Process of adsorbing nitrobenzene from raw water with powdered active carbon

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...

AI Technical Summary

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: