LDH-based composite material based on nickel-containing sludge and preparation method of LDH-based composite material

A composite material and sludge technology, which is applied to nickel compounds, chemical instruments and methods, zinc compounds, etc., can solve the problems of difficult treatment of heavy metal sludge, and achieve the effects of simple and economical preparation method, no secondary pollution, and stable properties.

Pending Publication Date: 2021-07-30
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention provides an LDH-based composite material based on nickel-containing sludge, which uses nickel-containing sludge as a raw material and turns sludge into treasure, which not only solves the difficult problem of heavy metal sludge, but also provides a very Promising pollution control materials, its research and application have shown great potential in the field of environmental protection and practical industrial applications

Method used

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  • LDH-based composite material based on nickel-containing sludge and preparation method of LDH-based composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of an LDH-based composite material containing nickel sludge, comprising the steps of:

[0024] a) Dry sludge containing 13.78 wt% nickel at 120°C, grind and sieve to obtain powder with a particle size of less than 100 μm, and calcinate at 400°C for 4 hours to obtain pretreated sludge;

[0025] b) Add 0.178 g of magnesium nitrate, 4.251 g of pretreated sludge and 1.12 g of hexamethylenetetramine into 50 mL of deionized water in sequence, stir well, then add 0.204 g of alumina microspheres, mix well, and transfer to the reaction Hydrothermal treatment was carried out in the kettle, and static reaction was carried out at 180°C for 24 h. After the reaction, cool to room temperature, filter, wash with water and ethanol three times respectively, and dry at 70°C for 12 h to obtain the LDH-based composite material containing nickel sludge.

[0026] The prepared LDH-based composite material containing nickel sludge has a specific surface area of ​​216.96 m ...

Embodiment 2

[0029] A preparation method of an LDH-based composite material containing nickel sludge, comprising the steps of:

[0030] a) Dry sludge containing 15.63 wt% nickel at 150°C, grind and sieve to obtain a powder with a particle size of less than 100 μm, and calcinate at 500°C for 4 hours to obtain pretreated sludge;

[0031] b) Add 0.151 g of zinc nitrate, 4.506 g of pretreated sludge and 1.12 g of hexamethylenetetramine into 50 mL of deionized water in sequence, stir well, then add 0.204 g of alumina microspheres, mix well, and transfer to the reaction Carry out hydrothermal treatment in the kettle, static reaction 36 h under 160 ℃. After the reaction, it was cooled to room temperature, filtered, washed twice with water and ethanol, and dried at 90°C for 14 h to obtain the LDH-based composite material containing nickel sludge.

[0032] The prepared LDH-based composite material containing nickel sludge has a specific surface area of ​​217.35 m 2 / g, the total pore volume is 0....

Embodiment 3

[0034] A preparation method of an LDH-based composite material containing nickel sludge, comprising the steps of:

[0035] a) Dry the sludge containing 8.43 wt% nickel at 180°C, grind and sieve to obtain a powder with a particle size of less than 100 μm, and calcinate at 800°C for 5 hours to obtain pretreated sludge;

[0036] b) Add 0.644 g of zinc sulfate, 22.548 g of pretreated sludge and 1.44 g of urea into 50 mL of deionized water in sequence, stir well, then add 0.419 g of flower-shaped alumina, mix well, transfer to the reactor for hydrothermal treatment , react statically at 220°C for 24 h, filter, wash with water and ethanol four times, and dry at 70°C for 16 h to obtain the LDH-based composite material containing nickel sludge.

[0037] The prepared LDH-based composite material containing nickel sludge has a specific surface area of ​​203.87 m 2 / g, the total pore volume is 0.39 cm 3 / g.

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Abstract

The invention belongs to the technical field of composite materials, and relates to an LDH-based composite material, in particular to an LDH-based composite material based on nickel-containing sludge. The LDH-based composite material comprises sludge and LDH nanosheets, wherein the size of the LDH nanosheets is 400-800 nm, the mass percentage content of the LDH nanosheets is not less than 10%, and the LDH nanosheets are one or any combination of more of Ni-Al LDH, Mg-Al LDH and Zn-Al LDH and are uniformly mixed with the sludge. The invention also discloses a preparation method of the material. The functional material is prepared from the solid waste sludge containing the heavy metal, the sludge is turned into wealth, the problem that the heavy metal sludge is difficult to treat is solved, and the material is stable in property, large in specific surface area and capable of being used in the fields of catalysis, adsorption and chemical separation; and the preparation method is simple, economical, free of secondary pollution and suitable for industrial application.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to LDH-based composite materials, in particular to an LDH-based composite material based on nickel-containing sludge and a preparation method thereof. Background technique [0002] While electroplating has made great contributions to the fields of materials, energy and chemicals, it has also caused environmental pollution, such as heavy metal ions and heavy metal-containing sludge pollution. Nickel-containing sludge is one of the main types of heavy metal-containing sludge, which mainly comes from industrial production processes such as metal smelting, electroplating, leather and batteries, and wastewater discharge. Ni 2+ Heavy metal ions such as heavy metal ions can bioaccumulate in plants, animals and humans through the food chain, which will have a huge impact on human life and production and limit the sustainable development of social economy. [0003] The traditiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00C01G9/00C01F7/00
CPCC01G53/00C01G9/00C01F7/00C01P2004/04C01P2004/20C01P2006/12C01P2006/14
Inventor 张涛田琼邱凤仙赵奔程李张迪杨冬亚
Owner JIANGSU UNIV
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