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Preparation method and application of magnetic iron oxide/mulberry stem biochar composite material

A technology of magnetic iron oxide and composite materials, applied in alkali metal oxides/hydroxides, chemical instruments and methods, alkali metal compounds, etc., can solve problems such as limited application, poor adsorption performance, and difficult separation process, and achieve good Fixed effect, low cost, simple process equipment

Inactive Publication Date: 2020-09-18
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to their poor adsorption performance and difficult separation process, their application is limited.

Method used

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  • Preparation method and application of magnetic iron oxide/mulberry stem biochar composite material
  • Preparation method and application of magnetic iron oxide/mulberry stem biochar composite material
  • Preparation method and application of magnetic iron oxide/mulberry stem biochar composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0024] (1) After peeling the bark of the mulberry tree, pulverize it into a powder with a universal grinder, pass through a 20-mesh sieve, and place it in an oven to dry at 75°C for later use.

[0025] (2) Place the powdered mulberry rods obtained in step (1) in a crucible, put the crucible containing the mulberry rods into a muffle furnace, heat up to 400°C at a heating rate of 5min / °C, and keep it for 2 hours to obtain Mulberry stem biochar, ground, passed through a 100-mesh sieve, and sealed for storage.

[0026] (3) Add 250 mL of ammonium ferrous sulfate solution with a concentration of 0.2 mol / L and 250 mL of ferric chloride solution with a concentration of 0.4 mol / L into a 1000 mL beaker, and stir evenly under 240 rpm.

[0027] (4) Add 20 mL of 1% soluble starch solution by volume to the mixed iron solution obtained in step (3), heat to 65° C. in a constant temperature water bath and continue magnetic stirring at 240 rpm.

[0028] (5) under 240rpm magnetic stirring, to ...

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Abstract

The invention discloses a preparation method and application of a magnetic iron oxide / mulberry stem biochar composite material. The preparation method comprises the following steps: grinding and carbonizing mulberry stems to obtain mulberry stem biochar; adding soluble starch into a mixed solution containing Fe<2+> and Fe<3+>, adding ammonia water while stirring, and then adding the mulberry stembiochar; and performing filtering, washing and freeze-drying to obtain the magnetic iron oxide / mulberry stem biochar composite material. The method is simple in process equipment, low in cost and easyto operate, the maximum adsorption capacity of the obtained magnetic iron oxide / mulberry stem biochar composite material to arsenic is 35.92 mg / g, and the magnetic iron oxide / mulberry stem biochar composite material can be used for repairing arsenic pollution in water and soil.

Description

technical field [0001] The present invention relates to a preparation method and application of a magnetic iron oxide / mulberry bar biochar composite material. Using mulberry bar as the main material, the preparation method of the magnetic iron oxide / mulberry bar biochar composite material and its adsorption to arsenic are studied application. Background technique [0002] Arsenic is a toxic element found in nature. In recent years, due to the increasing arsenic pollution in soil and groundwater, it has posed a serious threat to human health and safety. When the content of arsenic in water exceeds the World Health Organization (WTO) drinking water standard of 10 μg / L, it is considered high-arsenic water. Arsenic pollution in water mainly refers to the enrichment of arsenic in water caused by human productive activities. It mainly includes the mining of mines, the burning of fossil fuels, the arbitrary discharge of arsenic-containing "three wastes", and the extensive use of...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28B09C1/00C02F101/20
CPCB01J20/20B01J20/28009B01J20/0229B01J20/3085C02F1/283B09C1/00B01J2220/4825C02F2101/20
Inventor 梁美娜丁艳梅芦琳李净溪张庆唐沈张立浩
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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