| Characteristics |
TWW |
TW |
Tunisian regulation |
| pH |
7.60 ± 0.10 |
7.51 ± 0.11 |
6.50-8.50 |
| EC |
5.6 ± 0.02 |
4.30 ± 0.03 |
7 |
| TDS |
1.77 ± 0.02 |
0.93 ± 0.01 |
2 |
| HCO3ˉ |
356.00 ± 0.3 |
223.30 ± 0.20 |
600 |
| SO42ˉ |
354.00 ± 0.7 |
67.50 ± 1.5 |
1000 |
| N total |
53.80 ± 1.20 |
- |
30 |
| N-NO3ˉ |
13.40 ± 0.01 |
0.97 ± 0.01 |
- |
| N-NO4+ |
35.6 ± 0.01 |
2.67 ± 0.04 |
- |
| N-NO2ˉ |
4.00 ± 0.02 |
0.04 ± 0.01 |
- |
| P total |
9.44 ± 0.11 |
0.45 ± 0.02 |
0.05 |
| K+ |
33.80 ± 0.09 |
26.00 ± 0.05 |
50 |
| Na+ |
297 ± 0.01 |
430.00 ± 0.01 |
300 |
| Clˉ |
1767 ± 0.04 |
1340.00 ± 0.2 |
600 |
| Ca2+ |
98.50 ± 0.01 |
188.20 ± 0.02 |
- |
| Mg2+ |
85.70 ± 0.01 |
126.20 ± 0.03 |
- |
| Pb2+ |
<0.004 |
0 |
0.1 |
| Cd2+ |
<0.004 |
0 |
0.005 |
| Zn2+ |
0.33 ± 0.01 |
0.5 ± 0.01 |
5 |
| Mn2+ |
0.65 ± 0.01 |
0.13 ± 0.03 |
- |
| SM |
12.20 ± 0.02 |
2.30 ± 0.02 |
|
| COD |
74.00 ± 0.01 |
0 |
90 |
| BOD5 |
20.00 ± 0.01 |
0 |
30 |
| Total coliforms |
nd |
0 |
- |
| Fecal coliforms |
nd |
0 |
- |
|
| Data represents mean values ± standard deviation. EC: electrical conductivity (mS/
cm); TDS: total dissolved solids (g Lˉ1); SM: suspended matter (mg Lˉ1); COD (mg
Lˉ1): chemical oxygen demand; BOD5: biological oxygen demand (mg Lˉ1); Total
coliform and Fecal coliform (UFC/100 mL). anions, cations and total P and N are
measured in (mg Lˉ1); TW: tap water; TWW: treated wastewater; nd, Undetected. |
| Table 2: Chemical characteristics of the irrigation waters used in the experiment |
