CLU-IN Home

U.S. EPA Contaminated Site Cleanup Information (CLU-IN)


U.S. Environmental Protection Agency
U.S. EPA Technology Innovation and Field Services Division

Search Result

ENHANCED ELECTROKINETIC REMEDIATION OF MULTI-CONTAMINATED DREDGED SEDIMENTS AND INDUCED EFFECT ON THEIR TOXICITY
Benamar, A., Y. Tian, F. Portet-Koltalo, M.T. Ammami, N. Giusti-Petrucciani Y. Song, et al.
Chemosphere 228:744-755(2019)

Lab studies investigated EK efficiency on the mobility and the removal of metals, PAHs and PCBs from dredged sediments using a mixture of chelating agents and surfactants. Results showed that increasing chelating agent concentration was favorable for both metal and PAH removal. Applying a periodic voltage gradient associated with a low concentration of additives provided the best removal of Zn, Cd, and Pb, and 16 priority PAHs. Fresh harbor sediment was highly resistant to metals and organics mobilization and transport due to aged contamination, a high buffering capacity, a very low hydraulic permeability, and high organic matter content. However, experiments performed on aged sediments provided better removal results and involved low organic matter and carbonates content. The efficiency of the EK process was also assessed by measuring the acute toxicity of the EK-treated sediment on the copepod Eurytemora affinis exposed to sediment elutriates.



The Technology Innovation News Survey welcomes your comments and suggestions, as well as information about errors for correction. Please contact Michael Adam of the U.S. EPA Office of Superfund Remediation and Technology Innovation at adam.michael@epa.gov or (703) 603-9915 with any comments, suggestions, or corrections.

Mention of non-EPA documents, presentations, or papers does not constitute a U.S. EPA endorsement of their contents, only an acknowledgment that they exist and may be relevant to the Technology Innovation News Survey audience.