The intervention management strategy to mitigate ecotoxicity in a heavy metal (HM)-contaminated soil was evaluated through a new soil remediation technique trial by using extracts of composts and vermicomposts from Municipal Solid Waste (MSW). The MSW composts and vermicomposts which were >9.423 mm in size referred as coarse and those <0.991 mm denoted as ground. The reduction percentage (R) for both compost-extracts and vermicompost-extracts from coarse samples was in the order of Ni > Co > Cu > Cd > Cr >Zn. Results showed that treatments with compost-extracts from ground samples removed 90.83% Ni, 90.45% Co, 84.64% Cu, 79.01% Cd, 76.85% Cr and 76.77% Zn from the contaminated soil. On the contrary, treatments with vermicompost-extracts from ground samples caused moderately higher reduction in Ni (91.52%), Co (90.69%), Cu (85.18%), Cd (81.42%), Cr (79.06%) and Zn (79.02%). The remediation factors (RFs) of the HMs from the ground vermicompost-extracts can be classified in the order: Ni (8.06-10.98) > Co (8.28-10.61) > Cu (5.44-5.76) > Cd (2.82-4.41) > Zn (2.93-3.77) > Cr (1.37-2.11) whilst a lower RF value was obtained for the remediation treatments from the ground compost-extracts. Yet, in contrast of using compost-extracts from both coarse and ground samples to remediate metalliferous soil, data analysis revealed that vermicompost-extracts were more proficient in the mitigation of the concentration of HMs. (C) 2018 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.