Remediation of contaminated marine sediment using electrokinetic–Fenton technology

In this work dredge marine sediments contaminated by petroleum hydrocarbon (TPH) and metals, such as Zn, Pb, Cu and Hg, were treated by electrokinetic treatment. EDTA and Tween 80 were used as processing fluid to enhance the solubility of metals and TPH, respectively. On the other hand, a combination of a Fentonʹs reagent and EDTA was evaluated to promote the in situ degradation of TPH and to solubilize the metals. After 30 days of treatment, the best results were obtained by EK–Fenton–EDTA process with a removal of about 90% for TPH, 57.3% of Zn, 59.8% of Pb, 59.4% of Cu and 54.5% of Hg.