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Method for preparing adsorbent by modifying pineapple peel residues

A pineapple peel residue and adsorbent technology, applied in chemical instruments and methods, and other chemical processes, can solve problems such as inconvenient use and regeneration, environmental pollution, waste of resources, etc., and achieve easy operation, cost reduction, and stable adsorption performance Effect

Inactive Publication Date: 2010-05-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount (about 30-40%) of pineapple waste is produced in pineapple processing, and these wastes will pollute the environment and waste resources after being discarded. Therefore, the recovery and reuse of pineapple waste has become an urgent problem to be solved
[0003] Traditional adsorbents, such as activated carbon, ion-exchange fibers, etc., are inconvenient to use and regenerate due to their granular or powdery form. Fiber-based adsorbents can overcome this shortcoming

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Washing the pineapple peel, beating in a beater, filtering, drying at 50°C for 7 hours, and pulverizing into 0.1-0.5mm pineapple peel powder for subsequent use;

[0033] (2) Add the pineapple skin residue powder with a concentration of 10% isopropanol aqueous solution and stir for 36 hours, the dosage ratio of pineapple peel residue powder and isopropanol aqueous solution is 1:10g / mL, filter, wash, and dry;

[0034] (3) adding 0.05 mol / L sodium hydroxide aqueous solution to alkalinize for 4 hours, the dosage ratio of pineapple skin dregs powder and sodium hydroxide aqueous solution is 1: 15mL, filter, wash, and dry for later use;

[0035] (4) The above-mentioned pretreated pineapple peel and succinic anhydride are put into the reactor with a reaction ratio of 1:3, and pyridine is added, and the ratio of the volume of pyridine to the mass of pineapple peel is 12:1 (mL pyridine / g pineapple peel) , and stirred for 30 hours at a reaction temperature of 20°C. After the ...

Embodiment 2

[0038] (1) Washing the pineapple peel, beating in a beater, filtering, drying at 60°C for 5 hours, and pulverizing into 0.1-0.5mm pineapple peel powder for subsequent use;

[0039] (2) The pineapple peel powder was added with a concentration of 20% isopropanol aqueous solution and stirred for 24 hours, the dosage ratio of pineapple peel powder and isopropanol aqueous solution was 1:20g / mL, filtered, washed, and dried;

[0040] (3) Add 0.2 mol / L sodium hydroxide aqueous solution to alkalize for 1 hour, the dosage ratio of pineapple skin dregs powder and sodium hydroxide aqueous solution is 1: 20g / mL, filter, wash, and dry for later use;

[0041] (4) The above-mentioned pretreated pineapple peel and succinic anhydride are put into the reactor with a reaction ratio of 1:3, and pyridine is added, and the ratio of the volume of pyridine to the mass of pineapple peel is 14:1 (mL pyridine / g pineapple peel) , the reaction was stirred for 24 hours at a reaction temperature of 30°C. Af...

Embodiment 3

[0044] (1) Wash the pineapple peel, beat in a beater, filter, dry in the sun, and pulverize into 0.1-0.5mm pineapple peel powder for subsequent use;

[0045](2) The pineapple peel powder was added with a concentration of 20% isopropanol aqueous solution and stirred for 24 hours, the dosage ratio of pineapple peel powder and isopropanol aqueous solution was 1:15g / mL, filtered, washed, and dried;

[0046] (3) adding a concentration of 0.1mol / L sodium hydroxide aqueous solution to alkalinize for 2 hours, the dosage ratio of pineapple skin dregs powder and sodium hydroxide aqueous solution is 1: 20g / mL, filter, wash, and dry for later use;

[0047] (4) The above-mentioned pretreated pineapple peel and succinic anhydride are put into the reactor with a reaction ratio of 1:4, and pyridine is added, and the ratio of the volume of pyridine to the mass of pineapple peel is 10:1 (mL pyridine / g pineapple peel) , and the reaction was stirred for 24 hours at a reaction temperature of 25°C....

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Abstract

The invention provides a method for preparing an adsorbent by modifying pineapple peel residues, which comprises the following steps of: washing, pulping, filtering and drying the pineapple peel residues, then treating the pineapple peel residues by isopropyl alcohol and then performing the alkalization treatment on the pineapple peel residues by sodium hydroxide; adding succinic anhydride, pyridine or dimethyl sulphoxide into the pineapple peel residues for a modification reaction; and after the reaction is finished, washing and drying the obtained product to obtain the adsorbent used for adsorbing heavy metal ions in wastewater. The method utilizes the pineapple peel residues generated in the pineapple processing to prepare the novel adsorbent, so that the adsorbent has the advantages of rich sources of raw materials, low cost, simple preparation and good absorption effect on metal ions; and the method not only realizes the utilization of wastes, changes wastes into valuables ,adds the value and creates the benefit, but also reduces the pollution to the environment caused by discarding the pineapple peel residues, and ensures that the prepared adsorbent can purify water resources so as to realize the sustainable development of ecological resources.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of agricultural products and natural polymer modification technology, in particular to the modification of pineapple pomace and the preparation method of a novel natural organic polymer adsorbent. Background technique [0002] Pineapple, also known as pineapple, scientific name Ananas Com osus (L). 90 countries and regions. It is planted in Fujian, Guangdong, Hainan, Guangxi, Yunnan and other places in China. A large amount (about 30-40%) of pineapple wastes are produced in pineapple processing, and these wastes will pollute the environment and waste resources after being discarded. Therefore, the recycling and reuse of pineapple wastes has become an urgent problem to be solved. [0003] Traditional adsorbents, such as activated carbon, ion-exchange fibers, etc., are inconvenient to use and regenerate due to their granular or powdery form. Fiber-based adsorbents can overcome th...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30B01J20/22
Inventor 黄惠华胡秀沂
Owner SOUTH CHINA UNIV OF TECH
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