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Shannon, Mark A. Scheeline, Alexander Barna, Shama 2012-02-01T00:56:22Z 2014-02-01T11:00:35Z 2011-12 2012-02-01T00:56:22Z 2011-12 Phosphonate compounds are acutely toxic and have strong interactions with surfaces, which makes the detection and cleanup of such compounds necessary, but difficult, in a water treatment plant. If materials capable of catalyzing phosphonate decomposition are identified, the combined application of catalytic materials and membranes can lead to the effective treatment of wastewater with phosphonates and ensure subsequent removal of degradation by-products. The focus of this MSc thesis is to conduct a feasibility study of using silica supported catalysts as membrane materials to treat wastewater containing phosphonates. Because adsorption confounds the ability to study phosphonate decontamination chemistry, an equally important but easier to study compound, paraquat dichloride, has been selected for initial investigation. Both adsorption and decomposition kinetics have been explored utilizing different analytical techniques such as liquid chromatography mass spectrometry and UV-Vis spectrometry. The results demonstrate strong adsorption by the contaminant onto silica surfaces. Competitive binding model predictions are found to be consistent with experimental adsorption data. Addition of an exogenous agent (e.g. H2O2) was also attempted to assist paraquat decomposition; however, investigation of paraquat-H2O2 interaction both in presence and absence of the catalysts indicate that peroxide functionality was not effective for chemical decomposition of paraquat. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2011-12-07T14:43:27Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Barna_Shama.docx: 2872645 bytes, checksum: 08310c8f92a0b93c36c5b2a6e0484896 (MD5) Barna_Shama.pdf: 2895278 bytes, checksum: c3ecc41bf197dff7929e87d6d2295bba (MD5) Made available in DSpace on 2012-02-01T00:56:22Z (GMT). No. of bitstreams: 3 Barna_Shama.pdf: 3158982 bytes, checksum: 3656b142c81d673b070bf71866a25e2b (MD5) license.txt: 4059 bytes, checksum: 85b6e7d10ed5f1e1b0ca73875e6b374a (MD5) Barna_Shama.docx: 2877418 bytes, checksum: 6a3bdf2e16a164129fa3a4aad9e37557 (MD5) Item marked as restricted to the 'Administrator' Group (id=1) by William Ingram (wingram2@illinois.edu) on 2012-02-01T00:57:22Z Item is restricted until 2014-02-01T00:56:58Z Item reinstated by Sarah Shreeves (sshreeve@illinois.edu) on 2014-02-01T11:00:35Z Item was in collections: Graduate Theses and Dissertations at Illinois (ID: 204) Dissertations and Theses - Mechanical Science and Engineering (ID: 675) No. of bitstreams: 4 Barna_Shama.pdf: 3158982 bytes, checksum: 3656b142c81d673b070bf71866a25e2b (MD5) license.txt: 4059 bytes, checksum: 85b6e7d10ed5f1e1b0ca73875e6b374a (MD5) Barna_Shama.docx: 2877418 bytes, checksum: 6a3bdf2e16a164129fa3a4aad9e37557 (MD5) Barna_Shama.pdf.txt: 75581 bytes, checksum: 26b9d0bb50cf1ad94199c2bd3f2aa41a (MD5) Item released from any restrictions by Sarah Shreeves (sshreeve@illinois.edu) on 2014-02-01T11:00:35Z http://hdl.handle.net/2142/29578 en Copyright 2011 Shama Barna Adsorption Paraquat Removal Silica Adsorbents Peroxide Functionality Towards decomposition of phosphonates in water using catalytic membranes: paraquat on silica as a proxy Dissertation / Thesis text Mechanical Sci & Engineering 1917 Mechanical Engineering 0133 University of Illinois at Urbana-Champaign Thesis M.S. PHD:Mechanical Enginerng -UIUC 10KS0133PHD