Removal of Cu2+ and Ni2+ from Wastewater by Using Modified Alkali-Leaching Residual Wire Sludge as Low-Cost Adsorbent
- 92 Downloads
Alkali-leaching residual wire sludge (AWRS) is an abundant by-product in the harmless disposal process of wire rope sludge. In this study, we modified AWRS through thermal treatment to produce a low-cost and highly efficient adsorbent for the removal of Cu2+ and Ni2+ from wastewater. The results indicated that AWRS calcinated at 700 °C exhibited maximum Cu2+ and Ni2+ removal capacities (36.48 mg/g and 46.58 mg/g, respectively). The adsorption process was observed to follow the Elovich kinetic model and the Langmuir–Freundlich isotherm model. The sorption of Cu2+ and Ni2+ on AWRS700 was highly pH dependent and behaved optimally at the solution pH values of 6 and 5, respectively. Column studies and physicochemical analyses (XRD, SEM-EDS, and XPS) indicated that the sorption of Cu2+ and Ni2+ on AWRS700 was mainly governed by the chemisorption mechanism, and this was attributed to active metal oxides (Fe2O3, CaO, and Al2O3) in AWRS700. Specifically, Cu2+ is mainly adsorbed on AWRS700 in the form of Cu(OH)2, CuO2, and CuFeO2, and Ni2+ is mainly adsorbed in the form of NiAlO4, Ni2O3, and Ni(OH)2. Given the low-cost and high adsorption efficiency of AWRS700, the developed AWRS700 is a promising adsorbent for Cu2+ and Ni2+ removal from wastewater.
KeywordsAlkali leaching wire sludge (AWRS) Calcination treatment Adsorption Copper and nickel Low-cost adsorbent
The study was jointly supported by the National Natural Science Foundation of China (Grant No. 41601538, 51778265), the State’s Major Water Pollution Control and Management Project (Grant No. 2017ZX07202006, 2017ZX07203004), and the Foundation Research Project of Jiangsu Province (No. BK20161100).
- Fang, B. B., Chu, Z., Yang, Y., Sun, X. Y., Huang, W. P., Li, X. F., & Wang, L. J. (2013). Characterization of stainless steel and wire rope pickling sludge. Advanced Materials Research. Trans Tech Publications, 726, 2130–2134.Google Scholar
- González-Muñoz, M. J., Rodríguez, M. A., Luque, S., Álvarez, J. R. (2006). Recovery of heavy metals from metal industry waste waters by chemical precipitation and nanofiltration. Desalination, 200, 742–744. Google Scholar
- Rao, S. R. (2011). Resource recovery and recycling from metallurgical wastes (Vol. 7). Amsterdam: Elsevier.Google Scholar
- Thanh, D. N., Novák, P., Vejpravova, J., Vu, H. N., Lederer, J., & Munshi, T. (2018). Removal of copper and nickel from water using nanocomposite of magnetic hydroxyapatite nanorods. Journal of magnetism and magnetic materials, 2017. Journal of Magnetism and Magnetic Materials., 456(15), 451–460.CrossRefGoogle Scholar
- Zhao, Y. C., & Stanforth, R. (2000). Integrated hydrometallurgical process for production of zinc from electric arc furnace dust in alkaline medium. Journal of Hazardous Materials, 80(1), 223–240.Google Scholar