No abstract

The article studies on the effects of six inorganic ions (Ca 2+ , Mg 2+ , Cl -, , H 2 , and ) on titanium dioxide (TiO 2 )-based photocatalytic degradation of humic acid (HA). We focus on the effects of the inorganic ions on HA characters, adsorption of HA on TiO 2 and photocatalytic degradation of HA. The results indicate that Ca 2+ and Mg 2+ with HA can form complexes which can decrease the solubility of HA, and then increase the HA adsorbed on TiO 2 . However, the complex is more difficult to be degraded than HA. The effects of Cl -and are closely related to their influences on HA solubility. The solubility changes of HA to some extent can enhance the adsorption of HA on TiO 2 , and promote the photocatalytic degradation. Nevertheless, great solubility decreasing of HA can weaken the photocatalytic degradation.and H 2 can inhibit the photocatalytic degradation process seriously, because and H 2 are the strong scavengers of hydroxyl radicals, and can weaken the adsorption of HA on TiO 2 due to adsorption competition.

No abstract

No abstract

No abstract