A kind of sesame core biochar and its preparation method and application

A biochar and sesame core technology, applied in the field of materials, can solve problems such as unfavorable environmental sustainable development, catalytic performance needs to be strengthened, greenhouse gas emissions, etc., achieve good use value and application prospects, excellent graphitized structure, and increase porosity Effect

Active Publication Date: 2022-03-22
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalytic performance of ordinary biochar still needs to be strengthened, so the development of a new green biochar material with both high catalytic performance and low cost is of great significance to promote the development of persulfate oxidation technology.
[0003] Sesame is a common crop in northern my country, and the residues of sesame crops (such as sesame leaves and sesame stalks), as a kind of agricultural waste, are often directly incinerated, which not only causes a waste of resources, but also causes a large amount of greenhouse gas emissions. , is not conducive to the sustainable development of the environment
However, when preparing biochar directly from sesame straw or sesame leaves, there are still disadvantages such as small specific surface area, poor adsorption performance, and poor catalytic performance.

Method used

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  • A kind of sesame core biochar and its preparation method and application
  • A kind of sesame core biochar and its preparation method and application
  • A kind of sesame core biochar and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A method for preparing sesame core biochar, which is prepared by calcining and acid treatment (acid modification) with the sesame core of sesame stalks as raw material, comprising the following steps:

[0040] (1) Separate (peel) the inner core of the sesame stalk from the sesame stalk to obtain the sesame core; use ultrapure water to wash the sesame core, dry it, grind it with a pulverizer, and pass through a 200-mesh sieve (0.075mm ), to obtain the sesame core raw material powder; place the sesame core raw material powder in ultrapure water, ultrasonically clean for 30 min, dry, and set aside.

[0041] (2) Put the raw material powder of sesame cores ultrasonically cleaned and dried in step (1) in a tube furnace, heat up to 800°C at a rate of 5min / °C under nitrogen atmosphere, and keep the temperature for calcination for 2h.

[0042] (3) Place the calcined powder in step (2) in 2M hydrochloric acid solution, stir continuously at a speed of 200r / min for 12h, carry out a...

Embodiment 2

[0055] An application of sesame core biochar in removing organic pollutants in water, specifically utilizing sesame core biochar to activate sodium peroxodisulfate to degrade phenol in water, comprising the following steps:

[0056] Get three parts of volume and be 30mL, the concentration is the phenol solution of 15mg / L, place respectively in three 50mL Erlenmeyer flasks, add the sesame core biochar that makes in the embodiment 1 of different doses respectively, make the sesame core biological charcoal in the solution The concentration of charcoal is 0.11g / L, 0.22g / L and 0.42g / L. At the same time, sodium peroxodisulfate is added to make the concentration 1g / L. Stir at a temperature of 25°C and a shaking rate of 200rpm. The mixed solution was reacted (oxidative degradation treatment), and the reaction time was 180min. After the treatment, the sesame core biochar is separated from the solution to realize catalyst recovery and complete the degradation and removal of organic matt...

Embodiment 3

[0067]An application of sesame core biochar in removing organic pollutants in water, specifically utilizing sesame core biochar to activate sodium peroxodisulfate to degrade phenol in water under different pH conditions, comprising the following steps:

[0068] The sesame core biochar prepared in Example 1 was added to the phenol solutions with a pH of 3.21, 4.98, 6.76, 9.07, and 11.08 respectively (these phenol solutions had a volume of 30 mL and a concentration of 15 mg / L), so that the sesame seeds in the solution The concentration of the core biochar is 0.11g / L, and sodium peroxodisulfate is added separately so that the concentration is 1g / L, and the mixed solution is stirred under the conditions of a temperature of 25°C and a shaking rate of 200rpm to react, and the reaction time is 180min. After the treatment, the sesame core biochar is separated from the solution to realize catalyst recovery and complete the degradation and removal of organic matter phenol.

[0069] In ...

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Abstract

The invention discloses a sesame core biochar and its preparation method and application. The preparation method of the sesame core biochar comprises the following steps: calcining the sesame core, acid treatment, washing and drying to obtain the sesame core biochar. The sesame core biochar prepared by the preparation method of the present invention has a large specific surface area, a rich structure, a uniform mesopore size distribution, and an excellent graphitized structure. It is a new type of biochar material and has good properties for persulfates. The activation effect can realize the efficient removal of organic pollutants, which has good use value and application prospect; at the same time, the sesame core biochar mainly contains two elements such as C and O, and does not contain metal elements, and there is no metal dissolution and other secondary pollution risks, strong compatibility with the environment, and high ecological security. The preparation method of the present invention has the advantages of simple process, convenient operation, low cost, no need to make additional pores, etc., is suitable for large-scale preparation, and is beneficial to industrial application.

Description

technical field [0001] The invention belongs to the field of material technology and the field of advanced oxidation treatment of organic pollutants, and relates to a sesame core biochar and its preparation method and application, in particular to a preparation method of sesame core biochar and activated persulfuric acid of the sesame core biochar The application of salt to degrade organic pollutants in water. Background technique [0002] With the discharge of a large amount of industrial wastewater and domestic sewage, water bodies such as rivers, lakes and seas have been seriously polluted, among which organic matter pollution is particularly serious. Refractory organic substances such as medicines and personal care products enter the water environment and stay in the environment for a long time. It is difficult to remove them through water self-purification, and these organic substances are easy to accumulate in the environment, which will eventually break the balance of...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30B01J21/18B01J35/10C02F1/28C02F1/72C02F101/30
CPCB01J20/20B01J20/28054C02F1/725C02F1/283B01J21/18C02F2101/30B01J35/60
Inventor 汤琳刘雅妮张浩冯程洋冯浩朋
Owner HUNAN UNIV
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