Researching Of Influencing Factors In Adsorbing Indoor Formaldehyde With Modify Activated Carbon

With the popularization of the indoor decoration and the increasing degree of indoor airtight , the air pollution interior is more and more serious. Especially the density of formaldehyde gas in the environment universally exceeds the standard.It has been paid attention to about the pollution and the disposal of indoor HCHO gas.The purpose of this paper is comparing the effect of adsorbing HCHO gas by the activated charcoal with different conditions through the simulation test. Then seeks for the best adsorption conditions. Establish the theoretical foundation for the marketization of disposaling indoor HCHO gas with the activated charcoal.Research technique: In the airtight experiment-box, releases HCHO gas into the box, forms the air environment with certain density HCHO gas, puts the activated charcoal which has different conditions into the box, through measuring the density change of HCHO indoor, compares the adsorption performance of the activated charcoal with different conditions. Through the experimental study, draws following conclusion:First, studies of the ordinary activated charcoal:1, There are good disposaling rates that adsorb the indoor HCHO gas with the activated charcoal, then the indoor HCHO gas density can be got the standard.2, in the same space, when the pellet activated charcoal is used more, the HCHO gas elimination rate is more higher.It is about 4-5h to get the saturation state of the adsorption. After saturated,there has phenomenon of the HCHO gas analyzing from the activated charcoal3, The speed of adsorbing HCHO by pellet activated charcoal is better than the powder's, but the final effection is not too difference. the penetration time possibly can be postponed ,if suitably reduces the particle size of the activated charcoal, and the analyzing will be postponed too.Second, studies of the modified activated charcoal1, The activated charcoal may enhance the adsorption performance through the modification, and the analyzing question can be solved.2, Increasing modified activated charcoal may enhance the disposaling rate of the indoor HCHO, but the effection is small. The saturated adsorption time is 2-4h.3, In this research, the best modified condition is: The time that the activated charcoal soak in the solution is 1h; The activated charcoal drying time after modified is 2-4h.