{"id":460,"date":"2016-09-22T20:40:53","date_gmt":"2016-09-23T01:40:53","guid":{"rendered":"https:\/\/uwm.edu\/guo-lab\/?page_id=460"},"modified":"2026-04-05T14:58:27","modified_gmt":"2026-04-05T19:58:27","slug":"presentations","status":"publish","type":"page","link":"https:\/\/uwm.edu\/guo-lab\/cv\/presentations\/","title":{"rendered":"Presentations"},"content":{"rendered":"

\"\"<\/a><\/p>\n

Conference presentations\/Invited seminars (since jointed 51ÁÔÆæ in 2012):<\/strong><\/p>\n

    \n
  1. Zhou, Z., Guo, L<\/strong>. and He, H. 2012. UV and fluorescence characteristics of DOM from the Gulf of Mexico five months after the Deep-water Horizon oil spill. The 2012 Ocean Science Meeting, February 22-24, 2012, Salt Lake City, UT (Abstract# 050-11847).<\/li>\n
  2. Yang, W. and Guo, L<\/strong>. 2012. Residence time of atmospheric radioiodine (I-131) from Fukushima accident. The 2012 Ocean Science Meeting, February 22-24, 2012, Salt Lake City, UT (Abstract#088-12442).<\/li>\n
  3. Guo, L<\/strong>., Chen, M., Roberts, K.A. and Santschi, P.H. 2012. Redox control of the partitioning and scavenging of Fe(II,III) and Pa(IV, V) in seawater: Role of natural organic matter. The 2012 Ocean Science Meeting, February 22-24, 2012, Salt Lake City, UT (Abstract#166-12303).<\/li>\n
  4. Mitra, K. and Guo, L<\/strong>. 2012. Seasonal variations of dissolved and particulate carbohydrate in the Mississippi Sound\/Bight.\u00a0 Mississippi Academy of Sciences Annual Meeting, Feb 23-24, 2012, Hattiesburg, MS.<\/li>\n
  5. Guo, L<\/strong>., He, H.J., Zhou, Z. and Mitra, K. 2012. Dynamics of organic carbon and nutrients in lake Pontchartrain, southeast Louisiana. Abstract for the 2012 ASLO Aquatic Sciences Meeting (Abstract # SS07-10077), July 8-13, 2012, Lake Biwa, Japan.<\/li>\n
  6. Guo, L<\/strong>. 2012. Applications of UV-visible and fluorescence spectroscopy techniques to characterizing size and composition of dissolved organic matter.\u00a0 Presentation in the 9th<\/sup> cross-strait marine science conference (Abstract #TC10, pp17-18), Aug 30-Sept 2, 2012, Wuyishan, China.<\/li>\n
  7. Stolpe, B., D. Lapworth, J. Lead, L. Guo<\/strong>, A.M. Shiller and\u00a0 C. Gooddy. 2012. Iron-rich nanoparticle formation and importance for trace metal transport in ground water and rivers. Frontiers Meeting in 2012: Nanogeoscience, December 10, 2012, UK.<\/li>\n
  8. Guo, L<\/strong>., Yang, W. Chuang, C.Y. and Santschi, P. 2012. Fractionation of 210<\/sup>Pb, 210<\/sup>Po and 7<\/sup>Be during their interactions with inorganic and organic nanoparticles in seawater. Presentation at the 2012 AGU Fall Meeting, San Francisco, CA, December 3-7, 2012, Abstract # OS41A-1686.<\/li>\n
  9. Guo, L<\/strong>., Zhou, Z. and Shiller, A.M. 2013. Evaluating the fate, transport and degradation state of oil in the Gulf of Mexico using fluorescent oil component ratios. Presentation at the 2013 Gulf of Mexico Oil Spill & Ecosystem Science Conference, January 21-23, 2013, New Orleans, LA.<\/li>\n
  10. Cherry, M. and Guo, L<\/strong>. 2013. Variations in the concentration and composition of dissolved organic matter in Lake Michigan.\u00a0 Presentation at the 2013 ASLO Aquatic Sciences Meeting, February 17-22, 2013, New Orleans, Louisiana (abstract # 10459).<\/li>\n
  11. Cai, Y., Shim, M., Guo, L<\/strong>. and Shiller, A.M. 2013. Floodplain influence on carbon speciation and export from the lower Pearl River, Mississippi, Presentation at the 2013 ASLO Aquatic Sciences Meeting, February 17-22, 2013, New Orleans, Louisiana.<\/li>\n
  12. Guo, L<\/strong>., Lin, P., Chen, M., and Cai, Y. 2013. Distributions, partitioning and mixing behavior of phosphorus species in the Jiulong River estuary. Presentation at the 2013 ASLO Aquatic Sciences Meeting, February 17-22, 2013, New Orleans, Louisiana (abstract # 10720).<\/li>\n
  13. Zhou, Z. and Guo, L<\/strong>. 2013. Characterization of dissolved organic matter in the southwest Lake Michigan. Poster presentation at the NSF sponsored workshop, \u201cChanges in the Biogeochemistry of the Great Lakes System\u201d. March 11-13, 2013, Wayne State University, Detroit, MI.<\/li>\n
  14. Gao, L. and L. Guo<\/strong>. 2013. Variations in dissolved and colloidal organic nitrogen along the river-lake interface in Lake Michigan. Presentation at the 2013 Gordon Research Conferences in Chemical Oceanography, University of New England in Biddeford ME, August 4-9, 2013.<\/li>\n
  15. Zhou, Z. and L. Guo<\/strong>. 2013. Colloidal size distribution of dissolved organic matter in riverine, estuarine and coastal waters as characterized by flow field-flow fractionation. Presentation at the 2013 Gordon Research Conferences in Chemical Oceanography, University of New England in Biddeford ME, August 4-9, 2013.<\/li>\n
  16. Gao, L., Zhou, Z. and Guo L<\/strong>. 2013. Dynamics of inorganic and organic nitrogen at the river-lake interface in southwest Lake Michigan. Abstract\/presentation at the State of Lake Michigan and Great Lake Beach Association Joint Conference, Sheboygan, WI, Oct. 15 – 17, 2013.<\/li>\n
  17. Lin, P. and Guo, L<\/strong>. 2013. Spatial variations in chemical speciation of phosphorus across the river-lake interface in southwest Lake Michigan. Abstract\/presentation at the State of Lake Michigan and Great Lake Beach Association Joint Conference, Sheboygan, WI, Oct. 15 – 17, 2013.<\/li>\n
  18. Zhou, Z. and Guo, L<\/strong>. 2013. Source and composition of dissolved organic matter in southwest Lake Michigan as characterized by fluorescence EEM and PARAFAC techniques. Abstract\/presentation at the State of Lake Michigan and Great Lake Beach Association Joint Conference, Sheboygan, WI, Oct. 15 – 17, 2013.<\/li>\n
  19. Gao, L. and L. Guo. 2013. Chemical speciation and transformation of dissolved nitrogen in Lake Michigan. Presentation at the 2013 AGU Fall Meeting, San Francisco, CA, December 9-13, 2013. Abstract # OS23A-1649.<\/li>\n
  20. Guo, L. 2013. A comparative study on riverine DOC export fluxes from the Mississippi River and Pearl River. Invited presentation at the 2013 AGU Fall Meeting, Session OS-005, San Francisco, CA, December 9-13, 2013 (abstract #OS51C-03<\/a>).<\/li>\n
  21. Guo, L. 2014. Composition and export fluxes of dissolved organic matter from the Mississippi and Pearl Rivers: a comparative study. The First Xiamen Symposium on Marine Environmental Sciences, Xiamen, China, Jan 9-11, 2014.<\/li>\n
  22. Guo, L. P. Lin and M. Chen. 2014. Adsorption and fractionation of thorium and protactinium on nanoparticles in seawater. 2014 Ocean Science Meeting, February 23-28, Honolulu, HI.<\/li>\n
  23. Bianchi, TS, C. Osburn, S. Yvon-Lewis, M. Shields, J. Young, L. Guo and Z. Zhou. 2014. Deep Water Horizon Oil in Gulf of Mexico Waters after Two Years:\u00a0Transformation into the Dissolved Organic Matter Pool.\u00a0 2014 Gulf of Mexico Oil Spill and Ecosystem Sciences Conference, February 26-29, Mobile Alabama.<\/li>\n
  24. Zhou, Z. and Guo, L. 2014.\u00a0 Colloidal size distribution of dissolved organic matter in soil leacheate and Milwaukee River waters as characterized by flow-field flow fractionation. Joint Aquatic Sciences Meeting to be held 18-23 May 2014 in Portland, Oregon, USA.<\/strong><\/li>\n
  25. Lin, P and Guo, L. 2014. Variations in dissolved and particulate carbohydrate species across the river-lake interface in southwest Lake Michigan. 2014 Goldschmidt Geochemical Conference, June 8-13, 2014, Sacramento, CA.<\/li>\n
  26. Zhou, Z. and Guo, L. 2014. Colloidal size partitioning in estuarine and coastal waters as characterized by flow field-flow fractionation coupled with fluorescence detector. 2014 Goldschmidt Geochemical Conference, June 8-13, 2014, Sacramento, CA.<\/li>\n
  27. Ni, J. Guo, L., Lin, P., Zhen, Y., and Yao, X. 2014.\u00a0 Distribution and chemical speciation of phosphorus in surface sediments of the central Pacific Ocean. 2014 Goldschmidt Geochemical Conference, June 8-13, 2014, Sacramento, CA.<\/li>\n
  28. Guo, L. 2015. Colloidal size distribution of dissolved organic matter in Stain Louis Bay estuary as characterized by flow field-flow fractionation. The 2nd Xiamen Symposium on Marine Environmental Sciences, Xiamen, China, Jan 7-10, 2015.<\/li>\n
  29. Guo, L.\u00a0 Tracking the fate of oil in the Gulf of Mexico.\u00a0 Keynote presentation at the 2015 Lake Sturgeon Bowl annual competition.\u00a0 Milwaukee, January 30, 2015.<\/li>\n
  30. Guo, L. and P. Lin. 2015. Abundance, speciation and distribution of dissolved carbohydrates in the northern Gulf of Mexico influenced by oil spill. Presentation at the 2015 ASLO Aquatic Sciences Meeting, Granada, Spain, February 22-27, 2015 (abstract #27456).<\/li>\n
  31. Devilbiss, S., Zhou, Z., Klump. J.V. and Guo, L. 2015.\u00a0 Characterization of bulk and chromophoric dissolved organic matter in Green Bay, Lake Michigan. 2015 Society for Freshwater Science Annual Meeting, Milwaukee, May 17-21, 2015.<\/li>\n
  32. Guo L. Zhou, Z., and E. Minor. 2015. Characterization of dissolved organic matter in the Laurentian Great Lakes using fluorescence EEM and PARAFAC techniques. The 2015 Society for Freshwater Science Annual Meeting, Milwaukee, May 17-21, 2015.<\/li>\n
  33. Lin, P., Klump, J.V., Guo, L. 2015. Chemical speciation of phosphorus in the water column and sediment in Green Bay.\u00a0 The Society for Freshwater Science Annual Meeting, Milwaukee, May 17-21, 2015.<\/li>\n
  34. Teber, T., SE. DeVilbiss, Z. Zhou, P. Lin, and L. Guo. 2015.\u00a0 Composition and flux of dissolved organic matter from the lower Milwaukee River.\u00a0 The Society for Freshwater Science Annual Meeting, Milwaukee, May 17-21, 2015.<\/li>\n
  35. Kteeba, S. Zhou, Z. and Guo, L. 2015. Optical and size characterization of soil dissolved organic matter. The Society for Freshwater Science Annual Meeting, Milwaukee, May 17-21, 2015.<\/li>\n
  36. Zhou, Z. and Guo, L. 2015. Variations in composition and size of dissolved organic matter across the river-lake interface in southwest Lake Michigan. The Society for Freshwater Science Annual Meeting, Milwaukee, May 17-21, 2015.<\/li>\n
  37. Guo, L., Gao, L., Zhou, Z., and Reyes, A. 2015. Characterization of soil-derived dissolved organic matter from permafrost in northern Alaska. AGU Fall Meeting presentation, December 12-16, 2015.<\/li>\n
  38. Guo, L., DeVilbiss, S., Zhou, Z., and Klump, J.V. 2016. Variations in abundance, composition and sources of dissolved organic matter in Green Bay, Lake Michigan. Abstract # CT54A-0267. 2016 Ocean Science Meeting, Feb 22-26, 2016, New Orleans.<\/li>\n
  39. Lin, P., Klump, J.V. and Guo, L. 2016. Air-water CO2<\/sub> fluxes in seasonal hypoxia-influenced Green Bay, Lake Michigan. Abstract# AH44A-0084. 2016 Ocean Science Meeting, Feb 22-26, 2016, New Orleans.<\/li>\n
  40. Zhou, Z., Redalje, D., Howden, S. and Guo, L. 2016. Spatiotemporal variations in chromophoric dissolved organic matter\u00a0in the Saint Louis Bay, northern Gulf of Mexico. 2016 Ocean Science Meeting, Abstract # CT44A-0205. Feb 22-26, 2016, New Orleans.<\/li>\n
  41. Teber, T., Lin, P. and Guo, L. 2016. Speciation, seasonal variations and export fluxes of nutrients from the urbanized lower Milwaukee River.\u00a0 Wisconsin Wetlands Association Annual Meeting, Feb 23-25, 2016, Green Bay, WI.<\/li>\n
  42. Keteeba, S., Svoboda, T., and Guo, L. 2016.\u00a0 Toxicity of ZnO nanoparticles to zebrafish (embryos) in the presence of natural organic matter. ASLO 2016 Summer Meeting (Abstract ID: 28133<\/a>), June 5-10, 2016, Santa Fe, NM.<\/li>\n
  43. DeVilbiss, S. and Guo, L. 2016. Characterization and yields of nutrients and organic matter excreted from invasive quagga mussels in Lake Michigan. ASLO 2016 Summer Meeting, Abstract ID: 28069<\/a>. June 5-10, 2016, Santa Fe, NM.<\/li>\n
  44. Guo, L<\/strong> and Zhou, Z. 2016. Characterization of dissolved and colloidal organic matter in Lake Michigan using fluorescence EEMs and flow field-flow fractionation. 2016 Goldschmidt Meeting, June 26-July 1, 2016, Yokohama, Japan (Keynote talk).<\/li>\n
  45. He, H., Guo, L., and Zhang J. 2016. Variations of carbon and nutrient species along a salinity gradient in the Mississippi Sound\/ Bight in the northern Gulf of Mexico. AOGS 2016 Meeting, July 31-Aug 5, 2016, Beijing, China.<\/li>\n
  46. Guo, L., Lin, P. and Klump, J.V. 2016.\u00a0 Chemical speciation and transformation of phosphorus between dissolved and particulate phases in seasonally hypoxia-influenced Green Bay, Lake Michigan. AOGS 2016 Meeting, July 31-Aug 5, 2016, Beijing, China.<\/li>\n
  47. Guo, L. 2017. Changes in carbon and nutrient dynamics in the Laurentian Great Lakes in a changing ecosystem. AGU Chapman Conference on Extreme Climate Event Impacts on Aquatic Biogeochemical Cycles and Fluxes. 22-27 January 2017, San Juan, Puerto Rico, USA (abstract ID: 202895).<\/li>\n
  48. Guo, L. 2017. Evaluating molecular-size dependent heterogeneity of dissolved organic matter (invited talk). Workshop on Marine Chemistry Frontiers, Ocean University of China, April 25th<\/sup>, 2017.<\/li>\n
  49. Guo, L<\/strong>. 2017. Simultaneous separation and characterization of dissolved organic matter in aquatic systems. Invited talk, Frontiers in Earth Science and The 2017 IPACES annual meeting, Shenzhen, July 1-2, 2017.<\/li>\n
  50. Guo, L<\/strong>. 2017. Size and chemical characterization of heterogeneous dissolved organic matter (Invited). The XI symposium in Marine Sciences, August 21-24, 2017, Taian, China.<\/li>\n
  51. Guo L<\/strong>. and Lin, H. Optical and size characterization of dissolved organic matter from the lower Yukon River. 2017 AGU Fall Meeting, December 11-15, 2017, New Orleans, LA. Abstract# 266361.<\/li>\n
  52. Guo L<\/strong>. and Xu, H. 2018. Degradation and transformation of dissolved organic matter affected by size and composition. 2018 Ocean Science Meeting, February 11-16, 2018, Portland, OR, Abstract #: CT44A-1343.<\/li>\n
  53. Lin, H., Joung, D.J., Kessler, J., and Guo, L<\/strong>. 2018. Composition and size-distribution of dissolved organic matter in the two largest Great Lakes: Lakes Superior and Michigan. 2018 Ocean Science Meeting, February 11-16, 2018, Portland, OR, Abstract#: CT24B-1316.<\/li>\n
  54. O\u2019Connor, J., Guo, L<\/strong>., and Liu, Z. 2018. Using a unique thermal slice pyrolysis gas chromatography\/mass spectrometry (Py-GC\/MS) technique to reveal chemical structures of DOM from nine North American Rivers. 2018 Ocean Science Meeting, February 11-16, 2018, Portland, OR, Abstract#: CT41A-03.<\/li>\n
  55. Yuan F., Mayer, B. and Guo, L<\/strong>. 2018. Contrasting nearshore and offshore responses to the tributary inputs of carbon and sulfur into Lake Erie.\u00a0 2018 AGU Fall Meeting, December 10-14, 2018. Washington DC (Abstract #: H13K-1894).<\/li>\n
  56. Guo, L<\/strong>. and Lin, H. 2019. Molecular size distribution and size-dependent composition of a single DOM sample as characterized using FlFFF-EEM-PARAFAC coupling techniques. The fourth Xiamen Symposium on Marine Environmental Sciences, January 6-9 (8), 2019. Xiamen, China.<\/li>\n
  57. Guo, L. 2019. Dynamic changes in molecular-size and composition of DOM in marine environments. Invited seminar at Seoul National University. January 22, 2019, Seoul South Korea.<\/li>\n
  58. Guo, L. 2019. A new FlFFF-EEM-PARAFAC coupling technique for elucidating molecular size-dependent DOM composition of individual samples. Invited seminar at Hanyang University, January 24, 2019.\u00a0 South Korea.<\/li>\n
  59. Guo, L. 2019. Changing phosphorus cycling induced by invasive species (quagga mussels) and hypoxia. Invited seminar at Institute of Hydrobiology, Chinese Academy of Science, April 25, 2019, Wuhan, China.<\/li>\n
  60. Guo, L. 2019.\u00a0 Changing carbon cycle in Lake Michigan. Invited seminar at Wuhan Botany Garden, Chinese Academy of Science, April 26, 2019, Wuhan, China.<\/li>\n
  61. Guo, L. 2019. Importance of the composition and molecular size of natural dissolved organic matter in governing environmental and biogeochemical processes. Keynote\/Plenary Address, The 5th International Water Industry Conference 2019, Daegu, South Korea (September 3-6, 2019).<\/li>\n
  62. Lin, H. and Guo, L. 2020. Variations in size and fluorescent components of dissolved organic matter in a negative estuary. 2020 Ocean Science Meeting, February 16-21, 2020, San Diego, CA. (Abstract#: CT44B-1005).<\/li>\n
  63. Liu, Z., J O’Connor, K Lu, L Guo. 2020.\u00a0 Characterizing dissolved organic matter by thermal slicing ramped pyrolysis gas chromatography mass spectrometry. 2020 Ocean Science Meeting, February 16-21, 2020, San Diego, CA. (abstract#: CT34A-0956).<\/li>\n
  64. Guo, L., Lin, H., Miller, T., and Newton, R. 2021. Response of dissolved organic matter dynamics to algal blooms in a coastal eutrophic lagoon in Lake Michigan. 2021 ASLO Aquatic Science Meeting (Virtual), June 22-27, 2021. Abstract #3362.<\/li>\n
  65. Lin, H., Xu, H., Cai, Y., Belzile, C., Macdonald, R. and Guo, L. 2021. Dynamic changes in size-fractionated DOM composition in the seasonally ice-covered Yukon River as characterized using EEM-PARAFAC, FT-IR and data fusion. 2021 ASLO Aquatic Science Meeting (Virtual), June 22-27, 2021. Special Session SS80, Abstract # xxxx.<\/li>\n
  66. Lu, K., Xue, J., Guo, L., and Liu, Z. 2021. Comparing aquatic dissolved organic matter isolated from ultrafiltration vs. solid phase extraction using advanced analytical instrumentation. 2021 ASLO Aquatic Science Meeting (Virtual), June 22-27, 2021. Special Session SS80, Abstract # xxxx.<\/li>\n
  67. Lu, K., Xue, J., Guo, L<\/strong>. and Liu Z. 2022. Characterization of dissolved organic matter from river to coastal waters using multi-dimensional molecular analyses. 2022 Ocean Science Meeting. 28 February-4 March 2022, Hawaii<\/li>\n
  68. Yuan, F., Mayer, B. and Guo, L<\/strong>. 2022. Chemical and isotopic constraints on carbon and sulfur dynamics in Lake Erie nearshore waters (Abstract ID: 8848). July 2022. Goldschmidt 2022, Hawaii.<\/li>\n
  69. Patel, P., Kteeba, S.M. and Guo, L<\/strong>. 2022. Spectroscopic analysis of chromophoric dissolved organic matter (CDOM) in natural waters. Poster presentation at the Symposium of the 2022 ACS Project-SEED Program. Bader Headquarter, Milwaukee. August 5th, 2022.<\/li>\n
  70. Guo, L.<\/strong>, Lin, P., Klump, J.V., Bartlett, S,L. and Robertson, D.M. 2023. Chemical speciation, transformation, and deposition of phosphorus in Green Bay, Lake Michigan. Phosphorus: Lessons from 10+ Years of Numeric Standards for Wisconsin Waters. February 7, 2023, Monona Terrace, Madison<\/li>\n
  71. Gibbs, S.J., Kteeba, S.M. and Guo, L<\/strong>. Photochemical degradation of disposable face masks and polypropylene in the environment. Presentation at the 15th Annual 51ÁÔÆæ Undergraduate Research Symposium. April 28th, 2023.<\/li>\n
  72. Guo, L<\/strong>., Lin, P., Klump, J.V. 2023. Fluxes and transformation of sedimentary phosphorus in Green Bay, a hypereutrophic freshwater estuary. Goldschmidt 2023 Conference, 9-14 July, Lyon France. Abstract # 17050. https:\/\/doi.org\/10.7185\/gold2023.17050<\/a><\/li>\n
  73. Thao, N. Kteeba, S.M. and Guo, L<\/strong>. 2023. Effects of pH and ionic strength on the optical and colloidal properties of natural DOM and plastic derived DOM. Poster presentation at the Symposium of the 2023 ACS Project-SEED Program, 51ÁÔÆæ. August 11, 2023.<\/li>\n
  74. Schutte, M.P., Kteeba, S.M. and Guo, L.<\/strong> Yields, characterization and photochemical reactivity of water-soluble dissolved organic matter from microplastics and microfibers. 2023 ACS Fall Meeting, August 13-17, 2023. San Francisco, CA (Abstract ID: 3908504).<\/li>\n
  75. Kteeba, S.M. and Guo, L.<\/strong> Photochemical behavior and degradation products of microfibers in freshwater environments. 2023 ACS Fall Meeting, August 13-17, 2023. San Francisco, CA (Abstract ID: 3920637).<\/li>\n
  76. Sollberger, M., Weidert, D., Kteeba, S.M. and Guo, L<\/strong>. 2023. Evaluating the photochemical degradation of biodegradable plastics. Poster presentation at the annual UR@51ÁÔÆæ symposium. University of Wisconsin-Milwaukee, Milwaukee, August 4, 2023.<\/li>\n
  77. Guo, L<\/strong>., Gibbs, S., and Kteeba, S.M. 2023. Photochemical Reactivity of Disposable Face Masks and Polypropylene in aquatic environments. The 2023 AGU Fall Meeting, San Francisco, CA , December 11-15, 2023 (abstract ID: 1414866 or paper#: H53R-1562).<\/li>\n
  78. Choi, J., Kteeba, S.M., Swigart, J.M. and Guo, L<\/strong>. 2024. Chemical and Optical Characterization of Produced Water from the Permian Basin Oil Field. Presentation at the NCUR 2024 Conference, April 8-10, 2024. California State University, Long Beach, CA.<\/li>\n
  79. Gibbs, S., Kteeba, S.M., and Guo, L<\/strong>. 2024. Characterization of dissolved organic matter of Disposable Face Masks during photochemical weathering in Freshwater environments. Presentation at the NCUR 2024 Conference, April 8-10, 2024. California State University, Long Beach, CA.<\/li>\n
  80. Wilson, B., Krueger, S.J., Kteeba, S.M and Guo, L<\/strong>. 2024. Characterization of microplastic-derived dissolved organic matter (DOM) and its interactions with PFAS in aquatic environments. Presentation at 2024 Freshwater@UW Summer Research Symposium, Madison, Wisconsin, August 1, 2024.<\/li>\n
  81. Thao, N., Krueger, S.J., Kteeba, S.M and Guo, L<\/strong>. 2024. Impact on photodegradation and thermal leaching on chemical properties of plastics-derived dissolved organic matter (DOM). Symposium of the 2024 ACS Project-SEED Program at 51ÁÔÆæ, August 7, 2024.<\/li>\n
  82. Kteeba, S.M. and Guo, L<\/strong>. 2024. Chemical and optical characterization of dissolved organic matter released from Disposable Face Masks under UV-irradiation. Oral presentation at the 2024 ACS Fall Meeting, August 18-22, 2024. Denver, CO (Abstract ID: 4106647).<\/li>\n
  83. Kteeba, S.M., Krueger, S.J. and Guo, L<\/strong>. 2024. PFAS binding to dissolved organic matter released from microplastics. Presentation at the 2024 ACS Fall Meeting, August 18-22, 2024. Denver, CO (Abstract<\/a> ID: 4109564).<\/li>\n
  84. Guo, L<\/strong>., Lin, P. and Klump, J.V. 2024. Isotopic composition, spatial distributions, and depositional history of total organic carbon and black carbon in Green Bay, Lake Michigan. 2024 AGU Fall Meeting, December 9-13, 2024, Washington DC. Abstract # 1597370.<\/li>\n
  85. Carlson, M., Kteeba, S.M., Krueger, S.J., Guo, L<\/strong>. Influence of chlorine on the release of DOM from PVC microplastics under different leaching conditions. Presentation at the 17th Annual 51ÁÔÆæ Undergraduate Research Symposium. April 25th, 2024.<\/li>\n
  86. Suchomel, K.J., Kteeba, S.M., Krueger, S.J., Guo, L<\/strong>. Size Fractionation and Characterization of Microplastic-Derived Dissolved Organic Matter Using Ultrafiltration and Spectroscopic Techniques. Presentation at the 17th Annual 51ÁÔÆæ Undergraduate Research Symposium. April 25th, 2024.<\/li>\n
  87. Krueger, S.J. and Guo, L<\/strong>. 2025. Spatial and vertical variations in heavy metal concentrations in Green Bay sediments. Presentation at the SFS 2025 Society for Freshwater Science Annual Meeting, May 18-22, 2025. San Juan, PR.<\/li>\n
  88. Krueger, S.J., Wahl, T., Klump, J.V., and Guo, L<\/strong>. 2025. Pollution history of toxic metals and metalloids in the Bay of Green Bay sediments. Proceedings of the 68th IAGLR Conference, Milwaukee, June 2-6, 2025, Page-103.<\/li>\n
  89. Kteeba, S.M., Krueger, S.J., Guo, L<\/strong>. 2025. Impacts of Leaching Methods on the Chemical Properties of Dissolved Organic Matter released from PVC Microplastics. Proceedings of the 68th IAGLR Conference, Milwaukee, June 2-6, 2025 (page-103).<\/li>\n
  90. Guo, L<\/strong>., Kteeba, S.M., Krueger, S.J. 2025. Variations of PFAS in Milwaukee estuary sediments: insights into contamination history and sources. Proceedings of the 68th IAGLR Conference, Milwaukee, June 2-6, 2025 (Page-61).<\/li>\n
  91. Krueger, S.J., Zhang, W., Kteeba, S.M., Wang, Y. and Guo, L<\/strong>. 2025. Partitioning of PFAS between dissolved and colloidal phases in freshwater environment<\/em>s<\/em>. Proceedings of the 68th IAGLR Conference, Milwaukee, June 2-6, 2025 (p-213).<\/li>\n
  92. Krueger, S.J., Kteeba, S.M., and Guo, L<\/strong>. 2025. Chemical Characterization of Dissolved Organic Matter Released from Biodegradable Polyhydroxyalkanoate Microplastic Presentation at the ACS Great Lakes Region Meeting, June 4-6, 2025. Appleton, Wisconsin.<\/li>\n
  93. Guo, L<\/strong>., Kteeba, S.M., Krueger, S.J., and Gorski, P.R. 2025. Depositional history of PFAS in the bay of Green Bay in Lake Michigan over the last 80 years. Presentation at the 2025 Goldschmidt Meeting, 6-11 July 2025, Prague, Czech Republic.<\/li>\n
  94. Fox-Kincaid, M., Kteeba, S.M., Krueger, S.J., Sajid, R. and Guo, L. 2025. Influence of pH and Leaching Conditions on the Chemical Composition of Microplastic-Derived Dissolved Organic Matter. Presentation at the 2025 FW@UW Summer Research Symposium, Madison, WI, August 1, 2025.<\/li>\n
  95. Sajid, R., Kteeba, S.M., Krueger, S.J., Fox-Kincaid, M. and Guo, L. 2025. Variations in chemical composition of DOM released from polyester and PVC microplastics under different pH and leaching conditions. Presentation at symposium of the 2025 ACS Project-SEED Program at 51ÁÔÆæ, August 8, 2025.<\/li>\n
  96. Kteeba, S.M., Krueger, S.J., Guo, L<\/strong>. 2025. Yields and characterization of microplastic-derived dissolved organic matter from different polymers under varying leaching conditions. The 2025 ACS Fall Meeting, August 17-21, 2025. Washington DC. (Abstract ID: 4325817)<\/li>\n
  97. Zhang, W., Krueger, S.M., Wang, Y. and Guo, L<\/strong>. 2025. Ultrafiltration permeation behavior and partitioning of PFAS between dissolved and colloidal phases. The 2025 ACS Fall Meeting<\/u>, August 17-21, 2025. Washington DC. (abstract# 4326971).<\/li>\n
  98. Krueger, S. and Guo<\/strong>, L. 2025. Pollution history of toxic metals, black carbon (soot), and PFAS in Green Bay and Milwaukee Harbor over the past 50-100 years. Invited presentation at SFS Colloquium. Oct-06, 2025.<\/li>\n
  99. Carlson, M., Winston, G., Lehman, J.P., Krueger, S.J., Guo, L<\/strong>. 2026. Photochemical fate of 6PPD and 6PPD-quinone in aquatic environments. Presentation at the 2026 ACS Fall Meeting, August 23-27, 2026. Chicago, IL (abstract# 4533000).<\/li>\n
  100. Krueger, S.J., Hart, M., Cisco, J, Kteeba, S.M., Lenhart, J.J., Liu, Z., and Guo, L<\/strong>. 2026. Production of nanoplastics under mechanical and photochemical aging of microplastics with different polymers. Presentation at the 2026 ACS Fall Meeting, August 23-27, 2026. Chicago, IL (abstract# 4540178).<\/li>\n
  101. Zhang, W., Krueger, S.J., Yin, Wang, and Guo, L<\/strong>. 2026. Occurrence of colloidal PFAS in natural waters as characterized with ultrafiltration. Presentation at the 2026 ACS Fall Meeting, August 23-27, 2026. Chicago, IL.<\/li>\n<\/ol>\n\n\n\n\n\n\n\n
    \"slide06\"<\/a><\/td>\n\"slide07\"<\/a><\/td>\n\"slide01\"<\/a><\/td>\n<\/tr>\n
    \u00a0City of Milwaukee (a view from Lake Michigan)<\/td>\n\u00a0Milwaukee Harbor<\/td>\n\u00a0City of Milwaukee (2016)<\/td>\n<\/tr>\n
    <\/td>\n<\/td>\n<\/td>\n<\/tr>\n
    <\/td>\n<\/td>\n<\/td>\n<\/tr>\n
    <\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n
    \"\"<\/td>\n\"slide3\"<\/a><\/td>\n\"slide4\"<\/a><\/td>\n\"slide5\"<\/a><\/td>\n<\/tr>\n
    Spring<\/td>\nSummer<\/td>\nFall<\/td>\nWinter<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n
    \"\"<\/a><\/td>\n\"\"<\/a><\/td>\n\"\"<\/a><\/td>\n\"\"<\/a><\/td>\n<\/tr>\n
    Milwaukee Art Museum<\/td>\nAutumn moon<\/td>\nAutumn scenic<\/td>\nMilwaukee Beach<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

     <\/p>\n

     <\/p>\n","protected":false},"excerpt":{"rendered":"

    Conference presentations\/Invited seminars (since jointed 51ÁÔÆæ in 2012): Zhou, Z., Guo, L. and He, H. 2012. UV and fluorescence characteristics of DOM from the Gulf of Mexico five months after the Deep-water Horizon oil spill. 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