The adsorption of Cd(II) ions on sulphuric acid-treated wheat bran

Journal of Hazardous Materials
A Ozer, H B Pirinççi

Abstract

The adsorption of Cd(II) ions which is one of the most important toxic metals by using sulphuric acid-treated wheat bran (STWB) was investigated. The effects of solution pH and temperature, contact time and initial Cd(II) concentration on the adsorption yield were studied. The equilibrium time for the adsorption process was determined as 4 h. The adsorbent used in this study gave the highest adsorption capacity at around pH 5.4. At this pH, adsorption capacity for an initial Cd(II) ions concentration of 100 mg/L was found to be 43.1 mg/g at 25 degrees C for contact time of 4 h. The equilibrium data were analysed using Langmuir and Freundlich isotherm models to calculate isotherm constants. The maximum adsorption capacity (qmax) which is a Langmuir constant decreased from 101.0 to 62.5 mg/g with increasing temperature from 25 to 70 degrees C. Langmuir isotherm data were evaluated to determine the thermodynamic parameters for the adsorption process. The enthalpy change (deltaH(o)) for the process was found to be exothermic. The free energy change (deltaG(o)) showed that the process was feasible. The kinetic results indicated that the adsorption process of Cd(II) ions by STWB followed first-order rate expression and adsorption rat...Continue Reading

References

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Citations

Sep 3, 2013·International Journal of Biological Macromolecules·T HajeethP N Sudha
Jan 27, 2012·Journal of Hazardous Materials·Zubair HasanSung Hwa Jhung
Oct 26, 2010·Journal of Hazardous Materials·Zhenze LiToru Inui
Aug 4, 2010·Journal of Hazardous Materials·Zhenze LiToru Inui
Jun 8, 2015·Environmental Monitoring and Assessment·Niveta JainNavindu Gupta
Mar 19, 2013·International Journal of Biological Macromolecules·M S SivakamiP N Sudha
Aug 11, 2018·International Journal of Phytoremediation·Emilia NeagAndrada Măicăneanu
Dec 18, 2015·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Meng XuGordon McKay
Dec 17, 2011·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Zeid A Al OthmanMohamed A Habila
Apr 8, 2016·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Manel AraissiYounes Moussaoui
Jan 17, 2017·Journal of Toxicology·Blessy Baby Mathew Krishnamurthy Nideghatta Beeregowda
Mar 7, 2019·Nanomaterials·Lisandra de Castro AlvesJosé Rivas
Mar 1, 2021·Environmental Science and Pollution Research International·Sourav MaityAngana Sarkar
Oct 24, 2007·Journal of Colloid and Interface Science·Alessia CoramiVincenzo Ferrini

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