Abstract
A novel biosorbent from agricultural waste with an exceptional adsorptive capacity was prepared from the seed of blackberry (scientific name: Syzium Cumini).
Methods: The biochar prepared from the waste seed by pyrolysis method had been characterized after chemical activation by different characterization techniques. (SEM, BET, TGA, FTIR, Proximate and ultimate analysis) to determine its physicochemical properties The adsorption study was carried out to inculcate the behaviour of the adsorption of Safranine-O dye from wastewater using prepared biosorbent.
Results and Conclusion: The removal of adsorbate was best achieved by maintaining the following operational parameters: pH 6.3, dose of lab made biosorbent 1.26 g/L, initial concentration of Safranin-O-25 ppm, optimum contact time 120 minutes. The equilibrium data of Safranine-O (adsorbate) were analyzed in terms of different adsorption isotherm study. The isotherm data were fit to the Langmuir, Freundlich and Temkin isotherm model. It was best fit to Langmuir isotherm. The adsorption kinetics was well described by the pseudosecond- order kinetic model. The results of the adsorption experiments showed that for ABCSafranine- O system (Activated Blackberry Carbon-Safranin-O), the maximum uptake capacity of the adsorbent was found in the acidic medium.
Keywords: Adsorption, isotherm, safranine-O, activated blackberry seeds, jamun, langmuir isotherm.
Graphical Abstract
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