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Method of preparing water treatment material anionic dye sorbent

An anionic dye and adsorbent technology, which is applied in the direction of adsorption of water/sewage treatment, chemical instruments and methods, and other chemical processes, and can solve problems such as poor adsorption effect, poor adsorption performance, and increased interlayer spacing.

Active Publication Date: 2008-07-30
溧阳常大技术转移中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bentonite itself has poor adsorption performance on organic pollutants, but after traditional organic modification, the size of the two-dimensional nanostructure of bentonite is significantly changed, and the interlayer distance is increased.
It has strong adsorption performance of organic pollutants, but it is limited to the adsorption of hydrophobic organic pollutants such as polycyclic aromatic hydrocarbons, etc.
Traditional organobentonite has poor adsorption effect on hydrophilic pollutants (such as phenol, etc.), but basically has no adsorption effect on ionic organic matter.

Method used

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  • Method of preparing water treatment material anionic dye sorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Add the pulverized 80-mesh calcium-based bentonite into the solution in which the cationic surfactant cetyltrimethylammonium bromide is dissolved, the amount of the surfactant is 100% of the cation exchange capacity of bentonite, and stir for 2 hours; then add ten Tetraalkyltrimethylammonium bromide, the amount of which is also 100% of the cation exchange capacity of bentonite, was stirred for 2 hours; the precipitate was washed 3 times with distilled water, baked at 110°C for 3 hours, ground, and passed through a 60-mesh sieve.

[0013] The obtained product was used for wastewater treatment containing Dye Orange II, and the results showed that the removal rate of Dye Orange II was 98% when the concentration of wastewater was 80 mg / L and the weight ratio of adsorbent to wastewater was 1:1000.

Embodiment 2

[0015] Add the pulverized 150-mesh sodium bentonite into the solution in which the cationic surfactant octadecyltrimethylammonium bromide is dissolved, the amount of the surfactant is 100% of the cation exchange capacity of bentonite, and stir for 3 hours; then add ten Dialkyltrimethylammonium chloride and octaalkyltrimethylammonium chloride, the total amount of which is 100% bentonite cation exchange capacity, stirred for 3 hours; washed the precipitate with distilled water for 5 times, baked at 120°C for 4 hours, and ground , through a 100-mesh sieve.

[0016] The obtained product was used for the treatment of wastewater containing dye acid red, and the results showed that the removal rate of dye acid red was 95% when the concentration of wastewater was 80 mg / L and the weight ratio of adsorbent to wastewater was 1:500.

Embodiment 3

[0018] Add the pulverized 200-mesh calcium-based bentonite into the solution in which the cationic surfactant octadecyltrimethylammonium chloride is dissolved, the amount of the surfactant is 100% of the cation exchange capacity of bentonite, and stir for 2.5 hours; then add Dodecylpyridinium chloride and cetyltrimethylammonium bromide, the total amount of which is 100% bentonite cation exchange capacity, was stirred for 3 hours; the precipitate was washed with distilled water for 4 times, baked at 115°C for 3.5 hours, and ground. Pass 80 mesh sieves.

[0019] The obtained product was used for wastewater treatment containing Dye Orange II, and the results showed that the removal rate of Dye Orange II was 97% when the wastewater concentration was 50 mg / L and the weight ratio of adsorbent to wastewater was 1:500.

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Abstract

The invention discloses a preparation method of a water treatment material anionic dye adsorbent in textile industry, comprising the following steps in sequence: (1) the crushed bentonite of 80-200 meshes is added into a solution dissolved with a cationic surfactant to be stirred for 2-3h and the amount of the surfactant is 100 percent of cation exchange capacity of the bentonite; (2) one or more kinds of cationic surfactants are added to be stirred for 2-3h and the total amount of the surfactants is 100 percent of cation exchange capacity of the bentonite; (3) precipitant is cleaned by the distilled water for 3-5 times, dried for 3-4 hours at the temperature of 110-120 DEG C, ground and sieved by a screen of 60-100 meshes. The adsorption capacity reaches 240mg / g at least which is more than that of normal sorbents.

Description

technical field [0001] The invention relates to a preparation method of an adsorbent used in the textile industry to treat dye wastewater by an adsorption method, in particular to a preparation method of an anionic dye adsorbent for water treatment materials. Background technique [0002] The textile printing and dyeing industry is a large discharge of industrial wastewater. According to incomplete statistics, the national discharge of printing and dyeing wastewater is 3-4 million tons per day. Wastewater contains a variety of dyes. Acid dyes and reactive dyes are the two main parts of dyes. From their molecular structure, these two types are both anionic dyes. Therefore, whether anionic dyes can be effectively removed is the key to the treatment of printing and dyeing wastewater. Commonly used printing and dyeing / dye wastewater treatment methods in industry include adsorption method, flocculation precipitation method, electrolysis method, oxidation method and biodegradatio...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/30C02F1/28
Inventor 马建锋李定龙黄文艳
Owner 溧阳常大技术转移中心有限公司
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