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Environment-friendly magnetic charcoal sponge as well as preparation method and application thereof

An environmentally friendly, biochar technology, applied in the fields of botanical equipment and methods, chemicals for biological control, applications, etc., can solve the problem of high filtration cost of microporous membrane, low water sterilization efficiency, and residual chlorine in water. many problems, to achieve the effect of high sterilization efficiency, low cost, and little impact on water quality

Active Publication Date: 2022-05-03
SOUTHWEST JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, microwaves are affected by the strong microwave absorption of water, which leads to low sterilization efficiency of microwaves directly acting on water bodies.
[0004] There are more or less problems in the existing sterilization methods. Although physical methods such as ultraviolet light sterilization are effective, they are greatly affected by the turbidity of water. Using ultraviolet light to treat turbid and large water bodies is often less effective. Poor; high temperature sterilization can only be used to sterilize a small amount of water, which has great limitations; while microporous membrane filtration has the disadvantages of high cost and short service life
Chemical law may lead to secondary pollution, such as adding chemical reagents such as chlorine dioxide, which will easily lead to more residual chlorine in the water body

Method used

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  • Environment-friendly magnetic charcoal sponge as well as preparation method and application thereof
  • Environment-friendly magnetic charcoal sponge as well as preparation method and application thereof
  • Environment-friendly magnetic charcoal sponge as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The present embodiment provides a kind of preparation method of environmentally friendly magnetic biochar sponge, comprising the following steps:

[0031] (1) Preparation of magnetic biochar

[0032] Wash the corn stalks and dry them in a drying oven with constant weight at 105°C. The dried corn stalks are then pulverized with a pulverizer. Take 25g of crushed corn stalk powder, soak in 400ml of Fe 2+ FeSO with a concentration of 0.27mol / L 4 In the solution, stir magnetically for 0.5 h to make it evenly mixed. Put it into a muffle furnace after drying, and perform pyrolysis at a rate of 5°C / min for 3.2h at a pyrolysis temperature of 405°C. After pyrolysis, the remaining black powder was washed with ultrapure water to a neutral pH value, then dried and ground, and put into a sealed plastic bottle for later use.

[0033] (2) Preparation of magnetic biochar sponge

[0034] (2.1) Weigh an appropriate amount of chitosan powder and dissolve it in 2wt% acetic acid aqueou...

Embodiment 2

[0041] The present embodiment provides a kind of preparation method of environmentally friendly magnetic biochar sponge, comprising the following steps:

[0042] (1) Preparation of magnetic biochar

[0043] Wash the corn stalks and dry them in a constant weight drying oven at 100°C. The dried corn stalks are then pulverized with a pulverizer. Take 25g of crushed corn stalk powder, soak in 400ml of Fe 2+ Concentration of 0.25mol / L FeSO 4 In the solution, stir magnetically for 0.5 h to make it evenly mixed. Put it into a muffle furnace after drying, and perform pyrolysis at a rate of 5°C / min for 4 hours at a pyrolysis temperature of 405°C. After pyrolysis, the remaining black powder was washed with ultrapure water to a neutral pH value, then dried and ground, and put into a sealed plastic bottle for later use.

[0044] (2) Preparation of magnetic biochar sponge

[0045] (2.1) Weigh an appropriate amount of chitosan powder and dissolve it in 2wt% acetic acid aqueous solutio...

Embodiment 3

[0052] The present embodiment provides a kind of preparation method of environmentally friendly magnetic biochar sponge, comprising the following steps:

[0053] (1) Preparation of magnetic biochar

[0054] Wash the corn stalks and dry them in a drying oven with constant weight at 105°C. The dried corn stalks are then pulverized with a pulverizer. Take 25g of crushed corn stalk powder, soak in 400ml of Fe 2+ FeSO with a concentration of 0.27mol / L 4 In the solution, stir magnetically for 0.5 h to make it evenly mixed. Put it into a muffle furnace after drying, and perform pyrolysis at a rate of 5°C / min for 3 hours at a pyrolysis temperature of 400°C. After pyrolysis, the remaining black powder was washed with ultrapure water to a neutral pH value, then dried and ground, and put into a sealed plastic bottle for later use.

[0055] (2) Preparation of magnetic biochar sponge

[0056] (2.1) Weigh an appropriate amount of chitosan powder and dissolve it in 2wt% acetic acid aqu...

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Abstract

The invention discloses an environment-friendly magnetic biochar sponge and a preparation method and application thereof.The preparation method comprises the steps that agricultural waste is prepared into magnetic biochar in a pyrolysis mode, then the magnetic biochar is prepared into a sponge shape through chitosan, and the prepared environment-friendly magnetic biochar sponge is combined with microwaves for comprehensive sterilization; and the material has magnetism, is convenient to recycle and has no secondary environmental pollution problem, so that the material can be used for treating sewage of a sewage treatment plant and agricultural irrigation sewage.

Description

technical field [0001] The invention belongs to the technical field of environmental functional materials, and in particular relates to an environment-friendly magnetic biochar sponge and its preparation method and application. Background technique [0002] Sewage treatment plays a particularly important role in the daily life of residents, and the disinfection and sterilization link plays an important role in the whole process, which is directly related to the quality of residents' daily water use. Therefore, a reliable and low-cost water environment sterilization method is urgently needed. At present, traditional water sterilization methods are divided into two methods: physical method and chemical method: physical method mainly uses some physical means to achieve the purpose of killing bacteria in water, such as light sterilization (such as ultraviolet light), microporous membrane filtration, high temperature Sterilization, etc. The chemical method is to achieve the purp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/00A01P1/00C02F1/50C02F1/30C02F9/12
CPCA01N59/00C02F1/50C02F1/302C02F1/488C02F2303/04Y02W10/37
Inventor 王东梅袁凯邹献兵惠彬宇马楠范美坤龚正君
Owner SOUTHWEST JIAOTONG UNIV
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