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Preparation method of dopamine modified sepiolite adsorbent

A sepiolite and dopamine technology is applied in chemical instruments and methods, inorganic chemistry, other chemical processes, etc., to achieve the effects of simple use method, improved adsorption capacity and wide application range

Inactive Publication Date: 2015-12-30
BEIJING XINYUAN ENVIRONMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, the use of dopamine to modify sepiolite is rarely reported at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Sepiolite acid treatment: Weigh 1.0g of sepiolite powder passed through a 200-mesh sieve into a 250mL beaker, add 100mL of 0.5mol L -1 Hydrochloric acid solution, continuously magnetically stirred for 12 hours, then transferred to a Buchner funnel, rinsed repeatedly with deionized water, suction filtered and collected the gel filter cake; the above gel filter cake was transferred to a jar, and placed in an oven at a constant temperature of 100°C. After continuing for 12 hours, take out the gel filter cake in the jar, and grind to obtain acid-activated sepiolite; dopamine-modified sepiolite: take 1 g of the above-mentioned acid-activated sepiolite and 40 mg of dopamine hydrochloride in 100 ml trihydroxy In the methylaminomethane buffer solution, the molar concentration of the trishydroxymethylaminomethane buffer solution is 15mmol / L, the pH is 6.5, and the magnetic stirring reaction is carried out at room temperature for 3h; separation and passivation of dopamine-modified...

Embodiment 2

[0031] Sepiolite acid treatment: Weigh 3.0g of sepiolite powder passed through a 200-mesh sieve into a 250mL beaker, add 100mL of 1.0mol L -1 Hydrochloric acid solution, continuously magnetically stirred for 12 hours, then transferred to a Buchner funnel, rinsed repeatedly with deionized water, suction filtered and collected the gel filter cake; the above gel filter cake was transferred to a jar, and placed in an oven at a constant temperature of 103°C. After continuing for 12 hours, take out the gel filter cake in the jar and grind to obtain acid-activated sepiolite; dopamine-modified sepiolite: take 1 g of the above-mentioned acid-activated sepiolite and 100 mg of dopamine hydrochloride in 100 ml trihydroxy In the methylaminomethane buffer solution, the molar concentration of the trishydroxymethylaminomethane buffer solution is 15mmol / L, the pH is 8.0, and the magnetic stirring reaction is carried out at room temperature for 24h; the sepiolite modified by deionized dopamine i...

Embodiment 3

[0033] Sepiolite acid treatment: Weigh 5.0g of sepiolite powder passed through a 200-mesh sieve into a 250mL beaker, add 100mL of 2.0mol·L-1 hydrochloric acid solution, continuously magnetically stir for 12 hours, transfer to a Buchner funnel, and repeatedly use deionized water Rinse, filter and collect the gel filter cake; transfer the above filter cake to a jar, place it in an oven at a constant temperature of 100-105°C for 12 hours, then take out the gel in the jar, grind it to obtain acid-activated seafoam stone; get activated sepiolite 1g and 200mg dopamine hydrochloride in 100ml tris buffer solution, the molar concentration of the tris buffer solution is 15mmol / L, pH is 9.5, at room temperature Magnetic stirring reaction for 48 hours, centrifuge at a speed of 3000rpm for 10 minutes, separate passivated dopamine-modified sepiolite, wash with deionized water and centrifuge again, and place the centrifuged sepiolite in a vacuum dryer for drying After 24 hours, the adsorbent...

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Abstract

The invention relates to a preparation method of a dopamine modified sepiolite adsorbent. The method comprises the steps that S1, sepiolite powder is weighed and put in a beaker, a hydrochloric acid solution is added, continuous magnetic stirring is conducted, and the mixture is transferred to a Buchner funnel, repeated washing is conducted through deionized water, suction filtration is conducted, and a gel filter cake is collected; S2, the gel filter cake is transferred into a wide-mouth bottle, the wide-mouth bottle is placed in a drying oven for 12 h, the gel filter cake in the wide-mouth bottle is taken out, and grinding is conducted on the gel filter cake to obtain acid-activated sepiolite; S3, the sepiolite which is activated through acid and dopamine hydrochloride is added in a trihydroxymethyl aminomethane buffer solution, and a magnetic stirring reaction is conducted at the room temperature; S4, the deionized water is used for water washing, centrifugation is conducted for multiple times through a centrifugal machine, drying is conducted in a vacuum drier for 24 h, and the dopamine modified sepiolite adsorbent is obtained. The preparation method of the dopamine modified sepiolite adsorbent has the advantages of being simple in technology, low in cost and high in efficiency.

Description

technical field [0001] The invention relates to a preparation method of a dopamine-modified sepiolite adsorbent. Background technique [0002] Since the reform and opening up, with the rapid development of my country's economy, soil heavy metal pollution has become increasingly serious, and pollution incidents have occurred frequently. How to control heavy metal pollution in soil has become a research hotspot, and the research and development of heavy metal high adsorption materials provides technical support for the treatment of heavy metal pollution in soil. [0003] After the soil is polluted by heavy metals, its fertility will degrade, the yield and quality of crops will decrease, and the water environment will also be affected to a certain extent. Heavy metals can also be enriched in humans and organisms through the food chain, posing a threat to human health and affecting the sustainable development of social economy. The chemical passivation remediation method is ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/30
Inventor 韩君徐愿坚吕学欠邢阳周建强赵明阳杨立鹏王献德陈卫文高涛
Owner BEIJING XINYUAN ENVIRONMENT CO LTD
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