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Preparation method and application of hydrogen peroxide-modified biochar containing transition metal

A transition metal, hydrogen peroxide technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, special compound water treatment, etc., can solve problems such as unreported, achieve cheap raw materials, expand The effect of resource utilization and applicability, and simple preparation process

Active Publication Date: 2021-03-12
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although there have been many reports on metal oxide-modified biochars, there have been no reports on the modification of biochars enriched with heavy metals to have decontamination capabilities.

Method used

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  • Preparation method and application of hydrogen peroxide-modified biochar containing transition metal
  • Preparation method and application of hydrogen peroxide-modified biochar containing transition metal
  • Preparation method and application of hydrogen peroxide-modified biochar containing transition metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Using biochar enriched with manganese (Mn, 11.3mg / g), copper biochar (Cu, 14.3mg / g), and iron biochar (Fe, 9.7mg / g) as raw materials, they were dried at 60°C for 24 hours to dehydrate , in a tube furnace at N 2 Under the atmosphere, the temperature is 300°C, pyrolysis for 1h, and transition metal biochar samples are obtained after passing through a 100-mesh sieve, which are marked as Mn-300°C biochar samples, Cu-300°C biochar samples, and Fe-300°C biochar samples.

Embodiment 2

[0037] Weigh 0.1g of the Mn-300°C biochar sample and place it in a 10ml small glass bottle, add H2 with an initial mass fraction of 28% dropwise at 60-75D / min 2 o 2 2mL, a large amount of white smoke with a burning smell will be generated during the dropping process. After the dropping is completed, cover with 2-4 air holes left on the cover. After the end, the manganese biochar material was subjected to suction filtration treatment, washed with distilled water for 3 times during the suction filtration, and the modified Mn biochar material filtered by suction was dried in a constant temperature drying oven at 60°C for 12 hours to obtain H 2 o 2 Modified Mn biochar, named MB-H2.

Embodiment 3

[0039] Weigh 0.1 g of the Mn-300 °C biochar sample and place it in a 10 ml small glass bottle, add H2 with an initial mass fraction of 30% dropwise at 60-75 D / min 2 o 2 5mL, a large amount of white smoke with a burning smell will be generated during the dropwise addition. After the dropwise addition is completed, cover with 2-4 air holes, and place in a constant temperature oscillation box at 25°C for 12-24h; After the end, the manganese biochar material was subjected to suction filtration treatment, washed with distilled water for 3 times during the suction filtration, and the modified Mn biochar material filtered by suction was dried in a constant temperature drying oven at 60°C for 12 hours to obtain H 2 o 2 Modified Mn biochar, named MB-H5.

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Abstract

The invention discloses a preparation method and application of H2O2-modified biochar containing transition metal. The method comprises the following steps: taking biochar enriched with transition metal as a raw material, and carrying out dehydration and thermal cracking to obtain a transition metal biochar sample; putting the transition metal biochar sample into a container, dropwise adding hydrogen peroxide (H2O2), conducting capping, leaving an air hole in the cap, and conducting oscillating in a constant-temperature oscillation box for 12-24 hours; and carrying out suction filtration, water washing and drying on the obtained sample to obtain the hydrogen peroxide-modified transition metal-containing biochar product. The biochar sample enriched with manganese, copper, iron and other transition metals has no catalytic performance, and the manganese, copper and iron modified biochar catalyst with visible light catalytic activity can be prepared by adopting H2O2 as a modifier, and is applied to removal of rhodamine B (RhB) and phenol (Phenol) in water.

Description

technical field [0001] For the soil or water polluted by manganese, copper, iron and other heavy metals, it is difficult to transform and reuse a large amount of biomass materials obtained through phytoremediation technology. This technology provides a simple hydrogen peroxide modification method. The above-mentioned biomass materials polluted by metals are converted into resources, so that they can be applied to the reduction and removal of toxic organic pollutants in water bodies. The technology belongs to the field of resource sustainable utilization and pollution control. Background technique [0002] With the rapid development of mining, ore smelting and industrialization, soil pollution is increasing day by day. Serious non-point source pollution of heavy metals is one of the important environmental problems facing human beings. Phytoremediation technology is a new type of soil pollution control technology that is green, economical and safe to control soil heavy metal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J23/72B01J23/745B01J23/889C02F1/72B09C1/08C02F101/30C02F101/34
CPCB01J23/34B01J23/72B01J23/745B01J23/8892C02F1/725C02F1/722B09C1/08C02F2305/10C02F2305/02C02F2101/308C02F2101/30C02F2101/345B01J35/39
Inventor 方艳芬嬴登宇黄应平胥焘牛慧斌
Owner CHINA THREE GORGES UNIV
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