EDTA leaching of Cu contaminated soil using electrochemical treatment of the washing solution

A Critical Evaluation of Single Extractions from the SMT Program to Determine Trace Element Mobility in Sediments

“…Since the toxic wastewaters that are generated during soil washing with EDTA cannot be treated using conventional methods such as filtration, flocculation, and precipitation [47], several methods such as electrochemical advanced oxidation [48] or resin trapping techniques [41] have been tested to recuperate the washing solutions or to clean the wastewaters containing EDTA.…”

Anodic oxidation of 1,4-dioxane on boron-doped diamond electrodes for wastewater treatment

“…However, most AOP methods face economical inefficiencies that derive from both equipment capacities and operating costs with the consumption of expensive chemicals such as O 3 , H 2 O 2 , and ferrous iron, and expensive unit processes such as continuous UV irradiation [3,4,[6][7][8][9]. In recent years, interest has been developed in anodic oxidation of refractory organic pollutants for wastewater treatment such as electrochemical advanced oxidation processes (EAOPs) [10][11][12]. Strong oxidants like hydroxyl radicals can be generated on the anode by electrochemical reactions.…”

Using electrocoagulation for metal and chelant separation from washing solution after EDTA leaching of Pb, Zn and Cd contaminated soil

“…The treatment was much less effective when the washing solution was either turbid or coloured. Electrochemical (E)AOP [9,10] was more robust but consumed a significant amount of electricity and uses an expensive boron-doped diamond anode. Metals were removed from the soil washing solution by absorption in AOP and mainly by filtration in EAOP.…”