## 3 Results and Discussion
### Phenanthrene Degradation Efficiency of the FTWs and CWs
The pH drop from alkalinity to acidity could be because of the formation of root exudates and the degradation of organic compounds to produce organic acids [22]. The decrease in the EC might be related to the reduction in the total suspended solid (TSS) and total dissolved solid (TDS) profiles as the EC is directly related to the TDS [8]. However, this study revealed that the CWs improved the water quality more efficiently than the FTWs under the same treatment conditions. Figure 7: Phenanthrene reduction in CWs and FTWs vegetated with _Phragmites australis_. \begin{table}
\begin{tabular}{c c c c c c c c c c c c c c c c c c} \hline \hline
**Time** & \multicolumn{2}{c}{**C1**} & \multicolumn{2}{c}{**C1**} & \multicolumn{2}{c}{**C1**} & \multicolumn{2}{c}{**C1**} & \multicolumn{2}{c}{**T1**} & \multicolumn{2}{c}{**T1**} & \multicolumn{2}{c}{**T1**} & \multicolumn{2}{c}{**T2**} & \multicolumn{2}{c}{**T2**} & \multicolumn{2}{c}{**T3**} & \multicolumn{2}{c}{**T3**} & \multicolumn{2}{c}{**T3**} \\ \cline{2-13}
**(Days)** & **pH** & **EC** & **pH** & **EC** & **pH** & **EC** & **pH** & **EC** & **pH** & **EC** & **pH** & **EC** & **pH** & **EC** & **pH** & **EC** & **pH** & **EC** \\ \hline
0 & 7.33 \(\pm\) 1.4 & 4.78 \(\pm\) 1.3 & 7.26 \(\pm\) 1.4 & 4.79 \(\pm\) 1.1 & 7.36 \(\pm\) 1.8 & 4.8 \(\pm\) 1.1 & 7.27 \(\pm\) 1.9 & 4.8 \(\pm\) 1.2 & 7.36 \(\pm\) 1.9 & 4.79 \(\pm\) 1.2 & 7.26 \(\pm\) 1.9 & 4.8 \(\pm\) 1.1 & 7.36 \(\pm\) 1.7 & 4.29 \(\pm\) 1.1 & 7.38 \(\pm\) 1.8 & 4.82 \(\pm\) 1.1 \\
10 & 7.32 \(\pm\) 1.9 & 4.77 \(\pm\) 1.1 & 7.27 \(\pm\) 1.9 & 4.79 \(\pm\) 1.1 & 7.23 \(\pm\) 2.3 & 4.75 \(\pm\) 1.1 & 7.23 \(\pm\) 1.7 & 4.79 \(\pm\) 1.1 & 7.21 \(\pm\) 1.9 & 4.05 \(\pm\) 1.22 & 7.22 \(\pm\) 1.9 & 4.79 \(\pm\) 1.2 & 7.37 \(\pm\) 2.1 & 4.46 \(\pm\) 1.1 & 7.18 \(\pm\) 1.9 & 4.78 \(\pm\) 0.9 \\ \hline
20 & 7.32 \(\pm\) 1.9 & 4.78 \(\pm\) 1.1 & 7.27 \(\pm\) 1.8 & 4.78 \(\pm\) 0.8 & 7.39 \(\pm\) 1.4 & 4.81 \(\pm\) 1.6 & 4.81 \(\pm\) 1.4 & 6.77 \(\pm\) 1.1 & 7.09 \(\pm\) 1.7 & 4.83 \(\pm\) 1.2 & 6.77 \(\pm\) 1.1 & 4.87 \(\pm\) 1.1 & 6.87 \(\pm\) 1.1 & 4.81 \(\pm\) 1.2 & 6.79 \(\pm\) 2.1 & 4.56 \(\pm\) 1.2 & 4.56 \(\pm\) 1.2 \\
30 & 7.31 \(\pm\) 1.9 & 4.77 \(\pm\) 1.1 & 7.28 \(\pm\) 1.7 & 4.78 \(\pm\) 1.1 & 6.09 \(\pm\) 1.7 & 4.46 \(\pm\) 0.6 & 6.92 \(\pm\) 1.5 & 4.74 \(\pm\) 0.8 & 6.87 \(\pm\) 0.9 & 4.48 \(\pm\) 1.2 & 6.77 \(\pm\) 1.9 & 4.48 \(\pm\) 1.1 & 6.62 \(\pm\) 1.4 & 4.06 \(\pm\) 6.9 & 7.82 \(\pm\) 2.1 & 4.57 \(\pm\) 0.6 \\
40 & 7.33 \(\pm\) 2.1 & 4.76 \(\pm\) 1.1 & 7.27 \(\pm\) 1.1 & 4.77 \(\pm\) 1.1 & 6.09 \(\pm\) 2.3 & 4.56 \(\pm\) 0.6 & 6.84 \(\pm\) 1.8 & 4.46 \(\pm\) 0.7 & 6.79 \(\pm\) 1.9 & 4.41 \(\pm\) 1.1 & 6.68 \(\pm\) 1.8 & 4.74 \(\pm\) 0.4 & 6.18 \(\pm\) 1.8 & 4.27 \(\pm\) 0.5 & 6.51 \(\pm\) 2.1 & 4.28 \(\pm\) 0.5 \\
50 & 7.34 \(\pm\) 1.8 & 4.75 \(\pm\) 1.1 & 7.29 \(\pm\) 1.4 & 4.75 \(\pm\) 1.2 & 6.88 \(\pm\) 2.1 & 4.29 \(\pm\) 1.1 & 6.81 \(\pm\) 1.8 & 4.58 \(\pm\) 0.8 & 6.88 \(\pm\) 1.8 & 4.34 \(\pm\) 0.6 & 6.65 \(\pm\) 1.8 & 4.99 \(\pm\) 1.1 & 6.09 \(\pm\) 1.8 & 3.57 \(\pm\) 0.5 & 6.29 \(\pm\) 2.1 & 4.17 \(\pm\) 0.6 \\
60 & 7.31 \(\pm\) 1.9 & 4.74 \(\pm\) 0.8 & 7.28 \(\pm\) 1.1 & 4.73 \(\pm\) 0.6 & 6.68 \(\pm\) 1.8 & 4.21 \(\pm\) 1.1 & 6.65 \(\pm\) 1.9 & 4.23 \(\pm\) 0.6 & 6.42 \(\pm\) 1.7 & 4.27 \(\pm\) 1.1 & 6.56 \(\pm\) 0.8 & 4.44 \(\pm\) 0.5 & 5.59 \(\pm\) 2.1 & 3.69 \(\pm\) 0.5 & 6.07 \(\pm\) 2.1 & 3.38 \(\pm\) 1.2 \\ \hline \multicolumn{13}{c}{C1: No Notions containing phenanthree-communinantal water without vegetation and the bacterial concentration, C2: microsons containing water without phenanthree and vegetation with \(D\) \(D\) _sandwich_ \(D\) _sandwich_ \(D\) _sandwich_ \(D\) _sandwich_ \(D\) _sandwich_ _D_sandwich_ \(D\) _sandwich_ _D