Preparation method of bacterial cellulose LDH composite adsorption material

A technology of composite adsorption material and bacterial cellulose, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problem of single adsorption method of bacterial cellulose

Active Publication Date: 2020-12-11
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention intends to provide a preparation method of bacterial cellulose LDH composi

Method used

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  • Preparation method of bacterial cellulose LDH composite adsorption material
  • Preparation method of bacterial cellulose LDH composite adsorption material
  • Preparation method of bacterial cellulose LDH composite adsorption material

Examples

Experimental program
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Embodiment 1

[0034] Example 1: Add 5 g of bacterial cellulose powder (Hainan Yide Food Co., Ltd.) into 100 ml of deionized water, stir to disperse it, and obtain a bacterial cellulose dispersion. Add 2.5 g of aluminum nitrate and 5 g of magnesium nitrate to the bacterial cellulose dispersion and stir to dissolve the aluminum nitrate and magnesium nitrate to obtain a co-precipitation system. Mix 5ml of prepared 0.2mol / L sodium hydroxide solution with 10ml of 0.5mol / L sodium carbonate solution to obtain 15ml coprecipitant. Add the co-precipitation agent dropwise to the constantly stirring co-precipitation system, and then heat at 70°C for 8 hours. The obtained solid product (precipitation, that is, the adsorption matrix material) is filtered and washed to neutrality, and 100g of deionized water is added to obtain a mixed Suspension. After heating the mixed suspension to 80°C, add 0.1g of p-toluenesulfonic acid and 10g of polyacrylic acid (molecular weight: 2000-5000) and stir for 4 hours. A...

experiment example

[0048] (1) Preparation of Cu(II) standard curve

[0049] Weigh 1.0g of anhydrous copper sulfate standard sample with a balance, put the weighed solid into a 200ml beaker, add 100ml of ethanol solution dropwise, stir, and heat the beaker to 60°C to ensure that the solid sample is completely dissolved. Return to room temperature, transfer it to a 1000ml volumetric flask, and dilute to volume. Take the above prepared 1.0ml of Cu(II) standard solution with a concentration of 10 μg / ml, transfer it to a 50ml volumetric flask, add 4.0ml of ammonia solution (ammonia:water=1:1), 2.0ml of citric acid (0.5 g / ml); 10.0ml bicyclohexanone oxalthalin two brown solution (0.1%), constant volume. Take 1.2ml, 1.4ml, 1.6ml, 2.0ml standard solutions and prepare them according to the above method. Choose a 1ml cuvette at 610nm and use a blank sample as a reference solution. After preheating for 10 minutes, use a UV-spectrophotometer to measure the absorbance. The equation of Cu(II) standard work...

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Abstract

The invention relates to the technical field of sewage treatment, and in particular, relates to a preparation method of a bacterial cellulose LDH composite adsorption material, wherein the preparationmethod comprises a synthesis step and a combination step. In the synthesis step, an aluminum salt solution and a magnesium salt solution are dropwise added into a bacterial cellulose dispersion liquid, a coprecipitator is used for in-situ synthesis of layered double hydroxides on the surface of bacterial cellulose, and the mixture is made into a mixed solution. In the combination step, a catalystand a binding reagent are added into the mixed solution, and a product is obtained after a catalytic reaction. The bacterial cellulose/LDH composite adsorption material prepared by the preparation method has an electrostatic attraction effect, an ion exchange effect, a chelating effect, a physical adsorption effect and the like on heavy metal ions in a polluted water body, overcomes the defect ofa single bacterial cellulose adsorption mode, improves the adsorption effect, and can solve the technical problem that a layered double hydroxide material is unstable in an acidic water environment.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a preparation method of bacterial cellulose LDH composite adsorption material. Background technique [0002] Bacterial cellulose (BC) is a cellulose synthesized by artificial fermentation, and its molecular structure is consistent with that of plant cellulose. However, compared with plant cellulose, BC is a fiber network composed of superfine fibers with a fiber diameter of 0.01-0.1 μm. Each fiber is composed of microfibers, and its diameter and width are only 1%-0.1% of cotton fibers. Therefore, BC has excellent properties that plant cellulose does not have, such as high purity, high crystallinity, special ultrafine three-dimensional fiber network structure, non-toxic and harmless, etc. Because of its ultra-fine network structure, high specific surface area, and easy biodegradability, it has certain adsorption capacity for heavy metal ions. However, the single adsorpt...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/26C02F1/28C02F101/20B01J20/24
CPCB01J20/24B01J20/08B01J20/041B01J20/261B01J20/262C02F1/286C02F1/281C02F1/285C02F2101/20Y02W10/10
Inventor 王波林福华毛双丹李静博齐高相刘焱超韩晓静柴婕袁昆仑李泽鑫
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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