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.

Calcium carbonate-based permeable reactive barriers for iron and manganese groundwater remediation at landfills

2016 ◽  
Vol 53 ◽  
pp. 128-135 ◽  
Author(s):  
Yu Wang ◽  
Saraya Pleasant ◽  
Pradeep Jain ◽  
Jon Powell ◽  
Timothy Townsend
Keyword(s):  
Calcium Carbonate ◽  
Groundwater Remediation ◽  
Permeable Reactive Barriers ◽  
Reactive Barriers ◽  
Iron And Manganese

scholarly journals Role of Microorganisms in Permeable Reactive Bio-Barriers (PRBBs) for Environmental Clean-Up: A Review

2018 ◽  
Vol 20 (2) ◽  
pp. 269-280 ◽  
Keyword(s):  
Environmental Remediation ◽  
Gradient Flow ◽  
Permeable Reactive Barriers ◽  
Permeable Reactive Barrier ◽  
Innovative Technology ◽  
Reactive Barrier ◽  
Reactive Barriers ◽  
Long Term Performance ◽  
Term Performance ◽  
Reactive Media

It is an indisputable fact that any environmental clean-up technology generating certain kind of effective result would be easily supported. One of them includes Permeable reactive bio-barrier which is an innovative technology started from 90’s to treat a variety of contaminants along the natural gradient flow of groundwater through immobilization or transformation of pollutants into less toxic and harmful form. Despite of any broad acknowledgement, there are lesser known knowledge about use of microorganisms in permeable reactive barriers, mingling of microorganisms with other reactive media and their effect on each other’s reactivity. The current review deals with an overview of the types of reactive media used in Permeable Reactive Barriers (PRBs) as well as different bio-barriers (PRBBs) utilized for the treatment of various contaminants, long–term performance of permeable reactive barrier and combination of microorganism and reactive media to look forward for their symbiotic relationship in permeable reactive barrier for environmental remediation.

scholarly journals Metallic Iron for Environmental Remediation: Starting an Overdue Progress in Knowledge

Water ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 641 ◽  
Author(s):  
Rui Hu ◽  
Huichen Yang ◽  
Ran Tao ◽  
Xuesong Cui ◽  
Minhui Xiao ◽  
...  
Keyword(s):  
Water Treatment ◽  
Literature Review ◽  
Metallic Iron ◽  
Environmental Remediation ◽  
Isotherm Models ◽  
Critical Survey ◽  
Root Cause ◽  
Water Provision ◽  
Adsorption Kinetics And Isotherm

A critical survey of the abundant literature on environmental remediation and water treatment using metallic iron (Fe0) as reactive agent raises two major concerns: (i) the peculiar properties of the used materials are not properly considered and characterized, and, (ii) the literature review in individual publications is very selective, thereby excluding some fundamental principles. Fe0 specimens for water treatment are typically small in size. Before the advent of this technology and its application for environmental remediation, such small Fe0 particles have never been allowed to freely corrode for the long-term spanning several years. As concerning the selective literature review, the root cause is that Fe0 was considered as a (strong) reducing agent under environmental conditions. Subsequent interpretation of research results was mainly directed at supporting this mistaken view. The net result is that, within three decades, the Fe0 research community has developed itself to a sort of modern knowledge system. This communication is a further attempt to bring Fe0 research back to the highway of mainstream corrosion science, where the fundamentals of Fe0 technology are rooted. The inherent errors of selected approaches, currently considered as countermeasures to address the inherent limitations of the Fe0 technology are demonstrated. The misuse of the terms “reactivity”, and “efficiency”, and adsorption kinetics and isotherm models for Fe0 systems is also elucidated. The immense importance of Fe0/H2O systems in solving the long-lasting issue of universal safe drinking water provision and wastewater treatment calls for a science-based system design.

scholarly journals Effects of calcium ion and pH on the adsorption/regeneration process by activated carbon permeable reactive barriers

RSC Advances ◽  
2018 ◽  
Vol 8 (30) ◽  
pp. 16834-16841 ◽  
Author(s):  
Shengpin Li ◽  
Wenpeng Li ◽  
Honghan Chen ◽  
Fei Liu ◽  
Song Jin ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Calcium Ion ◽  
Groundwater Remediation ◽  
Permeable Reactive Barriers ◽  
Regeneration Process ◽  
Permeable Barriers ◽  
Reactive Barriers

Activated carbon (AC) is widely used in groundwater remediation, more specifically, for the activated carbon permeable barriers (AC-PRBs).

An overview of permeable reactive barriers for in situ sustainable groundwater remediation

Chemosphere ◽  
2014 ◽  
Vol 111 ◽  
pp. 243-259 ◽  
Author(s):  
Franklin Obiri-Nyarko ◽  
S. Johana Grajales-Mesa ◽  
Grzegorz Malina
Keyword(s):  
Groundwater Remediation ◽  
Permeable Reactive Barriers ◽  
Reactive Barriers
Sign in / Sign up

Export Citation Format

Share Document