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Preparation method and application of dye adsorbent

An adsorbent and dye technology, applied in the field of preparation of dye adsorbents, can solve the problems of toxic by-products or secondary metabolites, time-consuming biodegradation methods, cumbersome preparation process, etc., to avoid secondary pollution risks, The effect of avoiding secondary pollution problems and simple preparation process

Active Publication Date: 2013-02-06
无锡西玖环保科技有限公司
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Problems solved by technology

[0003] At present, in the treatment of dye wastewater, the chemical and physical treatment methods have the problems of high cost and prone to secondary pollution; the biodegradation method has the disadvantages of taking a long time and easily producing toxic by-products or secondary metabolites
The adsorption method has the advantage of quickly removing dyes from wastewater and is favored. However, most of the adsorbents currently used have undergone complicated improvements. The preparation process is cumbersome and the cost is high. A large amount of alkali is used in the process, which increases the risk of secondary pollution

Method used

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  • Preparation method and application of dye adsorbent
  • Preparation method and application of dye adsorbent

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Embodiment 1

[0038] Take mature cedar needles, dry them at 75°C for 48 hours, take them out, grind them and sieve them to get a powder with a particle size of about 300-800 μm, soak the obtained powder with absolute ethanol for about 1 hour to degrease, Remove organic pigment, filter and rinse the precipitate with phosphate buffer solution with a concentration of 10mM (pH=4.5) three times, take the precipitate and dry it at 75°C for 48 hours, use a mortar to slightly break the powder agglomerate until it is uniform. As an adsorbent for decolorization.

[0039] Wastewater (chromaticity is about 50000 times, pH=9) is taken from a printing and dyeing factory, precipitated and filtered as a decolorization solution, and the dye wastewater is decolorized by using the adsorbent provided by the invention. The prepared adsorbent is directly added to the waste water, so that the concentration of the adsorbent in the waste water is 1.5g / 100ml, and the decolorization is carried out at a room temperatu...

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Abstract

The invention provides a biological adsorbent with simplicity in preparation, high efficiency and lower cost to remove dyes in waste water. In the preparation, the needles of the cedar are dried and crushed, the ethanol is used for degreasing and removing the organic pigment, and the needles are flushed by phosphate buffer and then precipitated, dried and sieved to prepare the adsorbent for removing the dye. According to the invention, the preparation process of the biological adsorbent is simple. Compared with other traditional adsorbents, the dye adsorbent has a lower cost and higher adsorption efficiency. Moreover, the cedars are common street trees and garden viewing trees, so that the material drawing is convenient, the materials are sufficient, and the problems of high cost, long time and secondary pollution due to recycled use of the adsorbent can be solved.

Description

technical field [0001] The invention specifically relates to a preparation method and application of a dye adsorbent. Background technique [0002] Synthetic dyes are common water pollutants in industrial wastewater, such as azo, anthraquinone, triarylmethane and phthalocyanine dyes. Most of these dyes are toxic, mutagenic and carcinogenic. At present, physical or chemical methods are mostly used to treat dye wastewater, such as adsorption, ion exchange, coagulation and ozonation by membrane filtration. However, most of these methods have problems such as high cost and long time consumption, and have not been widely used. In addition, biodegradation is currently the most used method, but due to the resistance of synthetic dyes to microorganisms and their secreted enzymes, some synthetic dyes are difficult to biodegrade. Even if they can be degraded, it will take a long time, usually several days. time, and the by-products or secondary metabolites produced by the biodegradat...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F103/30
Inventor 林永慧何兴兵韩国民马陶武胡文勇田启建肖竹平
Owner 无锡西玖环保科技有限公司
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