Towards the application of electrokinetic remediation for nuclear site decommissioning

2021 ◽  
Vol 413 ◽  
pp. 125274
Author(s):  
Jamie M. Purkis ◽  
Phil E. Warwick ◽  
James Graham ◽  
Shaun D. Hemming ◽  
Andrew B. Cundy
2011 ◽  
Vol 186 (2-3) ◽  
pp. 1405-1414 ◽  
Author(s):  
Kieran Agnew ◽  
Andrew B. Cundy ◽  
Laurence Hopkinson ◽  
Ian W. Croudace ◽  
Phillip E. Warwick ◽  
...  

Author(s):  
S.M.P.A Koliyabandara ◽  
Chamika Siriwardhana ◽  
Sakuni M. De Silva ◽  
Janitha Walpita ◽  
Asitha T. Cooray

2021 ◽  
Vol 11 (4) ◽  
pp. 1799
Author(s):  
Claudio Cameselle ◽  
Susana Gouveia ◽  
Adrian Cabo

The electrokinetic remediation of an agricultural soil contaminated with heavy metals was studied using organic acids as facilitating agents. The unenhanced electrokinetic treatment using deionized water as processing fluid did not show any significant mobilization and removal of heavy metals due to the low solubilization of metals and precipitation at high pH conditions close to the cathode. EDTA and citric acid 0.1 M were used as facilitating agents to favor the dissolution and transportation of metals. The organic acids were added to the catholyte and penetrated into the soil specimen by electromigration. EDTA formed negatively charged complexes. Citric acid formed neutral metal complexes in the soil pH conditions (pH = 2–4). Citric acid was much more effective in the dissolution and transportation out of the soil specimen of complexed metals. In order to enhance the removal of metals, the concentration of citric acid was increased up to 0.5 M, resulting in the removal of 78.7% of Cd, 78.6% of Co, 72.5% of Cu, 73.3% of Zn, 11.8% of Cr and 9.8% of Pb.


Author(s):  
Kristine B. Pedersen ◽  
Ahmed Benamar ◽  
Mohamed T. Ammami ◽  
Florence Portet‐Koltalo ◽  
Gunvor M. Kirkelund

2000 ◽  
Vol 42 (7-8) ◽  
pp. 335-343 ◽  
Author(s):  
S. Shiba ◽  
S. Hino ◽  
Y. Hirata ◽  
T. Seno

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.


Chemosphere ◽  
2014 ◽  
Vol 117 ◽  
pp. 673-678 ◽  
Author(s):  
Sivasankar Annamalai ◽  
Manikandan Santhanam ◽  
Maruthamuthu Sundaram ◽  
Marta Pazos Curras

Author(s):  
Diletta Colette Invernizzi ◽  
Giorgio Locatelli ◽  
Naomi J. Brookes ◽  
Martin Grey

Project management literature has, until now, mainly focused on new build and only in the last decades the issues of decommissioning (mega) projects has arisen. To respond to this changing environment, project management will need to understand the challenges of decommissioning projects. Decommissioning projects within Oil & Gas, Chemical and Nuclear sectors are characterized by high costs, long schedules and uncertainty-based risks. The budget for Nuclear Decommissioning Projects and Programmes (NDPs) are subject to well publicized increases and, due to their relatively recent emergence, complexity and variety, key stakeholders lack a full understanding of the key factors influencing these increases. Benchmarking involves “comparing actual or planned practices [...] to identify best practices, generate ideas for improvement” [1] and offers significant potential to improve the performance of project selection, planning and delivery. However, even if benchmarking is the envisaged methodology to investigate the NDPs characteristics that impact on the NDPs performance, until now, it has only been partially used and there is a huge gap in the literature concerning benchmarking NDPs. This paper adapts a top-down benchmarking approach to highlight the NDPs characteristics that mostly impact on the NDPs performance. This is exemplified by a systematic quantitative and qualitative cross-comparison of two major “similar-but-different” NDPs: Rocky Flats (US) and Sellafield (UK). Main results concern the understanding of the alternatives of the owner and/or the contractors in relation to (1) the physical characteristics and the end state of the nuclear site, (2) the governance, funding & contracting schemes, and (3) the stakeholders’ engagement.


Sign in / Sign up

Export Citation Format

Share Document