## 3 Results and Discussion  
### Physicochemical Data  
Wastewater samples were taken during the cold (C) and hot (H) seasons across three consecutive years (1, 2, 3). Air temperature and humidity in cold seasons varied between 10.0-25.0 \({}^{\circ}\)C and 41-71%, respectively, while in hot seasons ranged between 17.9-30.0 \({}^{\circ}\)C and 28-85%, respectively. Concerning inlet and outlet wastewater temperature, in cold seasons varied respectively between 10.5-17.2 \({}^{\circ}\)C and 10.0-15.0 \({}^{\circ}\)C. Concerning hot seasons, inlet and outlet wastewater temperature varied between 16.4-23.9 \({}^{\circ}\)C and 14.0-20.8 \({}^{\circ}\)C, respectively (Table S1--Supplementary Materials). The wastewater's physicochemical analysis, at the inlet and outlet of the CW, is detailed in Table 1. \begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Session/Year**} & \multicolumn{2}{c}{**pH**} & \multicolumn{2}{c}{**EC**} & \multicolumn{2}{c}{**COD**} & \multicolumn{2}{c}{**SOD**} & \multicolumn{2}{c}{**SOD**} & \multicolumn{2}{c}{**TSS**} \\ \cline{2-10}  & \multicolumn{2}{c}{**(μs/cm)**} & \multicolumn{2}{c}{**(μs/cm)**} & \multicolumn{2}{c}{**(m/s/L)**} & \multicolumn{2}{c}{**(m/s/L)**} & \multicolumn{2}{c}{**(m/s/L)**} & \multicolumn{2}{c}{**(m/s/L)**} \\ \cline{2-10}  & **Inlet** & **Outlet** & **Inlet** & **Outlet** & **Inlet** & **Outlet** & **Inlet** & **Outlet** & **Inlet** & **Outlet** \\ \hline C1 & 6.70 \(\pm\) 0.23 & 7.69 \(\pm\) 0.09 & 365 \(\pm\) 176 & 251 \(\pm\) 86 & 563 \(\pm\) 337 & 11 \(\pm\) 4 & 165 \(\pm\) 109 & 7 \(\pm\) 3 & 101 \(\pm\) 44 & 8 \(\pm\) 3 \\ H2 & 6.57 \(\pm\) 0.17 & 7.38 \(\pm\) 0.18 & 1027 \(\pm\) 414 & 706 \(\pm\) 104 & 691 \(\pm\) 203 & 20 \(\pm\) 5 & 281 \(\pm\) 47 & 10 \(\pm\) 1 & 287 \(\pm\) 115 & 14 \(\pm\) 3 \\ C2 & 7.41 \(\pm\) 0.12 & 7.33 \(\pm\) 0.03 & 1002 \(\pm\) 151 & 648 \(\pm\) 135 & 443 \(\pm\) 175 & 136 \(\pm\) 110 & 181 \(\pm\) 94 & 38 \(\pm\) 32 & 66 \(\pm\) 20 & 12 \(\pm\) 4 \\ H3 & 7.33 \(\pm\) 0.07 & 7.07 \(\pm\) 0.33 & 816 \(\pm\) 100 & 559 \(\pm\) 53 & 385 \(\pm\) 25 & 37 \(\pm\) 11 & 186 \(\pm\) 34 & 24 \(\pm\) 7 & 113 \(\pm\) 25 & 7 \(\pm\) 1 \\ C3 & 7.34 \(\pm\) 0.12 & 6.81 \(\pm\) 0.04 & 818 \(\pm\) 138 & 643 \(\pm\) 185 & 508 \(\pm\) 137 & 38 \(\pm\) 6 & 247 \(\pm\) 80 & 23 \(\pm\) 8 & 72 \(\pm\) 28 & 6 \(\pm\) 1 \\ \hline \multicolumn{10}{c}{**PO4-2**} & \multicolumn{2}{c}{**NH4-5**} & \multicolumn{2}{c}{**NO2-**} & \multicolumn{2}{c}{**NO3-**} \\ \cline{2-10}  & \multicolumn{2}{c}{**(mg/L)**} & \multicolumn{2}{c}{**(mg/L)**} & \multicolumn{2}{c}{**(mg/L)**} & \multicolumn{2}{c}{**(mg/L)**} & \multicolumn{2}{c}{**(mg/L)**} \\ \cline{2-10}  & **Inlet** & **Outlet** & **Inlet** & **Outlet** & **Inlet** & **Outlet** & **Inlet** & **Outlet** \\ \hline C1 & 26.15 \(\pm\) 2402 & 3.47 \(\pm\) 231 & 19.16 \(\pm\) 117.4 & \multirow{2}{*}{2} & \multirow{2}{*}{2.10 \(\pm\) 1.77} & \multirow{2}{*}{0.13 \(\pm\) 0.07} & \multirow{2}{*}{9.85 \(\pm\) 5.54} & \multirow{2}{*}{0.95 \(\pm\) 0.43} \\ H2 & 26.64 \(\pm\) 6.91 & 7.13 \(\pm\) 1.41 & 60.22 \(\pm\) 29.69 & 27.07 \(\pm\) 14.10 & 2.18 \(\pm\) 0.28 & 0.13 \(\pm\) 0.03 & 21.26 \(\pm\) 2.67 & 192 \(\pm\) 0.06 \\ C2 & 18.57 \(\pm\) 423 & 5.15 \(\pm\) 211 & 27.26 \(\pm\) 247.0 & 14.24 \(\pm\) 12.84 & 1.83 \(\pm\) 1.27 & 0.14 \(\pm\) 0.02 & 15.08 \(\pm\) 5.75 & 3.07 \(\pm\) 1.19 \\ H3 & 15.75 \(\pm\) 1.98 & 8.39 \(\pm\) 112 & 44.65 \(\pm\) 15.11 & 7.37 \(\pm\) 4.37 & 0.63 \(\pm\) 0.16 & 0.12 \(\pm\) 0.06 & 3.42 \(\pm\) 2.12 & 0.76 \(\pm\) 0.12 \\ C3 & 25.85 \(\pm\) 5.88 & 6.38 \(\pm\) 0.79 & 51.77 \(\pm\) 17.06 & 20.87 \(\pm\) 7.40 & 0.31 \(\pm\) 0.07 & 0.10 \(\pm\) 0.02 & 9.16 \(\pm\) 3.40 & 5.00 \(\pm\) 2.93 \\ \hline \hline \end{tabular} Note: EC electric conductivity; COD chemical oxygen demand; BOD biological oxygen demand; TSS; total suspended solids.  
\end{table} 
Table 1: Inlet and outlet composition of the wastewater from the constructed wetland during cold (C) and hot (H) seasons across three consecutive years (1, 2, 3).