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Method for reducing organic pollution in environment by using black carbon

A technology for organic pollution and organic pollutants, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., to achieve the effect of reducing the risk of organic pollution, large amount, and long validity period

Inactive Publication Date: 2010-05-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no patent report on the preparation of black carbon with different surface characteristics by using black carbon precursors from different sources and applying it to the removal of organic pollutants in various environments.

Method used

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  • Method for reducing organic pollution in environment by using black carbon
  • Method for reducing organic pollution in environment by using black carbon
  • Method for reducing organic pollution in environment by using black carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Rice straw black carbon is applied to the removal of water environmental pollutants: 1) Pretreatment: cleaning rice straw, drying, crushing, and sieving; 2) Weighing an appropriate amount of rice straw into a porcelain crucible, capping it, and putting it into a muffle furnace , limited oxygen pyrolysis under the condition of 400 to obtain rice straw combustion residue; 3) add 10 grams of rice straw combustion residue into 200 mL of 2mol / L HCl solution, cover, shake, shake, centrifuge, wash to obtain the extract; Then add 200mL of 1mol / L HCl+1mol / L HF composite solution to soak the extract, oscillate and centrifuge, finally wash with deionized water, centrifuge, and dry the extract at 100°C to obtain rice straw black carbon. Its carbon content is 64.75%, and its specific surface area is 29.2m 2 / g, the pore volume is 0.0602mL / g, its morphology is shown in figure 1 -a, see the infrared spectrum figure 2 -a.

[0018] Weigh 0.005 g of rice straw black carbon into a 50 ...

Embodiment 2

[0020] Fly ash black carbon is applied to the removal of water environmental pollutants: the fly ash collected from the thermal power plant dust collector, 10 grams of fly ash is added to 200mL of 2mol / L HCl solution, covered and shaken, Centrifuge, wash, and obtain the extract; then add the extract to 200mL of 1mol / L HCl+1mol / L HF composite solution to soak the extract, oscillate and centrifuge, finally wash and centrifuge with deionized water, and store the extract at 80°C Drying to obtain fly ash black carbon, its carbon content is 29.68%, and its specific surface area is 21.0m 2 / g, the pore volume is 0.0358mL / g, its morphology is shown in figure 1 -b, see the infrared spectrum figure 2 -b. Weigh 0.05g of fly ash black carbon into a 50mL glass centrifuge tube, add 30mL of 1ppm pentachlorophenol standard solution. Seal and vibrate at a constant temperature for 24 hours, centrifuge and measure pentachlorophenol in the supernatant, and calculate that the removal rate of p...

Embodiment 3

[0022] Automobile exhaust black carbon is applied to the removal of water environmental pollutants: with reference to the method of Example 2, the collected automobile exhaust soot is treated with bis-acid to remove heavy metal salts and oxides, washed and dried to obtain automobile exhaust black carbon Carbon, which has a carbon content of 91.46% and a specific surface area of ​​50.5m 2 / g, the pore volume is 0.155mL / g, its morphology is shown in figure 1 -c, see the infrared spectrum figure 2 -c. Weigh 0.02g of automobile exhaust black carbon into a 50mL glass centrifuge tube, and add 30mL of 20ppm pentachlorophenol standard solution. Seal and vibrate at a constant temperature for 24 hours, centrifuge and measure pentachlorophenol in the supernatant, and calculate that the removal rate of pentachlorophenol reaches 69.3%.

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Abstract

The invention provides a method for reducing organic pollution in the environment by using black carbon. The black carbon mainly comprises biomass black carbon, fly ash black carbon, and automobile tail gas black carbon; in the method, the black carbon is directly added to adsorb organic pollutants in soil, sediments and water bodies, the black carbon is added to the waste water to be treated in a weight ratio of the black carbon to the waste water to be treated of 1:100-10,000 and uniformly stirred so as to remove the organic pollutants in the waste water, and the black carbon is added to the soil or sediments to be treated in a weight ratio of the black carbon to the soil or sediments to be treated of 1:20-200 and uniformly stirred so as to remove the organic pollutants in the soil or sediments; and for the preparation of the black carbon, the various black carbon raw materials undergo dioic acid treatment to remove salt and oxides so as to obtain the black carbon. The method has the advantages of wide source and large quantity of the adsorbing materials, and the particular suitability for the emergency treatment of the organic pollution in the environment.

Description

technical field [0001] The invention relates to the control and restoration of organic pollution in the environment, in particular to a method for reducing organic pollution in the environment with black carbon. Background technique [0002] With the development of industry and agriculture, more and more organic pollutants (such as pesticides, polycyclic aromatic hydrocarbons, etc.) enter the environment, and reducing organic pollution has become a key and difficult issue in the environmental field worldwide. Adsorption is a widely used method for the removal of persistent organic pollutants. The commonly used adsorbents in China are mainly activated carbon, but the cost of activated carbon is relatively high. It is of great significance to develop new types of efficient and cheap organic pollution adsorption treatment agents. [0003] Black carbon is a kind of amorphous carbon produced by incomplete combustion of carbon-containing substances. About 5 million tons to 200 mil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30C02F1/28
Inventor 楼莉萍罗玲崔昕意吴滨滨郑乐陈英旭
Owner ZHEJIANG UNIV
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