Biochar, iron and manganese spinel composite material for adsorbing heavy metal antimony and cadmium

A technology for adsorbing heavy metals and composite materials, which is applied in the field of biochar ferromanganese spinel composite materials, to achieve high-efficiency adsorption, good adsorption, and favorable adsorption effects

Active Publication Date: 2017-12-01
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, at present, the research on the adsorption of heavy metals in water by biochar is mostly limited to the analysis of the adsorption of one heavy metal.
However, the situation of heavy metal pollution in water bodies is complicated. Generally, there are multiple heavy metal pollution

Method used

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  • Biochar, iron and manganese spinel composite material for adsorbing heavy metal antimony and cadmium
  • Biochar, iron and manganese spinel composite material for adsorbing heavy metal antimony and cadmium
  • Biochar, iron and manganese spinel composite material for adsorbing heavy metal antimony and cadmium

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Effect test

Embodiment 1

[0039] A biochar ferromanganese spinel composite material for adsorbing heavy metal antimony and cadmium, which is dripped from solution B into suspension A at a constant speed, then stirred for 2.5 hours, and then centrifuged, washed and dried to obtain biochar iron Manganese spinel composite material, adjust the pH value of solution B and suspension A to 10 before dropping, the weight ratio of suspension A and solution B is 1:0.92; solution B is 0.1mol / L high manganese Suspension A consists of water, ferrous sulfate heptahydrate and tea branch biochar in a weight ratio of 100:8.0:0.8;

[0040] Tea branch biochar is prepared by the following method:

[0041] a) drying the tea leaves after cleaning;

[0042] b) Wash and dry the tea leaves first in an air atmosphere at 200°C for 20 minutes, then heat at 600°C without oxygen for 70 minutes, and cool to obtain a charred product;

[0043] c) drying the charred product at 70° C. for 12 hours, and grinding it to 50 mesh to prepare...

Embodiment 2

[0046] A biochar ferromanganese spinel composite material for adsorbing heavy metal antimony and cadmium, which is dripped from solution B into suspension A at a constant speed, then stirred for 3 hours, and then centrifuged, washed and dried to obtain biochar iron Manganese spinel composite material, adjust the pH value of solution B and suspension A to 10 before dropping, the weight ratio of suspension A and solution B is 1:0.929; solution B is 0.1mol / L high manganese Suspension A consists of water, ferrous sulfate heptahydrate and tea branch biochar in a weight ratio of 100:8.34:1;

[0047] Tea branch biochar is prepared by the following method:

[0048] a) drying the tea leaves after cleaning;

[0049] b) Wash and dry the tea leaves first in an air atmosphere at 250°C for 25 minutes, then heat at 500°C without oxygen for 90 minutes, and cool to obtain a charred product;

[0050] c) drying the charred product at 80° C. for 14 hours, and grinding it to 60 mesh to prepare t...

Embodiment 3

[0053] A biochar ferromanganese spinel composite material for adsorbing heavy metal antimony and cadmium, which is dripped from solution B into suspension A at a constant speed, then stirred for 3.5 hours, and then centrifuged, washed and dried to obtain biochar iron Manganese spinel composite material, adjust the pH value of solution B and suspension A to 10 before dropping, the weight ratio of suspension A and solution B is 1:0.94; solution B is 0.1mol / L high manganese Potassium acid potassium solution, suspension A is made up of water, ferrous sulfate heptahydrate and tea branch biochar by weight ratio 100:8.5:1.2;

[0054] Tea branch biochar is prepared by the following method:

[0055] a) drying the tea leaves after cleaning;

[0056] b) Wash and dry the tea leaves first in an air atmosphere at 300°C for 30 minutes, then heat at 700°C without oxygen for 110 minutes, and cool to obtain a charred product;

[0057] c) drying the charred product at 90° C. for 16 hours, and ...

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Abstract

The invention belongs to the technical field of adsorption materials, and discloses a biochar, iron and manganese spinel composite material for adsorbing heavy metal antimony and cadmium. Solution B is dripped into suspension A at the constant speed, the solution B and the suspension A are stirred for 2.5-3.5 hours and are centrifuged, washed and dried to obtain the biochar, iron and manganese spinel composite material. The solution B is potassium permanganate solution with the concentration of 0.1 mol/L, and the suspension A comprises water, ferrous sulfate heptahydrate and from tea leaf and branch biochar according to a weight ratio of 100:(8.0-8.5):(0.8-1.2). The biochar, iron and manganese spinel composite material has the advantages that the biochar, iron and manganese spinel composite material has a large specific surface area and is large in porosity and favorable for adsorbing the heavy metal; adsorption environments are mild, and the heavy metal can be efficiently adsorbed in neutral and slightly weakly acidic environments; excellent adsorbing and removing effects can be realized by the biochar, iron and manganese spinel composite material for single heavy metal environments, and excellent heavy metal adsorbing and removing effects also can be realized by the biochar, iron and manganese spinel composite material for heavy metal antimony and cadmium co-existence environments.

Description

technical field [0001] The invention belongs to the technical field of adsorption materials, and in particular relates to a biochar-iron-manganese spinel composite material used for adsorbing heavy metal antimony and cadmium. Background technique [0002] Antimony (Sb) occupies an important position in the world as a non-renewable resource, and it is widely used in flame retardants, wear-resistant alloys, ceramics, bullets, batteries and pigments. Due to the development and utilization of antimony, a large number of antimony-containing compounds have been released into the environment. Antimony is a potentially toxic and carcinogenic element. A large amount of antimony enters the surface environment, which not only causes heavy metal pollution in the surface environment, but also combines with sulfhydryl groups in the human body, interfering with enzyme activity and destroying the ion balance in cells. Hypoxia, which causes metabolic disorders in the body, and then leads to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01J20/28C02F1/28C02F101/20
CPCB01J20/0281B01J20/20B01J20/28057B01J20/28095B01J2220/4806B01J2220/4825C02F1/28C02F1/281C02F1/283C02F2101/20
Inventor 杨生茂汪玉瑛吕豪豪刘玉学何莉莉计海洋
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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