Activated carbon adsorption is a method to remove one or more substances from water by adsorbing porous activated carbon on the surface of activated carbon. The removal targets include soluble organic matter, synthetic detergent, microorganism, virus and a certain amount of heavy metals, and can decolorize, deodorize and purify the air.
Activated carbon, sulfonated coal, zeolite, coke, etc. Are commonly used adsorbents for water treatment. After activation, the carbon lattice of activated carbon forms developed pores with different shapes and sizes, which greatly increases the specific surface area and improves the adsorption capacity. The effective pore radius of activated carbon is generally 1- 10000nm, the pore radius is below 2nm, the transition pore radius is generally 2-10000 nm, and the macropore radius is10000 nm. The pore volume is generally 0. 15-. Macropore volume is generally 0.2-0.5 ml/g.
Activated carbon is a very fine carbon particle with a large surface area, and there are even smaller pores-capillaries in the carbon particle. This kind of capillary tube has a strong adsorption capacity, and because of the large surface area of carbon particles, it can fully contact with gas (impurities). When these gases (impurities) contact the capillary, they are adsorbed and play a purification role. It is very important to study the surface area of activated carbon. The specific surface area data of activated carbon can only be true and reliable by BET method. There are many instruments in China that can only be compared directly. At present, the multi-point BET method is used to measure the specific surface area at home and abroad, and the standards for measuring the specific surface area at home and abroad are based on the BET method. Please refer to China's national standard (GB/T19587-2004)-the method of measuring the specific surface area of solid materials by gas adsorption BET principle. Detection of specific surface area is actually a time-consuming work. Due to the different adsorption capacity of samples, the testing of some samples may take a whole day. If the test process is not fully automated, the tester can't leave all the time. He should be highly concentrated, observe the dashboard and control the knob. A little carelessness will lead to the failure of the testing process and waste a lot of valuable time for testers. F-Sorb 2400 specific surface area tester is an instrument that can really realize the BET method (using direct comparison method). More importantly, F-Sorb 2400 specific surface area tester is the only fully automatic and intelligent specific surface area testing equipment in China. The test results are highly consistent with international standards and have good stability. At the same time, human error is reduced and the accuracy of test results is improved.