Document Type : Research Paper


1 Assoc. Professor, Department of Environment, Faculty of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran

2 M.Sc., Department of Environment, Faculty of Fisheries and Environment, Environmental Pollution. Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran


In recent years, various methods have been used to remove heavy metals from aquatic environments; one of which is the adsorption process. Graphene oxide nanoparticles have received much attention due to their high adsorption capacity and high surface area. In this study, melamine-modified nanographene oxide adsorbent was used to remove Pb from aqueous solution. Experiments were performed at pH (3-8), temperature (15-50 °C), Pb concentration (5-200) mg/l, adsorbent (0.01-0.06 g), and contact time (15-150 min). Results showed that the maximum Pb adsorption efficiency by modified nanographene oxide occurred at pH = 6, concentration of 20 mg/l, contact time of 60 min, ambient temperature of 22 °C and adsorbent dosage of 0.01 g. In the study of metal equilibrium isotherms, the Freundlich model was more consistent with the experimental data. Given that the Freundlich model is used to describe heterogeneous adsorbent surfaces, it can be concluded that lead adsorption by graphene oxide nanoparticles has been done in several layers. Modified nanographene oxide with its large surface area, hydrophobicity, high negative charge density, ease of fabrication and high adsorption could be used as an effective adsorbent for metal removal. According to the results of this study, a melamine-modified nanographene oxide adsorbent with a high efficiency of 98.8% can be used to remove lead from aqueous solutions.


Main Subjects

Amini, M., Younesi, H. and Bahramifar, N. (2009). Statistical modeling and optimization of the cadmium biosorption process in an aqueous solution using Aspergillus niger. Colloid. Surf. A. Physicochem. Eng. Aspect., 337,67-73.
Amooghin, A. E., Mashhadikhan, S., Sanaeepur, H., Moghadassi, A., Matsuura, T. and Ramakrishna, S. (2019). Substantial breakthroughs on function-led design of advanced materials used in mixed matrix membranes (MMMs): A new horizon for efficient CO2 separation, Progress Mater. Sci., 102,222-295.
Asemaneh, H., Rajabi, L. and Dabirian, F. (2018). Removal of Pb(II) and Cd(II) from aqueous solutions using polyacrylonitrile/graphene oxide nanofibers. Fifth international conference on recent innovations in chemistry and chemical engineering [In Persian].
Barati, F., Benefactor, F. and benefit, F. (2017). Effect of initial concentration by adsorption method on the removal of lead using graphene adsorbent. Fourth national congress of biology and natural sciences of Iran, Tehran [In Persian].
Cao, Y., Huang, J., Guo, Z., Peng, X., Li, Y., Peng, F., Qiu, S., Liu, J., Khasanov, A., Khan, M. A., Young, D. P., Cao, D. and Hong, K. (2016). One-pot melamine derived nitrogen doped magnetic carbon nanoadsorbents with enhanced chromium removal. Carbon 109, 640-649.
Dreyer, D. R., Park, S., Bielawski, C. W. and Ruoff, R. S. (2010). The chemistry of graphene oxide. Chem. Soc. Rev., 39(1), 228-240.
Fan, L., Luo, C., Sun, M., Li, X. and Qiu, H. (2013). Highly selective adsorption of lead ions by water-dispersible magnetic chitosan/graphene oxide composites. Colloid. Surf. B. Bioenter., 103(1), 523-529. doi: 10.1016/j.colsurfb.2012.11.006
Gharebiglo, M., Izadkhah, M., Erfan Nia, H. and Entezami, P. (2016). Improved mechanical and thermal properties of modified graphene oxide nanocomposites. J. Modares Mech. Eng., 16(8), 196-206 [In Persian].
Ghorbani, F., Younesi, H., Ghasempouri, S. M., Zinatizadeh, A. A., Amini, M. and Daneshi, A. (2008). Application of response surface methodology for optimization of cadmium biosorption in an aqueous solution by Saccharomyces cerevisiae. J. Chem. Eng., 145(2), 267-275.
Rezaei, H. (2016). Biosorption of chromium by using Spirulina sp. Arab. J. Chem., 9(6), 846-853.
Iram, M., Guo, C., Guan, Y., Ishfaq, A. and Liu, H. (2010). Adsorption and magnetic removal of neutral red dye from aqueous solution using Fe3O4 hollow nanospheres. J. Hazard. Mater., 181(1-3), 1039-1050.
Jamali, H., Dindarloo, K., and Nikpey, A. (2015). Optimization of metal working fluids treatment using ferric chloride by application of response surface methodology (RSM). J. Prev. Med., 2(1), 10-20 [In Persian].
Li, X-M., Zheng, W., Wang, D. B., Yang, Q., Cao, J. B. and Yue, X. (2010). Removal of Pb(II) from aqueous solutions by adsorption onto modified areca waste: Kinetic and thermodynamic studies. Desal., 258(1-3), 148-153.
Machida, M., Kikuchi, Y., Aikawa, M. and Tatsumoto, H. (2004). Kinetics of adsorption and desorption of Pb(II) in aqueous solution on activated carbon by two-site adsorption model. Colloid. Surf. A. Physicochem. Eng. Aspect., 240(1-3), 179-186
Mahvi, A. H. and Heibati, B. (2010). Removal efficiency of azo dyes from textile effluent using activated carbon made from walnut wood and determination of isotherms of acid red18. J. Health Hyg., 1(3), 7-15 [In Persian].
Momeni, M., Bahrebar, F. and Bahrebar, F. (2017). Effect of mixing time on the percentage of lead removal by adsorbent by adsorption method using graphene adsorbent. Fourth national congress [In Persian].
Naghizadeh, A. and Momeni F. (2015). Evaluation of the efficiency of graphene oxide nanoparticles in the removal of chromium and lead from aqueous solutions. Sci. J. Birjand Univ. Med. Sci., 22(1), 27-38 [In Persian].
Perreault, F., De Faria, A. F. and Elimelech, M. (2015). Environmental applications of graphene-based nanomaterials. Chem. Soc. Rev., 44(16), 5861-5896.
Rashidifard, M. and Amiri, M. (2019). Efficiency evaluation of the graphene oxide in adsorption of malathion toxin from aqueous media. Environ. Water Eng., 5(2), 137-147 [In Persian] doi: 10.22034/jewe.2019.157974.1294.
Rouniasi, N., Monavari, S., Abdoli, M., Baghdadi, M. and Karbasi, A. (2018). Removal of heavy metals of cadmium and lead from aqueous solutions using graphene oxide nanosheets process optimization by response surface methodology. Iran J. Health Environ., 11(2), 197-214 [In Persian].
Saghapour, Y., Aghaie, M., and Zare, K. (2013). Thermodynamic study of lead ion removal by adsorption onto nanographene sheets. J. Phys. Theor. Chem. 10(1), 59-67.
Seo, P. W., Khan, N. A., Hasan, Z. and Jhung, S. H. (2016). Adsorptive removal of artificial sweeteners from water using metal organic frameworks functionalized with urea or melamine. ACS Appl. Mater. Interfac. 8(43), 29799-29807-.
Shi, Z., Zou, P., Guo, M. and Yao, S. (2015). Adsorption equilibrium and kinetics of lead ion onto synthetic ferrihydrites. Iran. J. Chem. Chem. Eng., 34(3), 25- 32.
Shiomi, N. (2015). An assessment of the causes of lead pollution and the efficiency of bioremediation by plants and microorganisms. Advances in bioremediation of wastewater and polluted soil. doi: 10.5772/60802
Wang, X. S., Lu, Z. P., Miao, H. H., He, W. and Shen, H. L. (2011). Kinetics of Pb(II) adsorption on black carbon derived from wheat residue. .J. Chem. Eng., 166(3), 986-993.
Yin, N., Wang, K., Xia, Y. and Li, Z. (2018). Novel melamine modified metal-organic frameworks for remarkably high removal of heavy metal Pb(II). Desal., 430, 120-127.