|
Title
|
|
|
|
Remediation of trichloroethylene by bio-precipitated and encapsulated palladium nanoparticles in a fixed bed reactor
|
|
|
Author
|
|
|
|
|
|
|
Abstract
|
|
|
|
| Trichloroethylene is a toxic and recalcitrant groundwater pollutant. Palladium nanoparticles bio-precipitated on Shewanella oneidensis were encapsulated in polyurethane, polyacrylamide, alginate, silica or coated on zeolites. The reactivity of these bio-Pd beads and zeolites was tested in batch experiments and trichloroethylene dechlorination followed first order reaction kinetics. The calculated k-values of the encapsulated catalysts were a factor of six lower compared to non-encapsulated bio-Pd. Bio-Pd, used as a catalyst, was able to dechlorinate 100 mg L(-1) trichloroethylene within a time period of 1 h. The main reaction product was ethane; yet small levels of chlorinated intermediates were detected. Subsequently polyurethane cubes empowered with bio-Pd were implemented in a fixed bed reactor for the treatment of water containing trichloroethylene. The influent recycle configuration resulted in a cumulative removal of 98% after 22 h. The same reactor in a flow through configuration achieved removal rates up to 1059 mg trichloroethylene g Pd(-1) d(-1). This work showed that fixed bed reactors with bio-Pd polyurethane cubes can be instrumental for remediation of water contaminated with trichloroethylene. (C) 2009 Elsevier Ltd. All rights reserved. |
|
|
|
Language
|
|
|
|
English
|
|
|
Source (journal)
|
|
|
|
Chemosphere. - Oxford, 1972, currens
|
|
|
Publication
|
|
|
|
Oxford
:
2009
|
|
|
ISSN
|
|
|
|
0045-6535
[print]
1879-1298
[online]
|
|
|
DOI
|
|
|
|
10.1016/J.CHEMOSPHERE.2009.05.046
|
|
|
Volume/pages
|
|
|
|
76
:9
(2009)
, p. 1221-1225
|
|
|
ISI
|
|
|
|
000269780900008
|
|
|
Full text (Publisher's DOI)
|
|
|
|
|
|
|
Full text (publisher's version - intranet only)
|
|
|
|
|
|