Ali, S. A. K., Ibrahim, L. D. M., & Hussein MSc, H. A. (2018). Removal of Lead from Wastewater by Graphene Coated Sand Composite. International Journal of Sciences: Basic and Applied Research (IJSBAR), 37(1), 1–9. Retrieved from https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/8445