B. Estevinho, N. Ratola, A. Alves and L. Santosl, “Pen- tachlorophenol Removal from Aqueous Matrices by Sor- ption with Almond Shell Residues,” Journal of Hazard- ous Materials, Vol. 137, No. 2, 2006, pp. 1175-1181. doi:10.1016/j.jhazmat.2006.04.001
 H. G. Ibrahim and E. A. Abushina, “Investigation on the Removal of Chromium (III) from Tannery Wastewater by Cement Kiln Dust,” Journal of the Association of Arab Universities for Basic and Applied Sciences, Vol. 5, 2008, pp. 59-71.
 S. Rengaraj, M. Seuny-Hyeon and R. Sivabalan, “Agricultural Solid Waste for the Removal of Organics: Adsorption of Phenol from Water and Wastewater by Palm Seed Coat Activated Carbon,” Waste Management, Vol. 22, No. 5, 2002, pp. 543-548. doi:10.1016/S0956-053X(01)00016-2
 G. F. Cerofolini, M. Jaroniec and S. Sokosvski, “A Theoretical Isotherm for Adsorption on Heterogeneous Surface,” Colloid & Polymer Science, Vol. 256, No. 5, 1978, pp. 471-477. doi:10.1007/BF01405370
 G. Annadurai, R. Jeang and D. Lee, “Factor Optimization for Phenol Removal Using Activated Carbon,” Journal of Environmental Science and Health, Vol. 37, No. 2, 2002, pp. 149-161. doi:10.1081/ESE-120002579
 T. Nakamura, T. Tokimoto, T. Tamura, N. Kawacaki and S. Tanada, “Dechloraization of Acidic Dye by Charcoal from Coffee Grounds,” Journal of Health Science, Vol. 49. No. 6, 2003, pp. 520-523. doi:10.1248/jhs.49.520