Enhanced Electroremediation of Metals from Dredged Marine Sediment under Periodic Voltage Using EDDS and Citric Acid

The electrokinetic remediation (EKR) method has been extensively considered for the removal of inorganic pollutants from contaminated dredged sediment. In addition, use chelating agents as electrolyte solutions beneficial in increasing mobility metals. This study investigated metals’ (Cd, Cr, Cu, Pb, and Zn) mobilities by assessing effect two environmentally friendly agents, ethylenediaminedisuccinic acid (EDDS) citric (CA), enhancing EKR efficiency under a periodic voltage gradient. results showed that, same concentration (0.1 mol L?1), CA is more suitable Cr (67.83%), Cu (59.77%), Pb (32.05%) desorbing them sediment matrix concentrating electrode compartments. EDDS provided to improve Cd extraction percentage (45.87%), whereas had comparable improvement impacts on Zn (39.32% 41.37%, respectively). From comparison with previous obtained continuous voltage, applying gradient associated low led promising result.