Enhanced electrokinetic remediation (EKR) for heavy metal‐contaminated sediments focusing on treatment of generated effluents from EKR and recovery of EDTA

2020 ◽  
Vol 93 (1) ◽  
pp. 136-147
Author(s):  
Arulpoomalai Ayyanar ◽  
Shashidhar Thatikonda
Keyword(s):  
Heavy Metal ◽  
Electrokinetic Remediation ◽  
Contaminated Sediments

Electrokinetic Remediation of Dredged Contaminated Sediments

2021 ◽  
pp. 99-139
Author(s):  
Kristine B. Pedersen ◽  
Ahmed Benamar ◽  
Mohamed T. Ammami ◽  
Florence Portet‐Koltalo ◽  
Gunvor M. Kirkelund
Keyword(s):  
Electrokinetic Remediation ◽  
Contaminated Sediments

Removal of heavy metal from soil and groundwater by in-situ electrokinetic remediation

2000 ◽  
Vol 42 (7-8) ◽  
pp. 335-343 ◽  
Author(s):  
S. Shiba ◽  
S. Hino ◽  
Y. Hirata ◽  
T. Seno
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Electric Potential ◽  
Potential Gradient ◽  
Electrokinetic Remediation ◽  
Contaminated Aquifer ◽  
Physico Chemical ◽  
Operational Variables ◽  
Mass Transport Process

The operational variables of electrokinetic remediation have not been cleared yet, because this method is relatively new and is an innovative technique in the aquifer remediation. In order to investigate the operational variables of the electrokinetic remediation, a mathematical model has been constructed based on the physico chemical mass transport process of heavy metals in pore water of contaminated aquifer. The transport of the heavy metals is driven not only by the hydraulic flow due to the injection of the purge water but also by the electromigration due to the application of the electric potential gradient. The electric potential between anode and cathode is the important operational variable for the electrokinetic remediation. From the numerical simulations with use of this model it is confirmed that the remediation starts from the up stream anode and gradually the heavy metal is transported to the down stream cathode and drawn out through the purge water.

Electrokinetic Remediation of Heavy Metal Contaminated Soil Using Permeable Reactive Composite Electrodes

2012 ◽  
Vol 518-523 ◽  
pp. 361-368 ◽  
Author(s):  
Rong Bing Fu ◽  
Xin Xing Liu ◽  
Fang Liu ◽  
Jin Ma ◽  
Yu Mei Ma ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Removal Efficiency ◽  
Heavy Metal Ions ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Ph Control ◽  
Electrokinetic Remediation ◽  
Composite Electrodes ◽  
Remediation Process

A new permeable reactive composite electrode (PRCE) attached with a permeable reactive layer (PRL) of Fe0 and zeolite has been developed for soil pH control and the improved removal efficiency of heavy metal ions (Cd, Ni, Pb, Cu) from soil in electrokinetic remediation process. The effects of different composite electrodes on pH control and heavy metal removal efficiency were studied, and changes in the forms of heavy metals moved onto the electrodes were analyzed. The results showed that with acidic/alkaline zeolite added and renewed in time, the composite electrodes could effectively neutralize and capture H+ and OH- produced from electrolysis of the anolyte and catholyte, avoiding or delaying the formation of acidic/alkaline front in tested soil, preventing premature precipitation of heavy metal ions and over-acidification of soil, and thus significantly improved the heavy metal removal efficiency. Fe0 in composite electrodes could deoxidize and stabilize the heavy metal ions. After that capture and immobilization of the pollutants were achieved. The results also showed that, using "Fe0 + zeolite" PRCE in the cathode with timely renewal, after 15-day remediation with a DC voltage of 1.5 V/cm, the total removal rates of Cd, Pb, Cu and Ni were 49.4%, 47.1%, 36.7% and 39.2%, respectively.

Heavy metal speciation in waters, sediments and biota from Lake Macquarie, New South Wales

1987 ◽  
Vol 38 (5) ◽  
pp. 591 ◽  
Author(s):  
GE Batley
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Surface Sediments ◽  
Metal Speciation ◽  
New South ◽  
New South Wales ◽  
Contaminated Sediments ◽  
Zinc Smelter ◽  
South Wales ◽  
Lead Zinc

The distribution and bioavailability of heavy metals in waters and sediments from Lake Macquarie (N.S.W.) have been examined. Elevated concentrations of zinc, lead, cadmium and copper detected in surface sediments and waters from the northern end of the lake are attributable to discharges from a lead-zinc smelter on Cockle Creek. The majority of the metals are in bioavailable forms and are shown to be accumulated in seagrasses, seaweeds and bivalves. Calculations indicate that, at the current rates of discharge, the concentrations of bioavailable metals in newly-deposited sediments should not be deleterious. Elutriate tests showed that there will be no significant mobilization of metals during dredging operations to remove the contaminated sediments.

scholarly journals Strategic selection of an optimal sorbent mixture for in-situ remediation of heavy metal contaminated sediments: Framework and case study

2012 ◽  
Vol 105 ◽  
pp. 1-11 ◽  
Author(s):  
Y.W. Chiang ◽  
R.M. Santos ◽  
K. Ghyselbrecht ◽  
V. Cappuyns ◽  
J.A. Martens ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Contaminated Sediments ◽  
In Situ Remediation ◽  
Selection Of

The Application of Solar Cells in the Electrokinetic Remediation of Metal Contaminated Sediments

2017 ◽  
Vol 89 (7) ◽  
pp. 663-671 ◽  
Author(s):  
Natasa S. Varga ◽  
Bozo D. Dalmacija ◽  
Miljana Dj. Prica ◽  
Djurdja V. Kerkez ◽  
Milena Dj. Becelic-Tomin ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electrokinetic Remediation ◽  
Contaminated Sediments

Carbonaceous halloysite nanotubes for the stabilization of Co, Ni, Cu and Zn in river sediments

2019 ◽  
Vol 6 (8) ◽  
pp. 2420-2428 ◽  
Author(s):  
Yunsong Liu ◽  
Yuanyuan Tang ◽  
Penglei Wang ◽  
Hui Zeng
Keyword(s):  
Heavy Metal ◽  
River Sediments ◽  
Halloysite Nanotubes ◽  
Contaminated Sediments ◽  
Cu And Zn

The remediation of heavy metal contaminated sediments has become a global consideration, especially the development of economically and environmentally efficient amendments.

Sign in / Sign up

Export Citation Format

Share Document