Modified active carbon , preparation method and application thereof

A technology of activated carbon and modification, applied in the direction of adsorption water/sewage treatment, etc., to achieve the effect of improving removal capacity, prolonging service life and improving adsorption efficiency

Inactive Publication Date: 2012-12-19
HARBIN ENG UNIV
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

Since the current reports mostly evaluate the adsorbability of typical phenolic endocrine disruptors on activated carbon, the adsorption efficiency of activated carbon, and the comparison of adsorption performance between activated carbon and other adsorbents, only a few literatures consider the type and service life of activated carbon during the adsorption process. In view of the impact on its application, in view of the fact that the physical and chemical properties of the surface of activated carbon have been confirmed by a large number of studies to directly affect the adsorption performance of activated carbon, it is necessary to explore a modification method to fundamentally improve and improve the adsorption of activated carbon to phenolic endocrine disruptors in water. efficacy

Method used

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specific Embodiment approach 1

[0021] Specific embodiment one: the preparation method of the modified activated carbon of the present embodiment is as follows: the activated carbon whose particle size is between 0.4~2mm is placed in the quartz tube of the muffle furnace, and nitrogen gas is first passed through the muffle furnace at room temperature for 1.25 hours, The gas flow rate is 100 ml / min, and then under the protection of the same nitrogen flow, the temperature of the muffle furnace is raised to 500°C at a rate of 10°C / min, and kept for 3 hours. After the temperature drops to 25°C, the nitrogen flow is stopped and continued to The flow rate of 100 ml / min is passed through air for 1 hour, and the activated carbon is taken out to be modified carbon. Activated carbon needs to be washed repeatedly with deionized water before modification until the pH value of the water remains unchanged, and it can be used directly after modification.

specific Embodiment approach 2

[0022] Specific embodiment two: the water treatment method that the modified carbon of the present invention is used as adsorbent is implemented according to the following process: the filtered water containing phenolic endocrine disruptors after the conventional coagulation, sedimentation and filtration processes are processed, enter the interior filled with The reactor of modified activated carbon performs adsorption reaction. The modified activated carbon exists in the form of a fixed bed or a fluidized bed in the adsorption reactor. The contact time between the modified activated carbon and water is controlled for 10 to 30 minutes, and the water flow rate is 1 to 10 m / Hour. When the fixed bed form is used, the modified activated carbon needs to be loaded into the reactor in advance, the height of the carbon bed is between 0.5m and 1.5m, and the filtered water can enter the reactor in three ways: forward flow, counter flow and mixed flow Among them, the downstream type is ...

specific Embodiment approach 3

[0023] Specific embodiment 3: The difference between this embodiment and specific embodiment 2 is that the raw water is not subjected to conventional filtration treatment, but is directly adsorbed through an adsorption reactor filled with modified activated carbon, and other process conditions and settings are the same as those of specific embodiment 2. same.

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Abstract

The invention provides a modified active carbon and a preparation method application thereof. The method comprises the following steps of: placing active carbon into a quartz pipe of a muffle furnace; filling nitrogen in the muffle furnace at room temperature for 1-2 hours, wherein the gas flow rate is 80-120ml / min; then heating the muffle furnace to 400-800 DEG C at the speed of 10 DEG C / min under the protection of the same nitrogen flow and maintaining for 1-4 hours; after the temperature is reduced to 25 DEG C, stopping filling the nitrogen; continuously filling air at the flow rate of 80-120ml / min for 1hour and taking out to obtain the modified active carbon. The modified active carbon is used as an adsorbent and used for removing organic pollutants in the process of water treatment, has the advantages of high purifying ability and long service life and particularly can solve the problem of poor maneuverability on high-concentration phenol endocrine distributing object polluted water by the traditional water treatment method.

Description

(1) Technical field [0001] The invention relates to a modified activated carbon, the invention also relates to a preparation method of the activated carbon, and the application method of the modified activated carbon as an adsorbent in water treatment for removing phenolic endocrine disruptors. (2) Background technology [0002] Since the beginning of the 21st century, with the acceleration of my country's social development, the situation of water pollution in my country has become more and more serious, and water sources in various places have been polluted to varying degrees, especially the occurrence of various sudden water pollution incidents. Challenge the conventional water treatment technology currently used in our country. Among all kinds of water source pollutants, the harm of organic pollution to human beings and organisms cannot be ignored, especially the relatively low content of organic pollutants found in recent years, such as: persistent organic pollutants, di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/08C02F1/28
Inventor 刘桂芳李旭春马军任芝军朱丽楠官涤刘慧
Owner HARBIN ENG UNIV
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