B P International

Biosorption of Cadmium (Cd (II)) and Arsenic (As (III)) ions from aqueous solution by tea waste biomass was examined in a batch experimental setup. The effects of pH and temperature on the biosorption were studied in this work. The optimum pH values for the maximum efficiency of biosorption of Cd (II) and As (III) ions were found to be 5.5 and 7.5, respectively. The adsorption process was endothermic in nature and spontaneous. Further, about 95% and 84.5% removal of Cd (II) and As (III) ions was obtained at 200 mg/l of adsorbate and 6 g/l and 7 g/l of adsorbent dosage, respectively. The present study showed that tea waste biomass can serve as a good and cheap substitute for conventional carbon based adsorbents for removal of metal ions from industrial wastewater. Author(s) Details Dr. Suantak Kamsonlian Department of Chemical Engineering, Motilal Nehru National Institute of Technology Allahabad, Prayagraj – 211004, India. Dr. Chandrajit Balomajumder Department of Chemi...

Many studies were undertaken on the biosorption potential of different kinds of biomaterials. However, there is a paucity of data regarding the biosorption mechanism of Cr (VI) using dried cells. In our study, the removal of Cr (VI) from aqueous solution was investigated in a batch system by the dried biomass of Bacillus cereus Pf-1 isolated from activated sludge samples. Equilibrium and kinetic experiments were undertaken at various initial metal concentration, pH, and biosorbent dosage. Energy-Dispersive X-ray (EDX), Scanning Electron Microscope (SEM) and Fourier Transform Infrared Spectroscopy (FTIR) were used to characterize the biomass. Biosorption process was found to be pH dependent. The optimum pH was found to be 2.0. The Langmuir and Freundlich were considered to identify the isotherm that could better describe the equilibrium adsorption of Cr (VI) onto the biomass. Langmuir and Freundlich models fitted our experimental data. The suitability of the pseudo-first order and pse...