Grantee Research Project Results
Final Report: Membrane-Based Nanostructured Metals for Reductive Degradation of Hazardous Organics at Room Temperature
EPA Grant Number: R829621Title: Membrane-Based Nanostructured Metals for Reductive Degradation of Hazardous Organics at Room Temperature
Investigators: Bhattacharyya, Dibakar , Bachas, Leonidas G. , Ritchie, Stephen M.C. , Meyer, David , Lewis, Scott , Tee, Y.
Institution: University of Kentucky , The University of Alabama
EPA Project Officer: Hahn, Intaek
Project Period: January 1, 2002 through December 31, 2004 (Extended to March 31, 2006)
Project Amount: $345,000
RFA: Exploratory Research: Nanotechnology (2001) RFA Text | Recipients Lists
Research Category: Hazardous Waste/Remediation , Nanotechnology , Safer Chemicals
Objective:
The overall objective of this research project was the development and fundamental understanding of reductive dechlorination of selected classes of hazardous organics by immobilized nanosized metal particles in polymeric membrane systems. This integrated research involved nanoparticle synthesis in various membrane platforms, the role of metal surface area and surface sites, the potential role of ordered nanodomain in membranes for separation and reaction, and membrane partitioning/reaction kinetics. The additional benefits of this work include significant reduction of materials usage and miniaturization of dechlorination reactor systems by more efficient use of metals and selectivity.
Summary/Accomplishments (Outputs/Outcomes):
This research project focused on understanding dechlorination using bimetallic iron/nickel and iron/palladium nanosystems immobilized within a membrane domain. The significant accomplishments are: (1) synthesized and immobilized bimetallic nanoparticles with controlled diameters less than 30 nm using membrane-based supports derived from either polyligand functionalization and ion exchange or phase inversion synthesis; (2) established methods to characterize bimetallic nanoparticles in the presence of a polymer support using electron microscopy to quantify the role of the second metal during bimetallic reduction mechanisms; (3) demonstrated complete (with product and intermediates analysis) dechlorination of trichloroethene (TCE) and selected polychlorinated biphenyls (PCBs) by membrane-based nanosized metals; (4) achieved up to an order of magnitude enhancement of reported reaction rates for the reductive destruction of TCE and selected PCBs; (5) established reactive material stability by repeat cycle experiments with TCE dechlorination; and (6) derived a model describing the fate of chlorinated compounds within reductive membrane systems, which can be used to explain the impact of transport phenomena on dechlorination rates in immobilized nanoparticle systems.
Conclusions:
We demonstrated new approaches of nanoparticle synthesis in hydrophilized membranes for detoxification of chemicals of concern. We quantified the role of a second dopant metal through dechlorination reaction and by metal distribution studies. The particle size can be controlled by varying the ratio of polyacrylic acid (PAA) and metal ions. The reactivity of nanoparticles was further quantified both in terms of reaction mechanism shift and product distribution. The enhanced reaction rate, complete dechlorination, and insignificant loss of dissolved metals by nanoparticles in PAA functionalized membranes are important achievements in the area of toxic organic remediation.
Journal Articles on this Report : 5 Displayed | Download in RIS Format
| Other project views: | All 34 publications | 8 publications in selected types | All 6 journal articles |
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Hollman AM, Scherrer NT, Cammers-Goodwin A, Bhattacharyya D. Separation of dilute electrolytes in poly(amino acid) functionalized microporous membranes: model evaluation and experimental results. Journal of Membrane Science 2004;239(1):65-79 |
R829621 (2002) R829621 (2003) R829621 (Final) |
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Meyer DE, Wood K, Bachas LG, Bhattacharyya D. Degradation of chlorinated organics by membrane-immobilized nanosized metals. Environmental Progress 2004;23(3):232-242 |
R829621 (2003) R829621 (Final) |
not available |
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Tee YH, Grulke E, Bhattacharyya D. Role of Ni/Fe nanoparticle composition on the degradation of trichloroethylene from water. Industrial & Engineering Chemistry Research 2005;44(18):7062-7070. |
R829621 (Final) |
not available |
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Xu J, Bhattacharyya D. Membrane-based bimetallic nanoparticles for environmental remediation: synthesis and reactive properties. Environmental Progress 2005;24(4):358-366. |
R829621 (Final) |
Exit |
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Xu J, Dozier A, Bhattacharyya D. Synthesis of nanoscale bimetallic particles in polyelectrolyte membrane matrix for reductive transformation of halogenated organic compounds. Journal of Nanoparticle Research 2005;7(4-5):449-467. |
R829621 (2003) R829621 (Final) |
not available |
Supplemental Keywords:
reductive dechlorination, nanoscale bimetallic particles, dechlorination, bimetallic nanoparticles, nanostructured metals, chlorinated compounds,, Sustainable Industry/Business, RFA, Scientific Discipline, Toxics, Technology for Sustainable Environment, Engineering, Civil/Environmental Engineering, Sustainable Environment, Environmental Chemistry, Analytical Chemistry, Chemistry and Materials Science, VOCs, Biochemistry, New/Innovative technologies, Environmental Engineering, reductive dechlorination, sustainability, innovative technologies, environmentally applicable nanoparticles, hazardous organics, recycle, nanotechnology, membrane-based nanostructured metalsProgress and Final Reports:
Original AbstractThe perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.