Reactions of chlorinated ethenes with surface-sulfidated iron materials: reactivity enhancement and inhibition effects

2020 ◽  
Vol 22 (3) ◽  
pp. 759-770 ◽  
Author(s):  
Syful Islam ◽  
Yanlai Han ◽  
Weile Yan
Keyword(s):  
Reductive Dechlorination ◽  
Chlorinated Ethenes ◽  
Zerovalent Iron

Recent studies on the use of controlled sulfur amendment to improve the reactivity and selectivity of zerovalent iron (ZVI) in reductive dechlorination reactions have generated renewed interest in ZVI-based remediation materials.

scholarly journals A Microcosm Treatability Study for Evaluating Wood Mulch-Based Amendments as Electron Donors for Trichloroethene (TCE) Reductive Dechlorination

Water ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 1949
Author(s):  
Edoardo Masut ◽  
Alessandro Battaglia ◽  
Luca Ferioli ◽  
Anna Legnani ◽  
Carolina Cruz Viggi ◽  
...  
Keyword(s):  
Electron Donor ◽  
Environmental Sustainability ◽  
Reductive Dechlorination ◽  
Environmental Remediation ◽  
Low Cost ◽  
Chlorinated Solvents ◽  
Electron Donors ◽  
Chlorinated Ethenes ◽  
Dehalococcoides Mccartyi ◽  
Wood Mulch

In this study, wood mulch-based amendments were tested in a bench-scale microcosm experiment in order to assess the treatability of saturated soils and groundwater from an industrial site contaminated by chlorinated ethenes. Wood mulch was tested alone as the only electron donor in order to assess its potential for stimulating the biological reductive dechlorination. It was also tested in combination with millimetric iron filings in order to assess the ability of the additive to accelerate/improve the bioremediation process. The efficacy of the selected amendments was compared with that of unamended control microcosms. The results demonstrated that wood mulch is an effective natural and low-cost electron donor to stimulate the complete reductive dechlorination of chlorinated solvents to ethene. Being a side-product of the wood industry, mulch can be used in environmental remediation, an approach which perfectly fits the principles of circular economy and addresses the compelling needs of a sustainable and low environmental impact remediation. The efficacy of mulch was further improved by the co-presence of iron filings, which accelerated the conversion of vinyl chloride into the ethene by increasing the H2 availability rather than by catalyzing the direct abiotic dechlorination of contaminants. Chemical analyses were corroborated by biomolecular assays, which confirmed the stimulatory effect of the selected amendments on the abundance of Dehalococcoides mccartyi and related reductive dehalogenase genes. Overall, this paper further highlights the application potential and environmental sustainability of wood mulch-based amendments as low-cost electron donors for the biological treatment of chlorinated ethenes.

Reductive Dechlorination of Polychlorinated Biphenyls by Zerovalent Iron in Subcritical Water

1999 ◽  
Vol 33 (8) ◽  
pp. 1307-1310 ◽  
Author(s):  
Hwa K. Yak ◽  
Bernd W. Wenclawiak ◽  
I. Francis Cheng ◽  
John G. Doyle ◽  
Chien M. Wai
Keyword(s):  
Polychlorinated Biphenyls ◽  
Reductive Dechlorination ◽  
Subcritical Water ◽  
Zerovalent Iron

scholarly journals Integrative isotopic and molecular approach for the diagnosis and implementation of an efficient in-situ enhanced biological reductive dechlorination of chlorinated ethenes

2019 ◽  
Vol 167 ◽  
pp. 115106
Author(s):  
Natàlia Blázquez-Pallí ◽  
Mònica Rosell ◽  
Joan Varias ◽  
Marçal Bosch ◽  
Albert Soler ◽  
...  
Keyword(s):  
Reductive Dechlorination ◽  
Chlorinated Ethenes ◽  
Molecular Approach

Review of reactive kinetic models describing reductive dechlorination of chlorinated ethenes in soil and groundwater

2012 ◽  
Vol 110 (1) ◽  
pp. 1-23 ◽  
Author(s):  
Julie C. Chambon ◽  
Poul L. Bjerg ◽  
Charlotte Scheutz ◽  
Jacob Baelum ◽  
Rasmus Jakobsen ◽  
...  
Keyword(s):  
Kinetic Models ◽  
Reductive Dechlorination ◽  
Chlorinated Ethenes

Chlorine Isotope Fractionation during Reductive Dechlorination of Chlorinated Ethenes by Anaerobic Bacteria

2002 ◽  
Vol 36 (20) ◽  
pp. 4389-4394 ◽  
Author(s):  
Masahiko Numata ◽  
Noboru Nakamura ◽  
Hiromoto Koshikawa ◽  
Yutaka Terashima
Keyword(s):  
Reductive Dechlorination ◽  
Isotope Fractionation ◽  
Anaerobic Bacteria ◽  
Chlorinated Ethenes ◽  
Chlorine Isotope
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