Manganese dioxide modified biochar composite material as well as a preparation method and an application thereof

A technology of manganese dioxide and composite materials, which is applied in the field of materials and the environment, can solve the problems of insufficient utilization of manganese elements, waste of raw materials, and difficulty in controlling the load of manganese oxides, etc., to achieve effective control, obvious adsorption effect, and increased stable effect

Active Publication Date: 2018-05-04
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] Composite materials prepared with manganese oxides as modified materials include manganese oxide-activated carbon materials, manganese oxide-resin, manganese oxide-nanomaterials and manganese oxide-biochar materials, but there are manganese oxide-biochar materials Among the materials, most of the composite materials are obt

Method used

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  • Manganese dioxide modified biochar composite material as well as a preparation method and an application thereof
  • Manganese dioxide modified biochar composite material as well as a preparation method and an application thereof
  • Manganese dioxide modified biochar composite material as well as a preparation method and an application thereof

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Example Embodiment

[0054] Example 1:

[0055] A biochar composite material modified by manganese dioxide of the present invention includes manganese dioxide and biochar; the biochar composite material modified by manganese dioxide is achieved through the neutralization of manganese in potassium permanganate and manganese acetate tetrahydrate It is prepared by loading the generated manganese dioxide on the biochar.

[0056] A method for preparing the manganese dioxide-modified biochar composite material of the foregoing embodiment includes the following steps:

[0057] S1. Mix pig manure and camphor sawdust at a mass ratio of 4:1 and perform aerobic composting for 60 days to obtain a mixture. The mixture is washed several times with deionized water, dried at 80°C, ground, and passed through a 100 mesh sieve , Put it in a sealed bag and save it for later use.

[0058] S2. Place the mixture after passing the 100-mesh sieve in step S1 in a quartz boat, and then put the quartz boat in a tube furnace and cal...

Example Embodiment

[0069] Example 2:

[0070] An application of the manganese dioxide modified biochar composite material of the present invention in the treatment of heavy metal wastewater, wherein the manganese dioxide modified biochar composite material comes from Example 1, and the heavy metal wastewater is lead-containing heavy metal wastewater or cadmium-containing heavy metal wastewater .

[0071] The treatment of lead-containing heavy metal wastewater includes the following steps: weighing 13 parts of the manganese dioxide-modified biochar composite material in Example 1 in an Erlenmeyer flask with an added amount of 0.40g / L, and adding an ionic strength of 0.01mol / L , Lead-containing heavy metal wastewater with a pH value of 5.0±0.2, in which the initial concentration of lead in the lead-containing heavy metal wastewater is 0.5mg / L, 1.0mg / L, 5.0mg / L, 10.0mg / L, 20.0mg / L, 40.0 mg / L, 60.0mg / L, 80.0mg / L, 100.0mg / L, 120.0mg / L, 150.0mg / L, 180.0mg / L and 210.0mg / L. After mixing, the oscillating ad...

Example Embodiment

[0082] Example 3:

[0083] An application of the manganese dioxide modified biochar composite material of the present invention in the treatment of heavy metal wastewater. The manganese dioxide modified biochar composite material comes from Example 1. The heavy metal wastewater is lead-containing heavy metal wastewater or cadmium-containing heavy metal wastewater .

[0084] The treatment of lead-containing heavy metal wastewater includes the following steps: weighing 39 parts of the manganese dioxide-modified biochar composite material in Example 1 in 39 conical flasks at an added amount of 0.40 g / L, and dividing them into three groups. Add lead-containing heavy metal wastewater with an ionic strength of 0.01 mol / L and a pH of 5.0±0.2 to each group of conical flasks. The initial concentration of lead in the lead-containing heavy metal wastewater is 0.5 mg / L, 1.0 mg / L, and 5.0 mg, respectively. / L, 10.0mg / L, 20.0mg / L, 40.0mg / L, 60.0mg / L, 80.0mg / L, 100.0mg / L, 120.0mg / L, 150.0mg / L, 1...

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Abstract

The invention discloses a manganese dioxide modified biochar composite material as well as a preparation method and an application thereof. The composite material is prepared from manganese dioxide and biochar by loading generated manganese dioxide on biochar through the neutralization reaction of permanganate and manganese in divalent manganese salt. The manganese dioxide modified composite material has the advantages of high adsorption capacity for heavy metal lead or cadmium, obvious adsorption effect, low preparation cost and the like, and is an ideal heavy metal wastewater adsorbent; thepreparation method of the composite material has the advantages of simple process, cheap raw materials, sufficiently used raw materials, low production cost and the like. The manganese dioxide modified composite material can be used for treating heavy metal wastewater, and has the advantages of high adsorption capacity for heavy metals, high adsorption efficiency, low toxicity to organisms in theenvironment and the like, and can be produced and applied on a large scale.

Description

technical field [0001] The invention belongs to the field of materials and environment, and in particular relates to a biochar composite material modified by manganese dioxide and its preparation method and application. Background technique [0002] With the rapid development of modern industry and agriculture, heavy metals enter the water body through industrial pollution sources such as mining, metal processing and chemical production wastewater, the use of pesticides and fertilizers and domestic garbage and other sources of pollution, as well as natural sources such as geological erosion and weathering, which are harmful to public health. pose a serious threat to the ecological environment. What's more serious is that heavy metal pollution has the characteristics of concealment, long-term, irreversible and serious consequences. It can eventually enter the human body through the ecological food chain, causing physiological diseases and endangering human health. [0003] A...

Claims

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Application Information

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IPC IPC(8): B01J20/20C02F1/28B01J20/30C02F101/20
CPCB01J20/06B01J20/20C02F1/283C02F2101/20
Inventor 梁婕李雪梅于志刚曾光明刘俊锋罗渊杨兆雪钱莹莹方意龙
Owner HUNAN UNIV
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