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Preparation method for concave-convex stick clay soil/polyacrylamide composite adsorption agent

A technology of attapulgite clay and composite adsorption, which is applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of long cycle, complicated preparation steps, obstacles, etc., and achieves the effects of fewer preparation steps, low preparation cost, and simple process.

Inactive Publication Date: 2009-01-14
HUAIYIN TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] At present, the modification of attapulgite clay mainly includes acid treatment, alkali treatment, and organic ammonium salt treatment. It has been reported in the literature that polyacrylamide is grafted by atom transfer radical surface-initiated polymerization. Ions form covalent bonds to achieve the purpose of removing mercury ions, but the preparation steps are cumbersome and the cycle is long, which sets certain obstacles for its application

Method used

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  • Preparation method for concave-convex stick clay soil/polyacrylamide composite adsorption agent
  • Preparation method for concave-convex stick clay soil/polyacrylamide composite adsorption agent
  • Preparation method for concave-convex stick clay soil/polyacrylamide composite adsorption agent

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1: prepare composite adsorbent according to the following steps:

[0027] ①Dry the attapulgite clay at 105°C to constant weight, crush it through 200 meshes; put 3.0 g of the dried attapulgite clay in a beaker, add 1.0 mL of distilled water and 50.0 mL of toluene successively, and drop 1.0 mL of it under magnetic stirring γ-(Methacryloyloxy)propyltrimethoxysilane was reacted in ultrasonic waves at 30°C for 30 minutes; reacted in a magnetic stirring constant temperature oil bath at 40°C for 3 hours; the reaction product was washed with toluene and absolute ethanol successively Wash with deionized water three times, bake at 105°C to constant weight, and grind to 200 mesh to obtain modified attapulgite clay;

[0028] ② Dissolve 2.0 grams of modified attapulgite clay in 50 mL of toluene in a container, add 0.3 grams of acrylamide and 0.05 grams of azobisisobutyronitrile successively under nitrogen protection conditions, and stir in a constant temperature oil at 6...

Embodiment 2

[0029] Embodiment 2: prepare composite adsorbent according to the following steps:

[0030] ①Dry the attapulgite clay at 105°C to constant weight, crush it through 200 meshes; put 4.0 grams of dried attapulgite clay in a beaker, add 1.5mL of distilled water and 100mL of toluene successively, and drop 3.0mL of γ-(methacryloyloxy)propyltrimethoxysilane was reacted in 40°C ultrasonic wave for 40 minutes; it was reacted in a 40°C magnetic stirring constant temperature oil bath for 4 hours; the reaction product was successively washed with toluene, absolute ethanol and Wash with deionized water three times, bake at 105°C to constant weight, and grind to 200 mesh to obtain modified attapulgite clay;

[0031] ② Dissolve 2.0 grams of modified attapulgite clay in 100 mL of toluene in a container, add 1.1 grams of acrylamide and 0.125 grams of azobisisobutyronitrile successively under the condition of nitrogen protection, and stir in a constant temperature oil bath with magnetic force a...

example 3

[0032] Example 3: Prepare composite adsorbent according to the following steps:

[0033] ①Dry the attapulgite clay at 105°C to constant weight, crush it through 200 meshes; put 5.0 g of the dried attapulgite clay in a beaker, add 2.0 mL of distilled water and 150 mL of toluene successively, and drop in 5.0 mL of γ-(Methacryloyloxy)propyltrimethoxysilane was reacted in ultrasonic waves at 50°C for 50 minutes; it was reacted in a magnetic stirring constant temperature oil bath at 60°C for 5 hours; the reaction product was washed with toluene, absolute ethanol and Wash with deionized water three times, bake at 105°C to constant weight, and grind to 200 mesh to obtain modified attapulgite clay;

[0034] ② Dissolve 2.0 grams of modified attapulgite clay in 500 mL of toluene in a container, add 2.0 grams of acrylamide and 0.2 grams of azobisisobutyronitrile successively under the condition of nitrogen protection, and stir in a constant temperature oil at 100 ° C. Reaction in the ba...

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Abstract

The invention discloses a method to prepare an attapulgite clay / polyacrylamide compound adsorbent. Coupling agent is adopted to react with the attapulgite clay to achieve surface functionalization, and thereby, modified attapulgite clay with a hydrophobic vinyl functional group surface is prepared; under the protection of inert gas, graft copolymerization of the modified attapulgite clay and acrylamide is conducted by solution polymerization to achieve compound adsorbent with amido functional group. The preparation method is simple and easy to operate, and has a wide prospect of application; the compound adsorbent has excellent adsorbing performance to mercury and other heavy-metal ions which can have chelate reaction with amido. When pH is 4.4, the adsorptive capacity to mercury ion is 10-15 times higher than the former attapulgite clay; when pH is 2.0, during the adsorption in the mixed-ion solution of mercury and chromium, the adsorbent has sound selective adsorption capacity to Hg<2+>.

Description

technical field [0001] The invention relates to a preparation method of an attapulgite clay adsorbent, in particular to a preparation method of an attapulgite clay / polyacrylamide composite adsorbent. Background technique [0002] With the rapid development of my country's economy and the urgent need to build an ecological society, the problem of heavy metal pollution in water bodies has attracted increasing attention. At present, the methods to deal with heavy metal pollution mainly include precipitation method, ion exchange method, extraction method, membrane separation method and adsorption method. Adsorption, as an important chemical and physical method, is widely used in the water treatment process, and the selection and development of adsorption materials is one of the key factors in the development of adsorption water treatment technology. [0003] Attapulgite clay [Si 8 Mg 5 o 20 (OH) 2 (OH 2 ) 4 4H 2 O] is a hydrous-rich magnesium-aluminosilicate mineral, and...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/12B01J20/30
Inventor 赵宜江陈岩周守勇褚效中李梅生邢卫红
Owner HUAIYIN TEACHERS COLLEGE
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