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., 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)
  • 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. 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)