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Modified attapulgite clay and preparation method thereof

A modified technology of attapulgite clay, applied in chemical instruments and methods, other chemical processes, inorganic chemistry, etc., can solve the problems of limited adsorption effect of metal strontium ions, achieve good adsorption effect, change surface structure, and improve adsorption performance effect

Active Publication Date: 2020-05-05
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the limited adsorption effect of the existing attapulgite clay modification method for metal strontium ions, thereby providing a new modified attapulgite clay and its preparation method

Method used

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  • Modified attapulgite clay and preparation method thereof
  • Modified attapulgite clay and preparation method thereof
  • Modified attapulgite clay and preparation method thereof

Examples

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Effect test

Embodiment 1

[0031] A preparation method of modified attapulgite clay, comprising the steps:

[0032] 1) Purification of attapulgite clay:

[0033] a) Pulverize 2g of attapulgite clay with a pulverizer, pass through a 100-mesh sieve, then place it in a 200ml beaker, add 80g of deionized water and 0.06g of sodium hexametaphosphate, and magnetically stir for 30min to obtain a mixed solution;

[0034] b) Disperse the mixed solution in an ultrasonic instrument at 25°C for 1 hour, take it out, place it in a centrifuge tube, and centrifuge it at a speed of 3300 rpm for 15 minutes to obtain dehydrated attapulgite clay, and place the dehydrated attapulgite clay in Dry in an oven at 105°C for 3 hours to obtain dried attapulgite clay, grind and pulverize the dried attapulgite clay, and pass through a 100-mesh sieve to obtain purified attapulgite clay. Put the stone clay in a ziplock bag and keep it sealed for later use;

[0035] 2) Weigh 0.8g of cetyltrimethylammonium bromide, place it in 80ml of ...

Embodiment 2

[0038] A preparation method of modified attapulgite clay, comprising the steps:

[0039] 1) Purification of attapulgite clay:

[0040] a) Pulverize 2g of attapulgite clay with a pulverizer, pass through a 100-mesh sieve, then place it in a 200ml beaker, add 80g of deionized water and 0.06g of sodium hexametaphosphate, and magnetically stir for 30min to obtain a mixed solution;

[0041] b) Disperse the mixed solution in an ultrasonic instrument at 25°C for 1 hour, take it out, place it in a centrifuge tube, and centrifuge it at a speed of 3300 rpm for 15 minutes to obtain dehydrated attapulgite clay, and place the dehydrated attapulgite clay in Dry in an oven at 105°C for 3 hours to obtain dried attapulgite clay, grind and pulverize the dried attapulgite clay, and pass through a 100-mesh sieve to obtain purified attapulgite clay. Put the stone clay in a ziplock bag and keep it sealed for later use;

[0042] 2) Weigh 0.8g of cetyltrimethylammonium bromide, place it in 80ml of ...

Embodiment 3

[0045] A preparation method of modified attapulgite clay, comprising the steps:

[0046] 1) Weigh 0.8g cetyltrimethylammonium bromide, place it in 80ml absolute ethanol, stir to dissolve cetyltrimethylammonium bromide in absolute ethanol to obtain hexadecyltrimethylammonium bromide Trimethylammonium bromide ethanol solution;

[0047] 2) Add 2g attapulgite clay to cetyltrimethylammonium bromide ethanol solution, stir for 3 hours, then add phosphomolybdic acid aqueous solution (the concentration of phosphomolybdic acid in the described phosphomolybdic acid aqueous solution is 0.20mol / L, the mol ratio of phosphomolybdic acid and cetyltrimethylammonium bromide in the described phosphomolybdic acid aqueous solution is 1: 1.2), continue to stir for 3 hours, carry out sonication after stirring (the sonication temperature is 25°C, the ultrasonic time is 3 hours), the solution after ultrasonic treatment is suction filtered, and the filter cake is washed with deionized water until the...

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Abstract

The invention relates to the technical field of sewage treatment, in particular to modified attapulgite clay and a preparation method thereof. The preparation method of the modified attapulgite clay provided by the invention comprises the following steps: putting hexadecyl trimethyl ammonium bromide into ethanol, and performing stirring to obtain a hexadecyl trimethyl ammonium bromide ethanol solution; and adding attapulgite clay into the hexadecyl trimethyl ammonium bromide ethanol solution, performing stirring, and carrying out ultrasonic treatment after stirring, thereby obtaining the modified attapulgite clay. According to the preparation method of the modified attapulgite clay provided by the invention, the surface structure of the attapulgite clay can be effectively changed, and theadsorption performance of the attapulgite clay on heavy metal ions strontium is improved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a modified attapulgite clay and a preparation method thereof. Background technique [0002] Attapulgite clay is a kind of hydrous magnesium-aluminosilicate fibrous clay mineral, which has a unique chain-layer crystal structure. Mineralogically, it belongs to sepiolite. The surface area is large, and the rectangular inner pores are relatively developed (0.38nm×0.63nm), which can effectively fix many metals and their oxides. At the same time, the surface of attapulgite clay is rich in active groups such as silicon hydroxyl groups, which makes it have good adsorption Performance, widely used in wastewater treatment, catalysis and other fields. However, the viscosity of natural attapulgite clay is mostly low-to-medium grade, and it contains a large amount of impurities, which interferes with the excellent performance of attapulgite clay itself. If it is directly applied to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28C01B33/40C02F101/20
CPCB01J20/12C01B33/40C02F1/281C02F2101/20
Inventor 左锐杜璨何柱锟林元惠杨岩飞王金生
Owner BEIJING NORMAL UNIVERSITY
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