The Langmuir and Freundlich isotherms at 25 C for raw, DAB and sulfuric acid pre-treated DAB are shown in Fig. 2. Both models provided good fit to data (Table 3).
The Langmuir and Freundlich isotherms at 25 C for raw, DABand sulfuric acid pre-treated DAB are shown in Fig. 2. Both modelsprovided good fit to data (Table 3).