# Photo-Transformation of Effluent Organic Matter by ZnO-Based Sunlight Irradiation
## 3 Results and Discussion
### DOC and Optical Parameters
#### 3.1.1 Characterization of the DOM, EfOM, and EfOM-Impacted
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multicolumn{1}{c}{**Parameters**} & \multicolumn{1}{c}{\begin{tabular}{c} **100/0** \\ **(Upstream)** \\ \end{tabular} } & \multicolumn{1}{c}{**75/25**} & \multicolumn{1}{c}{**50/50**} & \multicolumn{1}{c}{**25/75**} & \multicolumn{1}{c}{\begin{tabular}{c} **0/100** \\ **(WW Effluent)** \\ \end{tabular} } & \multicolumn{1}{c}{**Downstream**} \\ \hline \hline \multirow{2}{*}{\begin{tabular}{c} DOC \\ (mg/L) \\ \end{tabular} } & Initial & \(6.51\pm 0.03\) & \(7.05\pm 0.07\) & \(7.62\pm 0.03\) & \(7.79\pm 0.06\) & \(8.54\pm 0.01\) & \(8.04\pm 0.07\) \\ \cline{2-7}  & Photocatalysis & \(3.68\pm 0.03\) & \(4.34\pm 0.03\) & \(4.89\pm 0.05\) & \(5.21\pm 0.02\) & \(6.08\pm 0.06\) & \(4.90\pm 0.05\) \\ \hline \multirow{2}{*}{\begin{tabular}{c} UV\({}_{254}\) \\ (A.U.) \\ \end{tabular} } & Initial & \(0.073\) & \(0.079\) & \(0.089\pm 0.001\) & \(0.092\) & \(0.103\pm 0.001\) & \(0.099\) \\ \cline{2-7}  & Photocatalysis & \(0.024\) & \(0.027\) & \(0.031\) & \(0.035\) & \(0.041\pm 0.001\) & \(0.036\pm 0.001\) \\ \hline \multirow{2}{*}{\begin{tabular}{c} SUVA\({}_{254}\) \\ (L mg\({}^{-1}\) m\({}^{-1}\)) \\ \end{tabular} } & Initial & \(1.124\pm 0.008\) & \(1.116\pm 0.080\) & \(1.163\pm 0.020\) & \(1.177\pm 0.012\) & \(1.205\pm 0.018\) & \(1.234\pm 0.013\) \\ \cline{2-7}  & Photocatalysis & \(0.643\pm 0.011\) & \(0.627\pm 0.009\) & \(0.647\) & \(0.671\pm 0.006\) & \(0.677\pm 0.012\) & \(0.740\pm 0.029\) \\ \hline \multirow{2}{*}{E2/E3} & Initial & \(7.06\pm 1.17\) & \(7.60\pm 0.01\) & \(7.57\pm 1.24\) & \(6.86\pm 0.57\) & \(6.42\pm 0.72\) & \(7.12\pm 0.06\) \\ \cline{2-7}  & Photocatalysis & \(28.96\pm 1.30\) & \(23.30\pm 1.02\) & \(26.19\pm 1.99\) & \(24.45\pm 2.54\) & \(21.50\pm 1.13\) & \(35.08\pm 1.18\) \\ \hline \multirow{2}{*}{\begin{tabular}{c} \(t_{280}\) \\ (L mg\({}^{-1}\) m\({}^{-1}\)) \\ \end{tabular} } & Initial & \(21.25\) & \(20.42\) & \(20.99\) & \(22.57\) & \(22.87\) & \(23.16\) \\ \cline{2-7}  & Photocatalysis & \(7.92\pm 0.27\) & \(7.45\pm 0.56\) & \(7.87\pm 0.08\) & \(8.16\pm 0.29\) & \(8.27\pm 1.06\) & \(7.92\pm 0.45\) \\ \hline \multirow{2}{*}{\begin{tabular}{c} S\({}_{275-296}\) \\ (nm\({}^{-1}\)) \\ \end{tabular} } & Initial & \(-0.017\pm 0.002\) & \(-0.016\) & \(-0.016\pm 0.003\) & \(-0.014\pm 0.002\) & \(-0.013\pm 0.001\) & \(-0.014\) \\ \cline{2-7}  & Photocatalysis & \(-0.025\pm 0.005\) & \(-0.019\) & \(-0.018\pm 0.001\) & \(-0.016\) & \(-0.020\pm 0.002\) & \(-0.025\pm 0.005\) \\ \hline \multirow{2}{*}{\
\begin{tabular}{c} S\({}_{50-400}\) \\ (nm\({}^{-1}\)) \\ \end{tabular} } & Initial & \(-0.016\pm 0.002\) & \(-0.019\) & \(-0.017\pm 0.002\) & \(-0.018\) & \(-0.017\) & \(-0.018\) \\ \cline{2-7}  & Photocatalysis & \(-0.024\pm 0.003\) & \(-0.021\pm 0.001\) & \(-0.030\pm 0.003\) & \(-0.023\pm 0.001\) & \(-0.022\pm 0.005\) & \(-0.024\pm 0.003\) \\ \hline \multirow{2}{*}{
\begin{tabular}{c} S\({}_{8}\) \\ \end{tabular} } & Initial & \(1.022\pm 0.012\) & \(0.872\pm 0.002\) & \(0.909\pm 0.121\) & \(0.768\pm 0.111\) & \(0.744\pm 0.027\) & \(0.783\pm 0.010\) \\ \cline{2-7}  & Photocatalysis & \(1.051\pm 0.091\) & \(0.905\pm 0.045\) & \(0.620\pm 0.070\) & \(0.706\pm 0.012\) & \(0.952\pm 0.263\) & \(1.051\pm 0.091\) \\ \hline \multirow{2}{*}{FI} & Initial & \(1.26\pm 0.03\) & \(1.31\pm 0.01\) & \(1.45\pm 0.05\) & \(1.49\pm 0.07\) & \(1.66\pm 0.04\) & \(1.50\pm 0.01\) \\ \cline{2-7}  & Photocatalysis & \(0.33\pm 0.01\) & \(0.37\) & \(0.50\) & \(0.66\pm 0.05\) & \(0.87\pm 0.03\) & \(0.51\pm 0.01\) \\ \hline \multirow{2}{*}{HIX} & Initial & \(1.01\) & \(1.14\) & \(1.19\) & \(1.37\) & \(1.54\) & \(1.18\) \\ \cline{2-7}  & Photocatalysis & \(0.150\) & \(0.16\) & \(0.18\) & \(0.20\) & \(0.22\pm 0.01\) & \(0.20\) \\ \hline \multirow{2}{*}{BIX} & Initial & \(0.96\) & \(0.97\) & \(0.99\) & \(1.01\) & \(1.04\) & \(1.00\) \\ \cline{2-7}  & Photocatalysis & \(0.03\) & \(0.27\) & \(0.37\) & \(0.41\) & \(0.52\) & \(0.31\) \\ \hline \end{tabular}
\end{table}