050.9A CN104028212A (en) | 2014-06-24 | 2014-06-24 | Preparation method of organic modified bentonite for adsorbing thiocyanate ions |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106111068A (en) * | 2016-07-29 | 2016-11-16 | 卢挺 | Preparation method for the organically-modified silicic acid magnalium that waste water processes |
| CN106179232A (en) * | 2016-07-14 | 2016-12-07 | 仇颖莹 | A kind of polymolecularity method for preparing organobentonite |
| CN113680312A (en) * | 2021-08-27 | 2021-11-23 | 西南石油大学 | Preparation method of alkyl ammonium chloride modified sodium bentonite and application of alkyl ammonium chloride modified sodium bentonite in treatment of petroleum wastewater |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101182002A (en) * | 2007-10-26 | 2008-05-21 | 江苏工业学院 | Method for synthesizing organic bentonite by ultrasonic wave combined with microwave |
| CN103214054A (en) * | 2013-01-04 | 2013-07-24 | 太原理工大学 | Method for removing thiocyanate ions from water |
-
2014
- 2014-06-24 CN CN201410285050.9A patent/CN104028212A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101182002A (en) * | 2007-10-26 | 2008-05-21 | 江苏工业学院 | Method for synthesizing organic bentonite by ultrasonic wave combined with microwave |
| CN103214054A (en) * | 2013-01-04 | 2013-07-24 | 太原理工大学 | Method for removing thiocyanate ions from water |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106179232A (en) * | 2016-07-14 | 2016-12-07 | 仇颖莹 | A kind of polymolecularity method for preparing organobentonite |
| CN106111068A (en) * | 2016-07-29 | 2016-11-16 | 卢挺 | Preparation method for the organically-modified silicic acid magnalium that waste water processes |
| CN113680312A (en) * | 2021-08-27 | 2021-11-23 | 西南石油大学 | Preparation method of alkyl ammonium chloride modified sodium bentonite and application of alkyl ammonium chloride modified sodium bentonite in treatment of petroleum wastewater |
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Application publication date: 20140910 |