Ajala, L. O., V. I. Onwukeme, C. O. Oji, and M.-R. C. Ejiagha. “Sustainable Utilization of Rice Husk Activated Charcoal As Wastewater Decontaminant”. New Insights into Physical Science Vol. 2, July 2020, pp. 111-25, https://stm1.bookpi.org/index.php/nips-v2/article/view/1772.