Isiuku, Beniah O., and Calistus N. Nwosu. “Fixed-Bed Adsorption of Metanil Yellow from Aqueous Solution on HNO3-Treated-H3PO4-Activated Carbon from Gmelina Bark”. Asian Journal of Chemistry, vol. 29, no. 3, Dec. 2016, pp. 475-9, doi:10.14233/ajchem.2017.20181.