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Degradation of TCE by TEOS Coated nZVI in the Presence of Cu(II) for Groundwater Remediation
Joint Authors
Eglal, Mahmoud M.
Ramamurthy, Amruthur S.
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-12-31
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
The removal of TCE by nanofer zero valent iron (nanofer ZVI) coated with tetraethyl orthosilicate (TEOS) in the presence of Cu(II) at different environmental conditions was studied.
The kinetics of TCE degradation by nanofer ZVI was determined.
At a dosage of 10 mg of nanofer ZVI, almost 63% of TCE was removed, when Cu(II) and TCE were present.
It contrasts with 42% degradation of TCE in the absence of Cu(II).
SEM/EDS images indicated that Cu(II) is reduced to form Cu 0 and Cu2O.
These formations are considered to be responsible for enhancing TCE degradation.
Direct reduction involves hydrogenolysis and β -elimination in the transformation of TCE, while indirect reduction involves atomic hydrogen and no direct electron transfer from the metal to reactants.
The reduction of activation energy was also noted indicating that the rate limiting step for TCE degradation in the presence of Cu(II) is surface chemical reaction rather than diffusion.
Most of iron present in nanofer ZVI get dissolved causing the generation of localized positive charge regions and form metal chlorides.
Local accumulation of hydrochloric acid inside the pits regenerates new reactive surfaces to serve as sources of continuous electron generation.
No significant effect of TCE was noticed for Cu(II) sequestration.
American Psychological Association (APA)
Ramamurthy, Amruthur S.& Eglal, Mahmoud M.. 2014. Degradation of TCE by TEOS Coated nZVI in the Presence of Cu(II) for Groundwater Remediation. Journal of Nanomaterials،Vol. 2014, no. 2014, pp.1-9.
https://search.emarefa.net/detail/BIM-1041681
Modern Language Association (MLA)
Ramamurthy, Amruthur S.& Eglal, Mahmoud M.. Degradation of TCE by TEOS Coated nZVI in the Presence of Cu(II) for Groundwater Remediation. Journal of Nanomaterials No. 2014 (2014), pp.1-9.
https://search.emarefa.net/detail/BIM-1041681
American Medical Association (AMA)
Ramamurthy, Amruthur S.& Eglal, Mahmoud M.. Degradation of TCE by TEOS Coated nZVI in the Presence of Cu(II) for Groundwater Remediation. Journal of Nanomaterials. 2014. Vol. 2014, no. 2014, pp.1-9.
https://search.emarefa.net/detail/BIM-1041681
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1041681