Preparation method and application of chitosan-ferrotitanium compound composite adsorbent

A compound, chitosan technology, applied in alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of low porosity and small surface area, achieve easy separation, increase adsorption capacity, and increase effective The effect of functional groups

Active Publication Date: 2017-08-15
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, chitosan materials have disadvantages such as small surf

Method used

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  • Preparation method and application of chitosan-ferrotitanium compound composite adsorbent
  • Preparation method and application of chitosan-ferrotitanium compound composite adsorbent

Examples

Experimental program
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Example Embodiment

[0022] Example 1

[0023] (1) Dissolve 2ml of titanium isopropoxide and 0.185g of dodecylamine in 80ml of ethylene glycol, add 0.46g of ferrous sulfate heptahydrate after stirring for 8 hours, continue to stir until it is dissolved, and obtain solution A. Then measure 170ml of acetone and 2.7ml of water and mix evenly to obtain solution B. Pour solution A into B and stir for 3h, then centrifuge to obtain a solid product, wash it with ethanol several times, and vacuum dry at 40~90℃ for 8-12h to obtain Iron titanium compound

[0024] (2) Dissolve 1.2g of chitosan in 60ml of 1% acetic acid aqueous solution, stir for 24h, add 0.2g of iron-titanium compound, continue to stir for 2h, then add dropwise to 100ml of 1% sodium hydroxide solution to obtain The spherical particles with a diameter of 2-4 mm are then repeatedly washed with distilled water until the pH is neutral, dried at 30° C. and then freeze-dried for 12 hours to obtain chitosan-iron-titanium compound composite microspheres....

Example Embodiment

[0026] Example 2

[0027] The specific preparation process is the same as in Example 1, but the addition amount of iron and titanium in step (2) is 0.4 g.

[0028] The adsorption performance test process is the same as in Example 1. The maximum adsorption capacity of the adsorbent for lead ions in the corresponding solution is 35.6 mg / g.

Example Embodiment

[0029] Example 3

[0030] The specific preparation process is the same as in Example 1, but the addition amount of iron and titanium in step (2) is 0.6 g.

[0031] Scanning electron microscopy test: The chitosan-iron-titanium compound composite microspheres prepared above were tested by scanning electron microscopy. The test results are as follows figure 1 Shown.

[0032] figure 1 The scanning electron micrograph of the chitosan-iron-titanium compound composite microsphere particles with 0.6g of iron-titanium compound in this example is shown. From the figure, it can be seen that the main structure of the chitosan-iron-titanium compound composite microsphere is composed of chitosan. The sugar supports and presents a network structure, the spherical iron-titanium compound microspheres are relatively uniformly dispersed in the chitosan, and the average diameter of FeTi nanoparticles is about 400-500nm.

[0033] The adsorption performance test process is the same as in Example 1. The ma...

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Abstract

The invention discloses a preparation method and application of a chitosan-ferrotitanium compound composite adsorbent, and belongs to the technical field of adsorbents. The preparation method specifically comprises the following steps: (1) preparing a ferrotitanium compound; (2) preparing composite material microspheres; step (1) comprises the steps of taking titanium isopropylate and ferrous sulfate heptahydrate as raw materials; adding the titanium isopropylate into an organic solvent, and stirring until a uniform state is formed; then adding the ferrous sulfate heptahydrate; adding a solution obtained by uniformly dissolving into an acetone-water mixed solution; stirring until sediment is uniform and stable; standing; after washing the sediment, drying the sediment in vacuum until the weight is constant; adding the ferrotitanium compound prepared in step (1) into a chitosan acetic acid solution; after uniformly stirring, dropwise adding a mixed solution into a sodium hydroxide solution, and washing; freeze drying, thus obtaining chitosan-ferrotitanium compound composite microspheres. According to the method disclosed by the invention, prepared microsphere adsorption particles have the characteristics of easiness for separation, high adsorption capacity and capability of being repeatedly utilized, and can applied to water treatment engineering as a novel adsorbent.

Description

technical field [0001] The invention relates to a preparation method and application of a chitosan-iron-titanium compound composite microsphere adsorbent, belonging to the technical field of adsorbents. Background technique [0002] With the rapid and high development of modern industry, the environmental pollution problems are becoming more and more serious, and the pollution of water environment is becoming more and more prominent. Due to the massive discharge of waste water in modern industries such as traditional Chinese medicine, metallurgy, chemical industry, printing and dyeing, and machinery, the content of heavy metals in various water bodies is increasing day by day. After entering the environment, heavy metals accumulate for a long time, and then accumulate in organisms through the food chain, which will pose an extremely serious threat to organisms and human health. Therefore, the removal of heavy metals in water is of great significance to the protection of hum...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20
Inventor 孙治荣张珂王雪云
Owner BEIJING UNIV OF TECH
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