A kind of mg2al-ls-ldh composite material and its preparation method and application

A composite material and mixed solution technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problem of low adsorption performance, improve adsorption performance, improve adsorption effect, and improve selection sexual effect

Inactive Publication Date: 2016-07-06
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a Mg 2 Al-LS-LDH composite material and its preparation method

Method used

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  • A kind of mg2al-ls-ldh composite material and its preparation method and application
  • A kind of mg2al-ls-ldh composite material and its preparation method and application
  • A kind of mg2al-ls-ldh composite material and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] a kind of Mg 2 The preparation method of Al-LS-LDH composite material, the steps are as follows:

[0030] (1) Precursor Mg 2 Al-CO 3 -Synthesis of LDH: Precursor Mg 2 Al-CO 3 The preparation of -LDH is synthesized by hydrothermal uniform precipitation (urea hydrolysis), and the specific process is as follows: Weigh 12.82gMg(NO 3 ) 2 6H 2 O, 9.38gAl(NO 3 ) 3 9H 2 O, 7.36g urea is dubbed into 500ml mixed solution, shake well and set aside. The concentration of each ion in the mixed solution is: Mg 2+ : 0.1mol / L, Al 3+ : 0.05mol / L, Urea: 0.245mol / L. Measure 50ml of the mixed solution into a 100mL hydrothermal kettle and seal it. The reaction kettle was placed in an environment of 140° C., cooled to room temperature after 24 hours of reaction, and a white precipitate was obtained, which was washed with a large amount of water, suction filtered, and the sample was dried at room temperature in air;

[0031] (2) Mg 2 Al-NO 3 -Synthesis of LDH: Compound Mg 2 Al...

Embodiment 2

[0035] Mg in this example 2 The preparation method of Al-LS-LDH composite material is as follows:

[0036] (1) Add 0.35gMg 2 Al-NO 3 - LDH was added to 1000mL formamide solution to obtain a mixed solution, and the mixed solution was left to stand for 20 hours, and manually shaken 5 times to obtain a nanosheet colloid;

[0037] (2) Add 0.63g of sulfonated lignin to the nanosheet colloid obtained in step (1), then shake it manually to obtain a brown colloidal solution, let it stand for 45 hours, drop the brown colloidal solution into an 800mL drain In gas water, the obtained turbid liquid is centrifuged, washed with exhaust water, and dried in air at room temperature to obtain Mg 2 Al-LS-LDH composites.

Embodiment 3

[0039] Mg in this example 2 The preparation method of Al-LS-LDH composite material is as follows:

[0040] (1) Add 0.45gMg 2 Al-NO 3 - LDH was added to 1000mL formamide solution to obtain a mixed solution, the mixed solution was left to stand for 30 hours, and manually shaken 6 times to obtain a nanosheet colloid;

[0041] (2) Add 0.75g of sulfonated lignin to the nanosheet colloid obtained in step (1), then shake it manually to obtain a brown colloidal solution, let it stand for 50h, drop the brown colloidal solution into a 1000mL drain In gas water, the obtained turbid liquid is centrifuged, washed with exhaust water, and dried in air at room temperature to obtain Mg 2 Al-LS-LDH composites.

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Abstract

The invention discloses a Mg2Al-LS-LDH composite material. There are two arrangements of sulfonated lignin between layers of the Mg2Al-LS-LDH composite material, and the corresponding interlayer distances are: d 003 =0.88 nm or d 003 =9.08 nm, using Mg2Al-CO3-LDH as the precursor, Mg2Al-NO3-LDH was obtained through ion exchange, using the characteristics of swelling / stripping of Mg2Al-NO3-LDH in formamide, the long-chain polymer side The product sulfonated lignin is inserted between LDH layers to prepare a composite material that is insoluble in water and has adsorption properties for heavy metals. The invention adopts the industrial by-product sulfonated lignin and uses Mg2Al–LDH as the matrix to prepare the composite material which has good selectivity and adsorption effect on Pb2+ and Cu2+, and is expected to be applied to the treatment of industrial wastewater.

Description

technical field [0001] The invention relates to heavy metal adsorption materials, in particular to a novel composite material Mg 2 Synthesis method of Al-LS-LDH and its application in heavy metal treatment. Background technique [0002] Heavy metals widely exist in nature. Due to the increasing mining, smelting, processing and commercial manufacturing activities of heavy metals, many heavy metals such as mercury, zinc, cadmium, lead, silver, etc. enter the water body, causing serious environmental pollution. Because heavy metals are easy to absorb and difficult to discharge, heavy metals are easy to accumulate in animals, plants and human bodies, posing a great threat to human health and sustainable development. Heavy metal pollution has caused many problems, such as Minamata disease in Japan, which is caused by mercury pollution in water bodies; another example is Itaitai disease, which is caused by zinc and cadmium discharged from the zinc smelting industry and cadmium el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/20
CPCB01J20/24C02F1/286
Inventor 黄改玲蒋玲苏文杰绪连彩王培元张婕王东
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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