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Preparation method and application of eichhornia crassipes cellulose xanthate calcium salt

A technology of calcium xanthate and cellulose, which is applied in the field of resources and the environment, can solve the problems such as the lack of preparation technology of cellulose xanthate, and achieve the effects of high chemical modification efficiency, improved adsorption effect, and improved purity

Active Publication Date: 2014-08-13
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing studies only preliminarily screened the process conditions in the main synthesis steps of cellulose xanthate, and more research focused on the optimization of working conditions for the treatment of heavy metal wastewater. Lack of further optimization studies, and these processes have a significant impact on their ability to adsorb heavy metals
[0004] There is no report on the patented technology about the conversion of water hyacinth biomass materials into cellulose-based heavy metal adsorption materials

Method used

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  • Preparation method and application of eichhornia crassipes cellulose xanthate calcium salt
  • Preparation method and application of eichhornia crassipes cellulose xanthate calcium salt

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of water hyacinth cellulose xanthate calcium salt, the preparation steps are:

[0032] 1) Add 100 mL of 20% (w / v, weight-to-volume ratio, the same below) sodium hydroxide solution to every 5 g of water hyacinth stem and leaf straw powder sample, and stir for 60 minutes in a constant temperature (30°C) electromagnetic stirrer (the same below) , centrifuge, pour out the upper layer of black liquor, and the lower layer of solid is alkalized cellulose;

[0033] 2) transfer the alkalized cellulose into a conical flask, wash with distilled water until the pH value is stable, centrifuge, and discard the liquid phase;

[0034] 3) Add 100mL of 10% sodium hydroxide solution to the solid in step 2), and wash the cellulose on the bottle wall into the bottle with 8-15ml of distilled water, stir for 30min, then slowly add 0.2mL of CS 2 , 30°C, stirred for 90 minutes;

[0035] 4) The material obtained in step 3) is subjected to solid-liquid separation, and the l...

Embodiment 2

[0041] Embodiment 2: the application of a kind of water hyacinth cellulose xanthate calcium salt in heavy metal wastewater treatment, its application process is:

[0042]Get the water hyacinth cellulose xanthate calcium salt adsorbent 0.10g that makes in embodiment 1, add the Cd of 50mL1000mg / L 2+ The solution was shaken in a constant temperature shaker at 25°C for 30min, and the shaker speed was 150rpm. After the adsorption was completed, it was filtered, and the Cd in the solution after adsorption was determined by atomic absorption method. 2+ Concentration, according to Cd before and after adsorption 2+ The concentration calculated for the adsorbent material for Cd 2+ the amount of adsorption. The experimental results show that the adsorption capacity of the adsorbent prepared in Example 1 is 271.8±4.8 mg / g.

[0043] Under the same conditions as the above adsorption conditions (0.10g adsorbent, 50mL solution containing heavy metals, oscillating adsorption for 30min in a ...

Embodiment 3

[0047] Control group 1-5, compared with the technical scheme described in embodiment 1, do following processing respectively:

[0048] Contrast 1, its preparation steps are:

[0049] 1) Add 100mL of 20% (w / v, weight to volume ratio, the same below) sodium hydroxide solution to every 5g of water hyacinth stem and leaf straw powder sample; stir in a constant temperature (30°C) electromagnetic stirrer for 60min, centrifuge, pour The upper layer of black liquor is discharged, and the lower layer of solid is alkalized cellulose.

[0050] 2) Transfer the alkalized cellulose into the Erlenmeyer flask, then add 100mL of 10% (w / v) sodium hydroxide solution to the solid, and wash the cellulose on the bottle wall into the bottle with a small amount of distilled water, and stir for 30 minutes. Then slowly add 0.2mL CS 2 (carbon disulfide), 30°C, stirring for 90 minutes;

[0051] 3) The material obtained in step 2) is subjected to solid-liquid separation, and the liquid phase is discard...

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Abstract

The invention discloses a preparation method and application of eichhornia crassipes cellulose xanthate calcium salt. The method uses the straws of aquatic plant eichhornia crassipes, namely water hyacinth as a raw material to be converted into cellulose xanthate salt, and the cellulose xanthate salt utilized as an adsorbent can be used for efficiently adsorbing and removing heavy metal ions in water and also can be used in the fields of soil remediation, environmental protection, ecological construction and the like. The adsorbing capacity of the adsorbent prepared by the preparation method to heavy metal is superior to that of an adsorbent prepared by other plant straws under the same modification condition, and the special advantage of the eichhornia crassipes plant material is embodied. The invention provides a new plant biomass utilization way and provides an effective way for exerting the advantage of the eichhornia crassipes living plant repairing polluted water and relieving the secondary pollution of the eichhornia crassipes to water after water repair.

Description

technical field [0001] The invention belongs to the field of resources and environment, and specifically relates to a preparation method and application of calcium water hyacinth cellulose xanthate of water hyacinth, in which cellulose xanthate is prepared by transforming water hyacinth straw, an aquatic plant, into water hyacinth, and using This product is an adsorbent that can be used for efficient adsorption and removal of heavy metal ions in water, and can also be used in fields such as soil remediation, environmental protection and ecological construction. technical background [0002] In recent years, water hyacinth (Eichhornia crassipes, Water hyacinth) has rapidly multiplied in rivers and lakes in southern my country. Due to inadequate management, its flooding results include blocking the river, polluting water quality after corruption, hindering the growth of other aquatic plants, and affecting the water ecosystem. cause serious harm. At the same time, because water...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62
Inventor 周文兵刘雪琴朱端卫万小琼赵建伟华玉妹刘广龙
Owner HUAZHONG AGRI UNIV
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