Adsorptive removal of Cr(VI) ions from aqueous solutions by H2SO4 modified oak (Quercus L.) sawdust

Authors : Duygu ÖZDEŞ, İbrahim YILDIRIM, Celal DURAN

Pages : 7-14

View : 23 | Download : 9

Publication Date : 2020-06-23

Article Type : Research Paper

Abstract :In this study, the utilization of H2SO4 modified oak sawdust insert ignore into journalissuearticles values(Quercus L.); insert ignore into journalissuearticles values(HMOS); as a new and promising sorbent for the uptake of an extremely toxic inorganic pollutant, Crinsert ignore into journalissuearticles values(VI); ions, from aqueous media by batch adsorption method has been investigated. The HMOS has been characterized by different methods such as Boehm titration, pHpzc and moisture content. Some of the process parameters including initial solution pH, equilibrium time, initial Crinsert ignore into journalissuearticles values(VI); concentration, HMOS amount, and salt effect were examined in detail in order to optimize the experimental conditions for the uptake of Crinsert ignore into journalissuearticles values(VI); ions onto HMOS. The maximum Crinsert ignore into journalissuearticles values(VI); uptake was achieved at initial solution pH of 2.5 and at equilibrium time of 240 min. The adsorption behaviors of Crinsert ignore into journalissuearticles values(VI); ions onto both natural oak sawdust insert ignore into journalissuearticles values(NOS); and HMOS were analyzed in terms of Langmuir and Freundlich isotherm models and the Crinsert ignore into journalissuearticles values(VI); adsorption was obtained to be compatible with both isotherm models. The Crinsert ignore into journalissuearticles values(VI); uptake capacities of NOS and HMOS were calculated as 48.07 and 100.0 mg g-1, respectively by utilizing the Langmuir model. As a result, H2SO4 modified oak sawdust provides a versatile alternative to remove Crinsert ignore into journalissuearticles values(VI); ions from wastewaters.
Keywords : Adsorption, Chromium, Heavy metal