Olu, S. C., P. E. Dim, and J. O. Okafor. “REMOVAL OF CU (II) FROM DYE EFFLUENT USING NATURAL AND PHOSPHATE-MODIFIED NIGERIAN KAOLINITE CLAY”. International Journal of Research -GRANTHAALAYAH 7, no. 8 (August 31, 2019): 402–414. Accessed December 1, 2022. https://www.granthaalayahpublication.org/journals/granthaalayah/article/view/IJRG19_A08_2623.