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Preparation method and application of coated organic bentonite

A technology of bentonite and sodium-based bentonite is applied in the field of preparation of organobentonite, and can solve the problems of lack of film coating characteristics, unreported preparation method, lack of heavy metal ion adsorption efficiency, and lack of adsorption capacity, and achieves low cost, convenient operation, Strong adsorption effect

Inactive Publication Date: 2016-11-09
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The above-mentioned prior art is all about the research on the modification of bentonite. However, the above-mentioned modified bentonite does not have the characteristics of coating, and has a lack of adsorption efficiency and adsorption capacity for heavy metal ions.
There is no report about the preparation method of film-coated organically modified bentonite at present

Method used

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  • Preparation method and application of coated organic bentonite
  • Preparation method and application of coated organic bentonite
  • Preparation method and application of coated organic bentonite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation method of coated organic bentonite specifically comprises the following steps:

[0036] Mix 30g of cetyltrimethylammonium bromide, 50ml of absolute ethanol, and 450ml of deionized water to obtain mixed solution A; mix 30g of sodium bentonite with 500ml of mixed solution A, and place in a water bath at 60°C Shake for 2 hours, cool to room temperature, centrifuge the product, wash it with 10% ethanol solution and deionized water, and dry it in an oven at 80°C after suction filtration, grind through a 200-mesh sieve, and the solid part is organic Modified bentonite: uniformly mix 2ml of tri-n-octylamine and 10ml of sulfonated kerosene, and shake in a water bath at room temperature for 30 minutes to obtain coating solution B; take 2g of organic bentonite and 12ml of coating solution B to fully absorb, ultrasonically treat for 20min, and age After 10 hours, air-dry after centrifugal separation, and the solid part is coated organic bentonite.

[0037] The res...

Embodiment 2

[0041] The preparation method of coated organic bentonite specifically comprises the following steps:

[0042] Mix 10g of cetyltrimethylammonium bromide, 15ml of absolute ethanol, and 135ml of deionized water to obtain mixed solution A; mix 10g of sodium bentonite with 150ml of mixed solution A, and place in a water bath at 55°C Shake for 3 hours, cool to room temperature, centrifuge the product, wash it with 10% ethanol solution and deionized water, and dry it in an oven at 90°C after suction filtration, grind it through a 200-mesh sieve, and the solid part is organic Modified bentonite: uniformly mix 1ml of tri-n-octylamine and 6ml of sulfonated kerosene, and shake in a water bath at room temperature for 30 minutes to obtain coating solution B; take 1g of organic bentonite and 5ml of coating solution B to fully absorb, ultrasonically treat for 25min, and age After 12 hours, air-dry after centrifugation, and the solid part is coated organic bentonite.

[0043] Get cadmium-co...

Embodiment 3

[0046] In this embodiment, the composition of the coating solution is improved, and two additives are added to achieve better results, which specifically includes the following steps:

[0047] Preparation of film-coated bentonite: Mix 10g of cetyltrimethylammonium bromide, 15ml of absolute ethanol, and 135ml of deionized water to obtain mixed solution A; mix 10g of sodium-based bentonite with 150ml of mixed solution A, Shake in a water bath at 55°C for 3 hours, cool to room temperature and centrifuge the product, wash it once with 10% ethanol solution and deionized water, filter it with suction, dry it in an oven at 90°C, and grind it through a 200-mesh sieve , the solid part is organically modified bentonite; mix 1ml tri-n-octylamine, 0.5mL ethylenediamine, 0.2mL sorbitan monooleate (Span80) and 6ml sulfonated kerosene evenly, shake in a water bath at room temperature After 30 minutes, the coating solution B was obtained; 1g of organic bentonite was fully absorbed with 5ml of...

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Abstract

The invention discloses a preparation method and application of coated organic bentonite , and belongs to the technical field of preparation of organic bentonite. The technical problem that the adsorption rate of the organic bentonite is low in the prior art is solved. The preparation method comprises the following steps: first, evenly mixing cetyl trimethylammonium bromide, anhydrous ethanol and deionized water to obtain a mixed liquid A, evenly mixing the sodium bentonite and the obtained mixed liquid A and then vibrating in a water bath, cooling to room temperature and then centrifuging, washing, drying and sieving to obtain organic modified bentonite; then vibrating tri-n-octylamine and sulphonated kerosene at room temperature in a water bath to obtain a coated liquid B; finally, after fully adsorbing the organic modified bentonite and the coated liquid B, and subjecting to ultrasound and aging and other steps, obtaining coated organic bentonite. The coated organic bentonite prepared by the invention can be used for treating cadmium-containing wastewater, and has high adsorption capacity and large adsorption capacity.

Description

technical field [0001] The invention relates to the technical field of preparation of organic bentonite, in particular to a preparation method and application of film-coated organic bentonite. Background technique [0002] The treatment of low-concentration heavy metal wastewater is a difficult and complicated subject; at the same time, many heavy metals have important uses in industry. Therefore, one of the most effective ways to control heavy metal wastewater pollution is to separate, enrich and recycle resources, which not only controls pollution but also saves mineral resources. Separation and enrichment is one of the key steps in the resource utilization of heavy metals. Since Li N.N., a Chinese-American, invented the liquid membrane separation method in 1968, liquid membrane technology, especially emulsion liquid membrane technology, has been widely studied, involving heavy metals, rare earths, biochemical substances and many other fields. Liquid membrane separation ...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/32B01J20/34C02F1/28C02F101/20
CPCB01J20/12B01J20/22B01J20/3244B01J20/3295B01J20/34B01J2220/4806B01J2220/4812C02F1/288C02F2101/20
Inventor 周广柱尹鑫王翠珍杨翠英刘晓明程伟玉
Owner SHANDONG UNIV OF SCI & TECH
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