Ukiwe LN, J.I A, A.E E, C.I.C A, S.I I. Chemical and Biological Leaching Methods to Remove Heavy Metals from Sewage Sludge: A Review. JAC [Internet]. 2008 Dec. 12 [cited 2024 May 18];4(3):509-17. Available from: https://rajpub.com/index.php/jac/article/view/948