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Adediran, G.O and Adediji, J.F and Adebayo, M.A and Dada, Adewumi O. (2009) Removal of Pb2+ and Cr6+ ions from aqueous solution by earthworm cast soil. Removal of Pb2+ and Cr6+ ions from aqueous solution by earthworm cast soil, 4 (11). pp. 691-697. ISSN ISSN 1992 - 1950