CN103157432A - Method for preparing high-efficiency anionic and cationic clay complex adsorbent - Google Patents
Method for preparing high-efficiency anionic and cationic clay complex adsorbent Download PDFInfo
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- CN103157432A CN103157432A CN2013100981188A CN201310098118A CN103157432A CN 103157432 A CN103157432 A CN 103157432A CN 2013100981188 A CN2013100981188 A CN 2013100981188A CN 201310098118 A CN201310098118 A CN 201310098118A CN 103157432 A CN103157432 A CN 103157432A
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Abstract
The invention relates to a method for preparing a high-efficiency zwitterion clay complex adsorbent. The method comprises the following steps of: fully mixing anionic clay, cationic clay and CO2-removed deionized water according to a certain ratio under the action of high shearing dispersion force, so as to form a nanoscale uniform complex, wherein the pore size distribution of the complex has the double-mesoporous characteristic. The preparation method has the advantages of being easy and feasible in operation process, environment-friendly and the like, and the formed complex is the high-performance anion adsorbent.
Description
Technical field
The water environment pollution that industrialization development causes constitutes a serious threat to human health and ecological safety.At utmost removing the various poisonous and harmful substances in waste water, is an urgent demand of water environment protection.Existing multiple technologies such as the precipitation method, absorption method, anti-phase osmosis and biochemical process etc. are used for water treatment, and wherein absorption method, technique low because of adsorbent wide material sources, cost is simple obtains extensive use.Existing adsorbent mostly is the one pack system adsorbent, and its adsorption capacity, adsorptive selectivity and physical property all have deficiency to a certain degree.Development multi-component high-efficient adsorbent is the important channel of improving water treatment efficiency.The compound-type adsorbent that is formed by two or more adsorbent, each component may realize rebuilding in the certain space range scale at aspects such as chemical composition, structure, pore structures, show the physical and chemical performance that is different from one-component that causes because of cooperative effect, significantly improve absorption property.
Background technology
Anionic clay claims again hydrotalcite-type compound, and tool is similar to the layer structure of shepardite, and laminate is positively charged, and interlayer has tradable anion, is the important anion adsorbent of a class, is widely used in the fields such as environment remediation, wastewater treatment.Cationic clay, with anionic clay comparatively speaking, refer generally to natural layer silicate clay mineral, laminate is electronegative, interlayer is filled with tradable cation, by the adsorbable cation of ion-exchange.Modify or the aspect scission of link also can have certain Anion-adsorption ability by interlayer.The present invention's cationic clay used refers to montmorillonite mineral.
Take the Phosphate Sorption acid group as example, anionic clay hydrotalcite adsorbance is 7.3-81.6 mg.g-1, and the montmorillonite adsorbance is＜0.5 mg.g-1.The zwitterion clay all has higher specific area, chemism and excellent ion exchangeable.As both are combined into nano complex, the performance cooperative effect can obtain the adsorbent more excellent than the one-component performance of the adsorbent.
The zwitterion clay is because grain size is little large with specific area, be difficult for disperseing, mechanical agitation method as directly both being used is mixed, the mixture that forms is extremely inhomogeneous two-phase mixture on micro-scale, each self-forming of hydrotalcite and montmorillonite is aggregate independently, be the mechanical impurity on macroeconomic significance, can not be called complex, also do not possess collaborative adsorption effect.
Summary of the invention
Purpose of the present invention: the preparation method that a kind of efficient zwitterion clay complex adsorbent is provided.Layer structure
Anionic clay and cationic clay are in the aqueous solution, shear by high strength the shear energy that dispersion force produces, aggregate separately is able to fully disperse to dissociate, under electrostatic force between end face-end face, aspect-end face and aspect-aspect, forms a kind of even complex of nanoscale.The two mesoporous apertures of gained complex tool feature shows excellent adsorpting anion performance, is a kind of novel green high-efficiency adsorbent.This preparation method has the simple and eco-friendly characteristics of technique.
Embodiment 1: steps A: with 0.075mol Mg (NO
3)
2.6H
2O and 0.025mol Al (NO
3)
3.9H
2O is dissolved in the 150mL deionized water, forms A liquid.After dropwise joining A liquid in 50 mL 2 M NaOH solution, 60
℃Be incubated 3 hours.Continue to pass into nitrogen and strong agitation in course of reaction in solution.The product filtration drying gets anionic clay Mg-Al hydrotalcite.Step B: with Mg-Al hydrotalcite, montmorillonite with take off the CO2 deionized water in mass ratio for 1:1:100 joins in container, stir with high shear mixer, regulate the mixer rotating speed greater than 8000 rpm, mixing time 1 hour.Step C: the product suction filtration after stirring is drying to obtain zwitterion clay complex adsorbent.Step D: with above-mentioned adsorbent and phosphate radical solution effects, carry out isothermal adsorption, adsorbance is 151.9 mg.g-
1
Embodiment 2: steps A: with 0.075mol Mg (NO
3)
2.6H
2O and 0.025mol Al (NO
3)
3.9H
2O is dissolved in the 150mL deionized water, forms A liquid.After dropwise joining A liquid in 50 mL 2 M NaOH solution, 60
℃Be incubated 3 hours.Continue to pass into nitrogen and strong agitation in course of reaction in solution.The product filtration drying gets anionic clay Mg-Al hydrotalcite.Step B: with Mg-Al hydrotalcite, montmorillonite with take off the CO2 deionized water in mass ratio for 1:1:200 joins in container, stir with high shear mixer, regulate the mixer rotating speed greater than 8000 rpm, mixing time 1 hour.Step C: the product suction filtration after stirring is drying to obtain zwitterion clay complex adsorbent.Step D: with above-mentioned adsorbent and phosphate radical solution effects, carry out isothermal adsorption, adsorbance is 153.6 mg.g-
1
From the scanning electron microscope (SEM) photograph (Fig. 1) of the embodiment of the present invention 1, the visible nearly tabular Mg-Al hydrotalcite of hexagon crystal is evenly distributed on irregular montmorillonite thin slice, forms the nanoscale complex.From the graph of pore diameter distribution (Fig. 2) of the embodiment of the present invention 1 as can be known, the two meso pore characteristics of complex tool.
Fig. 1 is zwitterion clay complex adsorbent scanning electron microscope (SEM) photograph.
Fig. 2 is zwitterion clay complex adsorbent graph of pore diameter distribution.
Claims (6)
1. the preparation method of an efficient zwitterion clay complex adsorbent, is characterized in that anionic clay, cationic clay and take off CO
2Deionized water, is fully mixed under the effect of high shear dispersion force with certain proportion, forms the even complex of nanoscale, the two meso pore characteristics of complex tool.
2. anionic clay according to claim 1 and cationic clay, refer to respectively Mg-Al hydrotalcite and montmorillonite.
3. certain proportion according to claim 1, refer to that mass ratio is (Mg-Al hydrotalcite): (montmorillonite): (H
2O)=1:1:100 or 2:1:100.
4. high shear dispersion force according to claim 1 refers to the active force that is produced greater than the high shear mixer of 8000 rpm by rotating speed.
5. the even complex of nanoscale according to claim 1, referring to amplify 10000-50000 under electron microscope doubly observes, anionic clay and cationic clay be Uniform Dispersion each other, without obvious anionic clay aggregate and/or cationic clay aggregate, the two meso pore characteristics of pore-size distribution tool.
6. the saturated extent of adsorption q of high efficiency composition body adsorbent Phosphate Sorption acid group according to claim 1
mGreater than 150.0mg.g-1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100981188A CN103157432A (en) | 2013-03-25 | 2013-03-25 | Method for preparing high-efficiency anionic and cationic clay complex adsorbent |
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|---|---|---|---|
| CN2013100981188A CN103157432A (en) | 2013-03-25 | 2013-03-25 | Method for preparing high-efficiency anionic and cationic clay complex adsorbent |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104924706A (en) * | 2015-05-20 | 2015-09-23 | 北京化工大学 | Preparation method for composite material with hydrotalcite-imvite laminate alternating structure |
| CN105170076A (en) * | 2015-07-14 | 2015-12-23 | 江苏城市职业学院 | Montmorillonite-based layered double hydroxide polymerization nanometer material, preparation and applications thereof |
| CN107913723A (en) * | 2017-12-08 | 2018-04-17 | 山东理工大学 | NiAl-HTLcs film of three-dimensional containing chromium and preparation method and application |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020159940A1 (en) * | 2001-02-09 | 2002-10-31 | Dennis Stamires | Doped anionic clays |
| CN1600987A (en) * | 2004-10-10 | 2005-03-30 | 山东轻工业学院 | Method for raising rate of retaining paper stock |
| CN1972991A (en) * | 2004-06-23 | 2007-05-30 | 阿克佐诺贝尔股份有限公司 | Polymer-containing composition, its preparation and use |
-
2013
- 2013-03-25 CN CN2013100981188A patent/CN103157432A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020159940A1 (en) * | 2001-02-09 | 2002-10-31 | Dennis Stamires | Doped anionic clays |
| CN1972991A (en) * | 2004-06-23 | 2007-05-30 | 阿克佐诺贝尔股份有限公司 | Polymer-containing composition, its preparation and use |
| CN1600987A (en) * | 2004-10-10 | 2005-03-30 | 山东轻工业学院 | Method for raising rate of retaining paper stock |
Non-Patent Citations (1)
| Title |
|---|
| 付盈: "水滑石/蒙脱石复合体对磷酸根离子吸附性能的研究", 《中国优秀硕士学位论文全文数据库工程科技（Ⅰ）辑》, 15 December 2012 (2012-12-15) * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104924706A (en) * | 2015-05-20 | 2015-09-23 | 北京化工大学 | Preparation method for composite material with hydrotalcite-imvite laminate alternating structure |
| CN104924706B (en) * | 2015-05-20 | 2016-11-30 | 北京化工大学 | A kind of preparation method of brucite-montmorillonite laminate alternating structure composite |
| CN105170076A (en) * | 2015-07-14 | 2015-12-23 | 江苏城市职业学院 | Montmorillonite-based layered double hydroxide polymerization nanometer material, preparation and applications thereof |
| CN105170076B (en) * | 2015-07-14 | 2018-07-03 | 江苏城市职业学院 | A kind of montmorillonite-base layered double-hydroxide polymer/nanometer material, preparation and application |
| CN107913723A (en) * | 2017-12-08 | 2018-04-17 | 山东理工大学 | NiAl-HTLcs film of three-dimensional containing chromium and preparation method and application |
| CN107913723B (en) * | 2017-12-08 | 2020-06-23 | 山东理工大学 | Chromium-containing three-dimensional nickel-aluminum hydrotalcite-like film and preparation method and application thereof |
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Application publication date: 20130619 |