Modified hair keratin adsorbent and its preparation method and use

A technology of keratin and adsorbent, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as poor adsorption effect, achieve high removal rate, simple process, and wide source of raw materials Effect

Inactive Publication Date: 2017-08-22
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a modifi

Method used

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  • Modified hair keratin adsorbent and its preparation method and use
  • Modified hair keratin adsorbent and its preparation method and use
  • Modified hair keratin adsorbent and its preparation method and use

Examples

Experimental program
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Embodiment 1

[0044] A preparation method of a modified hair keratin adsorbent, which comprises the following steps:

[0045] (1) Preprocessing:

[0046] After washing the hair several times with hot soapy water, wash it with deionized water to remove surface dust, put it in a fume hood to dry, then cut it to about 5mm with scissors, take 2g and put it in a beaker, add 0.5M NaOH to make it It was submerged, stirred and reacted with a magnetic stirrer at room temperature for 2 hours, taken out and rinsed with distilled water until neutral, filtered and dried at 40°C for 3 hours for later use.

[0047] (2) Primary modification:

[0048] Take 0.1 g of pretreated hair keratin fibers and place them in a constant temperature combined reactor, add a formaldehyde solution with a mass fraction of 37%, add 6 mL of formaldehyde solution for every 0.1 g of hair keratin fibers; then modify at a constant temperature of 40°C for 40 minutes;

[0049] (3) Secondary modification:

[0050] Add the dimethyl...

Embodiment 2

[0052] Preparation method is identical with embodiment 1, difference is, the operation method of step (2) is:

[0053] Take 0.1 g of hair keratin fiber obtained in step (1) in a constant temperature combined reactor, add a formaldehyde solution with a mass fraction of 37%, add 4 mL of formaldehyde solution for every 0.1 gram of hair keratin; then stir at a constant temperature at 50 ° C Modified for 50min.

Embodiment 3

[0055] Preparation method is identical with embodiment 1, difference is, the operation method of step (2) is:

[0056] Take 0.1 g of hair keratin fiber obtained in step (1) in a constant temperature combined reactor, add a formaldehyde solution with a mass fraction of 37%, add 2 mL of formaldehyde solution for every 0.1 gram of hair keratin; then stir at a constant temperature at 50 ° C Modification 60min.

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Abstract

The invention discloses a preparation method of a modified hair keratin adsorbent. The preparation method comprises pretreating hair as a raw material through a NaOH aqueous solution and carrying out two-step modification and compounding on the treated hair respectively through formaldehyde and dimethylamine to obtain a quaternary ammonium salt-containing modified keratin adsorbent having appearance the same to the original hair. Compared with the prior art, the modified hair keratin cation adsorbent can be used in the field of printing and dyeing wastewater treatment. The preparation method has a high removal rate of an anionic dye in the printing and dyeing wastewater. A test result shows that the modified hair keratin adsorbent has an anthraquinone dye active brilliant blue KN-R adsorption capacity of 537.6 mg/g about more ten times that of nonmodified hair keratin fibers. The preparation method utilizes raw materials having a wide resource and has simple processes.

Description

technical field [0001] The invention belongs to the field of preparation of modified adsorbent materials, and in particular relates to a preparation method of a modified hair keratin adsorbent. Background technique [0002] In recent years, with the rapid development of industrialization and urbanization, the discharge of various domestic sewage and industrial wastewater has been increasing day by day, and the accompanying water environment pollution has become increasingly serious. Among them, dye wastewater accounts for a large proportion of industrial wastewater, and has the characteristics of deep color, poor biodegradability, high toxicity, and high pollution degree. Common treatment methods such as activated carbon adsorption, biodegradation, and chemical oxidation have the disadvantages of high price, low efficiency, and easy formation of toxic by-products. Using abundant and cheap biomass materials as adsorbents to treat printing and dyeing wastewater has the advant...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28
CPCB01J20/24B01J2220/4856C02F1/286C02F2101/308
Inventor 方芳孙良玉薛朝霞操家顺冯骞李超秦敏敏乔莉莉陈慧吴园园何敏
Owner HOHAI UNIV
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