Full metadata
Title
Treating energetics-contaminated wastewater
Description
This study reports on the treatment of ammunition wastewater containing RDX (1,3,5-Trinitro-1,3,5-triazinane), HMX (1,3,5,7-Tetranitro-1,3,5,7-tetrazoctane), and the oxyanion co-contaminants nitrate (NO3-) and perchlorate (ClO4-) in a membrane biofilm reactor (MBfR), a Palladium (Pd)-coated MBfR (Pd-MBfR), and an abiotic Pd-coated film reactor (Pd-film reactor). A consortium of nitrate- and perchlorate-reducing bacteria, continuously fed with synesthetic ammunition wastewater featuring 4 mM nitrate and 0.1-2 mM perchlorate, formed robust biofilms on the membrane surfaces in the MBfR and Pd-MBfR. PdNPs with diameter 4-5-nm auto-assembled and stabilized on the surfaces of membrane and biofilm in MPfR and Pd-MBfR. Nitrate and perchlorate were rapidly reduced by the biofilms in the MBfR and Pd-MBfR, but they were not catalytically reduced through PdNPs alone in the MPfR. In contrast, RDX or HMX was recalcitrant to enzymatic degradation in MBfR, but was rapidly reduced through Pd-catalytic denitration in the MPfR and Pd-MBfR to form ‒N‒NHOH or ‒N‒H. Based on the experimental results, the synergistic coupling of Pd-based catalysis and microbial activity in the Pd-MBfR should be a viable new technology for treating ammunition wastewater.
Date Created
2019
Contributors
- Zheng, Chenwei (Author)
- Rittmann, Bruce (Thesis advisor)
- Delgado, Anca (Committee member)
- Lai, Yen-Jung (Committee member)
- Arizona State University (Publisher)
Topical Subject
Resource Type
Extent
viii, 88 pages : illustrations (some color)
Language
eng
Copyright Statement
In Copyright
Primary Member of
Peer-reviewed
No
Open Access
No
Handle
https://hdl.handle.net/2286/R.I.55515
Statement of Responsibility
by Chenwei Zheng
Description Source
Viewed on November 12, 2020
Level of coding
full
Note
thesis
Partial requirement for: M.S., Arizona State University, 2019
bibliography
Includes bibliographical references (pages 81-88)
Field of study: Civil, environmental and sustainable engineering
System Created
- 2020-01-14 09:13:47
System Modified
- 2021-08-26 09:47:01
- 3 years 2 months ago
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