1. Abd El Latif, M., MohyEldin, M. S., & El Kady, M. F. (2005). Settling of high concentrations of clay suspended in water by nonionic polyacrylamide flocculants. Engineering Journal, 44, 325–338.
2. Ani, J. U., Nnaji, N. J., Okoye, C. O. B., & Onukwuli, O. D. (2012). The coagulation performance of okra mucilage in an industrial effluent by turbidimetry. International Journal of Chemical Sciences, 10, 1293–1308.
3. Aroke, U. O., El-Nafaty, U. A., & Osha, O. A. (2013). Properties and characterization of kaolin clay from Alkaleri, north-eastern Nigeria. International Journal of Emerging Technology and Advanced Engineering, 3, 387–392.
4. Awang, N. A., & Aziz, H. A. (2012). Hibiscus rosa-sinensis leaf extract as coagulant aid in leachate treatment. Applied Water Science, 2, 293–298.
5. Awang, N. A., Aziz, H. A., Bashir, M. J. K., & Umar, M. (2013). Comparative removal of suspended solids from landfill leachate by Hibiscus rosa-sinensis leaf extract and alum. Desalination Water Treat, 51, 2005–2013.