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Biochar prepared from banana peel, preparation method and application thereof

A technology of biochar and banana peel, applied in the field of agricultural chemistry, can solve the problems of environmental pollution, negative impact of production, waste of resources, etc., and achieve the effect of large specific surface area, strong adsorption capacity, and full utilization of resources

Active Publication Date: 2016-10-12
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is discarded as waste in the field, it will waste resources and pollute the environment. At the same time, it will also spread some latent germs, which will have a negative impact on production.

Method used

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  • Biochar prepared from banana peel, preparation method and application thereof
  • Biochar prepared from banana peel, preparation method and application thereof
  • Biochar prepared from banana peel, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] After the banana peel waste was pulverized, 40 mesh particles were selected, and 5 g of banana peel biomass was mixed with 25 g of 20% KOH aqueous solution according to the mass ratio of banana peel biomass and KOH aqueous solution as 1:5, stirred evenly and then left to stand for 2 h. Wash with deionized water until neutral, filter and dry, stir 5g of biochar precursor and 10ml of 60% hydrochloric acid aqueous solution according to the ratio of solid / liquid ratio of 1g:2ml, and then seal them into an autoclave. Under the condition that the heating rate of the electric furnace is 10-20°C / min, conduct hydrothermal carbonization at 180°C for 16 hours, wash with deionized water until neutral after natural cooling, filter, dry at 110°C for 12 hours, and grind to obtain biological Carbon material, the SEM image of the prepared biochar is shown in figure 1 . The FTIR spectrum of the prepared biochar is shown in Figure 10 The spectrum of "sample 1" ( Figure 10 1st spectra...

Embodiment 2

[0050] After the banana peel waste was pulverized, 50 mesh particles were selected, and 5 g of banana peel biomass was mixed with 15 g of 10% KOH aqueous solution according to the mass ratio of banana peel biomass and KOH aqueous solution as 1:3. Wash with deionized water until neutral, filter and dry, stir 5g of biochar precursor and 20ml of phosphoric acid solution with a concentration of 20% according to the ratio of solid / liquid ratio of 1g:4ml, and then seal them into a high-pressure reactor. Under the condition that the heating rate of the electric furnace is 10-20°C / min, conduct hydrothermal carbonization at 190°C for 14 hours, wash with deionized water until neutral after natural cooling, filter, dry at 110°C for 12 hours, and grind to obtain biological Carbon material, the SEM image of the prepared biochar is shown in figure 2 . The FTIR spectrum of the prepared biochar is shown in Figure 10 The spectrum of "sample 2" ( Figure 10 2nd spectral line from top to bo...

Embodiment 3

[0053] After the banana peel waste is pulverized, select 60-mesh particles, mix 10g of banana peel biomass with 40g of 20% NaOH aqueous solution according to the mass ratio of banana peel biomass and NaOH aqueous solution as 1:4, stir evenly and let stand for 3h, use Wash with deionized water until neutral, filter and dry, stir 5g of biochar precursor and 30ml of sulfuric acid aqueous solution with a concentration of 20% according to the solid / liquid ratio of 1g: 6ml, and then seal them into a high-pressure reactor. Under the condition that the heating rate of the electric furnace is 10-20°C / min, conduct hydrothermal carbonization at 200°C for 12 hours, wash with deionized water until neutral after natural cooling, filter, dry at 110°C for 12 hours, and grind to obtain biological Carbon material, the SEM image of the prepared biochar is shown in image 3 . The FTIR spectrum of the prepared biochar is shown in Figure 10 The spectrum of "sample 3" ( Figure 10 3rd spectral l...

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Abstract

The invention discloses a method for preparation of biochar from banana peel. The method comprises the steps of: (1) crushing banana peel, then mixing the crushed banana peel with an aqueous solution of an activator, and performing standing; then carrying out washing and drying to obtain a biochar precursor, wherein the activator is at least one of alkali metal hydroxide, lewis acid and peroxide; (2) mixing the biochar precursor with an acid solution, then carrying out hydrothermal charring reaction at 180DEG C-260DEG C, and at the end of the hydrothermal charring reaction, carrying out washing and drying to obtain the biochar. In addition, the invention also comprises the biochar prepared by the method and application of the biochar to adsorption of heavy metals. The method provided by the invention utilizes agricultural production waste to prepare a biochar adsorbent by simple and rapid hydrothermal charring method, turns waste into treasure, makes full use of resources, reduces environmental pollution, has good economic benefits, develops new technology, and is beneficial to industrial production.

Description

technical field [0001] The invention relates to the field of agricultural chemistry, and particularly designs a method for preparing biochar from banana peels, which is applied to the adsorption of heavy metal ions in water bodies and soil environments. Background technique [0002] Since the beginning of my country's industrialization, heavy metals have continuously eroded cultivated land, and the area of ​​cultivated land polluted by heavy metals has doubled, which has become a key problem that seriously threatens my country's food security and development. Coupled with the continuous advancement of China's modernization process, people are paying more and more attention to food safety. It is urgent to solve the problem of food safety in order to enrich the country, stabilize social order, and achieve sustainable development. [0003] Biochar is a kind of charcoal with extremely high carbon content formed by high-temperature pyrolysis and carbonization of biomass (crop was...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/02B01J20/20B01J20/30B01J20/28C02F1/28C02F101/20
CPCB01J20/20B01J20/28016B01J20/28064B01J20/28066C02F1/283C02F2101/20C10B53/02Y02E50/10
Inventor 周南周智陈鸿钢
Owner HUNAN AGRICULTURAL UNIV
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