1. Amin, M.T., Alazba, A.A., & Manzoor, U. (2014). A review of removal of pollutants from water/wastewater using different types of nanomaterials, Adv. Mater.Sci. Eng., 1–24.DOI: http://dx.doi.org/10.1155/2014/825910.10.1155/2014/825910
2. Singh, S., Barick, K.C., & Bahadur, D. (2013). Functional oxide nanomaterials and nanocomposites for the removal of heavy metals and dyes. Nanomater. Nanotechnol, 3(20). DOI 10.5772/57237.10.5772/57237
4. Zolfaghari, G., Esmaili-Sari, A., Anbia, M., Younesi, H., Ghasemian, M.B. (2013). A zinc oxide-coated nanoporous carbon adsorbent for lead removal from water: optimization, equilibrium modeling, and kinetics studies. Int. J. Environ. Sci. Technol., 10, 325–340. DOI: 10.1007/s13762-012-0135-6.10.1007/s13762-012-0135-6
5. Srivastava, S., & Srivastav, Y. (2013). Removal of arsenic from waste water by using ZnO nano-materials. J.Mater. Sci.Eng. B, 3(8), 483–492.10.17265/2161-6221/2013.08.001
6. Khan, S.B., Rahman, M.M., Marwani, H.M., Asiri A.M., & Alamry, K.A. (2013). An assessment of zinc oxide nanosheets as a selective adsorbent for cadmium. Nanosc. Res. Lett. 8, 377. DOI: 10.1186/1556-276X-8-377.10.1186/1556-276X-8-377384873324011201
9. Erdem, M., Ucar, S. Karagöz, S., & Tay, T. (2013). Removal of Lead (II) Ions from Aqueous Solutions onto Activated Carbon Derived from Waste Biomass. Sci.World. J., 7. DOI: http://dx.doi.org/10.1155/2013/146092.10.1155/2013/146092370372323853528
10. Xianbiao, W., Weiping, C., Shengwen, L., Guozhong, W., Zhikun, W., & Huijun Z. (2013). ZnO hollow microspheres with exposed porous nanosheets surface: Structurally enhanced adsorption towards heavy metal ions. Colloids and Surfaces A: Physicochem. Eng. Aspects, 422, 199–205. DOI:http://dx.doi.org/10.1016/j.colsurfa.2013.01.031.10.1016/j.colsurfa.2013.01.031
11. Wang, X., Guo, Y., Yang, L., Han, M., & Zhao, J. (2012). Nanomaterials as sorbents to remove heavy metal ions in wastewater treatment. J. Environ. Anal. Toxicol. 2(7), 154. DOI:10.4172/2161-0525.1000154.10.4172/2161-0525.1000154
12. Yeong, H.K., Dandu, K.V.R., and Jae, S.Y. (2013). Electrochemical synthesis of ZnO branched submicrorods on carbon fibers and their feasibility for environmental applications. Nanoscale Research Letters, 8, 262.
13. Krasovska, M., Gerbreders, V., Paskevics, V. Ogurcovs, A., & Mihailova, I. (2015). Obtaining a well-aligned ZnO nanotube array using the hydrothermal growth method. Latvian J. Phys.Techn.Sci. 5(52), 28–40. DOI: 10.1515/lpts-2015-0026.10.1515/lpts-2015-0026
15. Roza, L., Rahman, M.Y.A., Umar, A.A., & Salleh, M.M. (2015). Direct growth of oriented ZnO nanotubes by self-selective etching at lower temperature for photo-electro-chemical (PEC) solar cell application. J. All.Comp., 618, 153–158. DOI:10.1016/j.jallcom.2014.08.113.10.1016/j.jallcom.2014.08.113
19. Alfind, A., Frit, P., Deepalakshmi, K., Prithivikumaran, N., & Jeyakumaran, N. (2014). The effect of annealing time on lead oxide thin films coated on indium tin oxide substrate. Int. J. ChemTech Res., 6(13), 5347–5352.