Removal of Cu2+ from Wastewater Using Synthesized Magnetite Bentonite Nano-absorbent

Document Type : Technical Note


1 PhD Student of Mine Engineering, Sahand University of Technology, Tabriz

2 Ass. Prof. of Mine Engineering, Internatioanl University of Imam Khomeini, Qazvin

3 MSc Graduated of Mine Engineering, Internatioanl University of Imam Khomeini, Qazvin


The objective of the present study was to investigate absorption of copper from wastewater using the synthesized magnetite (Fe3O4) bentonite nanoadsorbent. Synthesized magnetite-bentonite nanoparticles (20‒40 nm) were produced using the coprecipitation method and subsequently subjected to Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), and Fourier Transform Infrared Spectroscopy (FT-IR) for analysis and evaluation. The nanoparticles were finally used as an adsorbent in wastewater treatment. Experiments were also designed using the Design of Experiment (DOE) software. Absorbent quantity, contact time, Cu+2 concentration , and pH were the most important factors selected for investigation. In a second step, the CCD design model was used to identify the optimum conditions for achieving the best metal ion absorption (removal) efficiency. It was found that 89% of Copper metal ions were absorbed under optimum conditions. Finally, experiments were performed on the inorganic effluent (from the Sarcheshme Copper Mines) under the optimum conditions. Results revealed a sorption content of 30% for Cu2+..


Main Subjects

1. Li-na Shi, Xin Zhang, and Zu-liang Chen (2011). “Removal of chromium (VI) from wastewater using bentonite-supported nanoscale zero-valent iron.” J. of Water Research, 45, 886-892.
2. Shahwan, T., Üzüm, Ç. A.E., and Eroğlu, I. (2010). “Lieberwirth synthesis and characterization of bentonite/iron nanoparticles and their application as adsorbent of cobalt ions.” Applied Clay Science, 47, 257-262.
3. Panneerselvam, P., Norhashimah, M., and Kah Aik, T. (2011). “Magnetic nanoparticle (Fe3O4) impregnated onto tea waste for the removal of nickel(II) from aqueous solution.” Materials, 186, 160-168.
4. Badruddoza, A. Z. M., and Uddin, M.S. (2011). “Carboxymethyl--cyclodextrin conjugated magnetic nanoparticles as nano-adsorbents for removal of copper ions: Synthesis and adsorption studies.” J. of Hazardous Materials, 185, 1177-1186.
5. Luiz, C.A., Rachel V.R.A., Riosa, D., Vijayendra, K., and Rochel, M. (2003). “Clay–iron oxide magnetic composites for the adsorption of contaminants in water.” Applied Clay Science, 22, 169-177.
6. Namdeo, M., and Bajpai, S.K. (2008). “Chitosan–magnetite nanocomposites (CMNs) as magnetic carrier particles for removal of Fe(III) from aqueous solutions.” Colloids and Surpaces, 320, 161-168.
7. Kusmiyati, K., Aishah, N., and Saidina, A. (2004). “Application of central composite design (CCD) and response surface methodology (RSM) in the catalytic conversion of methane and ethylene into liquid fuel products.” Fundamental Science Seminar, University of Tech., Malaysia.
8. Mardani, R., Ebrahimi Zarandi, J., and Kashesh, M. (2010). “Biological filtering investigation of sarcheshmeh mining acidic water on base discontinues reactor usage.” Science and Environmental Tech., 3, 35-44.
9. Karimpor, M.H. (2005). Geology of applied economy, Arsalan Pub., Mashhad University, Mashhad. (In Persian)