ADSORPTION ABILITY OF AIR POLLUTANTS BY INDIGENOUS TREE SPECIES IN TA-PIEH MOUNTAINS

摘要

To enhance the ability of indigenous tree species in Ta-pieh Mountains to decontaminate toxic gases, Euonymus japonicus, Salix babylonica and Morus alba are surveyed by means of fumigation experiments for sensitivity to SO_2 and HF. Response surface methodology is applied to adsorption and purgation ability of indigenous tree species on SO_2 and HF. The results show that trees can absorb and accumulate the contaminants in the atmosphere through the leaves, and the amount of adsorption and accumulation is large. The tree species have adsorption and purgation ability to air pollutants, and have differences according to the type of pollutant gas. After treating them in fumigation chamber, the weakest one, Morus alba, contains 9.5 mg/kg of sulfur while the strongest one, Euonymus japonicus, contains 478.9 mg/kg. The weakest one, Salix babylonica, contains 6.9 mg/kg of fluorine while the strongest one, Euony- mus japonicus, contains 401.5 mg/kg.