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Iron modified peanut shell magnetic biochar as well as preparation method and application thereof

A peanut shell and biochar technology, applied in chemical instruments and methods, water pollutants, alkali metal compounds, etc., can solve problems such as difficulty in separating adsorbents from polluted water bodies, and achieve resource utilization, low price, and good environment. The effect of benefit and social benefit

Inactive Publication Date: 2019-03-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the technical problem that it is difficult to separate the adsorbent carrying heavy metal pollutants from the polluted water body, and provides a kind of iron-modified peanut shell magnetic biochar and its preparation method and application, using ferric chloride solution to soak peanuts The method of shell biomass is used for magnetization, so that the obtained novel iron-modified peanut shell biochar has magnetism. The novel iron-modified peanut shell biochar prepared by the present invention has high removal efficiency and can realize magnetic separation and recovery regeneration , will not produce secondary pollution, the process is simple and feasible, the source of raw materials is wide, and the resource utilization of biomass has been realized, and it is suitable for the treatment of various heavy metal-containing wastewater

Method used

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  • Iron modified peanut shell magnetic biochar as well as preparation method and application thereof
  • Iron modified peanut shell magnetic biochar as well as preparation method and application thereof
  • Iron modified peanut shell magnetic biochar as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Such as figure 1 Shown, an iron-modified peanut shell magnetic biochar is prepared by the following steps:

[0036] (1) Wash the collected discarded peanut shells, place them in an oven, and dry them at 60°C for 48 hours at a low temperature to obtain completely dried peanut shells, which are then pulverized into powder with a pulverizer, and then the peanut shells are powdered 60 mesh sieve for use.

[0037] (2) Weigh 32.442g of anhydrous ferric chloride with a balance, dissolve it all in a glass bottle with 100mL of distilled water, and prepare a 2mol / L ferric chloride solution, then weigh 10g of sieved peanut shells The biomass was added to the prepared 100mL 2mol / L ferric chloride solution according to the solid-to-liquid ratio of 1:10, ultrasonically dispersed for 15min, and magnetically stirred for 24h to fully mix the two.

[0038] (3) Wash the soaked biomass several times, wash with distilled water until the supernatant is neutral (6.5-7.0), collect the solid ...

Embodiment 2

[0073] An iron-modified peanut shell magnetic biochar, prepared by the following steps:

[0074] (1) Wash the collected discarded peanut shells, put them in an oven, and dry them at 80°C for 48 hours at a low temperature until completely dried peanut shells are obtained, then crush them into powder with a pulverizer, and then grind the peanut shells into powder Pass through 80 mesh sieve for later use.

[0075] (2) Weigh a certain amount of anhydrous ferric chloride with a balance, dissolve it all in a glass bottle with 100mL distilled water, prepare a 1mol / L ferric chloride solution, and then weigh 10g of sieved peanuts The shell biomass was added to the prepared 100mL 1mol / L ferric chloride solution according to the solid-to-liquid ratio of 1:15, ultrasonically dispersed for 15min, and magnetically stirred for 24h to fully mix the two.

[0076] (3) The soaked biomass was washed several times, washed with distilled water until the supernatant was neutral, the solid matter on...

Embodiment 3

[0086] An iron-modified peanut shell magnetic biochar, prepared by the following steps:

[0087] (1) Wash the collected discarded peanut shells, put them in an oven, and dry them at 80°C for 48 hours at a low temperature until completely dried peanut shells are obtained, then crush them into powder with a pulverizer, and then grind the peanut shells into powder Pass through a 100-mesh sieve for later use.

[0088] (2) Weigh a certain amount of anhydrous ferric chloride with a balance, dissolve it all in a glass bottle with 100mL distilled water, prepare a 1mol / L ferric chloride solution, and then weigh 10g of sieved peanuts The shell biomass was added to the prepared 100mL 1mol / L ferric chloride solution according to the solid-to-liquid ratio of 1:10, ultrasonically dispersed for 15min, and magnetically stirred for 24h to fully mix the two.

[0089] (3) The soaked biomass was washed several times, washed with distilled water until the supernatant was neutral, the solid matter...

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Abstract

The invention belongs to the technical field of biochar materials and discloses iron modified peanut shell magnetic biochar as well as a preparation method and the application thereof. The preparationmethod comprises the following steps: taking peanut shells and ferric trichloride as raw materials, magnetizing by a method for soaking peanut shell biomass with a ferric trichloride solution, and performing oxygen limited thermal pyrolysis, so as to obtain the product. The iron modified peanut shell magnetic biochar is applied to an aqueous solution containing hexavalent chromium, the solution is overturned and oscillated at a room temperature, the iron modified magnetic biochar is separated from the solution after the reaction is completed, and aims of removing the hexavalent chromium in the water and separating and recovering the adsorbent are achieved. The method disclosed by the invention has the advantages of being low in cost, simple and convenient to operate, high in treatment efficiency and the like. Moreover, the adsorbent is wide in raw material source, the resource utilization of the biomass is realized, and the biochar has magnetism, is convenient to separate, recover andrecycle, does not cause secondary pollutions, and can be applied to treatment of industrial wastewater containing hexavalent chromium in electroplate factories, tannery factories, smelting plants andthe like.

Description

technical field [0001] The invention belongs to the technical field of biochar materials, and in particular relates to an iron-modified peanut shell magnetic biochar and a preparation method thereof, and its application in the field of heavy metal-containing wastewater treatment. Background technique [0002] With the rapid development of industry and the acceleration of urbanization, more and more industrial pollutants are discharged into the environment, among which heavy metal pollution is particularly serious. In water systems, heavy metals generally have high toxicity and refractory properties. After being discharged into the environment, heavy metal pollutants move alternately among various media, forming persistent pollution to the environment. While seriously endangering the ecosystem, they also It will pose a serious threat to human life and health. Therefore, how to scientifically and effectively solve the harm of heavy metal pollution to the environment and human...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/22
CPCB01J20/06B01J20/20B01J20/28009C02F1/283C02F2101/22
Inventor 王一瑶翟洪艳季民
Owner TIANJIN UNIV
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