Preparation of pyromellitic dianhydride modified banana peel adsorbent

A technology of pyromellitic dianhydride and banana peel, applied in the direction of adsorption of water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc., can solve the problem of poor selection effect, poor adsorption effect of banana peel, etc. problems, to achieve good desorption performance, good physical and chemical stability, fast adsorption effect

Inactive Publication Date: 2015-01-21
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As a biosorbent, banana peel also has many problems such as poor adsorption effect and poor selection effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Banana peel pretreatment: clean the banana peel, cut into small pieces, dry at 80±5°C, crush after drying, and sieve with a 10-mesh sieve to obtain pretreated banana peel;

[0025] (2) Alkalized banana peel: In the reactor, add NaOH: 9g, water: 74mL, pre-treated banana peel: 18g, stir evenly, boil for 1.5 h, cool, filter with suction, wash with deionized water until neutral, Dried to obtain alkalized banana peel;

[0026] (3) Preparation of pyromellitic dianhydride modified banana peel adsorbent: In the reactor, add N, N-dimethylformamide: 93mL, pyromellitic dianhydride: 3g, after completely dissolving, then add Add alkalized banana peel: 9g, reflux at 70±3°C for 4 hours, filter with suction, and use N, N-dimethylformamide, 0.1 mol L -1 NaOH solution, washed with deionized water until neutral, and dried in an oven to obtain pyromellitic dianhydride modified banana peel adsorbent.

Embodiment 2

[0028] (1) Banana peel pretreatment: clean the banana peel, cut into small pieces, dry at 80±5°C, crush after drying, and sieve with a 20-mesh sieve to obtain pretreated banana peel;

[0029] (2) Alkalized banana peel: In the reactor, add NaOH: 7g, water: 79mL, pre-treated banana peel: 14g, stir evenly, boil for 2 hours, cool, filter with suction, wash with deionized water until neutral, Dried to obtain alkalized banana peel;

[0030] (3) Preparation of pyromellitic dianhydride modified banana peel adsorbent: In the reactor, add N, N-dimethylformamide: 85mL, pyromellitic dianhydride: 5g, after completely dissolving, then add Add alkalized banana peel: 15g, reflux at 70±3°C for 5 hours, filter with suction, and use N, N-dimethylformamide, 0.1 mol L -1 NaOH solution, washed with deionized water until neutral, and dried in an oven to obtain pyromellitic dianhydride modified banana peel adsorbent.

Embodiment 3

[0032] (1) Banana peel pretreatment: clean the banana peel, cut into small pieces, dry at 80±5°C, crush after drying, and sieve with a 10-mesh sieve to obtain pretreated banana peel;

[0033] (2) Alkalized banana peel: In the reactor, add NaOH: 10g, water: 70mL, pretreatment banana peel: 20g, stir evenly, boil for 1 h, cool, filter with suction, wash with deionized water until neutral, Dried to obtain alkalized banana peel;

[0034] (3) Preparation of pyromellitic dianhydride modified banana peel adsorbent: In the reactor, add N, N-dimethylformamide: 97mL, pyromellitic dianhydride: 2g, after completely dissolving, then add Add alkalized banana peel: 6g, reflux at 70±3°C for 6 hours, filter with suction, and use N, N-dimethylformamide, 0.1 mol L -1 NaOH solution, washed with deionized water until neutral, and dried in an oven to obtain pyromellitic dianhydride modified banana peel adsorbent.

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Abstract

The invention discloses a preparation method and an application of a pyromellitic dianhydride modified banana peel adsorbent, and is characterized in that the preparation method comprises the steps: washing cleanly banana peels, drying, then smashing, and thus obtaining preprocessed banana peels; then, according to the mass percentage concentration, adding 78-92% of N,N-dimethylformamide and 1.0-5% of pyromellitic dianhydride into a reactor, completely dissolving, and then adding 5-18% of the alkalized banana peels, wherein the sum of the percentages of the components is 100%; and at the constant temperature of 70+ / -3 DEG C, carrying out a reflux reaction for 3-6 h, carrying out suction filtration, washing to be neutral, drying, and thus obtaining the pyromellitic dianhydride modified banana peel adsorbent. The adsorbent can directly adsorb lead ions in a water body, is high in adsorption efficiency, has good physicochemical and mechanical stability, can be used in a relatively wide pH range, and can be renewable and be used repeatedly; the banana peels are natural biomacromolecules, are biodegradable, belong to agricultural waste reuse, and is easy to obtain and cheap; and the adsorbent is a natural green adsorbent.

Description

technical field [0001] The invention relates to a preparation method and application technology of a biosorbent, in particular to a preparation method of a pyromellitic dianhydride-modified banana peel adsorbent and its application for the adsorption of lead ions. Background technique [0002] With the rapid development of social economy and the rapid development of industry, the content of heavy metal ions discharged into our surrounding environment is also increasing, and the pollution of the surrounding environment is becoming more and more serious. Lead is one of the most toxic heavy metals. It is mainly It enters the matrix from the respiratory tract and digestive tract, causing great harm to human survival and biodiversity, not only destroying the environment but also posing a potential threat to people's lives and health. Different from organic pollutants, these heavy metal-containing substances not only cannot be decomposed by microorganisms in the environment a...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
CPCB01J20/24B01J20/305B01J2220/4875C02F1/286C02F1/62C02F2101/20
Inventor 许崇娟李慧芝戚玉华
Owner UNIV OF JINAN
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