Method for preparing bifunctional modified cellulose adsorbing agent from peanut shells and application of method

A peanut shell and cellulose technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of difficult control of functional group ratio, long reaction cycle, application limitations, etc., and achieve stable properties and low cost. Effect of low cost and high adsorption capacity

Inactive Publication Date: 2013-09-04
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this method, highly toxic flammable liquid epichlorohydrin and highly viscous and carcinogenic N,N-dimethylformamide are used as reaction solvents, and the reaction cycle is long, the operation is cumbersome, and the proportion of functional groups is difficult to control. Therefore, its application is limited

Method used

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  • Method for preparing bifunctional modified cellulose adsorbing agent from peanut shells and application of method
  • Method for preparing bifunctional modified cellulose adsorbing agent from peanut shells and application of method
  • Method for preparing bifunctional modified cellulose adsorbing agent from peanut shells and application of method

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Embodiment 1

[0040] (1) Washing and removing impurities from waste peanut shells, crushing them after natural air drying, and passing through a 100-mesh sieve to obtain pretreated peanut shell powder;

[0041] (2) Weigh 12g of the pretreated peanut shell powder obtained in step (1), and immerse it in 100mL of a mixed solution of ethanol and acetic acid with a volume fraction of 50% for 2 hours, and filter with suction, and filter the residue with a small amount of % ethanol and acetic acid mixed solution, and then washed with water until neutral to remove the yellow pigment. After suction filtration, the samples were dried in a drying oven at 50°C. store for later use;

[0042] (3) Weigh 10 g of the de-yellow peanut shell powder obtained in step (2), disperse it in 100 mL of NaOH solution with a mass fraction of 4%, stir at about 55°C for 2 hours, and remove half of the peanut shell. Cellulose: After the reaction, centrifugal separation at 4000 rpm, the solid was rinsed with distilled wa...

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Abstract

The invention discloses a method for preparing a bifunctional modified cellulose adsorbing agent from peanut shells and application of the method. The method comprises the following preparation steps of: washing, drying and crushing waste peanut shells, which are taken as raw materials, and removing flavochrome, hemicellulose and xylogen from the crushed peanut shells so as to obtain peanut shell cellulose; and performing surface functional modification on the materials through substitution and amidation further so as to finally obtain the amino and carboxy bifunctional modified peanut shell cellulose adsorbing material. The product is powdery and light brownish yellow, and the particle size of the product is 1.5-2.5 microns. The bifunctional modified peanut shell cellulose adsorbing material has a good adsorption effect for excessive heavy metals such as copper, chrome and mercury, phosphate, methylthionine chloride dye, and the like in water. The adsorbing agent is simple in preparation method, low in cost, cheap, easily available, good in biological compatibility and environment-friendly, contains a great deal of functional chelation groups, can realize simultaneous adsorption and removal of negative ions and positive ions, and has the advantages of being recyclable and the like.

Description

technical field [0001] The invention relates to a method and application technology for preparing a dual-functional modified cellulose adsorbent by using peanut shell waste, specifically a preparation method for a peanut shell dual-functional modified cellulose adsorbent, and a peanut shell dual-functional modified cellulose adsorbent prepared by the invention. Modified cellulose is used as an adsorbent material to adsorb and remove excessive heavy metals such as copper, chromium, mercury, phosphate and methylene blue dye in water, so as to achieve harmless treatment and water resource protection. Background technique [0002] In recent years, with the decline of oil and coal reserves and the rapid growth of prices, the development of industrialization, the discharge of wastewater is increasing, and countries are paying more and more attention to environmental pollution. China is the largest producer of peanuts in the world, with an annual output of more than 14.5 million to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
Inventor 沈昊宇朱宏亮姚屠鹏王陆波戴火峰胡美琴
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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