Process of adsorbing nitrobenzene from raw water with powdered active carbon

A technology of powder activated carbon and nitrobenzene, which is used in adsorption water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the problem that the removal effect cannot reach drinking water, the removal rate of nitrobenzene is low, and the residence time Shortage and other problems, to achieve the effect of high security guarantee rate, strong feasibility and quality improvement

Inactive Publication Date: 2007-06-27
HARBIN INST OF TECH
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Problems solved by technology

[0003] In order to solve the problem that the removal effect of nitrobenzene in raw water by the existing advanced oxidation or catalytic oxidation method still cannot reach the index of drinking water, and at the same time, the operability is poor when faced with high-concentration nitrobenzene pollution; Because the residence time of water in the filter bed is very short, the removal rate of nitrobenzene in the raw water is low in the case of high-concentration nitrobenzene pollution. A method of using powdered activated carbon to adsorb nitrobenzene in raw water is provided. Method, the concrete technical scheme that solves the above-mentioned problem is as follows:

Method used

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specific Embodiment approach 1

[0008] Specific embodiment one: the steps of this embodiment method are as follows:

[0009] Step 1. The finished wood powder activated carbon particles, the mesh number of which is 150-250 mesh, is made into a homogeneous suspended powder activated carbon emulsion with water, and the wood powder activated carbon content is 10-80mg / L lotion;

[0010] Step 2. Mix wood powder activated carbon emulsion and raw water into the water delivery pipeline to flow together. The contact time between wood powder activated carbon and raw water is 2 to 3 hours; make wood powder activated carbon and nitrobenzene fully contact and adsorb to achieve the purpose of effective removal .

[0011] Step 3: After the water mixed with the wood powder activated carbon emulsion passes through the reaction tank, sedimentation tank, sand filter and disinfection, drinking water with a nitrobenzene content of 0.002-0.014 mg / L is obtained.

[0012] The dosage of the above-mentioned wood powder activated ca...

specific Embodiment approach 2

[0013] Specific embodiment two: the difference between this embodiment and specific embodiment one is that when the nitrobenzene content in the raw water exceeds 3 times of the national drinking water standard value upper limit 0.017mg / L, in step one, the content of wood powder activated carbon is 20mg / L The emulsion of L; step 2, the contact time of wood powder activated carbon and raw water is 3h. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0014] Specific embodiment three: the difference between this embodiment and specific embodiment one is that when the nitrobenzene content in raw water exceeds 20 times of the national drinking water standard value upper limit 0.017mg / L, in step one, the content of wood powder activated carbon is 40mg / L The emulsion of L; step 2, the contact time of wood powder activated carbon and raw water is 2.5h. Other steps are the same as in the first embodiment.

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Abstract

The process of adsorbing nitrobenzene from raw water with powdered active carbon can eliminate nitrobenzene effectively. The process includes the following steps: 1. throwing wooden powdered active carbon in 10-80 mg/l to the water catchment; 2. mixing wooden powdered active carbon with water and flowing in the pipeline for 2-3 hr; and 3. treating the water with mixed wooden powdered active carbon in the reaction tank, settling basin, sand filter and disinfector to obtain drinking water with nitrobenzene content lower than 0.002-0.014 mg/l. The present invention has low investment, low cost, high safety and other advantages.

Description

technical field [0001] The invention relates to a method for removing nitrobenzene in raw water. Background technique [0002] Nitrobenzene undergoes transformation in the human body, and the highly water-soluble transformant is excreted through the kidneys to complete its detoxification process; it will also remain in the body, causing methemoglobinemia, hemolysis and liver damage. Therefore, my country's "Surface Water Environmental Quality Standard" (GB3838-2002) stipulates that the concentration of nitrobenzene in source water should be lower than 0.017mg / L. Nitrobenzene in drinking water mainly comes from wastewater from chemical plants and dye factories, especially from aniline dye factories; accidents during storage and transportation can also cause serious nitrobenzene pollution. In November 2005, the explosion in the chemical workshop of Jilin Petrochemical Company caused serious pollution to the water source of Songhua River. The detection data of Jilin Songyuan m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58C02F1/28
Inventor 崔福义张悦李伟光赵志伟韩雪冬吕德全
Owner HARBIN INST OF TECH
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