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Aerogel type heavy metal adsorbent and preparing method thereof

An airgel and heavy metal technology, applied in the direction of alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc., to achieve the effect of good stability, convenient preparation, and large adsorption capacity

Active Publication Date: 2018-05-18
QUANGANG PETROCHEM RES INST OF FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption capacity and adsorption efficiency of the existing adsorption materials need to be further improved, and the development of new adsorption materials with large adsorption capacity and high adsorption efficiency has become an important research direction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of organic compounds containing chelating groups

[0034] Dissolve 10g of chelating agent in 100g of deionized water, add 5g of N-hydroxysuccinimide (NHS) and 10g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDS) , adjust the pH value to 5, and perform an activation reaction at 30°C to obtain an intermediate solution; add 10 g of dopamine to 100 g of the intermediate solution, adjust the pH value to 4, and stir and react at room temperature for 24 hours to obtain a reaction solution; in the reaction solution Adding diethyl ether generates a precipitate, which is collected by centrifugation and vacuum-dried to obtain an organic substance containing a chelating group;

[0035] (2) Preparation of gel-type heavy metal adsorbent

[0036] Mix 10g of airgel material with 200g of ethanol solvent and deionized water. After the infiltration is complete, adjust the pH to 7 to obtain an airgel solution; dissolve the organic matter containing chel...

Embodiment 2

[0042] (1) Preparation of organic compounds containing chelating groups

[0043] Dissolve 10g of chelating agent in 500g of deionized water, add 10g of N-hydroxysuccinimide (NHS) and 5g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDS) , adjust the pH value to 7, and perform an activation reaction at 30°C to obtain an intermediate solution; add 5 g of dopamine to 100 g of the intermediate solution, adjust the pH value to 8, and stir the reaction at room temperature for 40 hours to obtain a reaction solution; in the reaction solution Adding diethyl ether generates a precipitate, which is collected by centrifugation and vacuum-dried to obtain an organic substance containing a chelating group;

[0044] (2) Preparation of gel-type heavy metal adsorbent

[0045] Mix 10g of airgel material with 600g of methanol solvent and deionized water. After the infiltration is complete, adjust the pH to 10 to obtain an airgel solution; dissolve the organic matter containing ...

Embodiment 3

[0051] (1) Preparation of organic compounds containing chelating groups

[0052] Dissolve 10g of chelating agent in 2000g of deionized water, add 20g of N-hydroxysuccinimide (NHS) and 30g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDS) , adjust the pH value to 6, and perform an activation reaction at 30°C to obtain an intermediate solution; add 20 g of dopamine to 100 g of the intermediate solution, adjust the pH value to 4.5, and stir and react at room temperature for 10 hours to obtain a reaction solution; in the reaction solution Adding diethyl ether generates a precipitate, which is collected by centrifugation and vacuum-dried to obtain an organic substance containing a chelating group;

[0053] (2) Preparation of gel-type heavy metal adsorbent

[0054] Mix 10g of airgel material with 1000g of isopropanol solvent and deionized water. After the infiltration is complete, adjust the pH to 8 to obtain an airgel solution; dissolve organic compounds contain...

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Abstract

The invention discloses an aerogel type heavy metal adsorbent high in adsorbing capacity and high in adsorbing efficiency and a preparing method thereof. The aerogel type heavy metal adsorbent is prepared by being compounded by an aerogel material and organic matter containing chelation groups. The aerogel material and a chelating agent are combined, the large specific surface area and pore volumeof the aerogel material and the heavy metal combining effect of the chelating agent are utilized, and the adsorbent has the advantages of being high in adsorbing capacity and high in adsorbing efficiency; dopamine is used as a bridging material, aerogel and the chelating agent are combined together through a chemical bond, the stability is high, and the preparation is convenient.

Description

technical field [0001] The invention relates to a heavy metal adsorbent, in particular to a heavy metal adsorbent prepared by compounding an airgel material and an organic substance containing a chelating group and a preparation method thereof. Background technique [0002] Heavy metals in water mainly include As, Cu, Cr, Zn, Cd, Pb, and Hg, etc., which generally enter the water environment through mining, metal smelting, electroplating, chemical wastewater, and domestic sewage. Heavy metals are highly toxic, difficult to be metabolized in the environment, easy to be enriched by organisms, and have biomagnification effects, which may cause great harm to the human body through various channels. Therefore, how to effectively solve the problem of heavy metal pollution and control the potential health risks caused by heavy metals to the human body has become a hot spot of concern. Adsorption is a common method to remove heavy metals in water. At present, the adsorption material...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/22B01J20/28047C02F1/285C02F2101/20
Inventor 陈登龙刘云鸿彭新艳刘金玲刘志鹏
Owner QUANGANG PETROCHEM RES INST OF FUJIAN NORMAL UNIV
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