Badamasi, Hamza, et al. “Speciation of Potentially Toxic Metals from the Mine Impacted Soils: A Case Study of Riruwai Mining Area, Kano State, Northern Nigeria”. Walisongo Journal of Chemistry, vol. 6, no. 1, July 2023, pp. 69-79, doi:10.21580/wjc.v6i1.16097.