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Preparation method of modified cellulose heavy metal adsorbent

A technology of cellulose and heavy metals, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of resource waste, environmental pollution, etc., and achieve convenient operation, strong adsorption capacity, The effect of cheap and easy-to-obtain raw materials

Inactive Publication Date: 2015-11-04
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The global annual output of cellulose exceeds 100 billion tons, but the cellulose currently used by humans accounts for less than 10% of the total cellulose on the earth, and the vast majority of cellulose resources are not utilized or fully utilized, such as various The incineration of plant stalks and wood, and the disposal of a large number of worn-out clothes not only pollute the environment, but also cause a huge waste of resources.

Method used

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  • Preparation method of modified cellulose heavy metal adsorbent
  • Preparation method of modified cellulose heavy metal adsorbent
  • Preparation method of modified cellulose heavy metal adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 10g of cotton fiber, put it in 500ml of 2% sodium hydroxide solution, boil it for 90min, take it out after cooling and squeeze it dry, then place it in 300ml of 18% sodium hydroxide solution, and let it stand at 18°C. Place and treat for 120 minutes, take it out for washing, and dry to obtain alkalized cotton fibers. Weigh 5 g of alkalized cotton fibers, place them in 150 ml of 2% sodium periodate solution, shake and react in the dark at 70°C for 60 minutes, take them out, wash them, and dry them to obtain selectively oxidized cotton fibers. Add 1g of oxidized cotton fiber to a three-necked flask filled with 30mL of distilled water, mechanically stir evenly, and heat up to 70°C; another 2.5ml of glutaraldehyde mixed with 20mL of distilled water is added dropwise to the solution where the oxidized cotton fiber is located, and the heat preservation reaction is 0.5 h. Then, 10 ml of polyamino hyperbranched polymer aqueous solution with a mass concentration of 10% wa...

Embodiment 2

[0032]Weigh 10g of cotton fiber, put it in 500ml of 2% sodium hydroxide solution, boil it for 90min, take it out after cooling and squeeze it dry, then place it in 300ml of 18% sodium hydroxide solution, and let it stand at 18°C. Place and treat for 120 minutes, take it out for washing, and dry to obtain alkalized cotton fibers. Weigh 5 g of alkalized cotton fibers, place them in 150 ml of 2% sodium periodate solution, shake and react in the dark at 70°C for 60 minutes, take them out, wash them, and dry them to obtain selectively oxidized cotton fibers. Add 1g of oxidized cotton fiber to a three-necked flask filled with 30mL of distilled water, mechanically stir evenly, and heat up to 70°C; another 2.5ml of glutaraldehyde mixed with 20mL of distilled water is added dropwise to the solution where the oxidized cotton fiber is located, and the heat preservation reaction is 0.5 h. Then, 4ml of tetraethylenepentamine solution was added dropwise, and reacted at 70° C. for 240 minut...

Embodiment 3

[0034] Weigh 10g of cotton fiber, put it in 500ml of 2% sodium hydroxide solution, boil it for 90min, take it out after cooling and squeeze it dry, then place it in 300ml of 18% sodium hydroxide solution, and let it stand at 18°C. Place and treat for 120 minutes, take it out for washing, and dry to obtain alkalized cotton fibers. Weigh 5 g of alkalized cotton fibers, place them in 150 ml of 2% sodium periodate solution, shake and react in the dark at 70°C for 60 minutes, take them out, wash them, and dry them to obtain selectively oxidized cotton fibers. Add 1g of oxidized cotton fiber to a three-necked flask filled with 30mL of distilled water, mechanically stir evenly, and heat up to 70°C; another 2.5ml of glutaraldehyde mixed with 20mL of distilled water is added dropwise to the solution where the oxidized cotton fiber is located, and the heat preservation reaction is 0.5 h. Then, 4ml of triethylenetetramine solution was added dropwise, and reacted at 70° C. for 240 minute...

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Abstract

The invention discloses a preparation method of a modified cellulose heavy metal adsorbent. The method includes the steps of: 1. preparation of alkalized cellulose; 2. preparation of oxidized cellulose; and 3. preparation of polyamino modified cellulose. The method specifically includes: firstly conducting alkali pretreatment on cellulose to obtain alkalized cellulose, then using sodium periodate as the oxidizing agent to carry out selective oxidation on the alkalized cellulose to obtain oxidized cellulose, then using glutaraldehyde as the cross-linking agent, and employing a polyamino compound to conduct amination modification on the oxidized cellulose, thus obtaining the modified cellulose heavy metal adsorbent. The method provided by the invention has the advantages of relatively mild preparation conditions, simple process, convenient operation, easy large scale, and good industrial popularization prospect. The product has strong heavy metal adsorption ability, and can be used for heavy metal ion wastewater, organic wastewater treatment and other fields.

Description

technical field [0001] The invention relates to a preparation method of a heavy metal adsorbent, in particular to a preparation method of a modified cellulose heavy metal adsorbent, and belongs to the field of material modification processing. Background technique [0002] With the continuous acceleration of China's industrialization, more and more industries are involved in heavy metal emissions, including mining, metal smelting, chemical industry, printing and dyeing, leather, pesticides, feed, etc. In addition, some polluting enterprises have illegal mining and excessive sewage discharge. Prominent, so heavy metal pollution incidents appear high incidence trend. Water pollution caused by unreasonable discharge of industrial wastewater has always been a serious environmental problem. Heavy metal ions are highly toxic at low concentrations and can accumulate in biological organisms, causing a series of disorders and diseases. Therefore, the separation and removal of heavy ...

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 臧传锋任煜张广宇张伟李素英张瑜
Owner NANTONG UNIVERSITY
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