Modified biomass adsorber as well as preparation method and application thereof

A biomass adsorbent and modified technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of high price, difficult to recycle, large amount of consumption, etc., and achieve low price and adsorption speed. The effect of fast and improving reactivity

Inactive Publication Date: 2016-12-14
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Predecessors used straw to prepare anionic adsorbents usually choose epichlorohydrin as a bridge, first carry out etherification and cross-linking with hydroxyl groups on straw cellulose, and then realize amination. It is carried out in the amide organic system, but pyridine and DFM are expensive as catalysts and organic solvents, and they are used in large quantities and difficult to recover

Method used

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  • Modified biomass adsorber as well as preparation method and application thereof
  • Modified biomass adsorber as well as preparation method and application thereof
  • Modified biomass adsorber as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042]Wash, soak and dry the raw material of corn stalks, and crush them for later use. Weigh 6g of crushed corn stalks (40-80 mesh) into a beaker, add 200mL of 10% NaOH aqueous solution, and carry out alkalization pretreatment at room temperature for 3 hours. . The pretreated straw was dehydrated by suction filtration, and transferred to a three-necked flask, 60 mL of epichlorohydrin was added, and the cross-linking reaction was carried out in a constant temperature water bath at 65° C. and mechanical stirring for 6 hours. After the cross-linking reaction, excess epichlorohydrin in the straw was removed by filtration, and 60 mL of 33% trimethylamine aqueous solution was added to react for 3 h under the conditions of constant temperature water bath at 80° C. and mechanical stirring. The solidified product obtained by the reaction was washed successively with 100 mL of ethanol aqueous solution with a volume ratio of 1:1, 0.1 mol / L NaOH aqueous solution, and 0.1 mol / L NaCl aqueo...

Embodiment 2

[0047] Wash, soak and dry the raw material of corn stalks, and crush them for later use. Weigh 10g of crushed corn stalks (40-100 mesh) into a beaker, add 300mL of 10% NaOH aqueous solution, and carry out alkaline pretreatment at room temperature for 2 hours. . The pretreated straw was dehydrated by suction filtration, and transferred to a three-necked flask, where 100 mL of epichlorohydrin was added, and the crosslinking reaction was carried out in a constant temperature water bath at 65° C. and mechanical stirring for 6 hours. After the cross-linking reaction, excess epichlorohydrin in the straw was removed by filtration, and 100 mL of 33% trimethylamine aqueous solution was added to react for 3 h under the conditions of constant temperature water bath at 80° C. and mechanical stirring. The solidified product obtained by the reaction was washed successively with 100 mL of ethanol aqueous solution with a volume ratio of 1:1, 0.1 mol / L NaOH aqueous solution, and 0.1 mol / L NaCl...

Embodiment 3

[0050] The rice straw raw material was cleaned, soaked, dried, and crushed for later use. Weighed 6 g of crushed rice straw (40-80 mesh) into a beaker, added 200 mL of 10% NaOH aqueous solution, and alkalized for 3 hours at room temperature. The pretreated straw was dehydrated by suction filtration, and transferred to a three-necked flask, 60 mL of epichlorohydrin was added, and the cross-linking reaction was carried out in a constant temperature water bath at 65° C. and mechanical stirring for 6 hours. After the cross-linking reaction, excess epichlorohydrin in the straw was removed by filtration, and 100 mL of 33% trimethylamine aqueous solution was added to react for 3 h under the conditions of constant temperature water bath at 85° C. and mechanical stirring. The solidified product obtained by the reaction was washed successively with 100 mL of ethanol aqueous solution with a volume ratio of 1:1, 0.1 mol / L NaOH aqueous solution, and 0.1 mol / L NaCl aqueous solution, and fina...

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Abstract

The invention belongs to the technical field of adsorption materials, and discloses a modified biomass adsorber as well as a preparation method and application thereof. The preparation method comprises the following steps: cleaning a straw raw material, soaking and then drying the straw raw material, and performing pulverization; then performing alkalization pretreatment to remove water, and performing crosslinking treatment by using epoxy chloropropane; removing excessive epoxy chloropropane from the crosslinked straw, and performing quaternarization with a trimethylamine aqueous solution; filtering out the trimethylamine aqueous solution, and cleaning and drying an obtained modified straw product so as to obtain the modified biomass adsorber. The preparation method disclosed by the invention is low in preparation cost and environment-friendly, can be used for removing NO3<-> and PO4<3-> from nutrition-enriched water, is high in adsorption efficiency, and is relatively good in adsorption effect at the pH of 3 to 9.

Description

technical field [0001] The invention belongs to the technical field of adsorption materials, and in particular relates to a modified biomass adsorbent and its preparation method and application. Background technique [0002] Straw is an important agricultural by-product, which contains rich and available chemical components, and can be used as fertilizer, feed and raw material for industrial and sideline production. As a large agricultural country, our country produces about 600-800 million tons of straw every year. However, most of the straw in our country is processed by field incineration, and the comprehensive utilization rate of straw is only about 30%, forming a resource utilization technology for industrial scale production There are very few projects, resulting in a large waste of resources, and it is easy to cause environmental pollution problems. Therefore, it is urgent to develop new straw resource utilization technologies. [0003] In recent years, scholars at h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28B01J20/30B01J20/22
CPCB01J20/22C02F1/286C02F2209/06C02F2209/18C02F2209/15
Inventor 卢桂宁隋欣恬党志易筱筠郭楚玲杨琛
Owner SOUTH CHINA UNIV OF TECH
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