Abstract:

The indoor air pollution in urban resident is very serious, formaldehyde has become one of the most important indoor air pollutants in China. In this study, ivy (Scinda Psusaureu), green dill (Hedera nepalensis van. Sinensis) and activated carbon are selected as the research objects, and we use the closed chamber technique to study the absorption capacity of plants and chemicals on formaldehyde. The results show that green dill, ivy and activated carbon are all good for indoor formaldehyde purification. One day later, the purifying efficiency decreased in the order as follows: ivy + activated carbon（formaldehyde cleaning rate is 38.27%）> ivy (34.31%) > green dill + activated carbon (32.20%) > green dill (5.61%) > activated carbon (3.73%). Ten days later, the purifying efficiency decreased in the order as follows: ivy + activated carbon (69.91%) > green dill+ activated carbon (64.28%) > ivy (60.44%) > activated carbon (57.50%)> green dill (24.99%). Combining the plants and activated carbon have the better efficiency of formaldehyde cleaning rate than using plants or activated carbon singly, and long time have better effect than short time.