A kind of preparation method of magnetic straw cellulose dye adsorbent

A straw cellulose and adsorbent technology, applied in the field of preparation of magnetic straw cellulose dye adsorbent, can solve the problems of difficult solid-liquid separation, secondary pollution, etc., achieve improved compatibility, short life cycle chain, huge social effect of benefit
CN107349909BActive Publication Date: 2019-09-20CHENGDU UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHENGDU UNIVERSITY OF TECHNOLOGY
Publication Date
2019-09-20
Patent Text Reader

Abstract

The invention relates to a preparation method of a magnetic straw cellulose dye adsorbent. Straw is pre-processed through sodium chlorite and sodium hydroxide and oxidizes through sodium periodate to obtain aldehyde group straw cellulose. An improved chemical co-precipitation method is used to prepare magnetic nano particles, surface modification is conducted on the magnetic nano particles through a silane coupling agent KH550 to obtain KH550 modified magnetic nano particles, and finally, the KH550 modified magnetic nano particles, polyethyleneimine and glutaraldehyde are subjected to a cross-linking reaction to prepare the magnetic straw cellulose dye adsorbent with a schiff base cross-linking structure and multiple adsorption groups; the saturation magnetization is 10-30 emu / g, remanent flux density and coercive field strength all approach to zero, the paramagnetism and the magnetic responsiveness are provided, for a dye aqueous solution with an initial concentration of 100-1000 mg / L, the dye adsorption capacity reaches 50-300 mg / g, adsorption equilibrium can be reached in 60-150 min, the dye adsorption capacity after 5-time recycling is more than 75% of the first adsorption capacity, and the method can be widely applied in dye adsorption and separation, pollution abatement of dye waste water and the like.
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Description

[0001] 1. Technical field

[0002] The invention relates to a method for preparing a magnetic straw cellulose dye adsorbent. The magnetic straw cellulose dye adsorbent prepared by the invention is suitable for the adsorption and separation of dyes, and can be widely used in dye adsorption, dye separation and purification, and dye environmental pollution control, etc. .

[0003] 2. Background technology

[0004] Dye wastewater mainly comes from dye and dye intermediate production industries and textile, leather, paper, rubber, plastic, cosmetics, pharmaceutical and food industries, with complex composition, large changes in water quantity and quality, high chroma, COD and BOD concentration It is one of the most difficult industrial wastewater to treat due to the characteristics of high concentration, high suspended solids, and many refractory biodegradable substances. In addition, dye wastewater not only has obvious chroma, which affects the senses, but also contains toxic and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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