Assessment of water treatment residuals as sorbent material in permeable reactive barriers: Application to a copper-contaminated site

2018 ◽  
Vol 29 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Chris Walkons ◽  
Alex Mayer ◽  
Rupali Datta ◽  
Dibyendu Sarkar
Keyword(s):  
Water Treatment ◽  
Permeable Reactive Barriers ◽  
Contaminated Site ◽  
Water Treatment Residuals ◽  
Sorbent Material ◽  
Reactive Barriers ◽  
Copper Contaminated

scholarly journals Tracing the Scientific History of Fe0-Based Environmental Remediation Prior to the Advent of Permeable Reactive Barriers

Processes ◽  
2020 ◽  
Vol 8 (8) ◽  
pp. 977 ◽  
Author(s):  
Viet Cao ◽  
Huichen Yang ◽  
Arnaud Igor Ndé-Tchoupé ◽  
Rui Hu ◽  
Willis Gwenzi ◽  
...  
Keyword(s):  
Water Treatment ◽  
Environmental Remediation ◽  
Groundwater Remediation ◽  
Permeable Reactive Barriers ◽  
Careful Examination ◽  
Organic Species ◽  
Operating Modes ◽  
Complex Picture ◽  
Reactive Barriers ◽  
Water Provision

The technology of using metallic iron (Fe0) for in situ generation of iron oxides for water treatment is a very old one. The Fe0 remediation technology has been re-discovered in the framework of groundwater remediation using permeable reactive barriers (PRBs). Despite its simplicity, the improvement of Fe0 PRBs is fraught with difficulties regarding their operating modes. The literature dealing with Fe0 remediation contains ambiguities regarding its invention and its development. The present paper examines the sequence of contributions prior to the advent of Fe0 PRBs in order to clarify the seemingly complex picture. To achieve this, the current paper addresses the following questions: (i) What were the motivations of various authors in developing their respective innovations over the years?, (ii) what are the ancient achievements which can accelerate progress in knowledge for the development of Fe0 PRBs?, and (iii) was Fe0 really used for the removal of organic species for the first time in the 1970s? A careful examination of ancient works reveals that: (i) The wrong questions were asked during the past three decades, as Fe0 was premised as a reducing agent, (ii) credit for using Fe0 for water treatment belongs to no individual scientist, and (iii) credit for the use of Fe0 in filtration systems for safe drinking water provision belongs to scientists from the 1850s, while credit for the use of Fe0 for the removal of aqueous organic species does not belong to the pioneers of the Fe0 PRB technology. However, it was these pioneers who exploited Fe0 for groundwater remediation, thereby extending its potential. Complementing recent achievements with the chemistry of the Fe0/H2O system would facilitate the design of more sustainable Fe0-remediation systems.

Biofilm communities and biodegradation within permeable reactive barriers at fuel spill sites in Antarctica

2017 ◽  
Vol 125 ◽  
pp. 45-53 ◽  
Author(s):  
Benjamin L. Freidman ◽  
Lachlan B.M. Speirs ◽  
Jack Churchill ◽  
Sally L. Gras ◽  
Joe Tucci ◽  
...  
Keyword(s):  
Permeable Reactive Barriers ◽  
Reactive Barriers
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