Biological carbon catalyst, iron carbon catalyst and application of biological carbon catalyst

An iron-carbon catalyst and biochar technology are applied in the fields of environmental engineering and pollution treatment engineering, which can solve the problems of inability to effectively degrade pollutants, easy passivation of iron-carbon materials, low catalytic efficiency, etc., and achieve enhanced adsorption and catalytic performance, saving energy Effects of usage, significant environmental and economic advantages

Active Publication Date: 2016-06-29
YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Studies have shown that biochar is an effective adsorbent, which can adsorb high concentrations of heavy metals in water and soil, and has a slow desorption rate, and can also adsorb some organic pollutants.
However, biochar only adsorbs some organic pollutants, and cannot effectively degrade pollutants, and there is a great deficiency in the adsorption of heavy metals bound by complexes, so necessary modification treatment should be carried out on biochar
[0011] Iron-carbon materials can effectively combine adsorption and catalytic performance, and are widely used in wastewater treatment, but ordinary iron-carbon materials are easy to passivate, and the catalytic efficiency is not high.

Method used

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  • Biological carbon catalyst, iron carbon catalyst and application of biological carbon catalyst
  • Biological carbon catalyst, iron carbon catalyst and application of biological carbon catalyst
  • Biological carbon catalyst, iron carbon catalyst and application of biological carbon catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0054] 1. Preparation of biochar catalyst

[0055] The preparation method of biochar catalyst, the specific steps are as follows:

[0056] (1) Take the straw, wash it, air-dry it, then crush it, pass it through a 2mm sieve, and then pyrolyze it at 300-700°C for 2-4 hours under anaerobic conditions, and then carbonize it; 1mol / L hydrochloric acid was treated for 2 to 4 hours to remove ash, washed with distilled water until the washing liquid became neutral, and dried at 80°C to obtain biochar.

[0057] (2) Weigh a certain amount of biochar and add it to a certain amount of cerium chloride, FeCl 3 and FeSO 4 mixed solution of which FeCl 3 and FeSO 4 The ratio of the amount of the substances to the mixture is 2:1. Under the protection of nitrogen, add 6 mol / L NaOH solution dropwise to the above mixture to pH 10 while stirring, and continue to stir for 12-24 h; after stirring, remove the supernatant, After washing the remaining solid with deionized water for 3 times, under ni...

Embodiment 2

[0072] 1. Preparation of biochar catalyst

[0073] The preparation method of biochar catalyst, the specific steps are as follows:

[0074] (1) Take the straw, wash it, air-dry it, then crush it, pass it through a 2mm sieve, and then pyrolyze it at 300-700°C for 2-4 hours under anaerobic conditions, and then carbonize it; 1mol / L hydrochloric acid was treated for 2 to 4 hours to remove ash, washed with distilled water until the washing liquid became neutral, and dried at 80°C to obtain biochar.

[0075] (2) Weigh a certain amount of biochar and add it to a certain amount of cerium chloride, FeCl 3 and FeSO 4 mixed solution of which FeCl 3 and FeSO 4 The ratio of the amount of the substances to the mixture is 2:1. Under the protection of nitrogen, add 6 mol / L NaOH solution dropwise to the above mixture to pH 10 while stirring, and continue to stir for 12-24 h; after stirring, remove the supernatant, After washing the remaining solid with deionized water for 3 times, under ni...

Embodiment 3

[0119] 1. Preparation of biochar catalyst

[0120] The preparation method of biochar catalyst, the specific steps are as follows:

[0121] (1) Take the straw, wash it, air-dry it, then crush it, pass it through a 2mm sieve, and then pyrolyze it at 300-700°C for 2-4 hours under anaerobic conditions, and then carbonize it; 1mol / L hydrochloric acid was treated for 2 to 4 hours to remove ash, washed with distilled water until the washing liquid became neutral, and dried at 80°C to obtain biochar.

[0122] (2) Weigh a certain amount of biochar and add it to a certain amount of cerium chloride, FeCl 3 and FeSO 4 mixed solution of which FeCl 3 and FeSO 4 The ratio of the amount of the substances to the mixture is 2:1. Under the protection of nitrogen, add 6 mol / L NaOH solution dropwise to the above mixture to pH 10 while stirring, and continue to stir for 12-24 h; after stirring, remove the supernatant, After washing the remaining solid with deionized water for 3 times, under ni...

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Abstract

The invention discloses a biological carbon catalyst, an iron carbon catalyst and application of the biological carbon catalyst. According to the biological carbon catalyst, biological carbon serves as a carrier and is loaded with rare earth metal oxide and Fe3O4, by mass percentage, the loading amount of the rare earth metal oxide is 0.8-5%, the loading amount of Fe3O4 is 5-15%, the particle size of the rare earth metal oxide is 10-100 nm, and the particle size of Fe3O4 is 10-100 nm. Biological carbon is loaded with the nano-scale rare earth metal oxide and Fe3O4, the catalyst which can be applied to treating sewage containing heavy metal and persistent organic pollutants is prepared and obtained, the catalyst is high in catalysis efficiency, and the sewage treatment effect can be remarkably improved.

Description

technical field [0001] The invention relates to the fields of environmental engineering and pollution treatment engineering, in particular to a biochar catalyst, an iron-carbon catalyst and applications thereof. Background technique [0002] Can adsorb organic halides (AOX), nitrobenzenes, anilines and other substances as important chemical raw materials, intermediates, solvents and are widely used in dyes, printing and dyeing, pharmaceuticals, pesticides and other industries, so they are widely used in wastewater pollution. . The chemical properties of these pollutants are stable, difficult to biodegrade, highly toxic and harmful, so they are required to be strictly controlled in the discharge of industrial wastewater and listed in the relevant discharge standards. [0003] In recent years, my country's related wastewater discharge standards have become increasingly strict. For example, the new standard issued by the printing and dyeing industry, "Water Pollutant Discharge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C02F9/04C02F101/20C02F101/30C02F101/36C02F101/38
CPCB01J23/83C02F1/56C02F1/70C02F1/725C02F9/00C02F2101/20C02F2101/30C02F2101/36C02F2101/38
Inventor 徐灿灿刘锐陈吕军
Owner YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG
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