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Preparation method and application of sludge activated carbon

A sludge activated carbon and sludge drying technology, which is applied in sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of not finding a preparation method for sludge activated carbon, and achieve a simple and easy preparation method line, avoid pollution, reduce the effect of treatment costs

Inactive Publication Date: 2014-01-08
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the research on the adsorption of perchlorate in water by sludge activated carbon is still in the exploratory stage, and no method for preparing sludge activated carbon that can effectively adsorb perchlorate in water has been found.

Method used

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  • Preparation method and application of sludge activated carbon
  • Preparation method and application of sludge activated carbon
  • Preparation method and application of sludge activated carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation method of the sludge activated carbon of the present embodiment may further comprise the steps:

[0036] (1) After drying the remaining sludge from the sewage treatment plant at 105°C for 48 hours, crush it and pass it through 200-mesh and 300-mesh sieves successively, take 10g of the sieved sludge and put it into a tubular resistance furnace, and use 80mL / Ammonia gas was introduced at a flow rate of 25°C / min, the temperature was raised to 110°C at a rate of 25°C / min, and the temperature was raised to 110°C for 5 minutes, then the temperature was raised to a final reaction temperature of 500°C at a rate of 25°C / min, and the temperature was raised to 500°C at a rate of 25°C / min. pH=6.8, and finally dried at a constant temperature of 105°C for 24 hours to obtain sludge activated carbon powder raw material;

[0037] (2) Add 10g of sludge activated carbon powder raw material to 200mL of hydrogen peroxide solution with a mass concentration of 10%, then oscil...

Embodiment 2

[0043] The sludge activated carbon of the present embodiment handles the application of low-concentration perchlorate aqueous solution, comprises the following steps:

[0044] The adsorption system adopted in this embodiment, such as Figure 4 shown. The adsorption system includes an adsorption column 2, the two ends of the adsorption column 2 are respectively connected with the water inlet pipe 5 and the water outlet pipe 1, the water inlet pipe 5 is connected with a peristaltic pump 6, and the end of the water inlet pipe 5 far away from the adsorption column 2 is passed into the original solution Pool 7.

[0045] Concrete implementation is as follows: be 10cm with a length, the plexiglass column that diameter is 6cm is as adsorption column 2, offers a diameter along the length direction and is the through packed column 4 of 3mm, respectively widens a length at packed column 4 two ends. 8mm and 6mm in diameter threaded holes, respectively install a metal casing with an inne...

Embodiment 3

[0049] The regeneration of the sludge activated carbon of the present embodiment and application thereof, comprises the following steps:

[0050] The fully penetrated sludge activated carbon was dried at 105°C for 24 hours, then heated to 500°C in a microwave oven under the protection of nitrogen, and kept at a constant temperature for 10 minutes. 2 Under the environment heated to 800 ℃ for 60min, the regenerated sludge activated carbon was obtained; the regenerated sludge activated carbon was continued to be put back into the packed column 4, and the concentration was 80 μg / L sodium perchlorate aqueous solution under the same adsorption conditions as in Example 2 for adsorption.

[0051] The results showed that perchlorate ions were not detected when the treated water volume was 2000BV, and the water sample volume was 4020BV when the regenerated sludge activated carbon completely penetrated. After calculation, the adsorption capacity of activated carbon from recycled sludge ...

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Abstract

The invention discloses a preparation method of sludge activated carbon. The preparation method of the sludge activated carbon comprises the following steps that surplus sludge taken from a sewage treatment plant is dried, smashed and screened, and then the sludge activated carbon is obtained through pyrolysis treatment, oxidation treatment, ammonification treatment and methylation treatment. The invention further relates to the application of the sludge activated carbon obtained through the preparation method for treating low-concentration perchlorate waste water. The preparation method is simple, easy to implement and low in cost, the prepared sludge activated carbon is high in adsorption capacity, recyclable and capable of effectively treating low-concentration perchlorate solutions, and secondary pollution cannot be caused in the adsorption process.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a preparation method of sludge activated carbon and an application for treating low-concentration perchlorate wastewater. Background technique [0002] Over the years, perchlorate has been widely used in rocket propellants, pyrotechnics manufacturing, arms industry, automobile air bags, highway safety flash boards and other fields, and is also used as an additive in lubricating oil, fabric fixatives, electroplating, etc. In the production of liquid, leather tanning agent, rubber products, fuel paint, smelted aluminum and magnesium batteries and other products. The chemical fertilizers used in agricultural production, which use Chilean saltpeter as raw material, also contain a certain concentration of perchlorate. The large-scale use of the substance makes a large amount of perchlorate enter the natural water body, and even pollute drinking water. Since perchlorate is a new type o...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F11/00C02F1/28C02F101/12
Inventor 翟云波庞道雄陈红梅
Owner HUNAN UNIV
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