| Title |
Correlation between TOC and Water Pollution Index in Major Streams of Gwangju |
| Authors |
양윤철 ( Yoon-cheol Yang ) ; 이대행 ( Dae-haeng Lee ) ; 이경석 ( Kyung-seog Lee ) ; 안상수 ( Sang-su An ) ; 송형명 ( Hyeong-myeong Song ) ; 이세행 ( Se-haeng Lee ) ; 윤상훈 ( Sang-hoon Yoon ) ; 김선정 ( Sun Jung Kim ) ; 전홍대 ( Hong-dae Jeon ) ; 조영관 ( Young-gwan Cho ) ; 서광엽 ( Gwan |
| DOI |
https://doi.org/10.15681/KSWE.2017.33.2.203 |
| Keywords |
CODMn; Correlation Coefficient; Oxidation Rate; TOC; Water Pollution Index |
| Abstract |
This study was performed to verify the replacement of COD with TOC, which is more accurate and reliable in analysis, as the water quality pollution index, and to investigate the characteristics of water quality and the correlations among organic matter, suspended solids and nutrient materials from 2012 to 2015. The oxidation rates were compared by calculating the values of BOD-C/TOC and COD-C/TOC. The average value of TOC was 3.4 mg/L (range, 1.1 - 8.0 mg/L) at 14 sites during the period. The ratios of BOD-C/TOC and COD-C/TOC, that indicate the resolvability amounts among all carbon materials, were 28.8% and 62.7%, respectively. The correlation coefficient of TOC to COD at all sites was 0.718 (p<0.01), the highest value on comparing all items. The correlation coefficient of TOC to COD in the Gwangju stream was 0.753 (p<0.01), which was the highest compared to the values in other rivers. The correlation coefficient of TOC to COD was 0.757 (p<0.01) at all sites in the range of TP-III (0.1≤TP), and the correlation coefficient value was 0.762 (p<0.01) in the range of TN-II (2.0≤TP<3.0). As a result, TOC can be used as a water pollution index of organic matter instead of COD. |