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Preparation method and application of magnetic modified bentonite adsorbent

A technology of bentonite and adsorbent is applied in the field of preparation of magnetically modified bentonite adsorbent, which can solve the problems of inability to achieve ferric oxide pillared magnetic bentonite, large specific surface area of ​​bentonite, high price of zirconium, etc., and achieve excellent cation exchange performance. , Large specific surface area, good adsorption effect

Inactive Publication Date: 2017-07-25
BAOJI UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, CN103566866A discloses a method for preparing magnetic bentonite for removing MC-LR, and discloses a method for preparing a new type of magnetic bentonite through hydrothermal synthesis technology. The bentonite prepared by this method has a large specific surface area and has a super Paramagnetic, but due to the high price of zirconium, the cost of using its pillars is high, and the method is cumbersome, so its application in industry is limited
CN104891513B discloses a method for preparing magnetic bentonite by a hydrothermal method. During the preparation process, the adsorption performance and superparamagnetism of the product are improved by adding ethylenediamine, but this patented technology cannot achieve the effect of ferric iron tetroxide pillared magnetic bentonite

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  • Preparation method and application of magnetic modified bentonite adsorbent
  • Preparation method and application of magnetic modified bentonite adsorbent
  • Preparation method and application of magnetic modified bentonite adsorbent

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 1. Preparation of Magnetically Modified Bentonite Adsorbent

[0035] Weigh 5.4g of FeCl 3 ·6H 2 O was dissolved in 100mL of ethylene glycol, stirred for 1h, and the constant stirring speed was 400 rpm), then added 9.0g of sodium acetate, stirred for 2h, then added 1.25g of trisodium citrate, stirred evenly for 5h, and obtained yellowish brown Suspension: add heat activation (activation temperature is 350 ℃, time is 1.5h) and acid activation (activate it with hydrochloric acid whose concentration is 3wt%) to the above-mentioned yellowish brown suspension liquid, hydrochloric acid and heat activation The liquid-solid mass ratio of the bentonite after is 15:1, at 100 DEG C, the stirring speed is controlled at 400 revolutions / min, and the stirring time is 8h) after 1.333g of bentonite, the stirring speed is continued to be controlled, and the mixing and stirring is carried out for 3h to obtain a suspension Encapsulate the above suspension in a polytetrafluoroethylene reac...

Embodiment 2

[0072] 1. Preparation of magnetically modified bentonite adsorbent

[0073] Weigh 10.8g of FeCl 3 ·6H 2 O was dissolved in 200mL of ethylene glycol, stirred for 2h, and the constant stirring speed was 400 rpm), then added 18.0g of sodium acetate, stirred for 3h, then added 2.5g of trisodium citrate, stirred evenly for 6h, and obtained yellowish brown Suspension: add heat-activated (activation temperature is 380 ℃, time is 1h), acid activation (with the concentration of 2wt% hydrochloric acid to activate it, hydrochloric acid and heat-activated The liquid-solid mass ratio of bentonite is 18:1, and at a temperature of 90°C, the stirring speed is controlled at 400 rpm, and the stirring time is 9h). After 2.667g of bentonite, continue to control the stirring speed, and mix and stir for 3h to obtain a suspension; The above suspension was packaged in a polytetrafluoroethylene reactor, and reacted at 180°C for 15 hours; the black solid was washed 3 times with water and ethanol, mag...

Embodiment 3

[0078] 1. Preparation of magnetically modified bentonite adsorbent

[0079] Weigh 10g of FeCl 3 ·6H 2O was dissolved in 180mL of ethylene glycol, stirred for 3h, and the constant stirring speed was 400 rpm), then added 15.0g of sodium acetate, stirred for 2h, then added 2.0g of trisodium citrate, stirred evenly for 6h, and obtained yellowish brown Suspension: Add heat-activated (activation temperature: 350°C, time: 1.5h) and acid-activated (activated with hydrochloric acid with a concentration of 1wt%) to the above-mentioned yellow-brown suspension. After hydrochloric acid and heat-activated The liquid-solid mass ratio of the bentonite is 15:1, and the stirring speed is controlled at 400 rpm at a temperature of 80° C., and the stirring time is 10 h) after 2.3 g of the bentonite, the stirring speed is continued to be controlled, and the mixing and stirring is carried out for 2 h to obtain a suspension; The above suspension was packaged in a polytetrafluoroethylene reactor, an...

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Abstract

The invention provides a preparation method of magnetic modified bentonite. The method comprises the steps of mixing FeCl3.6H2O, sodium acetate, ethylene glycol and trisodium citrate and mixing and stirring for over 5h; adding bentonite subjected to thermal activation and acid activation and mixing and stirring for over 2 h; packaging a turbid liquid into a polytetrafluoroethylene reactor, reacting at 150-200 DEG C for over 10h; washing taken black solid by using water and ethanol for multiple times in cycle, carrying out magnetic separation, drying and grinding to obtain the magnetic modified bentonite. The removal rate of the magnetic modified bentonite on methylene blue reaches over 97%, and meanwhile, separation from a water body is facilitated by using the magnetism after adsorption. In addition, the magnetic modified bentonite is cheap and available in raw materials, simple in preparation technology, low in cost and beneficial to industrialization.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic adsorption materials, and in particular relates to a preparation method and application of a magnetically modified bentonite adsorbent. Background technique [0002] With the acceleration of urbanization and industrialization in China, the problem of water treatment is becoming more and more serious, and the dye wastewater produced in the textile industry is a common and cannot be ignored pollution problem. Most of the dyes are composed of harmful chemical substances (such as benzidine and metals, etc.), which have potential hazards of carcinogenicity and mutagenesis, and seriously threaten human life safety and health. [0003] The methods currently used for dye wastewater treatment include precipitation, membrane separation, ion exchange, reverse osmosis, microbial degradation, and photocatalytic degradation, etc. (Water Research 95 (2016) 59-89). Among them, adsorption technol...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/28B01J20/30C02F1/28
CPCB01J20/06B01J20/12B01J20/28009C02F1/281C02F2101/308
Inventor 王艳张喜娜王淑一赵磊吉智胡登卫翟乐
Owner BAOJI UNIV OF ARTS & SCI
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