composts derived from municipal (MOW and MSW) anddomestic waste (DOM), wastes from the Olive oil industry (OWH and OP), green waste (GW), and biochars (BF and BS) were investigated to test their viability for remediating metal-contaminated soils. In addition to common analyses, the characterisation included structural analyses, determination of the acid neutralisation capacity (ANC) and the construction of sorption isotherms for target metals (Pb, Zn). MOW and GW had the highest ANC values (4280 and 7100 meq/kg,respectively), and MOW, GW, DOM, BF, and BS exhibited the highest solid-liquid distribution coefficients with maximum values in the 1000 l/kg range. Sorption isotherms were fitted using linear and Freundlich models for better comparison of the sorption capacities of the materials. Based on their basic pH, high ANC and high sorption capacity, MOW, GW, and biochars are the most promising materials.