Preparation method and applications of chitosan derivative absorbent

A technology for chitosan derivatives and adsorbents is applied in the field of preparation of chitosan derivative adsorbents, which can solve the problems of difficulty in repeated use, low dye adsorption capacity, etc., and achieves fast decolorization rate, strong decolorization ability, and ease of use. effect of regeneration

Inactive Publication Date: 2015-08-12
JIANGNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, studies have shown that most CTS graft polymerization products exhibit low dye adsorption capacity and are difficult to achieve reuse

Method used

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  • Preparation method and applications of chitosan derivative absorbent
  • Preparation method and applications of chitosan derivative absorbent
  • Preparation method and applications of chitosan derivative absorbent

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The present invention is divided into three steps:

[0016] (1) Preparation of VNA-CTS adsorbent;

[0017] (2) Application of VNA-CTS adsorbent in decolorization of dye liquor.

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Abstract

The invention discloses a preparation method and applications of a chitosan derivative absorbent. The VNA-CTS absorbent is prepared through the free radical graft polymerization between chitosan (CTS) and vinyl nonanoate (VNA) in a mixed system of acetic acid (2 vol%) and waterless ethanol according to a volume ratio of 19:1, and the reaction products are subjected to freeze-drying. The absorbent is light-yellow solid particles, the structure is stable, and thus the preservation and transportation become easier. The preparation method is simple, the energy consumption is low, and the pollution to the environment is little. The novel VNA-CTS absorbent can remove the color of wastewater strongly and rapidly, can be used in a pH range of 2 to 7, has a high slat tolerant performance, and can be regenerated easily.

Description

technical field [0001] The invention belongs to the field of solution polymerization, and in particular relates to a preparation method and application of a chitosan derivative adsorbent. technical background [0002] Adsorption is one of the most widely used decolorization methods for printing and dyeing wastewater. Compared with other decolorization methods, it has obvious advantages: simple process and operation, low investment cost, large processing capacity, high decolorization rate, no additional chemicals, low energy consumption, environmental protection, and the adsorbent is expected to be regenerated and reused ; The adsorption method is especially suitable for the removal of non-biodegradable dyes. In recent years, research on adsorption methods has focused on finding more suitable new and inexpensive adsorbents to reduce or eliminate the accumulation of dyes in the environment, making the treatment of printing and dyeing wastewater safer and more economical, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F103/30
Inventor 田秀枝蒋学闫德东王树根
Owner JIANGNAN UNIV
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