Preparation method, product and application of iron-loaded biochar

A biochar, iron-loaded technology, applied in chemical instruments and methods, catalyst activation/preparation, water pollutants, etc., can solve the problems of slow degradation of organic matter, difficult recycling of biochar materials, low degradation rate, etc. The effect of activation, short pyrolysis time, and efficient catalysis

Inactive Publication Date: 2020-09-01
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the use of biochar to activate persulfate has the disadvantages of slow degr

Method used

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  • Preparation method, product and application of iron-loaded biochar
  • Preparation method, product and application of iron-loaded biochar
  • Preparation method, product and application of iron-loaded biochar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Clean and shred the wheat straw, place it in a blast drying oven, dry it at 105°C for 10 hours, crush it, and pass it through a 100-mesh sieve for later use;

[0036] (2) The biomass obtained by sieving 3g step (1), 5.56g FeSO 4 ·7H 2 O and 3.54g of ascorbic acid were put into a polytetrafluoroethylene-lined bottle of an autoclave, mixed with water, heated at 160°C for 12h, cooled naturally, and vacuum-dried at 80°C for 24h to obtain material A;

[0037] (3) Material A is placed in a quartz boat, and in N 2 Under the atmosphere, place it in a tube furnace, heat up to 700°C at a rate of 10°C / min for pyrolysis for 120 minutes, and then naturally cool down to room temperature to obtain iron-loaded biochar, which is designated as Fe-BC1.

Embodiment 2

[0039] (1) Wash and shred the rice straw, place it in a blast drying oven, dry it at 100°C for 9 hours, crush it, and pass it through a 200-mesh sieve for later use;

[0040] (2) The biomass obtained by sieving 3g step (1), 2.5g FeSO 4 ·7H 2 O, 2.0g FeCl 3 ·6H 2 0 and 7.1 g of ascorbic acid were put into a polytetrafluoroethylene-lined bottle of an autoclave, mixed with water, heated at 120° C. for 24 hours, cooled naturally, and vacuum-dried at 50° C. for 16 hours to obtain material A;

[0041] (3) Material A is placed in a quartz boat, and in N 2 Under the atmosphere, place it in a tube furnace, heat up to 800°C at a rate of 12°C / min for pyrolysis for 150 minutes, and then naturally cool down to room temperature to obtain iron-loaded biochar, which is designated as Fe-BC2.

Embodiment 3

[0043] (1) Clean and shred the corn stalks, place them in a blast drying oven, dry them at 110°C for 12 hours, crush them, and pass them through a 100-mesh sieve for later use;

[0044] (2) The biomass obtained by sieving 3g step (1), 2g FeCl 2 , 2.7g Fe(NO 3 ) 3 Put 4.3g of ascorbic acid into a polytetrafluoroethylene-lined bottle of an autoclave, add water and mix thoroughly, heat at 140°C for 8 hours, cool naturally, and vacuum dry at 100°C for 8 hours to obtain material A;

[0045] (3) Material A is placed in a quartz boat, and in N 2 Under the atmosphere, place it in a tube furnace, heat up to 600°C at a rate of 8°C / min for pyrolysis for 100 minutes, and then naturally cool down to room temperature to obtain iron-loaded biochar, which is designated as Fe-BC3.

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Abstract

The invention discloses a preparation method, a product and application of iron-loaded biochar, and belongs to the technical field of material preparation. The preparation method comprises the following steps: drying, crushing and sieving biomass; putting the sieved biomass, a reducing agent and a soluble ferric salt into a container, adding water for mixing, then heating for reaction, and coolingand drying to obtain a material A after the reaction is finished; and heating and pyrolyzing the obtained material A to obtain the iron-loaded biochar. Iron and oxides thereof are formed on the surface of the biochar prepared by the method, so that the biochar has good magnetism and is beneficial to recovery and reutilization; when the catalyst is used for catalyzing persulfate to degrade organicwastewater, an efficient catalytic effect can be achieved, efficient removal of the organic wastewater is achieved, and a good using effect is achieved. According to the method for preparing the iron-loaded biochar, on the premise that the efficient catalytic performance of the biochar is guaranteed, the pyrolysis procedure can be rapidly completed.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a preparation method, product and application of iron-loaded biochar. Background technique [0002] Wastewater produced in industrial production processes (such as printing and dyeing, chemical industry, etc.) contains a large amount of highly toxic, high-concentration, and refractory organic pollutants. Traditional water pollution treatment methods are difficult to achieve efficient degradation of organic pollutants. Therefore, advanced oxidation technology (AOPs) came into being. Sulfate radicals based on the generation of activated persulfate have become a new type of advanced oxidation technology, which has been widely studied for the removal of refractory organic pollutants. Biochar activates persulfate to generate sulfate radicals. Because of its simple reaction system, mild reaction conditions, and no need for external light sources and heat sourc...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J23/745B01J35/10B01J37/08B01J37/16C02F1/72C02F101/30
CPCB01J23/745B01J27/24B01J35/0033B01J35/1004B01J37/084B01J37/16C02F1/725C02F2101/30
Inventor 黎想贾炎黎鹏秦杨
Owner HENAN NORMAL UNIV
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