TY - JOUR T1 - Removal of Cd2+ from aqueous solution by adsorption using Fe-montmorillonite. AU - Wu,Pingxiao, AU - Wu,Weimin, AU - Li,Shuzhen, AU - Xing,Ning, AU - Zhu,Nengwu, AU - Li,Ping, AU - Wu,Jinghua, AU - Yang,Chen, AU - Dang,Zhi, Y1 - 2009/04/14/ PY - 2008/11/18/received PY - 2009/04/03/revised PY - 2009/04/07/accepted PY - 2009/5/16/entrez PY - 2009/5/16/pubmed PY - 2009/9/29/medline SP - 824 EP - 30 JF - Journal of hazardous materials JO - J Hazard Mater VL - 169 IS - 1-3 N2 - Fe-montmorillonite (Fe-Mont.) is obtained by exchanging the original interlayer cations of montmorillonite by poly-hydroxyl ferric. In this paper, Fe-Mont. was synthesized by using Ca-montmorillonite (Ca-Mont.) directly under ultrasonic treatment with the aim to enhance the ability of removal of heavy metal ions from wastewater. The modified materials were characterized by X-ray diffraction (XRD) and Fourier transform infrared (FT-IR). Batch equilibrium experiments of Cd(II) ions (Cd(2+)) adsorption on the Fe-Mont. were performed. Effects of the initial pH of the solution and contact time on the adsorption of Cd(2+) were studied. Four types of adsorption isotherms were applied to describe the adsorption isotherms of Cd(2+) by Fe-Mont. The relationship between adsorbing capacity (q(e)) and equilibrium mass concentration (C(e)) is in accordance with the isothermal adsorption equation of Langmuir. Three kinetic models, including pseudo-first-order, pseudo-second-order and the Elovich equation model, were used to analyze the Cd(2+) adsorption process. The pseudo-second-order chemical reaction kinetics provide the best correlation of the experimental data, therefore the adsorption dynamics follows the laws of pseudo-second-order kinetics. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/19443105/Removal_of_Cd2+_from_aqueous_solution_by_adsorption_using_Fe_montmorillonite_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(09)00592-5 DB - PRIME DP - Unbound Medicine ER -