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Composite material for treating heavy metal-organic pollution, and preparation method and application thereof

A composite material and heavy metal technology, applied in the field of environmental management, can solve the problem of not having continuous repair of the environment, and achieve the effect of efficient and stable repair, increased stability, and efficient passivation

Active Publication Date: 2019-07-16
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, heavy metals and organic pollutants often exist in the environment at the same time, which puts forward higher requirements for repair agents. Many existing reagents with the function of passivating heavy metals do not have the ability to continuously repair the environment

Method used

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  • Composite material for treating heavy metal-organic pollution, and preparation method and application thereof
  • Composite material for treating heavy metal-organic pollution, and preparation method and application thereof

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preparation example Construction

[0022] The embodiment of the present invention provides a kind of preparation method that is used for the composite material of treatment heavy metal-organic matter, please refer to figure 1 ,include:

[0023] S1. Preparation of silver phosphate-titanium dioxide composite material

[0024] Silver phosphate-titanium dioxide composites include silver phosphate and titanium dioxide. The inventors found that titanium dioxide can improve the photocatalytic activity and photocatalytic stability of silver phosphate, which may be due to the use of titanium dioxide on Ag 3 PO 4 Modification can enhance the separation and transport of photogenerated electron holes, make more active species on the surface of the catalyst material, increase the active sites on the catalyst surface, and thus improve the photocatalytic activity. Insoluble TiO 2 with Ag 3 PO 4 Compounding, reduces the Ag 3 PO 4 Solubility, thereby reducing the degree of photocorrosion, increasing the Ag 3 PO 4 stab...

Embodiment 1

[0048] The present embodiment provides a composite material for controlling heavy metal-organic matter, which comprises the following steps:

[0049] (1) Preparation of Ag 3 PO 4 @TiO 2

[0050] Disperse 1.595g (0.02mol) of titanium dioxide in 50ml of pure water, sonicate for 5min, then add 3.05766g of silver nitrate (0.018mol), stir magnetically for 10min, then add 2.28072g of sodium phosphate 50ml solution (0.006mol) dropwise, and continue stirring for 4h. After stirring completely, the prepared Ag 3 PO 4 @TiO 2 Centrifuge at 4000 rpm for 10 minutes. After centrifugation, wash with deionized water three times, and finally dry in a vacuum oven (50° C., 14 hours). Ag produced 3 PO 4 / TiO 2 The molar ratio is close to 3:10.

[0051] (2) Preparation of ACF-nZVI

[0052] 5.0 g of ferrous sulfate and 1 g of activated carbonyl carbon fibers were mixed in 150 mL of distilled water (pH adjusted to 4.0), and then shaken at 150 rpm and 20° C. for 30 hours. Transfer the abov...

Embodiment 2

[0057] The present embodiment provides a composite material for controlling heavy metal-organic matter, which comprises the following steps:

[0058] (1) Preparation of Ag 3 PO 4 @TiO 2

[0059] Disperse 1.595g (0.02mol) of titanium dioxide in 50ml of pure water, sonicate for 5min, then add 3.05766g of silver nitrate (0.018mol), stir magnetically for 10min, then add 2.28072g of sodium phosphate 50ml solution (0.006mol) drop by drop, and continue stirring for 8h. After stirring completely, the prepared Ag 3 PO 4 @TiO 2 Centrifuge at 4000 rpm for 10 minutes. After centrifugation, wash with deionized water three times, and finally dry in a vacuum oven (70° C., 10 hours). Ag produced 3 PO 4 / TiO 2 The molar ratio is close to 3:10.

[0060] (2) Preparation of ACF-nZVI

[0061] 5.0 g of ferrous sulfate and 1 g of activated carbonyl carbon fibers were mixed in 150 mL of distilled water (pH adjusted to 4.0), and then shaken at 150 rpm and 30° C. for 20 hours. Transfer the ...

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Abstract

The invention discloses a composite material for treating heavy metal-organic pollution, and a preparation method and application thereof, and relates to the technical field of environmental treatment. The composite material for treating heavy metal-organic pollution comprises a silver phosphate-titanium dioxide composite material and a zero-valent iron composite material, wherein the zero-valentiron composite material is formed by loading zero-valent iron on an adsorption substrate. The preparation method comprises the following steps: carrying out wrapping formation on the silver phosphate-titanium dioxide composite material and the zero-valent iron composite material in a form of layering the substrate. The composite material provided by the invention can be used for simultaneously andefficiently passivating heavy metals and degrading organic matters, can be continuously and stably repaired, and can be applied to a water body or soil remediation process.

Description

technical field [0001] The invention relates to the technical field of environmental treatment, and in particular to a composite material for treating heavy metal-organic pollution, its preparation method and application. Background technique [0002] Silver phosphate (Ag 3 PO 4 ) has the advantages of low toxicity, high photocatalytic activity and high quantum yield, and is an ideal catalytic material in the field of photocatalysis. Silver phosphate can effectively degrade organic pollutants in the environment, but the scope of use is affected by its own stability, solubility and degree of photocorrosion. How to make silver phosphate have high photocatalytic activity and high photocatalytic stability is the focus of research on silver phosphate photocatalysts. [0003] However, heavy metals and organic pollutants often exist in the environment at the same time, which puts forward higher requirements for repair agents. Many existing reagents with the function of passivati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J27/18B01J35/08B01J37/03C09K17/40C02F1/30C02F1/70C02F101/20C02F101/30
CPCB01J31/38B01J27/1817B01J37/036C09K17/40C02F1/30C02F1/705C02F2305/10C02F2101/22C02F2101/20C02F2101/327B01J35/51B01J35/39
Inventor 徐恒谭航王璨徐绯王颖乔苏瑜刘华康
Owner SICHUAN UNIV
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