{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/24434"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/24434","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Role of temperature and Suwannee river natural organic matter on inactivation kinetics of rotavirus and bacteriophage MS2 by solar irradiation","abstract":"Made available in DSpace on 2011-05-25T14:39:48Z (GMT). No. of bitstreams: 3 Romero_Ofelia.pdf: 6501565 bytes, checksum: fe0aa589df9e541a23580f2363d03961 (MD5) license.txt: 4062 bytes, checksum: 829b47b3a3520d37a121ee82aa85744f (MD5) Romero_Ofelia.doc: 1506304 bytes, checksum: 03f871e1f856b7fac083a89ee4db347f (MD5)","abstract_html":"Made available in DSpace on 2011-05-25T14:39:48Z (GMT). No. of bitstreams: 3 Romero_Ofelia.pdf: 6501565 bytes, checksum: fe0aa589df9e541a23580f2363d03961 (MD5) license.txt: 4062 bytes, checksum: 829b47b3a3520d37a121ee82aa85744f (MD5) Romero_Ofelia.doc: 1506304 bytes, checksum: 03f871e1f856b7fac083a89ee4db347f (MD5)","abstract_has_math":false,"creators":["Romero, Ofelia C."],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Environ Engr in Civil Engr","degree_department":null,"school":null,"contributors":["Nguyen, Thanh H."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-25T14:39:48Z","date_published":"2011-05-25T14:39:48Z","updated_at":"2026-07-22T22:25:23Z","subjects":["waste stabilization pond","rotavirus","MS2","solar disinfection","trace metals","organic matter","temperature"],"languages":["en"],"rights":["Copyright 2011 Ofelia C. Romero"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/24434","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Nguyen, Thanh H."]},{"key":"dc:creator","label":"Author","values":["Romero, Ofelia C."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-25T14:39:48Z","2013-05-26T10:00:26Z","2011-05"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Environ Engr in Civil Engr"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["waste stabilization pond","rotavirus","MS2","solar disinfection","trace metals","organic matter","temperature"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2011 Ofelia C. Romero"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/24434"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Made available in DSpace on 2011-05-25T14:39:48Z (GMT). No. of bitstreams: 3 Romero_Ofelia.pdf: 6501565 bytes, checksum: fe0aa589df9e541a23580f2363d03961 (MD5) license.txt: 4062 bytes, checksum: 829b47b3a3520d37a121ee82aa85744f (MD5) Romero_Ofelia.doc: 1506304 bytes, checksum: 03f871e1f856b7fac083a89ee4db347f (MD5)","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by William Ingram (wingram2@illinois.edu) on 2011-05-25T14:42:16Z Item is restricted until 2013-05-25T14:41:28Z","Item reinstated by Sarah Shreeves (sshreeve@illinois.edu) on 2013-05-26T10:00:26Z Item was in collections: University of Illinois Dissertations and Theses (ID: 204) Dissertations and Theses - Civil and Environmental Engineering (ID: 672) No. of bitstreams: 4 Romero_Ofelia.pdf.txt: 38 bytes, checksum: 79ea1886757ca90ee7643ee5d045e0fc (MD5) Romero_Ofelia.pdf: 6501565 bytes, checksum: fe0aa589df9e541a23580f2363d03961 (MD5) license.txt: 4062 bytes, checksum: 829b47b3a3520d37a121ee82aa85744f (MD5) Romero_Ofelia.doc: 1506304 bytes, checksum: 03f871e1f856b7fac083a89ee4db347f (MD5)","Item released from any restrictions by Sarah Shreeves (sshreeve@illinois.edu) on 2013-05-26T10:00:26Z","Indirect (UVA-visible spectrum) damage by exogenous sensitizers, indirect (UVB and UVA) damage by endogenous sensitizers, and direct UVB damage have been identified as three sunlight inactivation mechanisms for pathogens. This study investigated the role of temperature and Suwannee River natural organic matter (SRNOM) for each disinfection mechanism of rotavirus, an enteric virus, and MS2, a bacteriophage. For MS2 solutions irradiated at temperatures from 14-40°C, the inactivation rates followed the order: direct UVB damage > direct UVB damage in SRNOM solution > indirect UVA exogenous damage > indirect UVA endogenous damage. For rotavirus solutions irradiated at temperatures from 32-50°C, the inactivation rates (hr-1) were: direct UVB damage > direct UVB damage in SRNOM solution > indirect exogenous damage > indirect endogenous damage. Below 25°C, the indirect exogenous and endogenous damage were experimentally similar for rotavirus. Above 50°C, rotavirus inactivation was primarily due to heat damage. To further assess the rotavirus exogenous damage, quencher tests conducted at 50°C in the presence of 20 mg/L TOC demonstrate that H2O2 is important for rotavirus inactivation at high temperatures. However, other tests conducted with commercial H2O2 suggest that it is the role of H2O2 via the photo Fenton or Fenton-like pathways that is important, and that •OH radicals are primarily responsible for rotavirus inactivation. Efforts to quench or inhibit •OH radical formation with Na-formate and EDTA , respectively, in the presence of 20 mg/L TOC resulted in instantaneous damage to rotavirus. No other data were collected on the direct effects of •OH radicals. While indirect UVA exogenous damage was significant for MS2 over 14-40°C, this mechanism should be considered for rotavirus over a higher range of temperature from 32 to 50°C. The observed difference in inactivation of MS2 and rotavirus suggested that it is crucial to investigate disinfection using enteric viruses.","Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2011-04-22T00:53:48Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Romero_Ofelia.doc: 1506304 bytes, checksum: 03f871e1f856b7fac083a89ee4db347f (MD5) Romero_Ofelia.pdf: 6538910 bytes, checksum: 9e5496d7e4e88e57efa5aba1f5b826d9 (MD5)"]},{"key":"dc:title","label":"Title","values":["Role of temperature and Suwannee river natural organic matter on inactivation kinetics of rotavirus and bacteriophage MS2 by solar irradiation"]}]}],"canonical_facts":{"dc:contributor":["Nguyen, Thanh H."],"dc:creator":["Romero, Ofelia C."],"dc:date":["2011-05-25T14:39:48Z","2013-05-26T10:00:26Z","2011-05"],"dc:description":["Made available in DSpace on 2011-05-25T14:39:48Z (GMT). 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This study investigated the role of temperature and Suwannee River natural organic matter (SRNOM) for each disinfection mechanism of rotavirus, an enteric virus, and MS2, a bacteriophage. For MS2 solutions irradiated at temperatures from 14-40°C, the inactivation rates followed the order: direct UVB damage > direct UVB damage in SRNOM solution > indirect UVA exogenous damage > indirect UVA endogenous damage. For rotavirus solutions irradiated at temperatures from 32-50°C, the inactivation rates (hr-1) were: direct UVB damage > direct UVB damage in SRNOM solution > indirect exogenous damage > indirect endogenous damage. Below 25°C, the indirect exogenous and endogenous damage were experimentally similar for rotavirus. Above 50°C, rotavirus inactivation was primarily due to heat damage. To further assess the rotavirus exogenous damage, quencher tests conducted at 50°C in the presence of 20 mg/L TOC demonstrate that H2O2 is important for rotavirus inactivation at high temperatures. However, other tests conducted with commercial H2O2 suggest that it is the role of H2O2 via the photo Fenton or Fenton-like pathways that is important, and that •OH radicals are primarily responsible for rotavirus inactivation. Efforts to quench or inhibit •OH radical formation with Na-formate and EDTA , respectively, in the presence of 20 mg/L TOC resulted in instantaneous damage to rotavirus. No other data were collected on the direct effects of •OH radicals. While indirect UVA exogenous damage was significant for MS2 over 14-40°C, this mechanism should be considered for rotavirus over a higher range of temperature from 32 to 50°C. The observed difference in inactivation of MS2 and rotavirus suggested that it is crucial to investigate disinfection using enteric viruses.","Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2011-04-22T00:53:48Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Romero_Ofelia.doc: 1506304 bytes, checksum: 03f871e1f856b7fac083a89ee4db347f (MD5) Romero_Ofelia.pdf: 6538910 bytes, checksum: 9e5496d7e4e88e57efa5aba1f5b826d9 (MD5)"],"dc:identifier":["http://hdl.handle.net/2142/24434"],"dc:language":["en"],"dc:rights":["Copyright 2011 Ofelia C. Romero"],"dc:subject":["waste stabilization pond","rotavirus","MS2","solar disinfection","trace metals","organic matter","temperature"],"dc:title":["Role of temperature and Suwannee river natural organic matter on inactivation kinetics of rotavirus and bacteriophage MS2 by solar irradiation"],"thesis:degree_discipline":["Environ Engr in Civil Engr"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:23Z"}