Modified active carbon and preparation method 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 adsorption efficiency, prolonging service life and improving removal capacity
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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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