The remediation of sediments contaminated with both total petroleum hydrocarbons (TPH) and heavy metals poses significant environmental and health risks. This study explores a multi-step combined remediation approach using Fenton oxidation, thermal desorption, and acid washing to address such contamination. Each process was optimized individually. Acid washing efficiently removed heavy metals, meeting Dutch standards, but showed limited TPH removal. Fenton oxidation reduced TPH by 77%, though heavy metal removal was insufficient. Thermal desorption, however, successfully eliminated TPH at temperatures above 300°C. Combining acid washing and thermal desorption achieved remediation targets for both TPH and heavy metals, regardless of process order, meeting industrial standards. The treated sediment can be safely reused as a resource, offering a sustainable solution for managing contaminated sediments. This integrated approach demonstrates an effective method for remediating sediments contaminated by both TPH and heavy metals, addressing both environmental and economic challenges.

Keywords: Sediments remediation, Fenton oxidation, Thermal desorption, Acid washing