Attapulgite and aniline-o-aminophenol composite adsorbent and preparation method thereof

A technology of attapulgite and o-aminophenol, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of large dosage, incomplete adsorption, and poor pertinence, and achieve Effect of strengthening adsorption performance and improving adsorption performance

Inactive Publication Date: 2019-09-03
MINGGUANG FEIZHOU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The unmodified attapulgite adsorbent can adsorb a wide variety of pollutants, but the pertinence is not strong, and the adsorption capacity needs to be improved
The adsorption performance of attapulgite modified by acid modification, thermal modification, surfactant modification, silane coupling agent modification and polymer grafting can be significantly improved, but there are still problems with large dosage or adsorption Incomplete and other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This example provides a preparation method of attapulgite and aniline-o-aminophenol composite adsorbent 1, comprising the following preparation steps:

[0023] S1, pretreatment: grind attapulgite, then pass through a 200-mesh sieve to obtain attapulgite powder;

[0024] S2. Acidified attapulgite: add the attapulgite powder obtained in step S1 into ultrapure water, mix and stir for 30 minutes, then let it stand for 8 hours, suck out the supernatant, take out the middle layer of fine soil to obtain purified attapulgite, and purify attapulgite Add the soil to the hydrochloric acid solution with a concentration of 3.0 mol / L, ultrasonically vibrate for 30 minutes at room temperature, and then add it to a high-speed centrifuge for centrifugation, then pour out the upper suspension, and filter the suspension to obtain the attapulgite filter residue, and finally use ultra-pure washing the attapulgite filter residue with water to neutrality to obtain acidified attapulgite;

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Embodiment 2

[0029] This embodiment provides a preparation method of attapulgite and aniline-o-aminophenol composite adsorbent 2, comprising the following preparation steps:

[0030] S1, pretreatment: grind attapulgite, then pass through a 200-mesh sieve to obtain attapulgite powder;

[0031] S2. Acidified attapulgite: add the attapulgite powder obtained in step S1 into ultrapure water, mix and stir for 30 minutes, then let it stand for 8 hours, suck out the supernatant, take out the middle layer of fine soil to obtain purified attapulgite, and purify attapulgite Add the soil to the hydrochloric acid solution with a concentration of 3.0 mol / L, ultrasonically vibrate for 30 minutes at room temperature, and then add it to a high-speed centrifuge for centrifugation, then pour out the upper suspension, and filter the suspension to obtain the attapulgite filter residue, and finally use ultra-pure washing the attapulgite filter residue with water to neutrality to obtain acidified attapulgite;

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Embodiment 3

[0036] This example provides a preparation method of attapulgite and aniline-o-aminophenol composite adsorbent 3, comprising the following preparation steps:

[0037] S1, pretreatment: grind attapulgite, then pass through a 200-mesh sieve to obtain attapulgite powder;

[0038] S2. Acidified attapulgite: add the attapulgite powder obtained in step S1 into ultrapure water, mix and stir for 30 minutes, then let it stand for 8 hours, suck out the supernatant, take out the middle layer of fine soil to obtain purified attapulgite, and purify attapulgite Add the soil to the hydrochloric acid solution with a concentration of 3.0 mol / L, ultrasonically vibrate for 30 minutes at room temperature, and then add it to a high-speed centrifuge for centrifugation, then pour out the upper suspension, and filter the suspension to obtain the attapulgite filter residue, and finally use ultra-pure washing the attapulgite filter residue with water to neutrality to obtain acidified attapulgite;

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Abstract

The invention belongs to the technical field of adsorption materials, and particularly relates to an attapulgite and aniline-o-aminophenol composite adsorbent and a preparation method thereof. The preparation method comprises: S1, pretreatment: grinding attapulgite to obtain powder; S2, acidification: adding the powder to ultrapure water, stirring, standing, sucking the supernatant, taking the middle layer refined soil to obtain purified attapulgite, adding the purified attapulgite to a hydrochloric acid solution, vibrating, carrying out centrifugation, carrying out suction filtration on the suspension to obtain filter residue, and washing to achieve a neutral state so as to obtain acidified attapulgite; S3, modification: dissolving a coupling agent in an ethanol aqueous solution, dispersing, hydrolyzing, adding the acidified attapulgite, carrying out stirring filtering, washing, and drying to obtain modified attapulgite; and S4, in-situ polymerization: dissolving aniline and hydrochloric acid in ultrapure water, adding o-aminophenol and the modified attapulgite slurry, uniformly mixing, adding ammonium persulfate, carrying out suction filtration after completing the reaction, washing the obtained filter residue until the filtrate is colorless, drying the filter residue, and grinding. According to the present invention, the adsorbent can effectively adsorb Cr(VI) in wastewater.

Description

technical field [0001] The invention belongs to the technical field of adsorption materials, and in particular relates to an attapulgite and aniline-o-aminophenol composite adsorbent and a preparation method thereof. Background technique [0002] Chromium-containing wastewater mainly comes from wastewater discharged from industries such as metal processing, electroplating, tanning and paint. The toxicity of chromium is related to its valence state. It is generally considered that metal chromium is non-toxic, and Cr(Ⅲ) is less toxic, while Cr(Ⅵ) is 100 times more toxic than Cr(Ⅲ). It is highly carcinogenic and carcinogenic to organisms. mutational properties. Therefore, it is necessary to effectively control and treat chromium-containing wastewater. At present, the commonly used chromium-containing wastewater treatment methods include chemical precipitation, electrolysis, reverse osmosis, ion exchange, membrane separation, adsorption and biological methods, etc. Among them,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/22
CPCB01J20/12B01J20/22B01J2220/46B01J2220/4806B01J2220/4812C02F1/281C02F1/285C02F2101/22
Inventor 胡睿顾文宇
Owner MINGGUANG FEIZHOU NEW MATERIAL
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