Abstract
The objective of this study was to develop a regeneration system for GAC and a solvent for use in TCE treatment. Thus, we evaluated the characteristic of TCE desorbed from GAC by acetic acid solution, the degradability of TCE in acetic acid solution by ozone, and the adsorption performance of TCE for GAC regenerated by acetic acid solution. The conclusions obtained from this study are as follows: The amount of TCE desorbed from GAC increased with increasing concentration of acetic acid. Almost all TCE was desorbed by more than 50% acetic acid solution. TCE in acetic acid solution was effectively decomposed by ozone. The specific amount of TCE decomposition in acetic acid solution in relation to ozone consumption was 4.0-48.0% higher than that in pure water. The adsorption capacity of the regenerated GAC was the same as that regenerated with new GAC. This result indicates that GAC regenerated by acetic acid solution can be recycled for TCE adsorption.
