Table 4 Decolorization of Remazol black B, COD reduction percent and phytotoxicity assessment using after biological and photocatalytic treatment at different dye concentrations
Dye concentration | Decolorization | COD reduction (%) | Phytotoxicity (the inhibition in the growth of the stem of lepidium sativum), % | ||
|---|---|---|---|---|---|
Biological treatment (%) | Photocatalytic treatment (%) | ||||
200 mg L−1 | 92.8 | 100 | 83.2 | 0 | |
500 mg L−1 | |||||
24 h | 75.3 | 100 | 66.4 | 7.6 | |
48 h | 100 | ||||