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Preparation method of modified watermelon peel adsorbent

A technology of watermelon rind and adsorbent, applied in the field of preparation of modified watermelon rind adsorbent, to achieve the effects of easy availability of raw materials, low preparation cost, and great application value

Active Publication Date: 2017-01-04
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No papers or patents have reported directly using watermelon rind as an adsorbent for adsorption and removal of printing and dyeing wastewater

Method used

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  • Preparation method of modified watermelon peel adsorbent
  • Preparation method of modified watermelon peel adsorbent
  • Preparation method of modified watermelon peel adsorbent

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Effect test

Embodiment 1

[0028] The preparation method of modified watermelon rind adsorbent of the present invention comprises the steps:

[0029] Step 1, prepare watermelon rind powder: remove the red pulp part on the recovered watermelon rind, cut the watermelon rind that has removed the red pulp part into small pieces with an area of ​​5 square centimeters and place it in deionized water for 1 hour, and after cooling, The watermelon rind pieces are soaked in an ethanol solution with a volume fraction of 50% (v / v) for 5 hours, cleaned with deionized water after soaking, dried at 80° C., and then pulverized through an 80-mesh sieve to obtain watermelon rind powder; ethanol Able to sterilize and prevent pesticides and other substances from affecting materials;

[0030] Step 2, soak 6g of watermelon rind powder in 300mL of 8% phosphoric acid solution by mass for 10 hours; wash the soaked watermelon rind powder with deionized water until the pH of the effluent after cleaning is neutral; phosphoric acid...

Embodiment 2

[0035] The preparation method of modified watermelon rind adsorbent of the present invention comprises the steps:

[0036] Step 1, prepare watermelon rind powder: remove the red pulp part on the recovered watermelon rind, cut the watermelon rind that has removed the red pulp part into small pieces with an area of ​​5 square centimeters and place it in deionized water for 2 hours, and after cooling, The watermelon rind pieces were soaked in an ethanol solution with a volume fraction of 60% (v / v) for 3 hours, washed with deionized water after soaking, dried at 105° C., and then pulverized through an 80-mesh sieve to obtain watermelon rind powder;

[0037] Step 2, soak 6g of watermelon rind powder in 300mL of 5% phosphoric acid solution by mass for 12 hours; wash the soaked watermelon rind powder with deionized water until the pH of the effluent after cleaning is neutral;

[0038] Step 3, add 300mL of deionized water to 3g of washed watermelon rind powder, and add 8mL of sodium h...

Embodiment 3

[0042] The preparation method of modified watermelon rind adsorbent of the present invention comprises the steps:

[0043] Step 1, prepare watermelon rind powder: remove the red pulp part on the recovered watermelon rind, cut the watermelon rind that has removed the red pulp part into small pieces with an area of ​​5 square centimeters and place it in deionized water for 3 hours, and after cooling, Watermelon rind pieces were soaked in an ethanol solution with a volume fraction of 40% (v / v) for 4 hours, washed with deionized water after soaking, dried at 105° C., and then pulverized through an 80-mesh sieve to obtain watermelon rind powder;

[0044] Step 2, soak 6g of watermelon rind powder in 300mL of 10% phosphoric acid solution by mass for 15 hours; wash the soaked watermelon rind powder with deionized water until the pH of the effluent after cleaning is neutral;

[0045] Step 3, add 300mL of deionized water to 3g of washed watermelon rind powder, and add 5mL of sodium hydr...

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Abstract

The invention discloses a preparation method of a modified watermelon peel adsorbent. The preparation method includes the steps that watermelon peel powder is prepared first; the obtained watermelon peel powder is put into a phosphoric acid solution to be soaked for 10-15 h and then cleaned with deionized water till the pH of effluent after cleaning is neutral; deionized water and an alkali solution are added into the cleaned watermelon peel powder; octadecy trimethyl ammonium bromide is added into the alkalized watermelon peel powder, and water bath heating is carried out for 3-5 h at 50-70 DEG C; the product after the water bath heating reaction is cleaned till the pH of effluent after cleaning is neutral, then drying and smashing are carried out, and the modified watermelon peel adsorbent is obtained. The preparation method is simple in process and low in preparation cost, and raw materials are easy to obtain; the obtained adsorption material has the advantages of being large in specific surface area, good in chemical stability, good in adsorption effect and easy to regenerate; compared with an adsorbent of the same kind, the adsorption material obtained through the preparation method is better in adsorption effect, and the adsorption capacity of the adsorption material on orange yellow can reach 225 mg / g.

Description

technical field [0001] The invention relates to a preparation method of a modified watermelon rind adsorbent, belonging to the technical field of adsorbent material preparation. Background technique [0002] With the increasing discharge of various industrial wastewater, the damage to human health and ecological environment is also becoming more and more serious. Printing and dyeing wastewater is wastewater discharged from printing and dyeing factories that mainly process cotton, hemp, chemical fibers and their blended products. Its wastewater contains a large amount of organic matter, which will endanger the water environment if it is discharged into the water. The color of the wastewater is deep, which seriously affects the appearance of the water body. At present, the methods for treating dye wastewater include flocculation, air stripping, oxidation, membrane separation, electrolysis and adsorption. Among them, the adsorption method is the more effective method. Since ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
CPCB01J20/24C02F1/286C02F2101/308
Inventor 冯骞于阳阳刘晓辉钟天意忻亥笑闫玉涛薛朝霞方芳操家顺杨雯周仕华吴园园姚永连
Owner HOHAI UNIV
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