| Autor: |
Weshahy AR; Department of Chemistry, Faculty of Science, Zagazig University, Zagazig 44519, Egypt., Sakr AK; Department of Civil and Environmental Engineering, Wayne State University, 5050 Anthony Wayne Drive, Detroit, MI 48202, USA.; Nuclear Materials Authority, Cairo P.O. Box 530, Egypt., Gouda AA; Department of Chemistry, Faculty of Science, Zagazig University, Zagazig 44519, Egypt., Atia BM; Nuclear Materials Authority, Cairo P.O. Box 530, Egypt., Somaily HH; Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia.; Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia., Hanfi MY; Nuclear Materials Authority, Cairo P.O. Box 530, Egypt.; Institute of Physics and Technology, Ural Federal University, St. Mira, 19, 620002 Yekaterinburg, Russia., Sayyed MI; Department of Physics, Faculty of Science, Isra University, Amman 11622, Jordan., El Sheikh R; Department of Chemistry, Faculty of Science, Zagazig University, Zagazig 44519, Egypt., El-Sheikh EM; Nuclear Materials Authority, Cairo P.O. Box 530, Egypt., Radwan HA; Nuclear Materials Authority, Cairo P.O. Box 530, Egypt., Cheira MF; Nuclear Materials Authority, Cairo P.O. Box 530, Egypt., Gado MA; Nuclear Materials Authority, Cairo P.O. Box 530, Egypt. |
| Abstrakt: |
Spent Ni-Cd batteries are now considered an important source for many valuable metals. The recovery of cadmium, cobalt, and nickel from spent Ni-Cd Batteries has been performed in this study. The optimum leaching process was achieved using 20% H 2 SO 4 , solid/liquid (S/L) 1/5 at 80 °C for 6 h. The leaching efficiency of Fe, Cd, and Co was nearly 100%, whereas the leaching efficiency of Ni was 95%. The recovery of the concerned elements was attained using successive different separation techniques. Cd(II) ions were extracted by a solvent, namely, Adogen ® 464, and precipitated as CdS with 0.5% Na 2 S solution at pH of 1.25 and room temperature. The extraction process corresponded to pseudo-2nd-order. The prepared PTU-MS silica was applied for adsorption of Co(II) ions from aqueous solution, while the desorption process was performed using 0.3 M H 2 SO 4 . Cobalt was precipitated at pH 9.0 as Co(OH) 2 using NH 4 OH. The kinetic and thermodynamic parameters were also investigated. Nickel was directly precipitated at pH 8.25 using a 10% NaOH solution at ambient temperature. FTIR, SEM, and EDX confirm the structure of the products. |
