Research

 

Data and/or presentations/publications in Guo’s recent research projects:

Degradation Products and Changes in Colloidal Properties of Microplastics/Microfibers During Photochemical Weathering (2022-2025, PI, supported by National Science Foundation / Division of Chemistry, project #2204145)
  • Kteeba, S.M., and Guo, L. 2025. UV-induced release and characterization of dissolved organic matter from disposable face mask layers and polypropylene. Journal of Hazardous Materials, 496: 139438. https://doi.org/10.1016/j.jhazmat.2025.139438
  • Kteeba, S.M., Krueger, S.J., Guo, L. 2025. Impacts of Leaching Methods on the Chemical Properties of Dissolved Organic Matter released from PVC Microplastics. Presentation at the 68th IAGLR Conference, Milwaukee, June 2-6, 2025.
  • Kteeba, S.M. and Guo, L. 2024. Photodegradation processes and weathering products of microfibers in aquatic environments. Environ. Sci. Technol. 58 (37), 16535–16546. https://doi.org/10.1021/acs.est.4c03667
  • Kteeba, S.M., Guo, L.* 2024. PFAS binding to dissolved organic matter released from microplastics. Presentation at the 2024 ACS Fall Meeting, August 18-22, 2024. Denver, CO (Abstract ID: 4109564)
  • Kteeba, S.M. and Guo, L. 2024. Chemical and optical characterization of dissolved organic matter released from Disposable Face Masks under UV-irradiation. Presentation at the 2024 ACS Fall Meeting, August 18-22, 2024. Denver, CO (Abstract ID: 4106647).
  • Thao, N., Krueger, S.J., Kteeba, S.M and Guo, L. 2024. Impact on photodegradation and thermal leaching on chemical properties of plastics-derived dissolved organic matter (DOM). Poster presentation at Symposium of the 2024 ACS Project-SEED Program, University of Wisconsin-Milwaukee, August 7, 2024.
  • Wilson, B., Krueger, S.J., Kteeba, S.M and Guo, L. 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.
  • Schutte, M.M., Kteeba, S.M. and Guo, L. 2024. Photochemical reactivity of water-soluble dissolved organic matter derived from microplastics and microfibers. Science of the Total Environment, 911, 168616 https://doi.org/10.1016/j.scitotenv.2023.168616
  • Grewal, R., Guo, L., and Scanlan, M.K. 2024. Lead water pipes created a health disaster in Flint, but replacing them with cheap PVC plastic – as many cities are doing – carries hidden costs. The Conversation International. June-25, 2024. (See this link for the article)
  • Guo, L., 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).
  • Ahmed, A.S.S., Billah, M.M., Mohammad Ali, M, Bhuiyan, M.K.A., Guo, L., Mohinuzzaman, M., Hossain, M.B., Rahman, M.S., Islam, M.S., Yan, M. and Cai, W. 2023. Microplastics in aquatic environments: A comprehensive review of toxicity, removal, and remediation strategies. Science of the Total Environment, 876, 162414. https://doi.org/10.1016/j.scitotenv.2023.162414.
  • Gibbs, S.J., Kteeba, S.M. and Guo, L. Photochemical degradation of disposable face masks and polypropylene in the environment. Presentation at the 15th Annual UWM Undergraduate Research Symposium. April 28th, 2023.
  • Schutte, M.P., Kteeba, S.M. and Guo, L. 2023. Yields, characterization and photochemical reactivity of water-soluble dissolved organic matter from microplastics and microfibers. Oral presentation at the 2023 ACS Fall Meeting, August 13-17, 2023. San Francisco, CA (Abstract ID: 3908504).
  • Kteeba, S.M. and Guo, L. 2023. Photochemical behavior and degradation products of microfibers in freshwater environments. Oral presentation at the 2023 ACS Fall Meeting, August 13-17, 2023. San Francisco, CA (Abstract ID: 3920637).
Sources and deposition of phosphorus in Lake Michigan (2020-2024, PI, supported by UWM’s Discovery and Innovation Grant Program)
  • Krueger, S.J., Wahl, T., Klump, J.V., and Guo, L. 2025. Deposition of toxic metals and sedimentary organic carbon in Green Bay, Lake Michigan. Presentation at the 68th IAGLR Conference, Milwaukee, June 2-6, 2025.
  • Guo, L., 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.
  • Zhou, Z, Lin, H., D’Sa, E.J., and Guo, L. 2024. A comparative study of optical and size properties of dissolved organic matter in the lower Mississippi River and Pearl River. Mar. Chem. 267, 104453. https://doi.org/10.1016/j.marchem.2024.104453
  • Lin, P., Klump, J.V., and Guo, L. 2024. Chemical speciation, reactivity and long-term burial of sedimentary phosphorus in a seasonally hypoxia-influenced freshwater estuary. Sci. Tot. Environ., 948, 174957. https://doi.org/10.1016/j.scitotenv.2024.174957
  • Yang, B., Lin, H., Bartlett, S.L., Houghton, E.M., Robertson, D.M. and Guo, L. 2021. Partitioning and transformation of organic and inorganic phosphorus among dissolved, colloidal and particulate phases in a hypereutrophic freshwater estuary. Water Research, 196, 117025. https://doi.org/10.1016/j.watres.2021.117025.
  • Guo, L., 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.
  • Guo, L., 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 WI.
  • Lin, H., Bartlett, S.L. and Guo, L. 2023. Distinct variations in fluorescent DOM components along a trophic gradient in the lower Fox River-Green Bay as characterized using one-sample PARAFAC approach. Science of the Total Environment, 902: 165891. https://doi.org/10.1016/j.scitotenv.2023.165891
  • Yuan, F., DiBiasio, E., Mayer, B. and Guo, L. 2023. Chemical and isotopic constraints on carbon and sulfur dynamics in Lake Erie nearshore waters. Journal of Great Lakes Research. https://doi.org/10.1016/j.jglr.2023.07.005
  • Lin, P., Klump, J.V., and Guo, L. 2023. Chemical speciation, reactivity and long-term burial of sedimentary phosphorus in a seasonally hypoxia-influenced freshwater estuary. (submitted).
Role of Dissolved Organic Matter in Regulating the Sorption of Per- and Polyfluoroalkyl Substances (PFAS) by Engineered Adsorbents (2022-2024, Co-PI with Drs. Y. Wang and S. Xu, supported by UWM’s Discovery and Innovation Grant program)
  • Ryan, D., Baldus, C., Samuels, M., Kteeba, S.M., Dong, Q., Wang, Y., Guo, L., Mayer, B., and McNamara, P. 2025. Peroxi-electrocoagulation for PFAS mitigation: The impact of water quality and dissolved organic matter on removal pathways. ACS ES&T Engineering,(submitted).
  • Krueger, S.J., Zhang, W., Kteeba, S.M., Wang, Y. and Guo, L. 2025. Partitioning of PFAS between dissolved and colloidal phases in freshwater environments. Presentation at the 68th IAGLR Conference, Milwaukee, June 2-6, 2025.
  • Kteeba, S.M., Guo, L.* 2024. PFAS binding to dissolved organic matter released from microplastics. Presentation at the 2024 ACS Fall Meeting, August 18-22, 2024. Denver, CO (Abstract ID: 4109564)
  • Li, D., Lin, H. and Guo, L. 2023. Comparison of molecular weight distributions and size-dependent optical properties among model and reference natural dissolved organic matter. Environ. Sci. Poll. Res.,  30, 57638–57652.  https://doi.org/10.1007/s11356-023-26398-3
  • Lin, H., Bartlett, S.L. and Guo, L. 2023. Distinct variations in fluorescent DOM components along a trophic gradient in the lower Fox River-Green Bay as characterized using one-sample PARAFAC approach. Science of the Total Environment, 902: 165891. https://doi.org/10.1016/j.scitotenv.2023.165891

 

Micro- and nano-plastics as vectors for the transport of organic contaminants in freshwater environments (2020-2022, PI, with Co-PI Prof. Joel Pedersen, Supported by Freshwater Collaborative of Wisconsin)
  • Kteeba, S.M., Guo, L.* 2024. PFAS binding to dissolved organic matter released from microplastics. Presentation at the 2024 ACS Fall Meeting, August 18-22, 2024. Denver, CO (Abstract ID: 4109564)
  • Wilson, B., Krueger, S.J., Kteeba, S.M and Guo, L. 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.
  • Schutte, M. 2022. Investigating Microplastics Size Distribution and Fate in Aquatic Environments. Presentation at the Fall 2022 Internship Symposium, December 15, 2022.
  • Gibbs, S.J., Kteeba, S.M. and Guo, L. 2023. Photochemical degradation of disposable face masks and polypropylene in the environment. Presentation at the 15th Annual UWM Undergraduate Research Symposium. April 28th, 2023.
  • Sollberger, M., Weidert, D., Kteeba, S.M. and Guo, L. 2023. Evaluating the photochemical degradation of biodegradable plastics. Poster presentation at the annual UR@UWM symposium. University of Wisconsin-Milwaukee, Milwaukee, August 4, 2023.
Deposition and removal of emerging contaminants in the Milwaukee Estuary Area of Concern (2023-2025, PIs: Drs. Inna Popova and Laodong Guo, Supported by Freshwater Collaborative of Wisconsin)
  • Guo, L., 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, Prague, Czech Republic. 6-11 July 2025.
  • Guo, L., Kteeba, S.M., Krueger, S.J. 2025. Variations of PFAS concentrations in Milwaukee estuary sediments: insights into contamination history and sources. Presentation at the 68th IAGLR Conference, Milwaukee, June 2-6, 2025.
  • Krueger, S.J., Zhang, W., Kteeba, S.M., Wang, Y. and Guo, L. 2025. Partitioning of PFAS between dissolved and colloidal phases in freshwater environments. Presentation at the 68th IAGLR Conference, Milwaukee, June 2-6, 2025.
  • Krueger, S.J., Wahl, T., Klump, J.V., and Guo, L. 2025. Deposition of toxic metals and sedimentary organic carbon in Green Bay, Lake Michigan. Presentation at the 68th IAGLR Conference, Milwaukee, June 2-6, 2025.
  • Kteeba, S.M. and Guo, L*. 2024. PFAS binding to dissolved organic matter released from microplastics. Oral presentation at the 2024 ACS Fall Meeting, August 18-22, 2024. Denver, CO (Abstract ID: 4109564).
  • Wilson, B., Krueger, S.J., Kteeba, S.M and Guo, L. 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.

 

Funding Support

Freshwater Collaborative of Wisconsin

Freshwater collaborative of Wisconsin

2020-2022 (UWSA.09)

2023-2025 (SL3.27)

National Science Foundation

Division of Chemistry: award #2204145

(2022-2026)
 

University of Wisconsin-Milwaukee Logo

Discovery and Innovation Grant (DIG) Program

2020-2022 (PI), 2022-2024 (Co-PI)