Parameters Adsorbed Naphthalene concentration on orange peels Residual concentrations in liquid phase (SAB) Calculated naphthalene biodegraded (SAB)
Initial Concentration (mg/l)      10
                                              20
                                              30
                                              40
                                              50 pH                                          5
                                               7
                                               9     
6.58
12.95
18.90
24.50
20.25 14.18
18.90
16.06
0.6
1.48
3.00
5.00
7.50 9.75
3.00
7.05
2.82
5.57
8.10
10.50
12.75 6.07
8.10
6.89
Table 1: Simultaneous adsorption and biodegradation treatment of naphthalene aqueous solutions.