Original Articles
V Krishna Veni and J Venkatesw
Abstract
A low cost biosorbent has been synthesized from the stems of “Tarenna asiatica” (NTAC) for the removal of chromium (VI) from contaminated waters by using batch adsorption method. Factors effecting the removal of chromium by the sorbent from chromium solution have been studied. Different adsorption isotherms have been applied to study the adsorption mechanism and the adsorption is physisorption. To study the rate and kinetics of adsorption some kinetic models have been applied. The correlation coefficient values indicate that the adsorption process can be fitted into Pseudo second order model. SEM, EDX techniques of the active carbon have shown a morphological change of the surface after adsorption and FTIR studies indicate the involvement of some surface functional groups in chromium (VI) adsorption. XPS analysis was studied to investigate the chemical compaction of surfaces of adsorbent. The effect of interfering ions has also been studied.