| Title |
Transformation of Humic Acids to BDOC using Ozonation (1) |
| Authors |
민왕기 ; 고영송 ; 남상호 ( Wang Gi Min ; Young Song Ko ; Sang Ho Nam ) |
| Abstract |
This study is to investigate the characteristics of changes in Humic acid before and after ozonation. The results were compared with such terms as COD_(Cr),(K₂Cr₂O_7), COD_(Mn)(KMnO₄), UV_(254)(Ultra-violet absorbance, λ 254), BDOC and yield coefficient after ozonation of Humic acid were determined by the means of Heterotrophic plate count(HPC) method and Total Organic Carbon(TOC) analyzer. The percentage of BDOC in DOC of Humic acid before the ozonatiott was 4%, which was relatively low. The yield coefficient of HPC per Humic acid was 3.8 × 10^7 CFU/㎎ which is equivalent to 2.3 × 10^9 CFU/㎎ of BDOC. UV_(254) was more sensitively decreased than CUD_(Cr) and COD_(Mn). From this fact, it was inferred that the characteristics of Humic acid was changed by the different levels of ozone oxidation. As a result of ozonation. BDOC was increased. But at the maximum BDOC level, the concentration of ozone per ㎎ DOC was l㎎ to 1.5㎎ and 1.9㎎ at a ozone concentration of 2㎎/ℓ in the solution. The yield coefficient of BDOC was also increased. |