Research on application of modified activated carbon in adsorbing indoor formaldehyde

The activated carbon adsorption is an effective,cheap and easy way to treat indoor formaldehyde gas except desorption after adsorbing saturation.Desorption problem can be resolved by modifying the activated carbon.Results show that:(1)the saturated adsorption time of activated carbon to the formaldehyde gas is about 5 hours,but the desorption is along with the adsorption;(2)reducing the activated carbon particle to a proper size,the adsorption capacity could be increased,and the saturated and the desorption time could be postponed possibly;(3)the amount of the activated carbon used in per unit volume was about 8 g/m 3;(4)modified activated carbon could increase the adsorption capacity without desorption under the experimental conditions;(5) the saturated adsorption time of the modified activated carbon was 2-4 hours;(6) the amount of the modified activated carbon used in per unit volume was about 3 g/m 3.